I am trying to get a simple spi setup working. Through the dev zone I found a link to this https://github.com/Rallare/fw-nrfconnect-nrf/tree/nrf9160_samples/samples/nrf9160/spi repository.
I was successful in getting the uart example from the same repository to build and run on my nRF9160 DK. However when I attempt to run the spi example it results in the ***** HARD FAULT **** that can be seen in the serial output below. I have attached my nrf9160_pca10090.overlay prj.conf and main.c files
Serial output
***** Booting Zephyr OS v1.14.99-ncs1 ***** Flash region..Domain..Permissions 00 0x00000 0x08000 .Secure..rwxl 01 0x08000 0x10000 .Non-Secure.rwxl 02 0x10000 0x18000 .Non-Secure.rwxl 03 0x18000 0x20000 .Non-Secure.rwxl 04 0x20000 0x28000 .Non-Secure.rwxl 05 0x28000 0x30000 .Non-Secure.rwxl 06 0x30000 0x38000 .Non-Secure.rwxl 07 0x38000 0x40000 .Non-Secure.rwxl 08 0x40000 0x48000 .Non-Secure.rwxl 09 0x48000 0x50000 .Non-Secure.rwxl 10 0x50000 0x58000 .Non-Secure.rwxl 11 0x58000 0x60000 .Non-Secure.rwxl 12 0x60000 0x68000 .Non-Secure.rwxl 13 0x68000 0x70000 .Non-Secure.rwxl 14 0x70000 0x78000 .Non-Secure.rwxl 15 0x78000 0x80000 .Non-Secure.rwxl 16 0x80000 0x88000 .Non-Secure.rwxl 17 0x88000 0x90000 .Non-Secure.rwxl 18 0x90000 0x98000 .Non-Secure.rwxl 19 0x98000 0xa0000 .Non-Secure.rwxl 20 0xa0000 0xa8000 .Non-Secure.rwxl 21 0xa8000 0xb0000 .Non-Secure.rwxl 22 0xb0000 0xb8000 .Non-Secure.rwxl 23 0xb8000 0xc0000 .Non-Secure.rwxl 24 0xc0000 0xc8000 .Non-Secure.rwxl 25 0xc8000 0xd0000 .Non-Secure.rwxl 26 0xd0000 0xd8000 .Non-Secure.rwxl 27 0xd8000 0xe0000 .Non-Secure.rwxl 28 0xe0000 0xe8000 .Non-Secure.rwxl 29 0xe8000 0xf0000 .Non-Secure.rwxl 30 0xf0000 0xf8000 .Non-Secure.rwxl 31 0xf8000 0x100000 .Non-Secure.rwxl SRAM region..Domain..Permissions 00 0x00000 0x02000.Secure..rwxl 01 0x02000 0x04000.Secure..rwxl 02 0x04000 0x06000.Secure..rwxl 03 0x06000 0x08000.Secure..rwxl 04 0x08000 0x0a000.Secure..rwxl 05 0x0a000 0x0c000.Secure..rwxl 06 0x0c000 0x0e000.Secure..rwxl 07 0x0e000 0x10000.Secure..rwxl 08 0x10000 0x12000.Non-Secure.rwxl 09 0x12000 0x14000.Non-Secure.rwxl 10 0x14000 0x16000.Non-Secure.rwxl 11 0x16000 0x18000.Non-Secure.rwxl 12 0x18000 0x1a000.Non-Secure.rwxl 13 0x1a000 0x1c000.Non-Secure.rwxl 14 0x1c000 0x1e000.Non-Secure.rwxl 15 0x1e000 0x20000.Non-Secure.rwxl 16 0x20000 0x22000.Non-Secure.rwxl 17 0x22000 0x24000.Non-Secure.rwxl 18 0x24000 0x26000.Non-Secure.rwxl 19 0x26000 0x28000.Non-Secure.rwxl 20 0x28000 0x2a000.Non-Secure.rwxl 21 0x2a000 0x2c000.Non-Secure.rwxl 22 0x2c000 0x2e000.Non-Secure.rwxl 23 0x2e000 0x30000.Non-Secure.rwxl 24 0x30000 0x32000.Non-Secure.rwxl 25 0x32000 0x34000.Non-Secure.rwxl 26 0x34000 0x36000.Non-Secure.rwxl 27 0x36000 0x38000.Non-Secure.rwxl 28 0x38000 0x3a000.Non-Secure.rwxl 29 0x3a000 0x3c000.Non-Secure.rwxl 30 0x3c000 0x3e000.Non-Secure.rwxl 31 0x3e000 0x40000.Non-Secure.rwxl Peripheral..Domain..Status 00 NRF_P0..Non-Secure.OK 01 NRF_CLOCK..Non-Secure.OK 02 NRF_RTC1..Non-Secure.OK 03 NRF_NVMC..Non-Secure.OK 04 NRF_UARTE1..Non-Secure.OK 05 NRF_UARTE2..Secure..SKIP 06 NRF_IPC..Non-Secure.OK 07 NRF_VMC..Non-Secure.OK 08 NRF_FPU..Non-Secure.OK 09 NRF_EGU1..Non-Secure.OK 10 NRF_EGU2..Non-Secure.OK 11 NRF_TWIM2..Non-Secure.OK 12 NRF_SPIM3..Non-Secure.OK 13 NRF_TIMER0..Non-Secure.OK 14 NRF_TIMER1..Non-Secure.OK 15 NRF_TIMER2..Non-Secure.OK 16 NRF_SAADC..Non-Secure.OK 17 NRF_GPIOTE1..Non-Secure.OK SPM: NS image at 0x8000 SPM: NS MSP at 0x20022258 SPM: NS reset vector at 0xa191 SPM: prepare to jump to Non-Secure image. Exception occurred in Secure State ***** HARD FAULT ***** Fault escalation (see below) ***** BUS FAULT ***** Precise data bus error BFAR Address: 0x50008120 ***** Hardware exception ***** Current thread ID = 0x20020178 Faulting instruction address = 0x0 Fatal fault in ISR! Spinning...
nrf9160_pca10090.overlay
&spi3 {
status = "ok";
sck-pin = <9>;
mosi-pin = <8>;
miso-pin = <7>;
ss-pin = <10>;
spi-max-frequency = <4000000>;
};
prj.conf
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
main.c
/*
* Copyright (c) 2012-2014 Wind River Systems, Inc.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr.h>
#include <misc/printk.h>
#include <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;
static u8_t tx_buffer[1];
static 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
};
err = spi_transceive(spi_dev, &spi_cfg, &tx, &rx);
if (err) {
printk("SPI error: %d\n", err);
} 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();
while (1) {
spi_test_send();
k_sleep(1000);
}
}
For building the solution I am using SEGGER V4.16 on Windows 10. I use Build Solution under the Build menu. The build succeeds. Then I Connect J-link under the Target menu and finally, I upload the merged.hex file using the Download Intel hex file... command under the Download submenu of the Target menu. The upload is successful.
1. Is there something simple I am overlooking in the example that is causing the hard fault?
2. Is there a different example to test the spi with? My ultimate goal of being able to connect an adxl372 accelerometer.
