feat: Add SD multiblock write support

Add support for CMD25 to write multiple sequential blocks in one go, in
an attempt to speed up uploads. It still needs to be benchmarked if this
actually results in a meaningful speedup.

Also fix logging from SD driver to be visible even when running under
micropython.

Signed-off-by: Matthias Blankertz <matthias@blankertz.org>

software/boards/RPI_PICO_W/board.c

@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2025 Matthias Blankertz <matthias@blankertz.org>
+
+#include "py/obj.h"
+#include "py/runtime.h"
+#include "py/objstr.h"
+
+#ifndef TONBERRY_GIT_REVISION
+#define TONBERRY_GIT_REVISION "unknown"
+#endif
+#ifndef TONBERRY_VERSION
+#define TONBERRY_VERSION "unknown"
+#endif
+
+static const MP_DEFINE_STR_OBJ(tonberry_git_revision_obj, TONBERRY_GIT_REVISION);
+static const MP_DEFINE_STR_OBJ(tonberry_version_obj, TONBERRY_VERSION);
+
+static const mp_rom_map_elem_t board_module_globals_table[] = {
+    {MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_board)},
+    {MP_ROM_QSTR(MP_QSTR_revision), MP_ROM_PTR(&tonberry_git_revision_obj)},
+    {MP_ROM_QSTR(MP_QSTR_version), MP_ROM_PTR(&tonberry_version_obj)},
+};
+static MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);
+
+const mp_obj_module_t board_cmodule = {
+    .base = {&mp_type_module},
+    .globals = (mp_obj_dict_t *)&board_module_globals,
+};
+MP_REGISTER_MODULE(MP_QSTR_board, board_cmodule);

software/boards/RPI_PICO_W/mpconfigboard.cmake

@@ -20,3 +20,22 @@ set(GEN_PINS_CSV_ARG --board-csv "${GEN_PINS_BOARD_CSV}")
 
 add_link_options("-Wl,--print-memory-usage")
 set(PICO_USE_FASTEST_SUPPORTED_CLOCK 1)
+
+find_program(GIT git)
+
+execute_process(COMMAND ${GIT} rev-parse HEAD
+    WORKING_DIRECTORY "${CMAKE_CURRENT_LIST_DIR}"
+    OUTPUT_VARIABLE TONBERRY_GIT_REVISION
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+)
+
+execute_process(COMMAND ${GIT} describe --match 'v*' --always --dirty
+    WORKING_DIRECTORY "${CMAKE_CURRENT_LIST_DIR}"
+    OUTPUT_VARIABLE TONBERRY_VERSION
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+)
+
+set(MICROPY_SOURCE_BOARD "${CMAKE_CURRENT_LIST_DIR}/board.c")
+set(MICROPY_DEF_BOARD
+    TONBERRY_GIT_REVISION="${TONBERRY_GIT_REVISION}"
+    TONBERRY_VERSION="${TONBERRY_VERSION}")

software/modules/rp2_sd/module.c

@@ -1,11 +1,14 @@
 // SPDX-License-Identifier: MIT
 // Copyright (c) 2025 Matthias Blankertz <matthias@blankertz.org>
 
+#include <stdarg.h>
+
 #include "py/obj.h"
 #include "sd.h"
 
 // Include MicroPython API.
 #include "py/mperrno.h"
+#include "py/mpprint.h"
 #include "py/runtime.h"
 
 // This module is RP2 specific
@@ -13,6 +16,14 @@
 
 #include <string.h>
 
+void sd_printf(const char *fmt, ...)
+{
+    va_list ap;
+    va_start(ap, fmt);
+    mp_vprintf(&mp_sys_stdout_print, fmt, ap);
+    va_end(ap);
+}
+
 const mp_obj_type_t sdcard_type;
 struct sdcard_obj {
     mp_obj_base_t base;
@@ -89,11 +100,14 @@ static mp_obj_t sdcard_writeblocks(mp_obj_t self_obj, mp_obj_t block_obj, mp_obj
     if (bufinfo.len % SD_SECTOR_SIZE != 0)
         mp_raise_ValueError(MP_ERROR_TEXT("Buffer length is invalid"));
     const int nblocks = bufinfo.len / SD_SECTOR_SIZE;
-    for (int block = 0; block < nblocks; block++) {
-        // TODO: Implement CMD25 write multiple blocks
-        if (!sd_writeblock(&self->sd_context, start_block + block, bufinfo.buf + block * SD_SECTOR_SIZE))
-            mp_raise_OSError(MP_EIO);
+    bool ret;
+    if (nblocks > 1) {
+        ret = sd_writeblocks(&self->sd_context, start_block, nblocks, bufinfo.buf);
+    } else {
+        ret = sd_writeblock(&self->sd_context, start_block, bufinfo.buf);
     }
+    if (!ret)
+        mp_raise_OSError(MP_EIO);
     return mp_const_none;
 }
 static MP_DEFINE_CONST_FUN_OBJ_3(sdcard_writeblocks_obj, sdcard_writeblocks);

software/modules/rp2_sd/sd.c

@@ -6,7 +6,7 @@
 #include <stdio.h>
 #include <string.h>
 
-// #define SD_DEBUG
+extern void sd_printf(const char *fmt, ...);
 
 #define SD_R1_ILLEGAL_COMMAND (1 << 2)
 
@@ -26,14 +26,14 @@ static bool sd_early_init(void)
     for (int i = 0; i < 500; ++i) {
         if (sd_cmd(0, 0, 1, &buf)) {
 #ifdef SD_DEBUG
-            printf("CMD0 resp %02hhx\n", buf);
+            sd_printf("CMD0 resp %02x\n", buf);
 #endif
             if (buf == 0x01) {
                 return true;
             }
         }
 #ifdef SD_DEBUG
-        printf("CMD0 timeout, try again...\n");
+        sd_printf("CMD0 timeout, try again...\n");
 #endif
     }
     return false;
@@ -44,14 +44,14 @@ static bool sd_check_interface_condition(void)
     uint8_t buf[5];
     if (sd_cmd(8, 0x000001AA, 5, buf)) {
         if ((buf[3] & 0xf) != 0x1 || buf[4] != 0xAA) {
-            printf("sd_init: check interface condition failed\n");
+            sd_printf("sd_init: check interface condition failed\n");
             return false;
         }
     } else {
         if (buf[0] & SD_R1_ILLEGAL_COMMAND) {
-            printf("sd_init: check interface condition returned illegal command - old card?\n");
+            sd_printf("sd_init: check interface condition returned illegal command - old card?\n");
         } else {
-            printf("sd_init: check interface condition failed\n");
+            sd_printf("sd_init: check interface condition failed\n");
             return false;
         }
     }
@@ -72,12 +72,12 @@ static bool sd_send_op_cond(void)
         if (!result) {
             if (use_acmd && buf & SD_R1_ILLEGAL_COMMAND) {
 #ifdef SD_DEBUG
-                printf("sd_init: card does not understand ACMD41, try CMD1...\n");
+                sd_printf("sd_init: card does not understand ACMD41, try CMD1...\n");
 #endif
                 use_acmd = false;
                 continue;
             } else if (buf != 0x01) {
-                printf("sd_init: send_op_cond failed\n");
+                sd_printf("sd_init: send_op_cond failed\n");
                 return false;
             } else {
                 continue;
@@ -87,7 +87,7 @@ static bool sd_send_op_cond(void)
             return true;
         }
     }
-    printf("sd_init: send_op_cond: timeout waiting for !idle\n");
+    sd_printf("sd_init: send_op_cond: timeout waiting for !idle\n");
     return false;
 }
 
