Matthias Blankertz
7f8282315e
All checks were successful
Build RPi Pico firmware image / Build-Firmware (push) Successful in 5m29s
Check code formatting / Check-C-Format (push) Successful in 9s
Check code formatting / Check-Python-Flake8 (push) Successful in 9s
Check code formatting / Check-Bash-Shellcheck (push) Successful in 4s
Run unit tests on host / Run-Unit-Tests (push) Successful in 8s
The python and C modules that are supposed to be built into the firmware image (i.e. those that are in manifest.py or in USER_C_MODULES) have been moved to the software/modules directory. The software/src directory should now only contain python scripts and other files that should be installed to the Picos flash filesystem. The idea is that these should be those scripts that implement the application behaviour, as these are the ones that a user who does not want to build the whole firmware themself wants to modify.
62 lines
1.9 KiB
Plaintext
62 lines
1.9 KiB
Plaintext
// SPDX-License-Identifier: MIT
|
|
// Copyright (c) 2024 Matthias Blankertz <matthias@blankertz.org>
|
|
|
|
.program sd_spi_pio
|
|
.side_set 1
|
|
|
|
// data - MISO MOSI
|
|
// sideset - SCK
|
|
|
|
// normal SPI
|
|
normal:
|
|
.wrap_target
|
|
out pins, 1 side 0 [1]
|
|
in pins, 1 side 1 [1]
|
|
.wrap
|
|
// Special "wait for token" repeated read SPI
|
|
wait_loop:
|
|
pull block side 0 [0]
|
|
mov osr, x side 0 [0]
|
|
set y, 8 side 0 [0]
|
|
read_loop:
|
|
out pins, 1 side 0 [1]
|
|
in pins, 1 side 1 [0]
|
|
jmp y--, read_loop side 1 [0]
|
|
mov isr, y side 0 [0]
|
|
jmp x != y, wait_done side 0 [0]
|
|
set y, 0 side 0 [0]
|
|
mov y, isr side 0 [0]
|
|
jmp wait_loop side 0 [0]
|
|
wait_done:
|
|
push block side 0 [0]
|
|
jmp normal side 0 [0]
|
|
|
|
% c-sdk {
|
|
#include "hardware/clocks.h"
|
|
|
|
#include <stdio.h>
|
|
#include <math.h>
|
|
|
|
static inline void sd_spi_pio_program_init(PIO pio, uint sm, uint offset, uint mosi, uint miso, uint sck, uint bitrate) {
|
|
pio_gpio_init(pio, mosi);
|
|
pio_gpio_init(pio, miso);
|
|
pio_gpio_init(pio, sck);
|
|
pio_sm_set_consecutive_pindirs(pio, sm, mosi, 1, true);
|
|
pio_sm_set_consecutive_pindirs(pio, sm, miso, 1, false);
|
|
pio_sm_set_consecutive_pindirs(pio, sm, sck, 1, true);
|
|
|
|
pio_sm_config c = sd_spi_pio_program_get_default_config(offset);
|
|
sm_config_set_out_pins(&c, mosi, 1);
|
|
sm_config_set_in_pins(&c, miso);
|
|
sm_config_set_sideset_pins(&c, sck);
|
|
sm_config_set_out_shift(&c, false, true, 8);
|
|
sm_config_set_in_shift(&c, false, true, 8);
|
|
|
|
const unsigned pio_freq = bitrate*4;
|
|
const float div = clock_get_hz(clk_sys) / (float)pio_freq;
|
|
// for some reason, small clkdiv values (even integer ones) cause issues
|
|
sm_config_set_clkdiv(&c, div < 2.5f ? 2.5f : div);
|
|
pio_sm_init(pio, sm, offset, &c);
|
|
}
|
|
%}
|