Zephyr Mass storage sample (external sd card)

[suads]

Hi I m trying to implement mass storage on the arduino nano 33 ble sense board(nrf 52840) and I2c together. I m using the sample from zephyr and it will not mount the file system, I2c is working. Pin connections are OK.

I m using the build Booting Zephyr OS build v3.1.0-rc3-56-ge494d9c0727e

Here is the output:

fs: fs mount error (-5)
[<err> main: Failed to mount filesystem
[<inf> main: The device is put in USB mass storage mode.

Here is the overlay file:

&spi2 {
        status = "okay";
        cs-gpios = <&gpio1 2 GPIO_ACTIVE_LOW>;

        sdhc0: sdhc@0 {
                compatible = "zephyr,sdhc-spi-slot";
                reg = <0>;
                status = "okay";
                label = "SDHC_0";
                mmc {
                    compatible = "zephyr,sdmmc-disk";
                    status = "okay";
                    label = "SDMMC_0";
                };
                spi-max-frequency = <16000000>;
        };
};

&i2c1 {
  compatible = "nordic,nrf-twim";
  status = "okay";
  label="myi2c";
  sda-pin = <14>; //P0.14
  scl-pin = <15>; //P0.15
};

and the prj.conf file

CONFIG_STDOUT_CONSOLE=y

#USB related configs
CONFIG_USB_DEVICE_STACK=y
CONFIG_USB_DEVICE_PRODUCT="Zephyr MSC sample"
CONFIG_LOG=y
CONFIG_USB_DRIVER_LOG_LEVEL_ERR=y
CONFIG_USB_MASS_STORAGE=y
CONFIG_USB_DEVICE_LOG_LEVEL_ERR=y
CONFIG_USB_MASS_STORAGE_LOG_LEVEL_ERR=y

CONFIG_MAIN_STACK_SIZE=2048

CONFIG_DISK_ACCESS=y
CONFIG_SPI=y
CONFIG_I2C=y

I tried the same example on zephyr v2.7.0 commit 6dd320f and mass storage is working but if I add I2C , im getting MPU FAULT.

[00:00:00.509,887] ␛[1;31m<err> os:   Data Access Violation␛[0m
[00:00:00.509,918] ␛[1;31m<err> os:   MMFAR Address: 0x3da1␛[0m
[00:00:00.509,918] ␛[1;31m<err> os: r0/a1:  0x00000000  r1/a2:  0x00000009  r2/a3:  0x00000200␛[0m
[00:00:00.509,918] ␛[1;31m<err> os: r3/a4:  0x11f38040 r12/ip:  0xe000e100 r14/lr:  0x00013f2d␛[0m
[00:00:00.509,918] ␛[1;31m<err> os:  xpsr:  0x01000000␛[0m
[00:00:00.509,918] ␛[1;31m<err> os: Faulting instruction address (r15/pc): 0x0001c35c␛[0m
[00:00:00.509,948] ␛[1;31m<err> os: >>> ZEPHYR FATAL ERROR 0: CPU exception on CPU 0␛[0m
[00:00:00.509,948] ␛[1;31m<err> os: Current thread: 0x20003970 (unknown)␛[0m
[00:00:01.248,626] ␛[1;31m<err> os: Halting system␛[0m

[David]

Hello, were you able to resolve this?

I am having this seeing this problem with the same sd card chip. 

I am able to connect to SD if I use a segger fatfs example, but using the zephyr with nrf connect fails to mount SD.

[David]

Increasing stack size solved my problem:

CONFIG_MAIN_STACK_SIZE=4096

CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096

#
# Copyright (c) 2018 Nordic Semiconductor
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

# Enable the UART driver
CONFIG_UART_ASYNC_API=y
CONFIG_NRFX_UARTE0=y
CONFIG_SERIAL=y

CONFIG_GPIO=y

# Make sure printk is printing to the UART console
CONFIG_CONSOLE=y
CONFIG_PRINTK=y
CONFIG_UART_CONSOLE=n
CONFIG_RTT_CONSOLE=y

CONFIG_HEAP_MEM_POOL_SIZE=2048

CONFIG_BT=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DEVICE_NAME="Nordic_UART_Service"
CONFIG_BT_DEVICE_APPEARANCE=833
CONFIG_BT_MAX_CONN=1
CONFIG_BT_MAX_PAIRED=1

# Enable CONFIG_DISK_ACCESS_SPI_SDHCCONFIG_DISK_ACCESS_SPI_SDHCthe NUS service
CONFIG_BT_NUS=y

# Enable bonding
CONFIG_BT_SETTINGS=y
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y
CONFIG_NVS=y
CONFIG_SETTINGS=y

# Enable DK LED and Buttons library
CONFIG_DK_LIBRARY=y

# This example requires more workqueue stack
CONFIG_MAIN_STACK_SIZE=4096
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096

# Config logger
CONFIG_LOG=y
CONFIG_USE_SEGGER_RTT=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_BACKEND_UART=n

CONFIG_I2C=y
CONFIG_NRFX_TWI0=y

CONFIG_ASSERT=y

CONFIG_SPI=y
CONFIG_DISK_ACCESS=y
CONFIG_DISK_DRIVER_SDMMC=y
CONFIG_FILE_SYSTEM=y
CONFIG_FAT_FILESYSTEM_ELM=y
CONFIG_FS_FATFS_NUM_FILES=4
CONFIG_SPI_NRFX_RAM_BUFFER_SIZE=64