@@ -107,7 +107,7 @@ static void sd_dump_cid [[maybe_unused]] (void)
         const uint8_t crc = sd_crc7(15, buf);
         const uint8_t card_crc = buf[15] >> 1;
         if (card_crc != crc) {
-            printf("CRC mismatch: Got %02hhx, expected %02hhx\n", card_crc, crc);
+            sd_printf("CRC mismatch: Got %02x, expected %02x\n", card_crc, crc);
             // Some cheap SD cards always report CRC=0, don't fail in that case
             if (card_crc != 0) {
                 return;
@@ -122,8 +122,8 @@ static void sd_dump_cid [[maybe_unused]] (void)
         uint32_t psn = buf[9] << 24 | buf[10] << 16 | buf[11] << 8 | buf[12];
         int mdt_year = 2000 + ((buf[13] & 0xf) << 4 | (buf[14] & 0xf0) >> 4);
         int mdt_month = buf[14] & 0x0f;
-        printf("CID: mid: %02hhx, oid: %.2s, pnm: %.5s, prv: %02hhx, psn: %08" PRIx32 ", mdt_year: %d, mdt_month: %d\n",
-               mid, oid, pnm, prv, psn, mdt_year, mdt_month);
+        sd_printf("CID: mid: %02x, oid: %.2s, pnm: %.5s, prv: %02x, psn: %08" PRIx32 ", mdt_year: %d, mdt_month: %d\n",
+                  mid, oid, pnm, prv, psn, mdt_year, mdt_month);
     }
 }
 
@@ -131,13 +131,13 @@ static bool sd_read_csd(struct sd_context *sd_context)
 {
     uint8_t buf[16];
     if (!sd_cmd_read(9, 0, 16, buf)) {
-        printf("Failed to read CSD\n");
+        sd_printf("Failed to read CSD\n");
         return false;
     }
     const uint8_t crc = sd_crc7(15, buf);
     const uint8_t card_crc = buf[15] >> 1;
     if (card_crc != crc) {
-        printf("CRC mismatch: Got %02hhx, expected %02hhx\n", card_crc, crc);
+        sd_printf("CRC mismatch: Got %02x, expected %02x\n", card_crc, crc);
         // Some cheap SD cards always report CRC=0, don't fail in that case
         if (card_crc != 0) {
             return false;
@@ -151,12 +151,12 @@ static bool sd_read_csd(struct sd_context *sd_context)
     switch (csd_ver) {
     case 0: {
         if (sd_context->sdhc_sdxc) {
-            printf("sd_init: Got CSD v1.0 but card is SDHC/SDXC?\n");
+            sd_printf("sd_init: Got CSD v1.0 but card is SDHC/SDXC?\n");
             return false;
         }
         const unsigned read_bl_len = buf[5] & 0xf;
         if (read_bl_len < 9 || read_bl_len > 11) {
-            printf("Invalid read_bl_len in CSD 1.0\n");
+            sd_printf("Invalid read_bl_len in CSD 1.0\n");
             return false;
         }
         blocksize = 1 << (buf[5] & 0xf);
@@ -176,15 +176,15 @@ static bool sd_read_csd(struct sd_context *sd_context)
         break;
     }
     case 2: {
-        printf("sd_init: Got CSD v3.0, but SDUC does not support SPI.\n");
+        sd_printf("sd_init: Got CSD v3.0, but SDUC does not support SPI.\n");
         return false;
     }
     }
     sd_context->blocks = blocks;
     sd_context->blocksize = blocksize;
 #ifdef SD_DEBUG
-    printf("CSD version %u.0, blocksize %u, blocks %u, capacity %llu MiB, max speed %u\n", version, blocksize, blocks,
-           ((uint64_t)blocksize * blocks) / (1024 * 1024), max_speed);
+    sd_printf("CSD version %u.0, blocksize %u, blocks %u, capacity %u MiB, max speed %u\n", version, blocksize, blocks,
+              (uint32_t)(((uint64_t)blocksize * blocks) / (1024 * 1024)), max_speed);
 #endif
     return true;
 }
@@ -205,11 +205,11 @@ bool sd_init(struct sd_context *sd_context, int mosi, int miso, int sck, int ss,
 
     uint32_t ocr;
     if (!sd_read_ocr(&ocr)) {
-        printf("sd_init: read OCR failed\n");
+        sd_printf("sd_init: read OCR failed\n");
         goto out_spi;
     }
     if ((ocr & 0x00380000) != 0x00380000) {
-        printf("sd_init: unsupported card voltage range\n");
+        sd_printf("sd_init: unsupported card voltage range\n");
         goto out_spi;
     }
 
@@ -219,11 +219,11 @@ bool sd_init(struct sd_context *sd_context, int mosi, int miso, int sck, int ss,
     sd_spi_set_bitrate(rate);
 
     if (!sd_read_ocr(&ocr)) {
-        printf("sd_init: read OCR failed\n");
+        sd_printf("sd_init: read OCR failed\n");
         goto out_spi;
     }
     if (!(ocr & (1 << 31))) {
-        printf("sd_init: card not powered up but !idle?\n");
+        sd_printf("sd_init: card not powered up but !idle?\n");
         goto out_spi;
     }
     sd_context->sdhc_sdxc = (ocr & (1 << 30));
@@ -234,20 +234,20 @@ bool sd_init(struct sd_context *sd_context, int mosi, int miso, int sck, int ss,
 
     if (sd_context->blocksize != SD_SECTOR_SIZE) {
         if (sd_context->blocksize != 1024 && sd_context->blocksize != 2048) {
-            printf("sd_init: Unsupported block size %u\n", sd_context->blocksize);
+            sd_printf("sd_init: Unsupported block size %u\n", sd_context->blocksize);
             goto out_spi;
         }
         // Attempt SET_BLOCKLEN command
         uint8_t resp[1];
         if (!sd_cmd(16, SD_SECTOR_SIZE, 1, resp)) {
-            printf("sd_init: SET_BLOCKLEN failed\n");
+            sd_printf("sd_init: SET_BLOCKLEN failed\n");
             goto out_spi;
         }
         // Successfully set blocksize to SD_SECTOR_SIZE, adjust context
         sd_context->blocks *= sd_context->blocksize / SD_SECTOR_SIZE;
 #ifdef SD_DEBUG
-        printf("Adjusted blocksize from %u to 512, card now has %u blocks\n", sd_context->blocksize,
-               sd_context->blocks);
+        sd_printf("Adjusted blocksize from %u to 512, card now has %u blocks\n", sd_context->blocksize,
+                  sd_context->blocks);
 #endif
         sd_context->blocksize = SD_SECTOR_SIZE;
     }
@@ -307,7 +307,7 @@ bool sd_readblock_complete(struct sd_context *sd_context)
 
 bool sd_readblock_is_complete(struct sd_context *sd_context) { return sd_cmd_read_is_complete(); }
 
