AnsweredAssumed Answered

pads in i.MX8 QM MEK board dont work as expected

Question asked by Long Pham Employee on Aug 23, 2019
Latest reply on Aug 27, 2019 by Artur Petukhov

I encountered some problems when using some pads in IMX8QM MEK board as below:

 

#define SC_P_USDHC2_DATA0                        238  /*!< CONN.USDHC2.DATA0, DMA.UART4.RX, LSIO.GPIO5.IO26 */

#define SC_P_USDHC2_DATA1                        239  /*!< CONN.USDHC2.DATA1, DMA.UART4.TX, LSIO.GPIO5.IO27 */

#define SC_P_USDHC2_DATA2                        240  /*!< CONN.USDHC2.DATA2, DMA.UART4.CTS_B, LSIO.GPIO5.IO28 */

#define SC_P_USDHC2_DATA3                        241  /*!< CONN.USDHC2.DATA3, DMA.UART4.RTS_B, LSIO.GPIO5.IO29 */

 

When i configured those pads to UART mode but there is no UART signal comes out

 

When i tried configuring those pads to GPIO (GPIO5), i couldn't control the signal either. I did not observe the signal change when set the out put value from 0 to 1 and vice versa.

 

Note that our application running on M4, and those pads are assigned to M4 partition, core A35 does not run, only core M4 is running

Outcomes