Hello,
I want to read two files from SD card using nRF9160dk. I tried this code ncs/zephyr/samples/subsys/fs/fat_fs.
The Code:
/*
* Copyright (c) 2019 Tavish Naruka <tavishnaruka@gmail.com>
*
* SPDX-License-Identifier: Apache-2.0
*/
/* Sample which uses the filesystem API and SDHC driver */
#include <zephyr.h>
#include <device.h>
#include <disk/disk_access.h>
#include <logging/log.h>
#include <fs/fs.h>
#include <ff.h>
LOG_MODULE_REGISTER(main);
static int lsdir(const char *path);
static FATFS fat_fs;
/* mounting info */
static struct fs_mount_t mp = {
.type = FS_FATFS,
.fs_data = &fat_fs,
};
/*
* Note the fatfs library is able to mount only strings inside _VOLUME_STRS
* in ffconf.h
*/
static const char *disk_mount_pt = "/SD:";
void main(void)
{
/* raw disk i/o */
do {
static const char *disk_pdrv = "SD";
u64_t memory_size_mb;
u32_t block_count;
u32_t block_size;
if (disk_access_init(disk_pdrv) != 0) {
LOG_ERR("Storage init ERROR!");
break;
}
if (disk_access_ioctl(disk_pdrv,
DISK_IOCTL_GET_SECTOR_COUNT, &block_count)) {
LOG_ERR("Unable to get sector count");
break;
}
LOG_INF("Block count %u", block_count);
if (disk_access_ioctl(disk_pdrv,
DISK_IOCTL_GET_SECTOR_SIZE, &block_size)) {
LOG_ERR("Unable to get sector size");
break;
}
printk("Sector size %u\n", block_size);
memory_size_mb = (u64_t)block_count * block_size;
printk("Memory Size(MB) %u\n", (u32_t)memory_size_mb>>20);
} while (0);
mp.mnt_point = disk_mount_pt;
int res = fs_mount(&mp);
if (res == FR_OK) {
printk("Disk mounted.\n");
lsdir(disk_mount_pt);
} else {
printk("Error mounting disk.\n");
}
while (1) {
k_sleep(1000);
}
}
static int lsdir(const char *path)
{
int res;
struct fs_dir_t dirp;
static struct fs_dirent entry;
/* Verify fs_opendir() */
res = fs_opendir(&dirp, path);
if (res) {
printk("Error opening dir %s [%d]\n", path, res);
return res;
}
printk("\nListing dir %s ...\n", path);
for (;;) {
/* Verify fs_readdir() */
res = fs_readdir(&dirp, &entry);
/* entry.name[0] == 0 means end-of-dir */
if (res || entry.name[0] == 0) {
break;
}
if (entry.type == FS_DIR_ENTRY_DIR) {
printk("[DIR ] %s\n", entry.name);
} else {
printk("[FILE] %s (size = %zu)\n",
entry.name, entry.size);
}
}
/* Verify fs_closedir() */
fs_closedir(&dirp);
return res;
}
I am getting the following error:
***** Booting Zephyr OS build v1.14.99-ncs3-snapshot2-2647-gd6e67554cfeb ***** [00:00:00.024,078] [0m<inf> spi_nrfx_spim: CS control inhibited (no GPIO device)[0m [00:00:05.039,306] [1;31m<err> main: Storage init ERROR![0m Error mounting disk. [00:00:10.054,565] [1;31m<err> fs: fs mount error (-5)[0m
nrf9160_pca10090ns.overlay:
/*
* Copyright (c) 2019 Tavish Naruka <tavishnaruka@gmail.com>
*
* SPDX-License-Identifier: Apache-2.0
*/
&spi3 {
status = "okay";
cs-gpios = <&gpio0 16 0>;
sdhc0: sdhc@0 {
compatible = "zephyr,mmc-spi-slot";
reg = <0>;
status = "okay";
label = "SDHC0";
spi-max-frequency = <24000000>;
};
};
&spi3 {
status = "okay";
sck-pin = <19>;
mosi-pin = <18>;
miso-pin = <17>;
};I checked the voltage levels at SPI_3 pins. Pin 16, 17, 18 shows 3V but 19 which is SCK is at 0V. I am not understanding why it is at 0V.
Why there is error? What else I need to do?
