Waveshare NRF52840, Руководство пользователя

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NRF52840 Eval Kit User Manual
Vision: V1.0.1 Date: 2019.01.19 29 / 72
CHAPTER 6. SPI
Examples used in this chapter: 004_SPI(Example), 005_SPI(OLED)
In this chapter, we will describe about how to use SPI interface of NRF52840, do
loopback testing and try to drive a 0.96inch OLED module.
LOOPBACK TESTING
main.c
#include "nrf_drv_spi.h"
#include "nrf_gpio.h"
#include "app_util_platform.h"
#include "nrf_delay.h"
#include "app_error.h"
#include <string.h>
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "spi.h"
int main ( void )
{
APP_ERROR_CHECK ( NRF_LOG_INIT ( NULL ));
NRF_LOG_DEFAULT_BACKENDS_INIT ();
nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG ;
spi_config . ss_pin = CS_PIN ;
spi_config . miso_pin = MISO_PIN ;
spi_config . mosi_pin = MOSI_PIN ;
spi_config . sck_pin = SCK_PIN ;
/*
Doesn't print what to send or what received in SPI
*/
//APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, NULL,
NULL));
/*
Print what to send or what received in SPI
*/
APP_ERROR_CHECK ( nrf_drv_spi_init (& spi , & spi_config ,
spi_event_handler , NULL ));