OP运放配置如下: SYS->GPE_MFP = (SYS->GPE_MFP & ~(SYS_GPE_MFP_PE7MFP_Msk)) | SYS_GPE_MFP_PE7_OP2_P; SYS->GPE_MFP = (SYS->GPE_MFP & ~(SYS_GPE_MFP_PE6MFP_Msk)) | SYS_GPE_MFP_PE6_OP2_N; SYS->GPE_MFP = (SYS->GPE_MFP & ~(SYS_GPE_MFP_PE5MFP_Msk)) | SYS_GPE_MFP_PE5_OP2_O; GPIO_SetMode(PE, BIT7, GPIO_MODE_INPUT); GPIO_SetMode(PE, BIT6, GPIO_MODE_INPUT); GPIO_SetMode(PE, BIT5, GPIO_MODE_OUTPUT); PGA->OP_CTL |= OP2_ENABLE; |