//Use this assume it passes !spiBufFull condition. so there is at least 1 space in the buf.
BOOL _spiBufAdd(uint32 slaveId, uint32 outData, uint32 *indata)
{
uint32 i;
//this area need to be protected if it is a pre-emptyive OS,
//or if we allow ISR/DSR to call. We will protect with disabling
//interrupts.
#ifdef _SPI_INTERRUPT_SAFE
TCInterruptGlobalDisable();
#endif
if(spiBufFull())
{
#ifdef _SPI_INTERRUPT_SAFE
TCInterruptGlobalRestore();
#endif
return FALSE;
}
i = spiBufTail;
spiBuf[i].ssId = slaveId;
spiBuf[i].outData = outData;
spiBuf[i].inData = indata;
spiBuf[i].bPending = FALSE;
spiBufTail = (spiBufTail+1) % SPI_MAX_BUF_SIZE;
spiSetInterrupt(SPI_TX_EMPTY | SPI_RX_FULL);
#ifdef _SPI_INTERRUPT_SAFE
TCInterruptGlobalRestore();
#endif
return TRUE;
}
void i2cIntDsr(void)
{
uint32 int_stat = MPTR(IC_INTR_STAT);
uint32 int_raw_stat = MPTR(IC_RAW_INTR_STAT);
//disable interrupt
TCInterruptGlobalDisable();
//SYS_TRACE3(SYSDEBUG_TRACE_I2C, int_stat, int_raw_stat, tempTran.status);
if((int_stat & BIT4) && ((int_raw_stat & BIT8) == 0)) { // TX empty and no activity
switch(tempTran.status) {
int i;
case 2:
//we are guranteed to have enough buf
for(i = 0; i < tempTran.length; i++) {
switch (tempTran.type) {
case 0:
_i2cIntWriteCmd(0x100);
break;
case 1:
_i2cIntWriteCmd(tempTran.data[tempTran.cur_pos]);
tempTran.cur_pos++;
break;
}
}
tempTran.status++;
break;
case 3:
MPTR(IC_INTR_MASK) &= ~BIT4; //clear TX empty interrupt
if(tempTran.type == 1) {
resetTran(&tempTran);
MPTR(IC_INTR_MASK) = 0;
//SYS_TRACE0(SYSDEBUG_TRACE_I2C);
TCSemaphoreSignal(i2cCompleteSemId);
}
break;
default:
break;
}
}
if(int_stat & BIT2) { // Rx not empty
//while(MPTR(IC_STATUS) & BIT3) {//rx not
while(MPTR(IC_RXFLR) != 0) {//rx not empty
tempTran.data[tempTran.cur_pos] = MPTR(IC_DATA_CMD);
tempTran.cur_pos++;
}
if(tempTran.cur_pos >= tempTran.length) {
resetTran(&tempTran);
MPTR(IC_INTR_MASK) = 0;
//SYS_TRACE1(SYSDEBUG_TRACE_I2C, tempTran.cur_pos);
TCSemaphoreSignal(i2cCompleteSemId);
}
}
if(int_stat & BIT6) { //Tx Error
i2c_tx_err_counter++;
i2c_last_tx_error = MPTR(IC_TX_ABRT_SOURCE);
resetTran(&tempTran);
MPTR(IC_INTR_MASK) = 0;
//SYS_TRACE2(SYSDEBUG_TRACE_I2C, i2c_last_tx_error, i2c_tx_err_counter);
TCSemaphoreSignal(i2cCompleteSemId);
}
_i2cClearIntr();
TCInterruptGlobalRestore();
}