-bool sd_writeblock(struct sd_context *sd_context, size_t sector_num, uint8_t buffer[const static SD_SECTOR_SIZE])
+bool sd_writeblock(struct sd_context *sd_context, const size_t sector_num, uint8_t buffer[const static SD_SECTOR_SIZE])
 {
     if (!sd_context->initialized || sector_num >= sd_context->blocks)
         return false;
@@ -319,3 +319,20 @@ bool sd_writeblock(struct sd_context *sd_context, size_t sector_num, uint8_t buf
     }
     return sd_cmd_write(24, addr, SD_SECTOR_SIZE, buffer);
 }
+
+bool sd_writeblocks(struct sd_context *sd_context, const size_t sector_num, const size_t sectors, uint8_t *const buffer)
+{
+    if (!sd_context->initialized || sector_num + sectors >= sd_context->blocks)
+        return false;
+
+    if (!sd_context->sdhc_sdxc) {
+        // Don't use multi-block writes for SDSC for now
+        // Need to configure WRITE_BL_LEN correctly
+        for (size_t sector = 0; sector < sectors; ++sector) {
+            if (!sd_writeblock(sd_context, sector_num + sector, buffer + sector * SD_SECTOR_SIZE))
+                return false;
+        }
+        return true;
+    }
+    return sd_cmd_write_multiple(25, sector_num, sectors, SD_SECTOR_SIZE, buffer);
+}

software/modules/rp2_sd/sd.h

@@ -24,3 +24,4 @@ bool sd_readblock_complete(struct sd_context *context);
 bool sd_readblock_is_complete(struct sd_context *context);
 
 bool sd_writeblock(struct sd_context *context, size_t sector_num, uint8_t buffer[const static SD_SECTOR_SIZE]);
+bool sd_writeblocks(struct sd_context *sd_context, const size_t sector_num, const size_t sectors, uint8_t *buffer);

software/modules/rp2_sd/sd_spi.c

@@ -12,6 +12,8 @@
 #include <pico/time.h>
 #include <string.h>
 
+extern void sd_printf(const char *fmt, ...);
+
 typedef enum { DMA_READ_TOKEN, DMA_READ, DMA_IDLE } sd_dma_state;
 
 struct sd_dma_context {
@@ -222,7 +224,7 @@ bool sd_cmd_read_complete(void)
     sd_spi_read_blocking(0xff, &buf, 1);
     if (sd_spi_context.sd_dma_context.read_token_buf != 0xfe) {
 #ifdef SD_DEBUG
-        printf("read failed: invalid read token %02hhx\n", sd_spi_context.sd_dma_context.read_token_buf);
+        sd_printf("read failed: invalid read token %02x\n", sd_spi_context.sd_dma_context.read_token_buf);
 #endif
         return false;
     }
@@ -231,7 +233,7 @@ bool sd_cmd_read_complete(void)
     const uint16_t act_crc = sd_spi_context.sd_dma_context.crc_buf[0] << 8 | sd_spi_context.sd_dma_context.crc_buf[1];
     if (act_crc != expect_crc) {
 #ifdef SD_DEBUG
-        printf("read CRC fail: got %04hx, expected %04hx\n", act_crc, expect_crc);
+        sd_printf("read CRC fail: got %04x, expected %04x\n", act_crc, expect_crc);
 #endif
         return false;
     }
@@ -239,10 +241,9 @@ bool sd_cmd_read_complete(void)
     return true;
 }
 
-bool sd_cmd_write(uint8_t cmd, uint32_t arg, unsigned datalen, uint8_t data[const static datalen])
+static bool sd_cmd_write_begin(uint8_t cmd, uint32_t arg)
 {
-    uint8_t buf[2];
-    const uint16_t crc = sd_crc16(datalen, data);
+    uint8_t buf[1];
     sd_spi_cmd_send(cmd, arg);
     // Read up to 8 garbage bytes (0xff), followed by R1 (MSB is zero)
     bool got_r1 = false;
@@ -253,9 +254,20 @@ bool sd_cmd_write(uint8_t cmd, uint32_t arg, unsigned datalen, uint8_t data[cons
             break;
         }
     }
-    if (!got_r1 || buf[0] != 0x00)
-        goto abort;
-    buf[0] = 0xfe;
+    if (!got_r1 || buf[0] != 0x00) {
+#ifdef SD_DEBUG
+        sd_printf("write cmd fail: %02x\n", buf[0]);
+#endif
+        return false;
+    }
+    return true;
+}
+
+static bool sd_cmd_write_block(uint8_t token, unsigned datalen, uint8_t data[const static datalen])
+{
+    uint8_t buf[2];
+    const uint16_t crc = sd_crc16(datalen, data);
+    buf[0] = token;
     sd_spi_write_blocking(buf, 1);
     sd_spi_write_blocking(data, datalen);
     buf[0] = crc >> 8;
@@ -264,11 +276,16 @@ bool sd_cmd_write(uint8_t cmd, uint32_t arg, unsigned datalen, uint8_t data[cons
     sd_spi_read_blocking(0xff, buf, 1);
     if ((buf[0] & 0x1f) != 0x5) {
 #ifdef SD_DEBUG
-        printf("Write fail: %2hhx\n", buf[0]);
+        sd_printf("Write fail: %2x\n", buf[0]);
 #endif
-        goto abort;
+        return false;
     }
+    return true;
+}
 
+static bool sd_cmd_write_wait_nbusy(void)
+{
+    uint8_t buf[1];
     int timeout = 0;
     bool got_done = false;
     for (timeout = 0; timeout < 131072; ++timeout) {
@@ -279,18 +296,73 @@ bool sd_cmd_write(uint8_t cmd, uint32_t arg, unsigned datalen, uint8_t data[cons
         }
     }
 #ifdef SD_DEBUG
-    printf("dbg write end: %d, %2hhx\n", timeout, buf[0]);
+    sd_printf("dbg write end: %d, %2x\n", timeout, buf[0]);
 #endif
-    if (!got_done)
+    return got_done;
+}
+
+bool sd_cmd_write(uint8_t cmd, uint32_t arg, unsigned datalen, uint8_t data[const static datalen])
+{
+#ifdef SD_DEBUG
+    sd_printf("write 1 block at %u\n", arg);
+#endif
+    uint8_t buf[2];
+    if (!sd_cmd_write_begin(cmd, arg))
+        goto abort;
+    if (!sd_cmd_write_block(0xfe, datalen, data))
+        goto abort;
+    if (!sd_cmd_write_wait_nbusy())
         goto abort;
 
