nrf52840 Slave mode is not supported on SPI_0 #29999
Description
I am trying to do SPI slave on nrf52840
I refer to the link to make changes: https://github.com/foldedtoad/spi_slave
But his version is too old (2.1.99), and mine is already 2.4.99
After the modification, the result I presented showed it did not support SPI_0
Here is my spi slave setting code
#include <string.h>
#include <errno.h>
#include <zephyr.h>
#include <sys/printk.h>
#include <device.h>
#include "spi.h"
#include "spi_slave.h"
int spi_slave_write(struct device * spi,
struct spi_config * spi_cfg,
uint16_t * data)
{
struct spi_buf bufs = {
.buf = data,
.len = 2
};
struct spi_buf_set tx = {
.buffers = &bufs
};
tx.count = 1;
return spi_write(spi, spi_cfg, &tx);
}
int spi_slave_read(struct device * spi,
struct spi_config * spi_cfg,
uint16_t * data)
{
struct spi_buf bufs = {
.buf = data,
.len = 2
};
struct spi_buf_set rx = {
.buffers = &bufs
};
rx.count = 1;
return spi_read(spi, spi_cfg, &rx);
}
void spi_slave_init(void)
{
struct device * spi;
struct spi_config spi_cfg;
uint16_t tx_data = 0x5678;
uint16_t rx_data = 0;
printk("SPI Slave example application\n");
printk("rx_data buffer at %p\n", &rx_data);
//spi = device_get_binding(DT_LABLE(DT_ALIAS(spi0)));
//spi = device_get_binding(DT_LABEL(DT_INST(0, nordic_nrf52_spis)));
//spi = device_get_binding(DT_INST_0_NORDIC_NRF_SPIS_LABEL);
//spi = device_get_binding(DT_ALIAS_SPI_0_LABEL);
spi = device_get_binding("SPI_0");
if (!spi) {
printk("Could not find SPI driver\n");
return;
}
memset(&spi_cfg, 0, sizeof(spi_cfg));
spi_cfg.operation = SPI_WORD_SET(8) | SPI_OP_MODE_SLAVE;
spi_cfg.frequency = 1000000;
printk("%s: slave config @ %p:"
" wordsize(%u), mode(%u/%u/%u)\n", __func__, &spi_cfg,
SPI_WORD_SIZE_GET(spi_cfg.operation),
(SPI_MODE_GET(spi_cfg.operation) & SPI_MODE_CPOL) ? 1 : 0,
(SPI_MODE_GET(spi_cfg.operation) & SPI_MODE_CPHA) ? 1 : 0,
(SPI_MODE_GET(spi_cfg.operation) & SPI_MODE_LOOP) ? 1 : 0);
while (1) {
spi_slave_read(spi, &spi_cfg, &rx_data);
if (rx_data == 0x1234) {
spi_slave_write(spi, &spi_cfg, &tx_data);
}
printk("Received: 0x%04X -- %s\n", rx_data,
(rx_data == 0x1234) ? "ok" : "wrong");
}
}
I am not sure if there is a problem with my prj.conf settings
CONFIG_DEBUG=y
CONFIG_GPIO=y
CONFIG_SPI=y
CONFIG_SPI_NRFX=y
CONFIG_SPI_ASYNC=y
CONFIG_SPI_SLAVE=y
CONFIG_SPI_0=y
#CONFIG_SPI_0_NRF_SPIS=y
#CONFIG_SPI=y
#CONFIG_SPI_0=y
#CONFIG_SPI_SLAVE=y
CONFIG_SPI_0_OP_MODES=2
#CONFIG_SPI_0_NRF_SPIS=y
CONFIG_SPI_0_NRF_ORC=0xff
CONFIG_NRFX_SPIS0=y
CONFIG_PRINTK=y
CONFIG_LOG=y
CONFIG_LOG_DEFAULT_LEVEL=3
CONFIG_LOG_OVERRIDE_LEVEL=0
CONFIG_LOG_MAX_LEVEL=4
CONFIG_LOG_FUNC_NAME_PREFIX_DBG=y
CONFIG_LOG_PRINTK=y
CONFIG_LOG_PRINTK_MAX_STRING_LENGTH=128
CONFIG_LOG_MODE_OVERFLOW=y
CONFIG_LOG_PROCESS_TRIGGER_THRESHOLD=10
CONFIG_LOG_PROCESS_THREAD=y
CONFIG_LOG_PROCESS_THREAD_SLEEP_MS=1000
CONFIG_LOG_PROCESS_THREAD_STACK_SIZE=768
CONFIG_LOG_BUFFER_SIZE=6144
CONFIG_LOG_DETECT_MISSED_STRDUP=y
CONFIG_LOG_STRDUP_MAX_STRING=32
CONFIG_LOG_STRDUP_BUF_COUNT=4
CONFIG_LOG_BACKEND_SHOW_COLOR=n
In addition, in board/nrf52_pca10056.overlay, the setting of spi is as follows
&spi0 {
compatible = "nordic,nrf52-spis";
label = "SPI_0";
status = "okay";
mosi-pin = <28>;
miso-pin = <29>;
sck-pin = <30>;
csn-pin = <31>;
def-char = <0xFF>;
};
The result is as follows
spi_nrfx_spi: Slave mode is not supported on SPI_0
Is there something wrong with my setting in spi = device_get_binding("SPI_0");
How do I set the device_get_binding of spi
Or, is there an example of spi master/slave of nrf52840 of zephyr 2.4.99v