I build project without problems, but this simple sample return zero results for read buffer. I return 5 zero from 5 zeros.
I have right names for overlays files. nrf9160_pca10090ns.overlay AND nrf9160_pca10090.overlay But it not correct work for me.
Main.c
#include <zephyr.h>
#include <sys/printk.h>
#include <drivers/spi.h>
static const struct spi_config spi_cfg = {
.operation = SPI_WORD_SET(8) | SPI_TRANSFER_MSB |
SPI_MODE_CPOL | SPI_MODE_CPHA,
.frequency = 4000000,
.slave = 0,
};
struct device * spi_dev;
static void spi_init(void)
{
const char* const spiName = "SPI_3";
spi_dev = device_get_binding(spiName);
if (spi_dev == NULL) {
printk("Could not get %s device\n", spiName);
return;
}
}
void spi_test_send(void)
{
int err_write;
int err_read;
u8_t tx_buffer[1]={'A'};
u8_t rx_buffer[1];
const struct spi_buf tx_buf = {
.buf = tx_buffer,
.len = sizeof(tx_buffer)
};
const struct spi_buf_set tx = {
.buffers = &tx_buf,
.count = 1
};
struct spi_buf rx_buf = {
.buf = rx_buffer,
.len = sizeof(rx_buffer),
};
const struct spi_buf_set rx = {
.buffers = &rx_buf,
.count = 1
};
printk("new iteration\n");
err_write = spi_write(spi_dev, &spi_cfg,&tx);//spi_transceive(spi_dev, &spi_cfg, &tx, &rx);
err_read = spi_read(spi_dev, &spi_cfg,&rx);
if (err_write||err_read) {
printk("SPI error_write: %d\n", err_write);
printk("SPI error_read: %d\n", err_read);
} else {
/* Connect MISO to MOSI for loopback */
printk("TX sent: %x\n", tx_buffer[0]);
printk("RX recv: %x\n", rx_buffer[0]);
//tx_buffer[0]++;
}
}
void main(void)
{
printk("SPIM Example\n");
//spi_init();
int counter= 0;
while (counter < 5) {
spi_test_send();
k_sleep(1000);
counter++;
}
}overlay file
&spi3 {
status = "ok";
sck-pin = <10>;
mosi-pin = <11>;
miso-pin = <12>;
ss-pin = <13>;
spi-max-frequency = <4000000>;
};
prj file
CONFIG_SERIAL=y CONFIG_TRUSTED_EXECUTION_NONSECURE=y CONFIG_UART_INTERRUPT_DRIVEN=y #CONFIG_UART_0_NRF_UARTE=y # LTE link control CONFIG_LTE_LINK_CONTROL=n CONFIG_LTE_AUTO_INIT_AND_CONNECT=n # BSD library CONFIG_BSD_LIBRARY=y CONFIG_BSD_LIBRARY_TRACE_ENABLED=n # network CONFIG_TEST_RANDOM_GENERATOR=y CONFIG_NETWORKING=y CONFIG_NET_BUF_USER_DATA_SIZE=1 CONFIG_NET_SOCKETS_OFFLOAD=y CONFIG_NET_SOCKETS=y CONFIG_NET_SOCKETS_POSIX_NAMES=y #CONFIG_NET_RAW_MODE=y CONFIG_HEAP_MEM_POOL_SIZE=1024 # SPI CONFIG_SPI=y CONFIG_SPI_3=y #CONFIG_SPI_3_NRF_SPIM=y #CONFIG_SPI_3=y CONFIG_SPI_NRFX=y CONFIG_MAIN_STACK_SIZE=4096 CONFIG_LEGACY_TIMEOUT_API=y
