/**
* Enters the boot loader.
*/
static void enterBootloader()
{
/* Invalidate the checksum in flash */
flashChecksum = FLASH_CHECKSUM ^ 0xff;
writeFlashChecksum();
/* Enable the watchdog and enter an endless loop. This will reboot
the device */
cli();
wdt_enable(WDTO_500MS);
while (1);
}
/**
* Main program.
*/
int main()
{
uchar i, errorCode;
uint8_t oldRunning = 0, running;
/* Disable the watchdog */
MCUSR = 0;
wdt_disable();
/* Read the serial number from flash */
readSerial();
/* Read the flash checksum from EEPROM */
readFlashChecksum();
/* Initialize USB and enable global interrupts */
initUSB();
/* First initialize the PWM so all LEDs are off. */
pwmInit(prescalingIndex);
pwmSet(CHANNEL0, 0, 0);
pwmSet(CHANNEL1, 0, 0);
pwmSet(CHANNEL2, 0, 0);
pwmSet(CHANNEL3, 0, 0);
pwmSet(CHANNEL4, 0, 0);
pwmSet(CHANNEL5, 0, 0);
/* Initialize the blinks memory from eeprom */
eeprom_busy_wait();
eeprom_read_block(memory, (uint8_t*) 1, BLINKS_MEM_SIZE);
/* Make sure bits 7 is cleared and bit 6 is set */
memory[0] &= 0x7f;
memory[0] |= 0x40;
/* Initialize blinks */
blinksScript.data = BLINKS_SCRIPT(memory);
blinksScript.size = BLINKS_SCRIPT_SIZE;
errorCode = 1;
/* Infinite program loop */
i = 0;
uint16_t shutdown = 0;
while ((memory[0] & 0x40) || (--shutdown))
{
/* Re-init PWM if needed */
if (prescalingIndex != getPrescalingIndex())
{
prescalingIndex = getPrescalingIndex();
pwmInit(prescalingIndex);
}
/* Process USB events */
usbPoll();
/* Execute special commands */
switch (command)
{
case CMD_SAVE:
eeprom_busy_wait();
eeprom_write_block(memory, (uint8_t*) 1, BLINKS_MEM_SIZE);
break;
}
command = 0;
/* Reset script when running flag has changed or an error occurred */
running = BLINKS_FLAGS(memory) & BLINKS_FLAG_RUNNING;
if (running != oldRunning || errorCode)
{
errorCode = blinksReset(blinksScript);
oldRunning = running;
}
/* Execute next step in program when program is running an no error
occurred. */
if (running && !errorCode)
errorCode = blinksStep(blinksScript);
/* Apply channel values */
if (!errorCode)
{
unsigned char outputs = blinksCountOutputs(blinksScript);
unsigned char invert = isInverted();
if (outputs > 0) pwmSet(CHANNEL0, blinksGetOutput(blinksScript, 0), invert);
if (outputs > 1) pwmSet(CHANNEL1, blinksGetOutput(blinksScript, 1), invert);
if (outputs > 2) pwmSet(CHANNEL2, blinksGetOutput(blinksScript, 2), invert);
if (outputs > 3) pwmSet(CHANNEL3, blinksGetOutput(blinksScript, 3), invert);
if (outputs > 4) pwmSet(CHANNEL4, blinksGetOutput(blinksScript, 4), invert);
if (outputs > 5) pwmSet(CHANNEL5, blinksGetOutput(blinksScript, 5), invert);
}
/* When this loop has been executed for 100 times then
mark the flash as OK */
if ((flashChecksum != FLASH_CHECKSUM) && (i < 100))
{
i++;
if (i == 100)
{
flashChecksum = FLASH_CHECKSUM;
writeFlashChecksum();
}
}
}
enterBootloader();
return 0;
}
/**
* Main program.
*/
int main()
{
uchar i;
/* Disable the watchdog */
MCUSR = 0;
wdt_disable();
/* Read the flash checksum from EEPROM */
readFlashChecksum();
/* Initialize USB and enable global interrupts */
initUSB();
/* First initialize the PWM so all LEDs are off. */
pwmInit(0);
pwmSet(CHANNEL0, 0, 0);
pwmSet(CHANNEL1, 0, 0);
pwmSet(CHANNEL2, 255, 0);
pwmSet(CHANNEL3, 0, 0);
pwmSet(CHANNEL4, 0, 0);
pwmSet(CHANNEL5, 0, 0);
/* Initialize the blinks memory from eeprom */
eeprom_busy_wait();
eeprom_read_block(memory, (uint8_t*) 1, MEM_SIZE);
/* Make sure bits 7 is cleared and bit 6 is set */
memory[0] &= 0x7f;
memory[0] |= 0x40;
/* Infinite program loop */
i = 0;
while (memory[0] & 0x40)
{
restart = 50;
while (restart)
{
/* Process USB events */
usbPoll();
int len = buffer_write_index - buffer_read_index;
if (len > 0 && usbInterruptIsReady())
{
if (len > 8) len = 8;
usbSetInterrupt(&buffer[buffer_read_index], len);
buffer_read_index += len;
to_read -= len;
if (!to_read)
{
buffer_read_index = 0;
buffer_write_index = 0;
}
}
if (restart < 50) restart--;
/* When this loop has been executed for 100 times then
mark the flash as OK */
if ((flashChecksum != FLASH_CHECKSUM) && (i < 100))
{
i++;
if (i == 100)
{
flashChecksum = FLASH_CHECKSUM;
writeFlashChecksum();
}
}
}
reenumerate(500);
}
enterBootloader();
return 0;
}
