Revision 199
Bootloader is setup to read the address from the EEPROM now
| bootloader.c | ||
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}; |
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*/ |
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// Error thresholds |
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#define MAX_RETRIES 5 // Number of times to retry before giving up |
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| ... | ... | |
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uint16_t prog_len; |
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uint8_t i; |
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uint8_t retries; |
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uint8_t addr; |
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retry_jpnt: |
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iteration = 0; |
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retries = 0; |
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addr = eeprom_read_byte(EEPROM_ADDR); |
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// Clear the watchdog timer |
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MCUSR &= ~_BV(WDRF); |
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wdt_disable(); |
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WDTCSR = 0; |
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rs485_init(BAUD9600); |
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//set LED pin as output |
| ... | ... | |
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PORTB = 0x07; |
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//Start bootloading process |
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send_packet(TT_BOOT); |
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send_packet(TT_BOOT, addr);
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resp = parse_packet(mbuf); |
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resp = parse_packet(mbuf, addr);
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// Enter programming mode |
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if (resp == TT_PROGM) {
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| ... | ... | |
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main_start(); |
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} |
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send_packet(TT_ACK); |
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send_packet(TT_ACK, addr);
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while(1) {
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resp = parse_packet(mbuf); |
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resp = parse_packet(mbuf, addr);
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if (resp == TT_PROGD) {
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// We need to muck with the reset vector jump in the first page |
| ... | ... | |
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caddr += PROGD_PACKET_SIZE; |
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retries = 0; |
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} else {
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send_packet(TT_NACK); |
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send_packet(TT_NACK, addr);
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retries++; |
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// If we failed too many times, reset. This goes to the start |
| ... | ... | |
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} |
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} |
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send_packet(TT_ACK); |
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send_packet(TT_ACK, addr);
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// Once we write the last packet we must override the jump to |
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// user code to point to the correct address |
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