     gpio_put(sd_spi_context.ss, true);
     sd_spi_read_blocking(0xff, buf, 1);
+#ifdef SD_DEBUG
+    sd_printf("write ok\n");
+#endif
     return true;
 
 abort:
     gpio_put(sd_spi_context.ss, true);
     sd_spi_read_blocking(0xff, buf, 1);
+#ifdef SD_DEBUG
+    sd_printf("write fail\n");
+#endif
+    return false;
+}
+
+bool sd_cmd_write_multiple(uint8_t cmd, uint32_t arg, unsigned blocks, unsigned datalen, uint8_t *const data)
+{
+#ifdef SD_DEBUG
+    sd_printf("write %u blocks at %u\n", blocks, arg);
+#endif
+    uint8_t buf[2];
+    if (!sd_cmd_write_begin(cmd, arg))
+        goto abort;
+    for (unsigned i = 0; i < blocks; ++i) {
+        if (!sd_cmd_write_block(0b11111100, datalen, data + datalen * i))
+            goto abort;
+        if (!sd_cmd_write_wait_nbusy())
+            goto abort;
+    }
+    buf[0] = 0b11111101;
+    buf[1] = 0xff;
+    sd_spi_write_blocking(buf, 2);
+    if (!sd_cmd_write_wait_nbusy())
+        goto abort;
+
+    gpio_put(sd_spi_context.ss, true);
+    sd_spi_read_blocking(0xff, buf, 1);
+#ifdef SD_DEBUG
+    sd_printf("write ok\n");
+#endif
+    return true;
+
+abort:
+    gpio_put(sd_spi_context.ss, true);
+    sd_spi_read_blocking(0xff, buf, 1);
+#ifdef SD_DEBUG
+    sd_printf("write fail\n");
+#endif
     return false;
 }
 

software/modules/rp2_sd/sd_spi.h

@@ -27,3 +27,4 @@ bool sd_cmd_read_complete(void);
 bool sd_cmd_read_is_complete(void);
 
 bool sd_cmd_write(uint8_t cmd, uint32_t arg, unsigned datalen, uint8_t data[const static datalen]);
+bool sd_cmd_write_multiple(uint8_t cmd, uint32_t arg, unsigned blocks, unsigned datalen, uint8_t *const data);

software/src/app.py

@@ -9,8 +9,8 @@ from utils import TimerManager
 Dependencies = namedtuple('Dependencies', ('mp3player', 'nfcreader', 'buttons', 'playlistdb', 'hwconfig', 'leds',
                                            'config'))
 
-# Should be ~ 6dB steps
-VOLUME_CURVE = [1, 2, 4, 8, 16, 32, 63, 126, 251]
+# Should be ~ 3dB steps
+VOLUME_CURVE = [1, 2, 3, 4, 6, 8, 11, 16, 23, 32, 45, 64, 91, 128, 181, 255]
 
 
 class PlayerApp:
@@ -52,11 +52,19 @@ class PlayerApp:
         self.hwconfig = deps.hwconfig(self)
         self.leds = deps.leds(self)
         self.tag_mode = self.config.get_tagmode()
+        self.volume_max = self.config.get_volume_max()
+        self.volume_pos = 3  # fallback if config.get_volume_boot is nonsense
+        try:
+            for idx, val in enumerate(VOLUME_CURVE):
+                if val >= self.config.get_volume_boot():
+                    self.volume_pos = idx
+                    break
+        except (TypeError, ValueError):
+            pass
         self.playing_tag = None
         self.playlist = None
         self.buttons = deps.buttons(self) if deps.buttons is not None else None
         self.mp3file = None
-        self.volume_pos = 3
         self.paused = False
         self.playing = False
         self.player.set_volume(VOLUME_CURVE[self.volume_pos])
@@ -74,7 +82,7 @@ class PlayerApp:
         uid_str = b''.join('{:02x}'.format(x).encode() for x in new_tag)
         if self.tag_mode == 'tagremains' or (self.tag_mode == 'tagstartstop' and new_tag != self.playing_tag):
             self._set_playlist(uid_str)
-            self.playing_tag = new_tag
+            self.playing_tag = new_tag if self.playlist is not None else None
         elif self.tag_mode == 'tagstartstop':
             print('Tag presented again, stopping playback')
             self._unset_playlist()
@@ -91,8 +99,10 @@ class PlayerApp:
     def onButtonPressed(self, what):
         assert self.buttons is not None
         if what == self.buttons.VOLUP:
-            self.volume_pos = min(self.volume_pos + 1, len(VOLUME_CURVE) - 1)
-            self.player.set_volume(VOLUME_CURVE[self.volume_pos])
+            new_volume = min(self.volume_pos + 1, len(VOLUME_CURVE) - 1)
+            if VOLUME_CURVE[new_volume] <= self.volume_max:
+                self.volume_pos = new_volume
+                self.player.set_volume(VOLUME_CURVE[self.volume_pos])
         elif what == self.buttons.VOLDOWN:
             self.volume_pos = max(self.volume_pos - 1, 0)
             self.player.set_volume(VOLUME_CURVE[self.volume_pos])
@@ -104,9 +114,6 @@ class PlayerApp:
             self._pause_toggle()
 
     def onPlaybackDone(self):
-        assert self.mp3file is not None
-        self.mp3file.close()
-        self.mp3file = None
         self._play_next()
 
     def onIdleTimeout(self):
@@ -141,9 +148,7 @@ class PlayerApp:
             self.playlist = None
 
     def _play_next(self):
-        if self.playlist is None:
-            return
-        filename = self.playlist.getNextPath()
+        filename = self.playlist.getNextPath() if self.playlist is not None else None
         self._play(filename)
         if filename is None:
             self.playlist = None
@@ -166,7 +171,11 @@ class PlayerApp:
             self._onIdle()
         if filename is not None:
             print(f'Playing {filename!r}')
-            self.mp3file = open(filename, 'rb')
+            try:
+                self.mp3file = open(filename, 'rb')
+            except OSError as ex:
+                print(f"Could not play file {filename}: {ex}")
+                return
             self.player.play(self.mp3file, offset)
             self.paused = False
             self._onActive()
@@ -193,3 +202,9 @@ class PlayerApp:
 
     def get_nfc(self):
         return self.nfc
+
+    def get_playlist_db(self):
+        return self.playlist_db
+
+    def get_leds(self):
+        return self.leds

software/src/main.py

@@ -3,13 +3,12 @@
 
 import aiorepl  # type: ignore
 import asyncio
-from errno import ENOENT
 import machine
 import micropython
 import network
-import os
 import time
 import ubinascii
+import sys
 
