Revision 171 trunk/toolbox/bootloader/bootloader.c
| bootloader.c (revision 171) | ||
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| 11 | 11 |
#define ADDR 18 |
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#define MAX_WAIT_IN_CYCLES 800000 |
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#define MAX_TIMEOUT 60000 // Seconds to wait before exiting bootloader mode |
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#define MAX_TIMEOUT 60000 // Seconds to wait before exiting bootloader mode |
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#define MAIN_ADDR 0x000 |
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#define BOOT_START 0x400 |
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| ... | ... | |
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#define LED PORTB1 |
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//Function prototypes |
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void __init(void) __attribute__((naked)); |
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void (*main_start)(void) = BOOT_START/2 - 1; |
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void (*main_start)(void) = BOOT_START/2 - 1; |
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// Packet handler states |
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typedef enum {
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sd, |
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src, |
| ... | ... | |
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int16_t sword; |
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} rjump_t; |
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// Redirect all unused interrupts to reti |
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//EMPTY_INTERRUPT(__vector_default); |
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//extern void __ctors_end(void) __attribute__((__noreturn__)); |
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// macros for entering subprograms |
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//#define __JMP_INIT__ __asm__ __volatile__ ("rjmp __ctors_end" )
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/*BOOTLOADER_SECTION*/ void init_uart(uint16_t baud) {
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void init_uart(uint16_t baud) {
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// Set baud rate |
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UBRRH = (uint8_t)(baud>>8); |
| 54 | 45 |
UBRRL = (uint8_t)baud; |
| ... | ... | |
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uart_toggle_transmit(UART_TX_OFF); |
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} |
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/*BOOTLOADER_SECTION*/ int8_t uart_get_byte(uint8_t *output_byte) {
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int8_t uart_get_byte(uint8_t *output_byte) {
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if (UCSRA & _BV(RXC)) {
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*output_byte = UDR; |
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return 0; |
| ... | ... | |
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} |
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} |
| 72 | 63 |
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/*BOOTLOADER_SECTION*/ void uart_send_byte(uint8_t data) {
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void uart_send_byte(uint8_t data) {
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//Waits until current transmit is done |
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while (!(UCSRA & _BV(UDRE))); |
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//PORTB |= _BV(PORTB2); |
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// Enable writes and send |
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uart_toggle_transmit(UART_TX_ON); |
| ... | ... | |
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uart_toggle_transmit(UART_TX_OFF); |
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UCSRA |= _BV(TXC); |
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//PORTB |= _BV(PORTB1); |
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return; |
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} |
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/*BOOTLOADER_SECTION*/ void uart_toggle_transmit(uint8_t state) {
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void uart_toggle_transmit(uint8_t state) {
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if (state == UART_TX_ON) {
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PORTD |= TX_EN; |
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} else {
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| ... | ... | |
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} |
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} |
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/*BOOTLOADER_SECTION*/ char parse_packet(uint8_t *mbuf) {
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char parse_packet(uint8_t *mbuf) {
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uint8_t r; // Byte from the network |
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uint8_t crc; // Running checksum of the packet |
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uint8_t cmd; // The command received |
| ... | ... | |
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while ((uart_get_byte(&r)) < 0) {
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if (count >= MAX_TIMEOUT) {
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return TT_BAD; |
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} |
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} else {
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count++; |
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} |
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} |
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switch (state) {
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| ... | ... | |
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} |
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} |
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/*BOOTLOADER_SECTION*/ void send_packet(uint8_t cmd) {
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void send_packet(uint8_t cmd) {
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uart_send_byte(DELIM); |
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uart_send_byte(ADDR); |
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uart_send_byte(SERVER); |
| ... | ... | |
| 201 | 190 |
uart_send_byte(ACK_CRC ^ cmd); |
| 202 | 191 |
} |
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//#define SPM_PAGESIZE 32 |
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/*BOOTLOADER_SECTION*/ void onboard_program_write(uint16_t page, uint8_t *buf) {
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// SPM_PAGESIZE is set to 32 bytes |
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void onboard_program_write(uint16_t page, uint8_t *buf) {
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uint16_t i; |
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boot_page_erase (page); |
| ... | ... | |
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boot_spm_busy_wait(); // Wait until the memory is written. |
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} |
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/*BOOTLOADER_SECTION*/ int main(void) {
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int main(void) {
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uint8_t mbuf[PROGD_PACKET_SIZE]; |
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rjump_t jbuf; |
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uint16_t caddr = MAIN_ADDR; |
| ... | ... | |
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mbuf[0] = (BOOT_START/2 - 1) & 0xFF; |
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mbuf[1] = 0xC0 | (((BOOT_START/2 - 1) >> 8) & 0x0F); |
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//memcpy_P(mbuf, (PGM_VOID_P)MAIN_ADDR, 2); |
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//mbuf[0] = pgm_read_byte(MAIN_ADDR); |
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//mbuf[1] = pgm_read_byte(MAIN_ADDR + 1); |
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//PORTB &= ~_BV(PORTB0); |
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//while(1); |
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iteration = 1; |
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} /*else {
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PORTB &= ~_BV(PORTB1); |
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while(1); |
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}*/ |
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} |
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onboard_program_write(caddr, mbuf); |
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caddr += PROGD_PACKET_SIZE; |
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} else {
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| ... | ... | |
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prog_len -= PROGD_PACKET_SIZE; |
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} |
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} |
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// Should never get here |
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return -1; |
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} |
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/* |
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int main (void) {
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while(1); |
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}*/ |
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