nRF52832 SD Card with nRFConnect SDK v1.9.1

RE: nRF52832 SD Card with nRFConnect SDK v1.9.1

dejans — Fri, 05 Aug 2022 08:21:58 GMT

Hi,

Thank you for sharing your solution. I am glad that it worked out well for you.

There is just one small question regarding your device tree &spi1. It seems to be the same as the original one. Which change was required?

Best regards,
Dejan

RE: nRF52832 SD Card with nRFConnect SDK v1.9.1

Kerem — Wed, 03 Aug 2022 15:16:13 GMT

Hi,

I have found the problem, first, changed the device tree to

&spi1 {
	compatible = "nordic,nrf-spi";
	status = "okay";
	sck-pin = <19>;
	mosi-pin = <24>;
	miso-pin = <22>;
	miso-pull-up;

	cs-gpios = <&gpio0 23 GPIO_ACTIVE_LOW>;

	sdhc0: sdhc@0 {
			compatible = "zephyr,mmc-spi-slot";
			reg = <0x0>;
			status = "okay";
			label = "SDHC0";
			spi-max-frequency = <24000000>;
	};
};

And the supply voltage of the SD Card module to 5V. Appearently, the modules having AMS1117-3.3 LDO's (or similar) may not work with 3.3Volt supply instead of 5V due to voltage dropout. These modules also houses a data buffer which is not the issue where the dropped out voltage is actually sufficent to run the buffer IC. I think the SDCard might be the issue here when using lower voltages.

RE: nRF52832 SD Card with nRFConnect SDK v1.9.1

dejans — Fri, 29 Jul 2022 11:34:37 GMT

Hi,

Is there anything else connected to SPI1 bus?

Have you tried removing another peripheral from SPI0 and connecting SD card to SPI0?

Best regards,
Dejan