AM3352: SPI溝通問題

Hi Expert,

目前AM3352 SPI溝通上遇到問題，請問您有沒有甚麼建議?

AM3352設定值如下
AM33XX_IOPAD(0x8f0,  PIN_OUTPUT_PULLDOWN | MUX_MODE7) /* F17, FLASH_WP */
AM33XX_IOPAD(0x950, PIN_INPUT_PULLUP | MUX_MODE0) /* A17, SPI_CLK */
AM33XX_IOPAD(0x954, PIN_INPUT_PULLUP | MUX_MODE0) /* B17, SPI_MISO */
AM33XX_IOPAD(0x958, PIN_OUTPUT_PULLUP | MUX_MODE0) /* B16, SPI_MOSI */
AM33XX_IOPAD(0x95c, PIN_OUTPUT_PULLUP | MUX_MODE0) /* A16, SPI_CS */

波型如下

Thanks

Daniel