Enabling SD Card in asset_tracker V1

[billywalton]

Hi

I am trying to get the SDHC/Disk access with FAT working on the nRF9160 dev platform and Asset_Tracker V1 app

It is shown to be connected on the TRACE connector

so P0.21 to P0.25 and the DBG_CMD going to U1B pin 125 if soldered

So I have bought the correct socket and soldered it down

I am only using the 9140 for this

In the config I turn on SDHC

and I have tried the following code added to the asset_tracker v1 app

#include <fs/fs.h>
#include <ff.h>
#include <disk/disk_access.h>

static FATFS fat_fs;
/* mounting info */
static struct fs_mount_t mp = {
	.type = FS_FATFS,
	.fs_data = &fat_fs,
};

static const char *disk_mount_pt = "/SD:";

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;
}

static void init_disk(void)
{
    /* raw disk i/o */
    do {
            static const char *disk_pdrv = "SD";
            uint64_t memory_size_mb;
            uint32_t block_count;
            uint32_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 = (uint64_t)block_count * block_size;
            printk("Memory Size(MB) %u\n", (uint32_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");
    }
}

void main(void)
{
	LOG_INF("Asset tracker started");
	k_work_q_start(&application_work_q, application_stack_area,
		       K_THREAD_STACK_SIZEOF(application_stack_area),
		       CONFIG_APPLICATION_WORKQUEUE_PRIORITY);
	if (IS_ENABLED(CONFIG_WATCHDOG)) {
		watchdog_init_and_start(&application_work_q);
	}

#if defined(CONFIG_USE_UI_MODULE)
	ui_init(ui_evt_handler);
#endif

#if defined(CONFIG_LWM2M_CARRIER)
	k_sem_take(&nrf_modem_lib_initialized, K_FOREVER);
#else
	handle_nrf_modem_lib_init_ret();
#endif


//TRY THE DISK
  init_disk();

	cloud_api_init();

	work_init();
	
	............

But I have no luck.

Do I also need to configure a SPI port in hal_nordic? and specify the pins in use somewhere?

Is there a working example of the SDCard socket being used anywhere that I can refer to?

[billywalton]

Hi Carl,

In the asset tracker folder, I have copied across the settings from the example in the link you sent to prj.conf

But where is the overlay file? or does the asset_tracker not have one?

The asset_tracker files:

I was imagining I could copy the data from the example overlay file into the asset_tracker overlay file and change the pin numbers appropriately

[Carl Richard]

Hi again!

The asset tracker does not have an overlay file and this must be added. For the nRF9160DK you can create a new file called "nrf9160dk_nrf9160ns.overlay" and add your desired configurations there. This will be included automatically next time you build the application (make sure to reopen the project in SES). Please notify me if you face any issues with this!

Best regards,
Carl Richard

[billywalton]

Hi Carl,

SDCard is now working, and it was the DBG_CMD pin causing the issues, as you mentioned it was already being used.

I need to free up all the analog ports, so i have the following

I am not using the nRF52

If i force the logic level of the analog switch being driven by nRF52 P1.12 to a 0, can you confirm that i would then be able to use these for pins within the nRF91 as i wish? or will i need to also configure the SDK in some way?

Thanks

[Carl Richard]

Good morning, Billy!

That's good to hear! You can route the pins of the DK using a device tree overlay. More details can be found in the nRF9160 DK - nRF52840 firmware documentation.

In this case I believe you can add the following to "nrf9160dk_nrf52840.overlay":

&vcom2_pins_routing {
        status = "disabled";
};

Best regards,
Carl Richard

[billywalton]

Good morning!

Great, so to confirm the process I need to:

1) "Open nRF Connect SDK project" and select nrf9160dk_nrf52840 project

2) Create an overlay in the folder called nrf9160dk_nrf52840.overlay disabling vcom2_pins_routing

3) Save and close solution

4) "Open nRF Connect SDK project" and select nrf9160dk_nrf52840 project, with clean build option ticked

5) Change the program switch position on the DK to nrf52840

6) Build and flash the project

7) Job done

Is that about correct?

Thanks again

Billy

[Carl Richard]

Hello!

Yes, that looks about correct! The project running on the nRF52840 can be anything really, but I think hello_world or something simple is good enough.

Looking at it like this I realize that the process is quite tedious, but alas, it's what works.

Best regards,
Carl Richard

[billywalton]

Hi Carl,

I am still having a battle with this board I'm afraid.

Still trying to toggle pin 0.28 from the nRF91 device

I have done the overlay for the nRF52 - seems to make no difference

So I cut the SB13 pad, disconnecting it from the mux:

now it only links directly to the nRF91 part

Using the following code:

struct device *dev;
dev = device_get_binding("GPIO_0");
gpio_pin_configure(dev, 28, GPIO_OUTPUT); 
gpio_pin_set(dev, 28, 1);

I cannot change the state of this pin in any way

Is there something else?

Thanks

Billy

[Carl Richard]

Hello again!

Could you try to disable the UART0 on the nRF9160? It's enabled by default and uses pin 28 as "rx-pin". It should be enough to the code below to the nrf9160dk_nrf9160.overlay file.

&uart0 {
	status = "disabled";
};

Best regards,
Carl Richard