iMX8 Cortex M7 SPI with SDMA

frank9 — Thu, 19 Oct 2023 18:44:01 GMT

Encountered an issue after trying to enable SPI with SDMA for Cortex M7 on the 8MPLUSLPD4-EVK. I believed I followed the SDMA example that came with the IMX8 (found in below path).

I am using FreeRTOS. The build appears to be having difficulty in running loaded ROM script. It gets stuck in the below while loop. Also below is call stack. Any thoughts to what could be wrong with my setup?

Re: iMX8 Cortex M7 SPI with SDMA

Zhiming_Liu — Mon, 23 Oct 2023 03:39:57 GMT

Hi @frank9

You can find rdc config in uboot dts: arch/arm/dts/imx8mp-evk-u-boot.dtsi

mcu_rdc { compatible = "imx8m,mcu_rdc"; /* rdc config when MCU starts * master * SDMA3p --> domain 1 * SDMA3b --> domian 1 * SDMA3_SPBA2 --> domian 1 * peripheral: * SAI3 --> Only Domian 1 can access * UART4 --> Only Domian 1 can access * GPT1 --> Only Domian 1 can access * SDMA3 --> Only Domian 1 can access * I2C3 --> Only Domian 1 can access * memory: * TCM --> Only Domian 1 can access (0x7E0000~0x81FFFF) * DDR --> Only Domian 1 can access (0x80000000~0x81000000) * end. */

You don't have ecspi sdma1 permission with default rdc config. Please try to add sdma1 config in imx8mp-evk-u-boot.dtsi.

topic Re: iMX8 Cortex M7 SPI with SDMA in i.MX Processors

iMX8 Cortex M7 SPI with SDMA

Re: iMX8 Cortex M7 SPI with SDMA