在使用ch32v307vct6的fsmc接口范圍fpga的sram,由于需要用到高速的USB占用了PB7引腳,然后想把PD2復用為FSMC_NADV功能,使用示波器看PD2一直是高電平,需要怎么處理???
說明:芯片的批次為31102FE8支持FSMC_NADV,已查看FSMCEN=1&USBHSEN=1 &RB_UC_RST_SIE=0&FSMC_NADV=1 的寄存器的值,滿足文檔里面的要求;
int?fsmc_sram_init(void) { ????FSMC_NORSRAMInitTypeDef?FSMC_NORSRAMInitStructure?=?{0}; ????FSMC_NORSRAMTimingInitTypeDef??readWriteTiming?=?{0}; ????GPIO_InitTypeDef?GPIO_InitStructure?=?{0}; ????RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO?|?RCC_APB2Periph_GPIOD,?ENABLE); ????RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC,?ENABLE); ????/*?FSMC_NADV?*/ ????GPIO_PinRemapConfig(GPIO_Remap_FSMC_NADV,?ENABLE); ????GPIO_InitStructure.GPIO_Pin?=?GPIO_Pin_2?|?GPIO_Pin_13; ????GPIO_InitStructure.GPIO_Mode?=?GPIO_Mode_AF_PP; ????GPIO_InitStructure.GPIO_Speed?=?GPIO_Speed_50MHz; ????GPIO_Init(GPIOD,?&GPIO_InitStructure); ????GPIO_InitStructure.GPIO_Pin?=?GPIO_Pin_0?|?GPIO_Pin_1?|?GPIO_Pin_4?|?GPIO_Pin_5?|?GPIO_Pin_8?|?GPIO_Pin_9?|?GPIO_Pin_10?|?GPIO_Pin_11?|?GPIO_Pin_12?|?GPIO_Pin_14?|?GPIO_Pin_15; ????GPIO_Init(GPIOD,?&GPIO_InitStructure); ????GPIO_InitStructure.GPIO_Pin?=?GPIO_Pin_0?|?GPIO_Pin_1?|?GPIO_Pin_7?|?GPIO_Pin_8?|?GPIO_Pin_9?|?GPIO_Pin_10?|?GPIO_Pin_11?|?GPIO_Pin_12?|?GPIO_Pin_13?|?GPIO_Pin_14?|?GPIO_Pin_15; ????GPIO_Init(GPIOE,?&GPIO_InitStructure); ????//?FSMC_NORSRAMStructInit(&FSMC_NORSRAMInitStructure); ????readWriteTiming.FSMC_AddressSetupTime?=?0x01; ????readWriteTiming.FSMC_AddressHoldTime?=?0x00; ????readWriteTiming.FSMC_DataSetupTime?=?0x03; ????readWriteTiming.FSMC_BusTurnAroundDuration?=?0x00; ????readWriteTiming.FSMC_AccessMode?=?FSMC_AccessMode_A; ????FSMC_NORSRAMInitStructure.FSMC_Bank?=?FSMC_Bank1_NORSRAM1; ????FSMC_NORSRAMInitStructure.FSMC_DataAddressMux?=?FSMC_DataAddressMux_Enable; ????FSMC_NORSRAMInitStructure.FSMC_MemoryType?=?FSMC_MemoryType_SRAM; ????FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth?=?FSMC_MemoryDataWidth_16b; ????FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode?=?FSMC_BurstAccessMode_Disable; ????FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity?=?FSMC_WaitSignalPolarity_Low; ????FSMC_NORSRAMInitStructure.FSMC_AsynchronousWait?=?FSMC_AsynchronousWait_Enable; ????FSMC_NORSRAMInitStructure.FSMC_WrapMode?=?FSMC_WrapMode_Disable; ????FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive?=?FSMC_WaitSignalActive_BeforeWaitState; ????FSMC_NORSRAMInitStructure.FSMC_WriteOperation?=?FSMC_WriteOperation_Enable; ????FSMC_NORSRAMInitStructure.FSMC_WaitSignal?=?FSMC_WaitSignal_Disable; ????FSMC_NORSRAMInitStructure.FSMC_ExtendedMode?=?FSMC_ExtendedMode_Enable; ????FSMC_NORSRAMInitStructure.FSMC_WriteBurst?=?FSMC_WriteBurst_Disable; ????FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct?=?&readWriteTiming; ????FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct?=?&readWriteTiming; ????FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure); ????FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM1,?ENABLE); ????return?0; }
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