Colony » Colony Scout » Colony Scout OS

#include <inttypes.h>

#include <avr/boot.h>

#include <avr/interrupt.h>

#include <avr/pgmspace.h>

#include "tiny-twi-sync.h"

#include "bootloader.h"

uint32_t current_page;

void boot_program_page (uint32_t page, uint8_t *buf)

{

  uint16_t i;

  uint8_t sreg;

  // Disable interrupts.

  sreg = SREG;

  cli();

  eeprom_busy_wait ();

  boot_page_erase (page);

  boot_spm_busy_wait ();      // Wait until the memory is erased.

  for (i=0; i<SPM_PAGESIZE; i+=2)

  {

    // Set up little-endian word.

    uint16_t w = *buf++;

    w += (*buf++) << 8;

    boot_page_fill (page + i, w);

  }

  boot_page_write (page);     // Store buffer in flash page.

  boot_spm_busy_wait();       // Wait until the memory is written.

  // Re-enable interrupts (if they were ever enabled).

  SREG = sreg;

}

static void bom_pgrm(uint8_t *buf, int len) {

  if (len == SPM_PAGESIZE) {

    if (current_page == 0) {

      uint16_t w = 0xC000 | ((START_ADDR >> 1) - 1);

      buf[0] = w & 0xFF;

      buf[1] = (w >> 8) & 0xFF;

    }

    boot_program_page(current_page, buf);

    current_page++;

  }

}

static void slave_rx(uint8_t *buf, int len) {

  if (len >= 1) {

    switch (buf[0]) {

      case BOM_I2C_PGRM:

        bom_pgrm(buf+1, len-1);

        break;

      case BOM_I2C_STRT:

        strt_pgrm(); //yolo

        break;

    }

  }

}

int main() {

  smb_init(slave_rx);

  smb_set_address(3); // TODO parameterize address

  twi_run();

  // TODO timeout

  return 0;

}