void FLASH_command(uint8_t cmd, uint8_t isWrite){
if (isWrite)
{
FLASH_command(SPIFLASH_WRITEENABLE, 0); // Write Enable
FLASH_UNSELECT;
}
while(FLASH_busy()); //wait for chip to become available
FLASH_SELECT;
SPI_transfer(cmd);
}
uint8_t FLASH_readByte(uint32_t addr) {
FLASH_command(SPIFLASH_ARRAYREADLOWFREQ, 0);
SPI_transfer(addr >> 16);
SPI_transfer(addr >> 8);
SPI_transfer(addr);
//SPI.transfer(0); //"dont care", needed with SPIFLASH_ARRAYREAD command only
uint8_t result = SPI_transfer(0);
FLASH_UNSELECT;
return result;
}
void CheckFlashImage() {
#ifdef DEBUG_ON
putch('F');
#endif
watchdogConfig(WATCHDOG_OFF);
#ifdef ANARDUINO
#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__) || defined(__AVR_ATmega88) || defined(__AVR_ATmega8__) || defined(__AVR_ATmega88__)
DDRB |= _BV(SS) | _BV(PINB3) | _BV(PINB5); //OUTPUTS for SS, MOSI, SCK
DDRD |= _BV(FLASHSS); //OUTPUTS for FLASH_SS
FLASH_UNSELECT; //unselect FLASH chip
PORTB |= _BV(SS); //set SS HIGH
#elif defined (__AVR_ATmega1284P__) || defined (__AVR_ATmega644P__)
DDRC |= _BV(FLASHSS); //OUTPUT for FLASH_SS
DDRB |= _BV(SS) | _BV(PB5) | _BV(PB7); //OUTPUTS for SS, MOSI, SCK
FLASH_UNSELECT; //unselect FLASH chip
PORTB |= _BV(SS); //set SS HIGH
#endif
#else //MOTEINO
//SPI INIT
#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__) || defined(__AVR_ATmega88) || defined(__AVR_ATmega8__) || defined(__AVR_ATmega88__)
DDRB |= _BV(FLASHSS) | _BV(SS) | _BV(PINB3) | _BV(PINB5); //OUTPUTS for FLASH_SS and SS, MOSI, SCK
FLASH_UNSELECT; //unselect FLASH chip
PORTB |= _BV(SS); //set SS HIGH
#elif defined (__AVR_ATmega1284P__) || defined (__AVR_ATmega644P__)
DDRC |= _BV(FLASHSS); //OUTPUT for FLASH_SS
DDRB |= _BV(SS) | _BV(PB5) | _BV(PB7); //OUTPUTS for SS, MOSI, SCK
FLASH_UNSELECT; //unselect FLASH chip
PORTB |= _BV(SS); //set SS HIGH
#endif
#endif // MOTEINO*/
//SPCR &= ~(_BV(DORD)); //MSB first
//SPCR = (SPCR & ~SPI_MODE_MASK) | SPI_MODE0 ; //SPI MODE 0
//SPCR = (SPCR & ~SPI_CLOCK_MASK) | (SPI_CLOCK_DIV2 & SPI_CLOCK_MASK); //clock divider = 2
//SPSR = (SPSR & ~SPI_2XCLOCK_MASK) | ((SPI_CLOCK_DIV2 >> 2) & SPI_2XCLOCK_MASK);
// Warning: if the SS pin ever becomes a LOW INPUT then SPI automatically switches to Slave, so the data direction of the SS pin MUST be kept as OUTPUT.
SPCR |= _BV(MSTR) | _BV(SPE); //enable SPI and set SPI to MASTER mode
//read first byte of JEDECID, if chip is present it should return a non-0 and non-FF value
//FLASH_SELECT;
FLASH_command(SPIFLASH_JEDECID,1);
uint8_t deviceId = SPI_transfer(0);
FLASH_UNSELECT;
#ifdef DEBUG_ON
putch(deviceId);
#endif
// Disabled check, as it only returns 0xFF or 0x00 for some reasons
if (deviceId==0 || deviceId==0xFF) return;
//global unprotect
FLASH_command(SPIFLASH_STATUSWRITE, 1);
SPI_transfer(0);
FLASH_UNSELECT;
#ifdef DEBUG_ON
putch('I');
#endif
//check if any flash image exists on external FLASH chip
if (FLASH_readByte(0)=='F' && FLASH_readByte(1)=='L' && FLASH_readByte(2)=='X' && FLASH_readByte(6)==':' && FLASH_readByte(9)==':')
{
#ifdef DEBUG_ON
putch('L');
#endif
uint16_t imagesize = (FLASH_readByte(7)<<8) | FLASH_readByte(8);
if (imagesize%2!=0) return; //basic check that we got even # of bytes
uint16_t b, i, nextAddress=0;
LED_PIN |= _BV(LED);
for (i=0; i<imagesize; i+=2)
{
#ifdef DEBUG_ON
putch('*');
#endif
//read 2 bytes (16 bits) from flash image, transfer them to page buffer
b = FLASH_readByte(i+10); // flash image starts at position 10 on the external flash memory: FLX:XX:FLASH_IMAGE_BYTES_HERE...... (XX = two size bytes)
b |= FLASH_readByte(i+11) << 8; //bytes are stored big endian on external flash, need to flip the bytes to little endian for transfer to internal flash
__boot_page_fill_short((uint16_t)(void*)i,b);
//when 1 page is full (or we're on the last page), write it to the internal flash memory
if ((i+2)%SPM_PAGESIZE==0 || (i+2==imagesize))
{
__boot_page_erase_short((uint16_t)(void*)nextAddress); //(i+2-SPM_PAGESIZE)
boot_spm_busy_wait();
// Write from programming buffer
