/**
* Implementing the CHAR dev write API.
*
* Note, this doesn't implement ulFlags specific options yet!
**/
static BT_s32 uartWrite(BT_HANDLE hUart, BT_u32 ulFlags, BT_u32 ulSize, const BT_u8 *pucSource) {
volatile LM3Sxx_UART_REGS *pRegs = hUart->pRegs;
BT_ERROR Error = BT_ERR_NONE;
BT_u8 ucData;
BT_u8 *pSrc = (BT_u8*)pucSource;
BT_u32 slWritten = 0;
switch(hUart->eMode) {
case BT_UART_MODE_POLLED:
{
while(ulSize) {
while((pRegs->FR & LM3Sxx_UART_FR_TXFF)) {
BT_ThreadYield();
}
pRegs->DR = *pucSource++;
ulSize--;
slWritten++;
}
break;
}
case BT_UART_MODE_BUFFERED:
{
slWritten = BT_FifoWrite(hUart->hTxFifo, ulSize, pSrc, 0);
pRegs->IM &= ~LM3Sxx_UART_INT_TX; // Disable the interrupt
while (!BT_FifoIsEmpty(hUart->hTxFifo, &Error) && (!(pRegs->FR & LM3Sxx_UART_FR_TXFF))) {
BT_FifoRead(hUart->hTxFifo, 1, &ucData, 0);
pRegs->DR = ucData;
}
pRegs->IM |= LM3Sxx_UART_INT_TX; // Enable the interrupt
break;
}
default:
break;
}
return slWritten;
}
void isr_CAN(BT_HANDLE hCan) {
volatile LPC17xx_CAN_REGS *pRegs = hCan->pRegs;
BT_ERROR Error;
BT_CAN_MESSAGE oMessage;
BT_u32 ulICR = pRegs->CANICR;
if (ulICR & LPC17xx_CAN_ICR_RI) {
CanReceive(g_CAN_HANDLES[0], &oMessage);
BT_FifoWrite(hCan->hRxFifo, 1, &oMessage, &Error);
}
if (ulICR & LPC17xx_CAN_ICR_TI) {
while (!BT_FifoIsEmpty(hCan->hTxFifo, &Error) && (canFindFreeBuffer(hCan) != LPC17xx_CAN_NO_FREE_BUFFER)) {
BT_FifoRead(hCan->hTxFifo, 1, &oMessage, &Error);
CanTransmit(hCan, &oMessage);
}
}
if (BT_FifoIsEmpty(hCan->hTxFifo, &Error)) {
pRegs->CANIER &= ~LPC17xx_CAN_IER_TIE; // Disable the interrupt
}
}
/**
* Note, this doesn't implement ulFlags specific options yet!
**/
static BT_ERROR canWrite(BT_HANDLE hCan, BT_CAN_MESSAGE *pCanMessage) {
volatile LPC17xx_CAN_REGS *pRegs = hCan->pRegs;
BT_CAN_MESSAGE oMessage;
BT_ERROR Error = BT_ERR_NONE;
switch(hCan->eMode) {
case BT_CAN_MODE_POLLED:
{
BT_u32 ulIndex;
while ((ulIndex = canFindFreeBuffer(hCan)) == LPC17xx_CAN_NO_FREE_BUFFER) {
BT_ThreadYield();
}
CanTransmit(hCan, pCanMessage);
break;
}
case BT_CAN_MODE_BUFFERED:
{
BT_FifoWrite(hCan->hTxFifo, 1, pCanMessage, &Error);
while (!BT_FifoIsEmpty(hCan->hTxFifo, &Error) && (canFindFreeBuffer(hCan) != LPC17xx_CAN_NO_FREE_BUFFER)) {
BT_FifoRead(hCan->hTxFifo, 1, &oMessage, &Error);
CanTransmit(hCan, &oMessage);
}
pRegs->CANIER |= LPC17xx_CAN_IER_TIE; // Enable the interrupt
break;
}
default:
break;
}
return Error;
}