 # Own modules
 import app
@@ -37,14 +36,22 @@ hwconfig.board_init()
 machine.mem32[0x40030000 + 0x00] = 0x10
 
 
-def setup_wifi():
+def setup_wifi(ssid='', passphrase='', security=network.WLAN.SEC_WPA_WPA2):
     network.hostname("TonberryPico")
-    wlan = network.WLAN(network.WLAN.IF_AP)
-    wlan.config(ssid=f"TonberryPicoAP_{machine.unique_id().hex()}", security=wlan.SEC_OPEN)
-    wlan.active(True)
+    if ssid is None or ssid == '':
+        apname = f"TonberryPicoAP_{machine.unique_id().hex()}"
+        print(f"Create AP {apname}")
+        wlan = network.WLAN(network.WLAN.IF_AP)
+        wlan.config(ssid=apname, password=passphrase if passphrase is not None else '', security=security)
+        wlan.active(True)
+    else:
+        print(f"Connect to SSID {ssid} with passphrase {passphrase}...")
+        wlan = network.WLAN()
+        wlan.active(True)
+        wlan.connect(ssid, passphrase if passphrase is not None else '', security=security)
 
-    # disable power management
-    wlan.config(pm=network.WLAN.PM_NONE)
+    # configure power management
+    wlan.config(pm=network.WLAN.PM_PERFORMANCE)
 
     mac = ubinascii.hexlify(network.WLAN().config('mac'), ':').decode()
     print(f"     mac: {mac}")
@@ -58,34 +65,44 @@ async def wdt_task(wdt):
     # TODO: more checking of app health
     # Right now this only protects against the asyncio executor crashing completely
     while True:
-        await asyncio.sleep_ms(500)
+        await asyncio.sleep_ms(100)
         wdt.feed()
 
 DB_PATH = '/sd/tonberry.db'
 
 config = Configuration()
 
+# Setup LEDs
+np = NeoPixel(hwconfig.LED_DIN, config.get_led_count(), sm=1)
+led_max = config.get_led_max()
+np.fill((led_max, led_max, 0))
+np.write()
+
 
 def run():
     asyncio.new_event_loop()
-    # Setup LEDs
-    np = NeoPixel(hwconfig.LED_DIN, config.get_led_count(), sm=1)
 
-    # Wifi with default config
-    setup_wifi()
+    if machine.Pin(hwconfig.BUTTONS[1], machine.Pin.IN, machine.Pin.PULL_UP).value() == 0:
+        np.fill((0, 0, led_max))
+        np.write()
+        # Force default access point
+        setup_wifi('', '', network.WLAN.SEC_OPEN)
+    else:
+        secstring = config.get_wifi_security()
+        security = network.WLAN.SEC_WPA_WPA2
+        if secstring == 'open':
+            security = network.WLAN.SEC_OPEN
+        elif secstring == 'wpa_wpa2':
+            security = network.WLAN.SEC_WPA_WPA2
+        elif secstring == 'wpa3':
+            security = network.WLAN.SEC_WPA3
+        elif secstring == 'wpa2_wpa3':
+            security = network.WLAN.SEC_WPA2_WPA3
+        setup_wifi(config.get_wifi_ssid(), config.get_wifi_passphrase(), security)
 
     # Setup MP3 player
     with SDContext(mosi=hwconfig.SD_DI, miso=hwconfig.SD_DO, sck=hwconfig.SD_SCK, ss=hwconfig.SD_CS,
                    baudrate=hwconfig.SD_CLOCKRATE):
-        # Temporary hack: build database from folders if no database exists
-        # Can be removed once playlists can be created via API
-        try:
-            _ = os.stat(DB_PATH)
-        except OSError as ex:
-            if ex.errno == ENOENT:
-                print("No playlist DB found, trying to build DB from tag dirs")
-                builddb()
-
         with BTreeFileManager(DB_PATH) as playlistdb, \
              AudioContext(hwconfig.I2S_DIN, hwconfig.I2S_DCLK, hwconfig.I2S_LRCLK) as audioctx:
 
@@ -99,38 +116,39 @@ def run():
                                     buttons=lambda the_app: Buttons(the_app, config, hwconfig),
                                     playlistdb=lambda _: playlistdb,
                                     hwconfig=lambda _: hwconfig,
-                                    leds=lambda _: LedManager(np),
+                                    leds=lambda _: LedManager(np, config),
                                     config=lambda _: config)
             the_app = app.PlayerApp(deps)
 
             start_webserver(config, the_app)
             # Start
-            wdt = machine.WDT(timeout=1000)
+            wdt = machine.WDT(timeout=2000)
             asyncio.create_task(aiorepl.task({'timer_manager': TimerManager(),
                                               'app': the_app}))
             asyncio.create_task(wdt_task(wdt))
             asyncio.get_event_loop().run_forever()
 
 
-def builddb():
-    """
-    For testing, build a playlist db based on the previous tag directory format.
-    Can be removed once uploading files / playlist via the web api is possible.
-    """
-    try:
-        os.unlink(DB_PATH)
-    except OSError:
-        pass
-    with BTreeFileManager(DB_PATH) as db:
-        for name, type_, _, _ in os.ilistdir(b'/sd'):
-            if type_ != 0x4000:
-                continue
-            fl = [b'/sd/' + name + b'/' + x for x in os.listdir(b'/sd/' + name) if x.endswith(b'.mp3')]
-            db.createPlaylistForTag(name, fl)
-    os.sync()
+def error_blink():
+    while True:
+        if machine.Pin(hwconfig.BUTTONS[0], machine.Pin.IN, machine.Pin.PULL_UP).value() == 0:
+            machine.reset()
+        np.fill((led_max, 0, 0))
+        np.write()
+        time.sleep_ms(500)
+        np.fill((0, 0, 0))
+        np.write()
+        time.sleep_ms(500)
 
 
 if __name__ == '__main__':
     time.sleep(1)
     if machine.Pin(hwconfig.BUTTONS[0], machine.Pin.IN, machine.Pin.PULL_UP).value() != 0:
-        run()
+        try:
+            run()
+        except Exception as ex:
+            sys.print_exception(ex)
+            error_blink()
+    else:
+        np.fill((led_max, 0, 0))
+        np.write()

software/src/utils/__init__.py

@@ -2,6 +2,7 @@
 # Copyright (c) 2025 Matthias Blankertz <matthias@blankertz.org>
 
 from utils.helpers import safe_callback
+from utils.timer import TimerManager
 from utils.buttons import Buttons
 from utils.config import Configuration
 from utils.leds import LedManager
@@ -9,7 +10,6 @@ from utils.mbrpartition import MBRPartition
 from utils.pinindex import get_pin_index
 from utils.playlistdb import BTreeDB, BTreeFileManager
 from utils.sdcontext import SDContext
-from utils.timer import TimerManager
 