__boot_page_write_short((uint16_t)(void*)nextAddress ); //(i+2-SPM_PAGESIZE)
boot_spm_busy_wait();
nextAddress += SPM_PAGESIZE;
}
}
LED_PIN &= ~_BV(LED);
#if defined(RWWSRE)
// Reenable read access to flash
boot_rww_enable();
#endif
#ifdef DEBUG_ON
putch('E');
#endif
#ifdef ANARDUINO
// Anarduino doesn't support 32K block erase. Do it, with 8 pages of 4k each
int page;
long address;
for (page = 0, address=0; page< 8; page++) {
FLASH_command(SPIFLASH_BLOCKERASE_4K, 1);
SPI_transfer(address >> 16);
SPI_transfer(address >> 8);
SPI_transfer(address);
FLASH_UNSELECT;
while (FLASH_busy());
address += 0x1000;
}
#else // MOTEINO
//erase the first 32/64K block where flash image resided (atmega328 should be less than 31K, and atmega1284 can be up to 64K)
if (imagesize+10<=32768) FLASH_command(SPIFLASH_BLOCKERASE_32K, 1);
else FLASH_command(SPIFLASH_BLOCKERASE_64K, 1);
SPI_transfer(0);
SPI_transfer(0);
SPI_transfer(0);
#endif
FLASH_UNSELECT;
//now trigger a watchdog reset
watchdogConfig(WATCHDOG_16MS); // short WDT timeout
while (1); // and busy-loop so that WD causes a reset and app start
}
void CheckFlashImage() {
#ifdef DEBUG_ON
putch('F');
#endif
watchdogConfig(WATCHDOG_OFF);
//SPI INIT
FLASHSS_DDR |= _BV(FLASHSS) | _BV(SS) | _BV(PB3) | _BV(PB5); //OUTPUTS for D8 and D10, MOSI, SCK
FLASH_UNSELECT; //unselect FLASH chip
PINB |= _BV(SS); //set D10 HIGH
//SPCR &= ~(_BV(DORD)); //MSB first
//SPCR = (SPCR & ~SPI_MODE_MASK) | SPI_MODE0 ; //SPI MODE 0
//SPCR = (SPCR & ~SPI_CLOCK_MASK) | (SPI_CLOCK_DIV2 & SPI_CLOCK_MASK); //clock divider = 2
//SPSR = (SPSR & ~SPI_2XCLOCK_MASK) | ((SPI_CLOCK_DIV2 >> 2) & SPI_2XCLOCK_MASK);
// Warning: if the SS pin ever becomes a LOW INPUT then SPI automatically switches to Slave, so the data direction of the SS pin MUST be kept as OUTPUT.
SPCR |= _BV(MSTR) | _BV(SPE); //enable SPI and set SPI to MASTER mode
//read first byte of JEDECID, if chip is present it should return a non-0 and non-FF value
FLASH_SELECT;
SPI_transfer(SPIFLASH_JEDECID);
uint8_t deviceId = SPI_transfer(0);
FLASH_UNSELECT;
if (deviceId==0 || deviceId==0xFF) return;
//global unprotect
FLASH_command(SPIFLASH_STATUSWRITE, 1);
SPI_transfer(0);
FLASH_UNSELECT;
//check if any flash image exists on external FLASH chip
if (FLASH_readByte(0)=='F' && FLASH_readByte(1)=='L' && FLASH_readByte(2)=='X' && FLASH_readByte(6)==':' && FLASH_readByte(9)==':')
{
#ifdef DEBUG_ON
putch('L');
#endif
uint16_t imagesize = (FLASH_readByte(7)<<8) | FLASH_readByte(8);
if (imagesize%2!=0) return; //basic check that we got even # of bytes
uint16_t b, i, nextAddress=0;
LED_PIN |= _BV(LED);
for (i=0; i<imagesize; i+=2)
{
#ifdef DEBUG_ON
putch('*');
#endif
//read 2 bytes (16 bits) from flash image, transfer them to page buffer
b = FLASH_readByte(i+10); // flash image starts at position 10 on the external flash memory: FLX:XX:FLASH_IMAGE_BYTES_HERE...... (XX = two size bytes)
b |= FLASH_readByte(i+11) << 8; //bytes are stored big endian on external flash, need to flip the bytes to little endian for transfer to internal flash
__boot_page_fill_short((uint16_t)(void*)i,b);
//when 1 page is full (or we're on the last page), write it to the internal flash memory
if ((i+2)%SPM_PAGESIZE==0 || (i+2==imagesize))
{
__boot_page_erase_short((uint16_t)(void*)nextAddress); //(i+2-SPM_PAGESIZE)
boot_spm_busy_wait();
// Write from programming buffer
__boot_page_write_short((uint16_t)(void*)nextAddress ); //(i+2-SPM_PAGESIZE)
boot_spm_busy_wait();
nextAddress += SPM_PAGESIZE;
}
}
LED_PIN &= ~_BV(LED);
#if defined(RWWSRE)
// Reenable read access to flash
boot_rww_enable();
#endif
#ifdef DEBUG_ON
putch('E');
#endif
//erase the first 32K block where flash image resided
FLASH_command(SPIFLASH_BLOCKERASE_32K, 1);
SPI_transfer(0);
SPI_transfer(0);
SPI_transfer(0);
FLASH_UNSELECT;
//now trigger a watchdog reset
watchdogConfig(WATCHDOG_16MS); // short WDT timeout
while (1); // and busy-loop so that WD causes a reset and app start
}
#ifdef DEBUG_ON
putch('X');
#endif
}
