#define FLASH_TOOL_MODE

#define MAX_PKT_SIZE 32

#define SEQN

static void flasher_setup(void);

static void flasher_rx_handle(void);

static void flasher_tx_handle(void);

#include "passthrough.c"

static void flasher_setup(void) {

}

static uint32_t prev_txrx_ts = 0;

static void flasher_rx_handle(void) {

prev_txrx_ts = timer_read();

}

static void flasher_tx_handle(void) {

static uint8_t first_tx = 1;

/*

* If more than a second has passed since previous communication

* the bootloader will have left the flash mode by now so this is

* probably a new boot and a new flashing attempt.

*/

if ((uint32_t) (timer_read() - prev_txrx_ts) > F_CPU)

first_tx = 1;

/*

* Before any actual STK500v2 communication begins we need to

* attempt to reset the board to start the bootloader, and send it

* our radio address to return the ACK packets to.

*/

if (first_tx) {

uint8_t ch, pkt[4];

/*

* Our protocol requires any program running on the board

* to reset it if it receives a 0xff byte.

*/

ch = 0xff;

nrf24_tx(&ch, 1);

nrf24_tx_result_wait();

/* Give the board time to reboot and enter the bootloader */

my_delay(100);

/* Finally send our address + pkt size as a separate packet */

pkt[0] = eeprom_read(0);

pkt[1] = eeprom_read(1);

pkt[2] = eeprom_read(2);

pkt[3] = MAX_PKT_SIZE;

/* TODO: set the no-ACK bit, the remote board can't ACK yet */

nrf24_tx(pkt, 4);

nrf24_tx_result_wait();

first_tx = 0;

}

prev_txrx_ts = timer_read();

}