//------------------------------------------------------------------------------
// @fn main
//!
//! Core of "main_can_boot_loader.c".
//!
//! @brief: This application performs a CAN boot loader for AT90CAN128/64/32
//! with aut-bitrate, IAP (In Application Programming) and API
//! (Application Programming Interface).
//!
//! @warning: Don't forget to full locate the boot loader in "Boot Loader
//! Flash Section".
//! xxx_HWCB defined in "board.h" file
//!
//! @param none.
//!
//! @return Integer 0
//!
//------------------------------------------------------------------------------
int main (void)
{
U8 u8_temp;
U8 hwcb = FALSE;
Bool auto_b = 1;
//! --- First of all, disabling the Global Interrupt
Disable_interrupt();
//turn off LED
DDRG |= _BV(PING0);
DDRG |= _BV(PING1);
PORTG |= _BV(PING0);
PORTG |= _BV(PING1);
//! --- If comming from RESET then test of the HardWare Condition Bit
if (MCUSR != 0)
{
//- Clear all reset flags
MCUSR = 0;
//- Get HWCB (HardWare Condition Bit)
DDRG &= ~_BV(PING0); // HWCB pin in input
PORTG |= _BV(PING0); // Pull-up on HWCB
hwcb = PING & _BV(PING0);
DDRG |= _BV(PING0);
//DEG check EEPROM for bootloader flag, and read bootloader configuration from there.
//- Start application else start boot loader
//check if alias is in EEPROM
U16 alias;
alias = (eeprom_rd_byte(0x0FF6)) << 8;
alias |= eeprom_rd_byte(0x0FF7);
if(alias != 0x0000)
{
if(alias != 0xFFFF)
{
put_conf_byte(NNB, (U8)(alias & 0x0F));
put_conf_byte(CRIS, (U8)((alias >> 4) & 0xFF));
}
//else, just use the default values, that's fine.
hwcb = 0; //force reboot into bootloader
}
//******************************************************************************
// @fn main
//!
//! Core of "main_can_boot_loader.c".
//!
//! @brief: This application performs a CAN boot loader for AT90CAN128/64/32
//! with aut-bitrate, IAP (In Application Programming) and API
//! (Application Programming Interface).
//!
//! @warning: Don't forget to full locate the boot loader in "Boot Loader
//! Flash Section".
//! xxx_HWCB defined in "board.h" file
//!
//! @param none.
//!
//! @return Integer 0
//!
//******************************************************************************
int main (void)
{
//U8 hwcb = FALSE;
Bool auto_b = 1;
if(eeprom_rd_byte( (U16) ENNB ) != 254)
eeprom_wr_byte((U16) ENNB, 254);
//DDRA = 0xFF;
//PORTA = 0x00;
//boot_conf[6] = 0x05;
//uint8_t NNB;
//NNB = eeprom_read_byte( (uint8_t*) 0 );
//eeprom_update_byte((uint8_t*)0, NNB);
//U8 mup = get_conf_byte(NNB);
//U8 mupp[64];
//------
//put_conf_byte(NNB, 0x02); //set node id
//put_conf_byte(BSB, 0xFF); //start programming
//eeprom_wr_byte(NNB, 0x03);
//------
//! --- First of all, disabling the Global Interrupt
Disable_interrupt();
//! --- If comming from RESET then test of the HardWare Condition Bit
if (MCUSR != 0)
{
//- Clear all reset flags
MCUSR = 0;
}
if(eeprom_rd_byte( (U16) EBSB ) != 0xFF){
// Start application
//PORTA = 0xFF;
isp_jump_to( (((U16)SA_H)<<8) | ((U16)SA_L));
}
//! --- Open CAN communication
can_communication_opened = 0; // Not opened
//- Pull-up on TxCAN & RxCAN one by one to use bit-addressing
CAN_PORT_DIR &= ~(1<<CAN_INPUT_PIN );
CAN_PORT_DIR &= ~(1<<CAN_OUTPUT_PIN);
CAN_PORT_OUT |= (1<<CAN_INPUT_PIN );
CAN_PORT_OUT |= (1<<CAN_OUTPUT_PIN);
while (1)
{
auto_b = ((~auto_b)&0x01); // Flip of "auto_b"
//- Wait until activity on RxCAN
while ((CAN_PORT_IN & (1<<CAN_INPUT_PIN)) != 0);
//- Reset CAN peripheral
Can_reset();
//- Set CAN Bit-timming
if (EB != 0xFF)
{
// CANBT1 = get_conf_byte(BTC1);
// CANBT2 = get_conf_byte(BTC2);
// CANBT3 = get_conf_byte(BTC3);
CANBT1 = BTC1;
CANBT2 = BTC2;
CANBT3 = BTC3;
}
else
//- Loop on auto-bitrate until it is performed
{
while ((Can_bit_timing(auto_b))==0); // c.f. macro in "can_drv.h"
}
//- Enable CAN peripheral
can_clear_all_mob(); // c.f. function in "can_drv.c"
Can_enable(); // c.f. macro in "can_drv.h"
//! --- CAN ISP protocol execution
//- Initialization of CAN ISP PROTOCOL only when CAN communication NOT opened
if(!can_communication_opened) can_isp_protocol_init();
//- Exit with "0" only if CAN hardware error occurs
while(can_isp_protocol_task());
}
} // End of "main"
