Hi Patroklos Anagonostou,
Sorry for my later reply!
I have test the lpcopen spi master in my LPCXpresso 54102 board, the GPIO PIO0_19 can track the SPI wave correctly.
This is my logic analyzer SPI wave
Clock rate is 4Mhz.
My modified code is lpc5410x_xpresso54102_keil_iar_v3.03.000_16, project periph_spi_sm_int.
Main code is :
int main(void)
{
int loop = 1; /* Prevents unreachable statement warning */
uint16_t seed = 0;
volatile uint8_t *mstate, *sstate;
SystemCoreClockUpdate();
Board_Init();
Chip_GPIO_SetPinDIROutput(LPC_GPIO, 0, 19);
Chip_GPIO_SetPinState(LPC_GPIO, 0, 19, true);
Chip_GPIO_SetPinOutHigh(LPC_GPIO, 0, 19);
/* SPI initialization */
Init_SPI_PinMux();
/* Initialize stopwatch driver so some event times can be measured */
StopWatch_Init();
/* Setup SPI controllers */
setupMaster();
setupSlave();
/* Enable SPI controller interrupts */
NVIC_EnableIRQ(LPC_SPIMASTERIRQNUM);
NVIC_EnableIRQ(LPC_SPISLAVEIRQNUM);
DEBUGOUT("SPI master/slave combined example\r\n");
/* Loop forever */
while (loop) {
/* Setup some data for transmit from master to slave and slave to master */
seed = bufferInit(seed);
masterTXBuffer16[0] = 0X1111;
masterTXBuffer16[1] = 0X2222;
/* Set master transfer, this is only the initial trasnfer, the callbacks can
change this later */
spiMasterXfer.cbFunc = master_cb;
spiMasterXfer.state = SPIS_XFER_STATE_IDLE;
spiMasterXfer.txBuff = masterTXBuffer16;
spiMasterXfer.txCount = 1;/* Count is in transfer size */
spiMasterXfer.rxBuff = masterRXBuffer16;
spiMasterXfer.rxCount = 1;/* Count is in transfer size */
mstate = &spiMasterXfer.state;
/* Setup master trasnfer options - 16 data bits per transfer, EOT, EOF */
spiMasterXfer.options =
SPIM_XFER_OPTION_SIZE(16) | /* This must be enabled as a minimum, use 16 data bits */
SPIM_XFER_OPTION_EOT | /* Enable this to assert and deassert SSEL for each individual byte/word, current slave functions for this example do not support this */
SPIM_XFER_OPTION_EOF | /* Insert a delay between bytes/words as defined by frame delay time */
0;
/* Use SPI select 0 */
spiMasterXfer.sselNum = 0;
/* Time master and slave transfers */
masterTime = StopWatch_Start();
/* Limitation: The call below 'pre-buffers' the initial slave transmit datum.
If this isn't pre-buffered, a slave transmit underflow will always occur
at slave assertion time for the initial transmit datum. The datum sent to the
master will be 0. This is ok as we are only using a single slave, but with multiple
slaves pre-buffering is not always an option and the master might need to toss the
first byte. */
Chip_SPI_FlushFifos(LPC_SPIMASTERPORT);
Chip_GPIO_SetPinOutHigh(LPC_GPIO, 0, 19);
/* Start master transfer */
Chip_SPIM_Xfer(LPC_SPIMASTERPORT, &spiMasterXfer);
/* Sleep until transfers are complete */
while ((*mstate != SPIM_XFER_STATE_DONE) ) {
//__WFI();
}
Chip_GPIO_SetPinOutLow(LPC_GPIO, 0, 19);
//===============================
spiMasterXfer.cbFunc = master_cb;
spiMasterXfer.state = SPIS_XFER_STATE_IDLE;
spiMasterXfer.txBuff = masterTXBuffer16+1;
spiMasterXfer.txCount = 1;/* Count is in transfer size */
spiMasterXfer.rxBuff = masterRXBuffer16;
spiMasterXfer.rxCount = 1;/* Count is in transfer size */
mstate = &spiMasterXfer.state;
/* Setup master trasnfer options - 16 data bits per transfer, EOT, EOF */
spiMasterXfer.options =
SPIM_XFER_OPTION_SIZE(16) | /* This must be enabled as a minimum, use 16 data bits */
SPIM_XFER_OPTION_EOT | /* Enable this to assert and deassert SSEL for each individual byte/word, current slave functions for this example do not support this */
SPIM_XFER_OPTION_EOF | /* Insert a delay between bytes/words as defined by frame delay time */
0;
/* Use SPI select 0 */
spiMasterXfer.sselNum = 0;
/* Time master and slave transfers */
masterTime = StopWatch_Start();
/* Limitation: The call below 'pre-buffers' the initial slave transmit datum.
If this isn't pre-buffered, a slave transmit underflow will always occur
at slave assertion time for the initial transmit datum. The datum sent to the
master will be 0. This is ok as we are only using a single slave, but with multiple
slaves pre-buffering is not always an option and the master might need to toss the
first byte. */
Chip_SPI_FlushFifos(LPC_SPIMASTERPORT);
Chip_GPIO_SetPinOutHigh(LPC_GPIO, 0, 19);
/* Start master transfer */
Chip_SPIM_Xfer(LPC_SPIMASTERPORT, &spiMasterXfer);
/* Sleep until transfers are complete */
while ((*mstate != SPIM_XFER_STATE_DONE) ) {
//__WFI();
}
Chip_GPIO_SetPinOutLow(LPC_GPIO, 0, 19);
/* Toggle LED */
Board_LED_Toggle(0);
while (Board_UARTGetChar() == EOF) {}
}
return 0;
}
I also attached my spi_sm_int.c file for your reference.
You can try my code on your side.
Have a great day,
Kerry
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