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Import initial AVR firmware files

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This commit is contained in:
Matthias Blankertz
2015-06-19 10:34:17 +02:00
parent 67529d3482
commit d13d5e7ad1
10 changed files with 245 additions and 0 deletions
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3
avr_firmware/.gitignore vendored Normal file
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*~
objs/
fw.elf

20
avr_firmware/Makefile Normal file
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CC=avr-gcc
CCOPTS=-mmcu=atmega164a -std=c11 -flto -Os -ggdb
CCSRCS ::= uart.c ppp.c main.c modem.c
all: fw.elf
fw.elf: $(addprefix objs/,$(CCSRCS:.c=.o))
$(CC) $(CCOPTS) -o $@ $^
objs/%.o: src/%.c
$(CC) $(CCOPTS) -c -MMD -MP -o $@ $<
@cp objs/$*.d objs/$*.P; rm -f objs/$*.d
clean:
rm -f fw.elf\
$(addprefix objs/,$(CCSRCS:.c=.o))\
$(addprefix objs/,$(CCSRCS:.c=.P))
-include $(addprefix objs/,$(CCSRCS:.c=.P))

8
avr_firmware/src/config.h Normal file
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#define UART0_CTS_PORT PINA
#define UART0_CTS 0
#define GSM_UART_XMIT(x) uart0Xmit((x))
#define GSM_UART_XMIT_STR(x) uart0XmitStr((x))
#define GSM_UART_XMIT_STR_P(x) uart0XmitStr_P((x))
#define GSM_UART_READLINE(x, y) uart0Readline((x), (y))

8
avr_firmware/src/main.c Normal file
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#include "modem.h"
#include "ppp.h"
int main()
{
modemInit();
xmitPPP("TEST", 4);
}

25
avr_firmware/src/modem.c Normal file
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#include <stdbool.h>
#include <avr/pgmspace.h>
#include "config.h"
#include "uart.h"
#define BUFLEN 16
static char buf[BUFLEN];
static bool _expectResponse_P(char const* str, size_t len)
{
return ((GSM_UART_READLINE(buf, BUFLEN) == len) &&
memcmp_P(buf, str, len) != 0);
}
int modemInit()
{
GSM_UART_XMIT_STR_P(PSTR("AT\r"));
if (!_expectResponse_P(PSTR("\r\n"), 2))
return 1;
if (!_expectResponse_P(PSTR("OK\r\n"), 4))
return 1;
}

6
avr_firmware/src/modem.h Normal file
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#ifndef DMXGSM_AVR_MODEM_H
#define DMXGSM_AVR_MODEM_H
int modemInit();
#endif

100
avr_firmware/src/ppp.c Normal file
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#include <stdint.h>
#include <avr/pgmspace.h>
#include "config.h"
#include "uart.h"
#include "ppp.h"
#define PPP_HDLC_FLAG 0x7e
#define PPP_HDLC_ESCAPE 0x7d
static const uint16_t fcstab[256] PROGMEM = {
0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};
#define PPP_INIT_FCS16 0xffff /* Initial FCS value */
#define PPP_GOOD_FCS16 0xf0b8 /* Good final FCS value */
static uint16_t _calcPPPfcs(uint16_t fcs, unsigned char data)
{
return (fcs >> 8) ^ pgm_read_word(&fcstab[(fcs ^ data) & 0xff]);
}
static void _xmitPPPescape(unsigned char data)
{
if ((data < 0x20) ||
(data == PPP_HDLC_FLAG) ||
(data == PPP_HDLC_ESCAPE)) {
GSM_UART_XMIT(PPP_HDLC_ESCAPE);
GSM_UART_XMIT(data ^ 0x20);
} else {
GSM_UART_XMIT(data);
}
}
void xmitPPP(unsigned char const* data, size_t len)
{
uint16_t fcs = PPP_INIT_FCS16;
GSM_UART_XMIT(PPP_HDLC_FLAG);
GSM_UART_XMIT(0xff);
fcs = _calcPPPfcs(fcs, 0xff);
GSM_UART_XMIT(PPP_HDLC_ESCAPE);
GSM_UART_XMIT(0x23);
fcs = _calcPPPfcs(fcs, 0x03);
for (size_t i = 0;i < len;++i) {
_xmitPPPescape(data[i]);
fcs = _calcPPPfcs(fcs, data[i]);
}
_xmitPPPescape(fcs&0xff);
_xmitPPPescape(fcs>>8);
GSM_UART_XMIT(PPP_HDLC_FLAG);
}
void xmitPPPACFC(unsigned char const* data, size_t len)
{
uint16_t fcs = PPP_INIT_FCS16;
GSM_UART_XMIT(PPP_HDLC_FLAG);
for (size_t i = 0;i < len;++i) {
_xmitPPPescape(data[i]);
fcs = _calcPPPfcs(fcs, data[i]);
}
_xmitPPPescape(fcs&0xff);
_xmitPPPescape(fcs>>8);
GSM_UART_XMIT(PPP_HDLC_FLAG);
}

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avr_firmware/src/ppp.h Normal file
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#ifndef DMXGSM_AVR_PPP_H
#define DMXGSM_AVR_PPP_H
#include <stddef.h>
void xmitPPP(unsigned char const* data, size_t len);
#endif

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avr_firmware/src/uart.c Normal file
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#include <avr/io.h>
#include <avr/pgmspace.h>
#include "config.h"
#include "uart.h"
void uart0Xmit(unsigned char data)
{
// Wait for free send buffer
while (!(UCSR0A & (_BV(UDRE0))));
// Wait for CTS
while (UART0_CTS_PORT & (_BV(UART0_CTS)));
// Send data
UDR0 = data;
}
void uart0XmitStr(char const *data)
{
char c;
while (c = *data++)
uart0Xmit((unsigned char)c);
}
void uart0XmitStr_P(char const *data)
{
char c;
while (c = pgm_read_byte(data++))
uart0Xmit((unsigned char)c);
}
unsigned char uart0Recv()
{
// Wait for received
while (!(UCSR0A & (_BV(RXC0))));
return UDR0;
}
int uart0Readline(char *buf, size_t len)
{
char c;
size_t pos = 0;
while (pos < len-1) {
c = uart0Recv();
buf[pos++] = c;
if (c == '\n')
break;
}
buf[pos] = '\0';
return pos;
}

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avr_firmware/src/uart.h Normal file
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#ifndef DMXGSM_AVR_UART_H
#define DMXGSM_AVR_UART_H
#include <stddef.h>
void uart0Xmit(unsigned char data);
void uart0XmitStr(char const *data);
void uart0XmitStr_P(char const *data);
int uart0Readline(char *buf, size_t len);
#endif