 __all__ = ["BTreeDB", "BTreeFileManager", "Buttons", "Configuration", "get_pin_index", "LedManager", "MBRPartition",
            "safe_callback", "SDContext", "TimerManager"]

software/src/utils/buttons.py

@@ -5,7 +5,7 @@ import asyncio
 import machine
 import micropython
 import time
-from utils import safe_callback
+from utils import safe_callback, TimerManager
 try:
     from typing import TYPE_CHECKING  # type: ignore
 except ImportError:
@@ -32,6 +32,7 @@ class Buttons:
     def __init__(self, cb: "ButtonCallback", config, hwconfig):
         self.button_map = config.get_button_map()
         self.hw_buttons = hwconfig.BUTTONS
+        self.hwconfig = hwconfig
         self.cb = cb
         self.buttons = dict()
         for key_id, key_name in self.KEYMAP.items():
@@ -42,6 +43,7 @@ class Buttons:
         self.int_flag = asyncio.ThreadSafeFlag()
         self.pressed: list[int] = []
         self.last: dict[int, int] = {}
+        self.timer_manager = TimerManager()
         for button in self.buttons.keys():
             button.irq(handler=self._interrupt, trigger=machine.Pin.IRQ_FALLING | machine.Pin.IRQ_RISING)
         asyncio.create_task(self.task())
@@ -69,6 +71,10 @@ class Buttons:
             # print(f'B{keycode} {now}')
             self.pressed.append(keycode)
             self.int_flag.set()
+            if keycode == self.VOLDOWN:
+                self.timer_manager.schedule(time.ticks_ms() + 5000, self.long_press_shutdown)
+        if button.value() == 1 and keycode == self.VOLDOWN:
+            self.timer_manager.cancel(self.long_press_shutdown)
 
     async def task(self):
         while True:
@@ -76,3 +82,9 @@ class Buttons:
             while len(self.pressed) > 0:
                 what = self.pressed.pop()
                 safe_callback(lambda: self.cb.onButtonPressed(what), "button callback")
+
+    def long_press_shutdown(self):
+        if self.hwconfig.get_on_battery():
+            self.hwconfig.power_off()
+        else:
+            machine.reset()

software/src/utils/config.py

@@ -22,7 +22,15 @@ class Configuration:
             'PREV': None,
             'NEXT': 1,
         },
-        'TAGMODE': 'tagremains'
+        'TAGMODE': 'tagremains',
+        'WIFI': {
+            'SSID': '',
+            'PASSPHRASE': '',
+            'SECURITY': 'wpa_wpa2',
+        },
+        'VOLUME_MAX': 255,
+        'VOLUME_BOOT': 16,
+        'LED_MAX': 255,
     }
 
     def __init__(self, config_path='/config.json'):
@@ -87,6 +95,24 @@ class Configuration:
     def get_tagmode(self) -> str:
         return self._get('TAGMODE')
 
+    def get_wifi_ssid(self) -> str:
+        return self._get('WIFI')['SSID']
+
+    def get_wifi_passphrase(self) -> str:
+        return self._get('WIFI')['PASSPHRASE']
+
+    def get_wifi_security(self) -> str:
+        return self._get('WIFI')['SECURITY']
+
+    def get_volume_max(self) -> int:
+        return self._get('VOLUME_MAX')
+
+    def get_led_max(self) -> int:
+        return self._get('LED_MAX')
+
+    def get_volume_boot(self) -> int:
+        return self._get('VOLUME_BOOT')
+
     # For the web API
     def get_config(self) -> Mapping[str, Any]:
         return self.config
@@ -104,6 +130,9 @@ class Configuration:
         self._validate(self.DEFAULT_CONFIG, config)
         if 'TAGMODE' in config and config['TAGMODE'] not in ['tagremains', 'tagstartstop']:
             raise ValueError("Invalid TAGMODE: Must be 'tagremains' or 'tagstartstop'")
+        if 'WLAN' in config and 'SECURITY' in config['WLAN'] and \
+           config['WLAN']['SECURITY'] not in ['open', 'wpa_wpa2', 'wpa3', 'wpa2_wpa3']:
+            raise ValueError("Invalid WLAN SECURITY: Must be 'open', 'wpa_wpa2', 'wpa3' or 'wpa2_wpa3'")
         self._merge_configs(self.config, config)
         self.config = config
         self._save()

software/src/utils/leds.py

@@ -10,16 +10,17 @@ import time
 class LedManager:
     IDLE = const(0)
     PLAYING = const(1)
+    REBOOTING = const(2)
 
-    def __init__(self, np):
+    def __init__(self, np, config):
         self.led_state = LedManager.IDLE
+        self.brightness = config.get_led_max() / 255
         self.np = np
-        self.brightness = 0.1
         self.leds = len(self.np)
         asyncio.create_task(self.run())
 
     def set_state(self, state):
-        assert state in [LedManager.IDLE, LedManager.PLAYING]
+        assert state in [LedManager.IDLE, LedManager.PLAYING, LedManager.REBOOTING]
         self.led_state = state
 
     def _gamma(self, value, X=2.2):
@@ -50,6 +51,8 @@ class LedManager:
                 self._pulse(time_, (0, 1, 0), 3)
             elif self.led_state == LedManager.PLAYING:
                 self._rainbow(time_)
+            elif self.led_state == LedManager.REBOOTING:
+                self._pulse(time_, (1, 0, 1), 0.2)
             time_ += 0.02
             before = time.ticks_ms()
             await self.np.async_write()

software/src/utils/playlistdb.py

@@ -33,12 +33,13 @@ class BTreeDB(IPlaylistDB):
     PERSIST_OFFSET = b'offset'
 
     class Playlist(IPlaylist):
-        def __init__(self, parent: "BTreeDB", tag: bytes, pos: int, persist, shuffle):
+        def __init__(self, parent: "BTreeDB", tag: bytes, pos: int, persist, shuffle, name):
             self.parent = parent
             self.tag = tag
             self.pos = pos
             self.persist = persist
             self.shuffle = shuffle
+            self.name = name
             self.length = self.parent._getPlaylistLength(self.tag)
             self._shuffle()
 
@@ -168,6 +169,10 @@ class BTreeDB(IPlaylistDB):
         return (b''.join([tag, b'/playlist/']),
                 b''.join([tag, b'/playlist0']))
 
+    @staticmethod
+    def _keyPlaylistName(tag):
+        return b''.join([tag, b'/playlistname'])
+
     def _flush(self):
         """
         Flush the database and call the flush_func if it was provided.
@@ -222,12 +227,13 @@ class BTreeDB(IPlaylistDB):
             raise RuntimeError("Malformed playlist key")
         return int(elements[2])+1
 
-    def _savePlaylist(self, tag, entries, persist, shuffle, flush=True):
+    def _savePlaylist(self, tag, entries, persist, shuffle, name, flush=True):
         self._deletePlaylist(tag, False)
         for idx, entry in enumerate(entries):
             self.db[self._keyPlaylistEntry(tag, idx)] = entry
         self.db[self._keyPlaylistPersist(tag)] = persist
         self.db[self._keyPlaylistShuffle(tag)] = shuffle
+        self.db[self._keyPlaylistName(tag)] = name.encode()
         if flush:
             self._flush()
 
@@ -240,7 +246,7 @@ class BTreeDB(IPlaylistDB):
                 pass
         for k in (self._keyPlaylistPos(tag), self._keyPlaylistPosOffset(tag),
                   self._keyPlaylistPersist(tag), self._keyPlaylistShuffle(tag),
-                  self._keyPlaylistShuffleSeed(tag)):
+                  self._keyPlaylistShuffleSeed(tag), self._keyPlaylistName(tag)):
             try:
                 del self.db[k]
             except KeyError:
@@ -248,6 +254,19 @@ class BTreeDB(IPlaylistDB):
         if flush:
             self._flush()
 
