去查設定後暫存器的值,是有吻合以下的規則
* |[15] |PB4_MFP1 |PB.4 Pin Alternate Function Selection
* | | |The pin function depends on GPB_MFP[4] and PB4_MFP1 (ALT_MFP[15]).
* | | |(PB4_MFP1(ALT_MFP[15]), GPB_MFP[4]) value and function mapping is as following list.
* | | |(0, 0) = GPIO function is selected.
* | | |(0, 1) = UART1_RXD function is selected.
* | | |(1, 0) = SPI2_SS0 function is selected.
* | | |(1, 1) = SPI1_SS1 function is selected.
請問還要檢查哪個部份? |