void can_r_rxbuf(uint8_t bufid, void *buf, uint8_t len)
{
uint16_t i;
uint8_t *sbuf = (uint8_t *)buf;
CAN_CS_LOW;
SPI_receiveData(MCP2515_SPI_READ_RXBUF | (bufid & 0x06));
for (i=0; i < len; i++) {
sbuf[i] = SPI_receiveData(0xFF);
}
CAN_CS_HIGH;
}
void can_r_reg(uint8_t addr, void *buf, uint8_t len)
{
uint16_t i;
uint8_t *sbuf = (uint8_t *)buf;
CAN_CS_LOW;
SPI_receiveData(MCP2515_SPI_READ);
SPI_receiveData(addr);
for (i=0; i < len; i++) {
sbuf[i] = spi_transfer(0xFF);
}
CAN_CS_HIGH;
}
__interrupt void USCI_A0_ISR (void)
{
switch (__even_in_range(UCA0IV,4)){
//Vector 2 - RXIFG
case 2:
//USCI_A0 TX buffer ready?
while (!SPI_getInterruptStatus(__MSP430_BASEADDRESS_USCI_A0__,
SPI_TRANSMIT_INTERRUPT
)) ;
//Transmit data to master
SPI_transmitData(__MSP430_BASEADDRESS_USCI_A0__,
transmitData
);
//Receive data from master
receiveData = SPI_receiveData(__MSP430_BASEADDRESS_USCI_A0__);
//Increment data to be transmitted
transmitData++;
break;
default: break;
}
}
uint8_t can_spi_query(uint32_t moduleInstance)
{
uint8_t ret;
CAN_CS_LOW;
SPI_transmitData(moduleInstance, 0xFF);
ret = SPI_receiveData(moduleInstance);
CAN_CS_HIGH;
return ret;
}