+    def getPlaylists(self):
+        """
+        Get a list of all defined playlists with their tag and names.
+        """
+        playlist_tags = set()
+        for item in self.db:
+            playlist_tags.add(item.split(b'/')[0])
+        playlists = []
+        for tag in playlist_tags:
+            name = self.db.get(self._keyPlaylistName(tag), b'').decode()
+            playlists.append({'tag': tag, 'name': name})
+        return playlists
+
     def getPlaylistForTag(self, tag: bytes):
         """
         Lookup the playlist for 'tag' and return the Playlist object. Return None if no playlist exists for the given
@@ -265,20 +284,24 @@ class BTreeDB(IPlaylistDB):
             return None
         if self._keyPlaylistEntry(tag, pos) not in self.db:
             pos = 0
+        name = self.db.get(self._keyPlaylistName(tag), b'').decode()
         shuffle = self.db.get(self._keyPlaylistShuffle(tag), self.SHUFFLE_NO)
-        return self.Playlist(self, tag, pos, persist, shuffle)
+        return self.Playlist(self, tag, pos, persist, shuffle, name)
 
     def createPlaylistForTag(self, tag: bytes, entries: typing.Iterable[bytes], persist=PERSIST_TRACK,
-                             shuffle=SHUFFLE_NO):
+                             shuffle=SHUFFLE_NO, name: str = ''):
         """
         Create and save a playlist for 'tag' and return the Playlist object. If a playlist already existed for 'tag' it
         is overwritten.
         """
         assert persist in (self.PERSIST_NO, self.PERSIST_TRACK, self.PERSIST_OFFSET)
         assert shuffle in (self.SHUFFLE_NO, self.SHUFFLE_YES)
-        self._savePlaylist(tag, entries, persist, shuffle)
+        self._savePlaylist(tag, entries, persist, shuffle, name)
         return self.getPlaylistForTag(tag)
 
+    def deletePlaylistForTag(self, tag: bytes):
+        self._deletePlaylist(tag)
+
     def validate(self, dump=False):
         """
         Validate the structure of the playlist database.
@@ -357,6 +380,14 @@ class BTreeDB(IPlaylistDB):
                     _ = int(val)
                 except ValueError:
                     fail(f' Bad playlistposoffset value for {last_tag}: {val!r}')
+            elif fields[1] == b'playlistname':
+                val = self.db[k]
+                try:
+                    name = val.decode()
+                    if dump:
+                        print(f'\tName: {name}')
+                except UnicodeError:
+                    fail(f' Bad playlistname for {last_tag}: Not valid unicode')
             else:
                 fail(f'Unknown key {k!r}')
         return result

software/src/webserver.py

@@ -4,34 +4,46 @@ Copyright (c) 2024-2025 Stefan Kratochwil <Kratochwil-LA@gmx.de>
 '''
 
 import asyncio
+import board
+import errno
+import hwconfig
+import json
+import machine
+import network
+import os
+import time
+import ubinascii
 
-from microdot import Microdot, redirect, send_file
+from array import array
+from microdot import Microdot, redirect, send_file, Request
+from utils import TimerManager, LedManager
 
 webapp = Microdot()
 server = None
 config = None
 app = None
 nfc = None
+playlist_db = None
+leds = None
+timer_manager = None
+
+Request.max_content_length = 128 * 1024 * 1024  # 128MB requests allowed
 
 
 def start_webserver(config_, app_):
-    global server, config, app, nfc
-    server = asyncio.create_task(webapp.start_server(port=80))
+    global server, config, app, nfc, playlist_db, leds, timer_manager
+    server = asyncio.create_task(webapp.start_server(host='::0', port=80))
     config = config_
     app = app_
     nfc = app.get_nfc()
+    playlist_db = app.get_playlist_db()
+    leds = app.get_leds()
+    timer_manager = TimerManager()
 
 
 @webapp.before_request
 async def before_request_handler(request):
-    if request.method in ['PUT', 'POST'] and app.is_playing():
-        return "Cannot write to device while playback is active", 503
-    app.reset_idle_timeout()
-
-
-@webapp.before_request
-async def before_request_handler(request):
-    if request.method in ['PUT', 'POST'] and app.is_playing():
+    if request.method in ['PUT', 'POST', 'DELETE'] and app.is_playing():
         return "Cannot write to device while playback is active", 503
     app.reset_idle_timeout()
 
