main.c

SPI Master Loopback Example Application main file. More...

Macros
#define	DELAY_MS   100

Functions
static bool	test_spi_tx_rx (SPIModuleNumber mod_num, uint8_t lsb_first)
	Function for testing the SPI master. More...
int	main (void)
	Function for main application entry. More...

Variables
static uint8_t	tx_data [TX_RX_MSG_LENGTH]
static uint8_t	rx_data [TX_RX_MSG_LENGTH]

Detailed Description

This file contains the source code for a sample application using SPI.

Macro Definition Documentation

#define DELAY_MS   100

Timer Delay in milli-seconds.

Function Documentation

static bool test_spi_tx_rx ( SPIModuleNumber  mod_num, uint8_t  lsb_first  )

static

Parameters

lsb_first[in]	If true, the least significant bits are transferred first.
mod_num[in]	spi module to be used, either SPI0 or SPI1 from enumeration SPIModuleNumber.

Return values

true
false	Error occurred

Note

If debug is enabled DEBUG, then this function will configure DEBUG_EVENT_READY_PIN to toggle (using GPIOTE) everytime READY_EVENTS are generated in the SPI

This flag will configure GPIOTE CONFIG0 and PPI channel 0, do not enable DEBUG while using two spi modules in parallel

int main

(

void

)

Test with shift Lsb first mode 0.

Delay for the events ready signal to be visually seen DEBUG flag is enabled.

test with shift Lsb first mode 0

Delay for the events ready signal to be visually seen DEBUG flag is enabled.

Variable Documentation

uint8_t tx_data[TX_RX_MSG_LENGTH]

static

SPI TX buffer.

uint8_t rx_data[TX_RX_MSG_LENGTH]

static

SPI RX buffer.