Hello
I am trying to execute the functions of SPIS and thread on nrf52840
Refer to his code to write nrf52840 SPIS: https://devzone.nordicsemi.com/f/nordic-q-a/68854/nrf5340-nrfx-spis-no-events
My code is as follows
#include <zephyr.h>
#include <sys/printk.h>
#include "nrfx_spis.h"
#define PIN_SCK 29
#define PIN_MOSI 31
#define PIN_MISO 30
#define PIN_CSN 28
#define SPIS_NR 0
#include <devicetree.h>
#include <drivers/gpio.h>
#define LED0_NODE DT_ALIAS(led2)
#define LED0 DT_GPIO_LABEL(LED0_NODE, gpios)
//#define PIN DT_GPIO_PIN(LED0_NODE, gpios)
#define PIN 3
#define FLAGS DT_GPIO_FLAGS(LED0_NODE, gpios)
const struct device *led;
nrfx_spis_t spis_t = NRFX_SPIS_INSTANCE(SPIS_NR);
nrfx_spis_config_t spis_config_t = NRFX_SPIS_DEFAULT_CONFIG(PIN_SCK,PIN_MOSI,PIN_MISO,PIN_CSN);
uint8_t readend=0;
K_SEM_DEFINE(SPI_EVENT, 0, 1);
uint8_t rx_buffer[8];
uint8_t tx_buffer[8];
uint8_t tmpbuffer[8] = {0};
void spis_event_handler_t(nrfx_spis_evt_t const *p_event, void *p_context){
//printk("received\n");
int err;
switch(p_event->evt_type){
case NRFX_SPIS_XFER_DONE:
if(rx_buffer[0]!= 255)
{
printk("read");
for(int i=0;i<8;i++){
printk("%d ",rx_buffer[i]);
}
printk("\r\n");
}
err = nrfx_spis_buffers_set(&spis_t, tx_buffer, sizeof(tx_buffer), rx_buffer, sizeof(rx_buffer));
if(err != NRFX_SUCCESS){
printk("Error with setting.\n");
}
k_sem_give(&SPI_EVENT);
break;
default:
;
}
}
static void manual_isr_setup()
{
IRQ_DIRECT_CONNECT(SPIM0_SPIS0_TWIM0_TWIS0_SPI0_TWI0_IRQn, 0, nrfx_spis_0_irq_handler, 0);
irq_enable(SPIM0_SPIS0_TWIM0_TWIS0_SPI0_TWI0_IRQn);
}
void init_spis(){
int err;
err = nrfx_spis_init(&spis_t,&spis_config_t,spis_event_handler_t,NULL);
if(err != NRFX_SUCCESS){
printk("Error with init.\n");
} else {
printk("SPIS started.\n");
}
}
void main(void)
{
int err,k=0,ret;
init_spis();
bool low = true;
bool high =! low;
led = device_get_binding(LED0);
if (led == NULL) {
return;
}
ret = gpio_pin_configure(led, PIN, GPIO_OUTPUT_ACTIVE | FLAGS);
if (ret < 0) {
return;
}
gpio_pin_set(led, PIN, (int)low);
manual_isr_setup();
err = nrfx_spis_buffers_set(&spis_t, tx_buffer, sizeof(tx_buffer), rx_buffer, sizeof(rx_buffer));
if(err != NRFX_SUCCESS){
printk("Error with setting.\n");
}
while(true){
if(k_sem_take(&SPI_EVENT, K_FOREVER)==0){
gpio_pin_set(led, PIN, (int)low);
printk("write ");
for(int i = 0 ; i< 8 ; i++)
tx_buffer[i] = k+i;
k++;
for(int i = 0 ; i< 8 ; i++)
printk("%d ",tx_buffer[i]);
printk("\r\n");
gpio_pin_set(led, PIN, (int)high);
gpio_pin_set(led, PIN, (int)low);
}
}
}
and this is my proj.conf
CONFIG_DEBUG=y CONFIG_GPIO=y CONFIG_NRFX_SPIS0=y
I want to give a semaphore of SPI_EVENT when the interrupt occurs
main will wait for take SPI_EVENT and can use SPI to write to the master (that is, get the semaphore SPI_EVENT)
But currently I am stuck in the event handler, k_sem_give(&SPI_EVENT) cannot pass the signal to main
The result of the operation is as follows
If you don’t use semaphore and simply use flag instead, there is no problem.
Is my IRQ not set completely, or is there a problem with my semaphore setting?