@@ -97,3 +109,188 @@ async def static(request, path):
         # directory traversal is not allowed
         return 'Not found', 404
     return send_file('/frontend/static/' + path, max_age=86400)
+
+
+@webapp.route('/api/v1/playlists', methods=['GET'])
+async def playlists_get(request):
+    return playlist_db.getPlaylists()
+
+
+def is_hex(s):
+    hex_chars = '0123456789abcdef'
+    return all(c in hex_chars for c in s)
+
+
+fsroot = b'/sd'
+
+
+@webapp.route('/api/v1/playlist/<tag>', methods=['GET'])
+async def playlist_get(request, tag):
+    if not is_hex(tag):
+        return 'invalid tag', 400
+
+    playlist = playlist_db.getPlaylistForTag(tag.encode())
+    if playlist is None:
+        return None, 404
+
+    return {
+            'shuffle': playlist.shuffle,
+            'persist': playlist.persist,
+            'paths': [(p[len(fsroot):] if p.startswith(fsroot) else p).decode()
+                      for p in playlist.getPaths()],
+            'name': playlist.name
+    }
+
+
+@webapp.route('/api/v1/playlist/<tag>', methods=['PUT'])
+async def playlist_put(request, tag):
+    if not is_hex(tag):
+        return 'invalid tag', 400
+
+    playlist = request.json
+    if 'persist' in playlist and \
+       playlist['persist'] not in ['no', 'track', 'offset']:
+        return "Invalid 'persist' setting", 400
+    if 'shuffle' in playlist and \
+       playlist['shuffle'] not in ['no', 'yes']:
+        return "Invalid 'shuffle' setting", 400
+
+    playlist_db.createPlaylistForTag(tag.encode(),
+                                     (fsroot + path.encode() for path in playlist.get('paths', [])),
+                                     playlist.get('persist', 'track').encode(),
+                                     playlist.get('shuffle', 'no').encode(),
+                                     playlist.get('name', ''))
+    return '', 204
+
+
+@webapp.route('/api/v1/playlist/<tag>', methods=['DELETE'])
+async def playlist_delete(request, tag):
+    if not is_hex(tag):
+        return 'invalid tag', 400
+    playlist_db.deletePlaylistForTag(tag.encode())
+    return '', 204
+
+
+@webapp.route('/api/v1/audiofiles', methods=['GET'])
+async def audiofiles_get(request):
+    def directory_iterator():
+        yield '['
+        first = True
+
+        def make_json_str(obj):
+            nonlocal first
+            jsonpath = json.dumps(obj)
+            if not first:
+                jsonpath = ',' + jsonpath
+            first = False
+            return jsonpath
+
+        dirstack = [fsroot]
+        while dirstack:
+            current_dir = dirstack.pop()
+            for entry in os.ilistdir(current_dir):
+                name = entry[0]
+                type_ = entry[1]
+                current_path = current_dir + b'/' + name
+                if type_ == 0x4000:
+                    yield make_json_str({'name': current_path[len(fsroot):], 'type': 'directory'})
+                    dirstack.append(current_path)
+                elif type_ == 0x8000:
+                    if name.lower().endswith('.mp3'):
+                        yield make_json_str({'name': current_path[len(fsroot):], 'type': 'file'})
+        yield ']'
+
+    return directory_iterator(), {'Content-Type': 'application/json; charset=UTF-8'}
+
+
+async def stream_to_file(stream, file_, length):
+    data = array('b', range(4096))
+    bytes_copied = 0
+    while True:
+        bytes_read = await stream.readinto(data)
+        if bytes_read == 0:
+            # End of body
+            break
+        bytes_written = file_.write(data[:bytes_read])
+        if bytes_written != bytes_read:
+            # short writes shouldn't happen
+            raise OSError(errno.EIO, 'unexpected short write')
+        bytes_copied += bytes_written
+        if bytes_copied == length:
+            break
+        app.reset_idle_timeout()
+    return bytes_copied
+
+
+@webapp.route('/api/v1/audiofiles', methods=['POST'])
+async def audiofile_upload(request):
+    if 'type' not in request.args or request.args['type'] not in ['file', 'directory']:
+        return 'invalid or missing type', 400
+    if 'location' not in request.args:
+        return 'missing location', 400
+    path = fsroot + '/' + request.args['location']
+    type_ = request.args['type']
+    length = request.content_length
+    print(f'Got upload request of type {type_} to {path} with length {length}')
+    if type_ == 'directory':
+        if length != 0:
+            return 'directory request may not have content', 400
+        os.mkdir(path)
+        return '', 204
+    with open(path, 'wb') as newfile:
+        try:
+            if length > Request.max_body_length:
+                bytes_copied = await stream_to_file(request.stream, newfile, length)
+            else:
+                bytes_copied = newfile.write(request.body)
+        except OSError as ex:
+            return f'error writing data to file: {ex}', 500
+    if bytes_copied == length:
+        return '', 204
+    else:
+        return 'size mismatch', 500
+
+
+def recursive_delete(path):
+    stat = os.stat(path)
+    if stat[0] == 0x8000:
+        os.remove(path)
+    elif stat[0] == 0x4000:
+        for entry in os.ilistdir(path):
+            entry_path = path + '/' + entry[0]
+            recursive_delete(entry_path)
+        os.rmdir(path)
+
+
+@webapp.route('/api/v1/audiofiles', methods=['DELETE'])
+async def audiofile_delete(request):
+    if 'location' not in request.args:
+        return 'missing location', 400
+    location = request.args['location']
+    if '..' in location or len(location) == 0:
+        return 'bad location', 400
+    path = fsroot + '/' + request.args['location']
+    recursive_delete(path)
+    return '', 204
+
+
+@webapp.route('/api/v1/reboot/<method>', methods=['POST'])
+async def reboot(request, method):
+    if method == 'bootloader':
+        if hwconfig.get_on_battery():
+            return 'not possible: connect USB first', 403
+        leds.set_state(LedManager.REBOOTING)
+        timer_manager.schedule(time.ticks_ms() + 1500, machine.bootloader)
+    elif method == 'application':
+        leds.set_state(LedManager.REBOOTING)
+        timer_manager.schedule(time.ticks_ms() + 1500, machine.reset)
+    else:
+        return 'method not supported', 400
+    return '', 204
+
+
+@webapp.route('/api/v1/info', methods=['GET'])
+async def get_info(request):
+    mac = ubinascii.hexlify(network.WLAN().config('mac'), ':').decode()
+    return {'version': board.version,
+            'mac': mac}

software/tests/test_playerapp.py

@@ -139,6 +139,12 @@ class FakeConfig:
     def get_tagmode(self):
         return 'tagremains'
 
+    def get_volume_max(self):
+        return 255
+
+    def get_volume_boot(self):
+        return 16
+
 
 def fake_open(filename, mode):
     return FakeFile(filename, mode)
@@ -167,7 +173,7 @@ def test_construct_app(micropythonify, faketimermanager):
     deps = _makedeps(mp3player=fake_mp3)
     dut = app.PlayerApp(deps)
     fake_mp3 = dut.player
-    assert fake_mp3.volume is not None
+    assert fake_mp3.volume is not None and fake_mp3.volume >= 16
 
 
 def test_load_playlist_on_tag(micropythonify, faketimermanager, monkeypatch):

software/tools/standalone-mp3/CMakeLists.txt

@@ -15,6 +15,8 @@ option(ENABLE_PLAY_TEST "Enable mp3 playback test" OFF)
 option(ENABLE_SD_READ_CRC "Enable crc check when reading from sd card" OFF)
 option(ENABLE_SD_DEBUG "Enable debug output for sd card driver" OFF)
 
+set(PICO_USE_FASTEST_SUPPORTED_CLOCK 1)
+
 # initialize the Raspberry Pi Pico SDK
 pico_sdk_init()
 
@@ -62,7 +64,7 @@ add_subdirectory(../../lib/helix_mp3 helix_mp3)
 
 target_link_libraries(standalone_mp3 PRIVATE pico_stdlib hardware_dma hardware_spi hardware_sync hardware_pio helix_mp3)
 target_include_directories(standalone_mp3 PRIVATE ${SD_LIB_DIR})
-target_compile_options(standalone_mp3 PRIVATE -Og -DSD_DEBUG)
+target_compile_options(standalone_mp3 PRIVATE -Og)
 
 
 pico_add_extra_outputs(standalone_mp3)

software/tools/standalone-mp3/main.c

@@ -2,6 +2,7 @@
 #include "sd.h"
 
 #include <math.h>
+#include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 
@@ -20,6 +21,14 @@ extern void sd_spi_dbg_clk(const int div, const int frac);
 
 extern void sd_spi_dbg_loop(void);
 
+void sd_printf(const char *fmt, ...)
+{
+    va_list ap;
+    va_start(ap, fmt);
+    vprintf(fmt, ap);
+    va_end(ap);
+}
+
 #define MAX_VOLUME 0x8000u
 
 void __time_critical_func(volume_adjust)(int16_t *restrict buf, size_t samples, uint16_t scalef)
@@ -157,7 +166,7 @@ static void write_test(struct sd_context *sd_context)
             data_buffer[i] ^= 0xff;
         }
 
-        if (!sd_writeblock(sd_context, 0, data_buffer)) {
+        if (!sd_writeblocks(sd_context, 0, sizeof(data_buffer) / SD_SECTOR_SIZE, data_buffer)) {
             printf("sd_writeblock failed\n");
             return;
         }