static bool hex_load(const char *file, long firmsize, uint8_t *image)
{
FILE *f;
char s[0x80];
f = fopen(file, "r");
if(f == NULL){
return false;
}
fseek(f, 0, SEEK_SET);
struct record *t = ihex_new();
bool ret = true;
while(fgets(s, 0x80, f) != NULL){
if(ihex_load(s, t) == false){
ret = false;
break;
}
ihex_write(t, firmsize, image);
}
ihex_destory(t);
return ret;
}
/*--- MAIN -------------------------------------------------------------------*/
int main(void)
{
char temp_char;
uint16_t loop = 1;
uint8_t bootFlag = TRUE;
cli();
/* the following code moves the interrupt vector pointer to the bootloader
section. The problem is the compiler doesn't understand where to put
the IV table. */
GICR = _BV(IVCE);
GICR |= _BV(IVSEL); //move interruptvectors to the Boot sector
/* The slow baud rate is required because of the intel hex parsing overhead.
If I could figure out how to enable interrupts in the BLS (compiler issue)
then a higher speed could be used by switching to an interrupt based
UART ISR. The code could also be optimized. */
SerCom0Init(BAUD_2400); // NOTE, the baud rates are constants defined in
// sercom.h. You need to adjust those constants
// to fit your MCU speed
// poll USART receive complete flag 64k times to catch the 'i' reliably
// test if flash is empty (i.e. flash content is 0xff)
if(pgm_read_byte_near(0x0000) != 0xFF) {
bootFlag = FALSE;
}
do {
if(bit_is_set( UCSRA, RXC))
if( UDR == 'i')
{ bootFlag = TRUE;
PutString0("Boot V ");
PutChar0(VER_HIGH_BYTE);
PutChar0(VER_LOW_BYTE);
PutString0("\r\n");
}
} while(loop++);
/* this main loop is the user 'menu'. */
while(bootFlag)
{
if( Hit0() ) // more necessary for UART code running interrupts
{
temp_char=GetChar0();
switch(temp_char)
{
case 'u': // download new program
{
/* erase the main flash excepting BLS */
buf_address = 0;
while ( APP_END > buf_address )
{
boot_page_erase(buf_address); // Perform page erase
boot_spm_busy_wait(); // Wait until the memory is erased.
buf_address += SPM_PAGESIZE;
}
buf_address = 0;
/* load new program */
PutString0("READY");
if(( temp_char = ihex_load()))
{
PutString0("ERR ");
PutInt0(temp_char);
}
else
{( PutString0("OK") );
bootFlag = FALSE ; // Exit to run
}
}
break;
case 'x': //Exit upgrade
{
GICR = _BV(IVCE);
GICR &= ~_BV(IVSEL); //move interruptvectors to the Application sector
jump_to_app(); // Jump to application sector
// wdt_enable(WDTO_15MS); // Enable Watchdog Timer to give reset
}
break;
default:
{
PutString0("u - Upload or x - Execute\r\n");
}
} // end switch
} // end if( Hit0() )
} // end while(1)
// Start to application
GICR = _BV(IVCE);
GICR &= ~_BV(IVSEL); //move interruptvectors to the Application sector
jump_to_app(); // Jump to application sector
return 0;
}
/*--- MAIN -------------------------------------------------------------------*/
int main(void)
{
uint8_t temp_char,tmp;
uint8_t bootFlag = TRUE;
cli();
/* the following code moves the interrupt vector pointer to the bootloader
section. The problem is the compiler doesn't understand where to put
the IV table. */
GICR = _BV(IVCE);
GICR = _BV(IVSEL); //move interruptvectors to the Boot sector ** WRITE 0 TO IVCE use = not |
// Initial 7 Segments on E_io
// Set direction of two switch to Input
DDRB = 0xFF; // Output
DDRC = 0x18; // P3, P4 for Control 7 segments Digits
// Enable pull up resistor
PORTC |= 0x24;
/* The slow baud rate is required because of the intel hex parsing overhead.
If I could figure out how to enable interrupts in the BLS (compiler issue)
then a higher speed could be used by switching to an interrupt based
UART ISR. The code could also be optimized. */
uart_init( UART_INTERRUPT,UART_8_N_1,UART_38400);
// poll USART receive complete flag 64k times to catch the 'i' reliably
// test if flash is empty (i.e. flash content is 0xff)
if(pgm_read_byte_near(0x0000) != 0xFF) {
bootFlag = FALSE;
}
// Enter boot mode by press b
// while (!(tmp = uart_read()));
// if (tmp == 'b')
// bootFlag = TRUE;
// Check SW for enter boot mode either press both SW at the same time
tmp = PINC & (0x24); // PB0, PB3 port
if (!tmp) // Press SW tmp = 0
bootFlag = TRUE;
uart_write_str (VERSION);
// Display b characters
E_OUT_PORTA = 0x7C; // b
E_OUT_PB1(0);
E_OUT_PB2(1);
/* this main loop is the user 'menu'. */
while(bootFlag)
{
if( (tmp = uart_read()) )
{
switch(tmp)
{
case 'u': // download new program
{
/* erase the main flash excepting BLS */
buf_address = 0;
while ( APP_END > buf_address )
{
boot_page_erase(buf_address); // Perform page erase
boot_spm_busy_wait(); // Wait until the memory is erased.
buf_address += SPM_PAGESIZE;
}
buf_address = 0;
/* load new program */
uart_write_str("READY \n");
if(( temp_char = ihex_load()))
{
uart_write_str("ERR ");
uart_write_char(temp_char + '0' );
uart_write_char('\n');
}
else
{
bootFlag = FALSE ; // Exit to run
}
}
break;
case 'x': //Exit upgrade
{
GICR = _BV(IVCE);
GICR &= ~(_BV(IVSEL) | _BV(IVCE)); //move interruptvectors to the Application sector Write 0 to IVCE
jump_to_app(); // Jump to application sector
// wdt_enable(WDTO_15MS); // Enable Watchdog Timer to give reset
}
break;
default:
{
uart_write_str(" u - Upload or x - Execute \n");
}
} // end switch
}
} // end while(1)
// Start to application
GICR = _BV(IVCE);
GICR &= ~(_BV(IVSEL) | _BV(IVCE)); //move interruptvectors to the Application sector Write 0 to IVCE
jump_to_app(); // Jump to application sector
return 0;
}
