M4 Core1 debug uart customalization

[vinothkumars]

Hi,

I am working on IMX8QM Custom board which is don't have M4 debug UART (UART0_RTS_B and UART0_CTS_B).

So, I take it external connection from the Hardware lines (M41_I2C0_SDA, M41_I2C0_SCL) and configures those line as UART in Software

I configured M41_I2C0_SDA and M41_I2C0_SCL as debug UART (M41_UART0_TX, M41_UART0_RX) for DMA__LPUART2, But, debug uart is not working

sc_pad_set_all(ipc, SC_P_M41_I2C0_SCL, 1U, SC_PAD_CONFIG_NORMAL, SC_PAD_ISO_OFF, 0x0 ,SC_PAD_WAKEUP_OFF);/* 1 - M41_UART0_RX*/
sc_pad_set_all(ipc, SC_P_M41_I2C0_SDA, 1U, SC_PAD_CONFIG_NORMAL, SC_PAD_ISO_OFF, 0x0 ,SC_PAD_WAKEUP_OFF);/* 1 - M41_UART0_TX */

what are the things have to configure in board.h file for M41_I2C0_SCL/ M41_I2C0_SDA

#define BOARD_DEBUG_UART_BASEADDR (uint32_t) DMA__LPUART2
#define BOARD_DEBUG_UART_INSTANCE 4U
#define BOARD_DEBUG_UART_SC_RSRC SC_R_UART_2
#define BOARD_DEBUG_UART_CLKSRC kCLOCK_DMA_Lpuart2
#define BOARD_UART_IRQ DMA_UART2_INT_IRQn
#define BOARD_UART_IRQ_HANDLER DMA_UART2_INT_IRQHandler

Note: Make these pad as movable already
rm_set_pad_movable(pt_boot, SC_P_M41_I2C0_SCL, SC_P_M41_I2C0_SCL, SC_TRUE));
rm_set_pad_movable(pt_boot, SC_P_M41_I2C0_SDA, SC_P_M41_I2C0_SDA, SC_TRUE));


Let me know what are the things I have to configure in board.h for new debug uart

[igorpadykov]

Hi Vinothkumar

for changing debug uart one can look at example on

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/Use-UART0-RX-TX-as-SCU-UART-debug-port-o...

Best regards
igor

[vinothkumars]

Thank you @igorpadykov 

That is for SCU debug UART. I am looking for M4 Core1 UART to use in Free RTOS SDK application ( Rear View Camera). So, that link will not help to achieve this.

[igorpadykov]

Hi Vinothkumar

sorry, "Rear View Camera" as part of Android Automotive is supported through

NXP Professional Services as described on below link

https://www.nxp.com/design/software/embedded-software/software-technology-for-android-auto:ANDROID-A...

 

Best regards
igor

[vinothkumars · Accepted solution]

It is working after configure debug uart in  board.h.