急急STM32F446 I2S 无时钟输出

2019-07-20 05:34发布

从407 移植到STM32F446，两天了I2S一直没时钟出来。求大神帮忙。 // clock setting RCC_PLLI2SConfig(16, 334, 2, 7, 7); RCC_I2SCLKConfig(RCC_I2SBus_APB1, RCC_I2SCLKSource_PLLI2S); RCC_I2SCLKConfig(RCC_I2SBus_APB2, RCC_I2SCLKSource_PLLI2S); RCC_PLLI2SCmd(ENABLE); while(RCC_GetFlagStatus(RCC_FLAG_PLLI2SRDY) == RESET); u8 I2S1_GPIO_Init(void){ u8 res; GPIO_InitTypeDef GPIO_InitStructure; RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;// GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;// GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;// GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;// GPIO_Init(GPIOA, &GPIO_InitStructure);// GPIO_PinAFConfig(GPIOA,GPIO_PinSource4,GPIO_AF_SPI1); // GPIO_PinAFConfig(GPIOA,GPIO_PinSource5,GPIO_AF_SPI1); // GPIO_PinAFConfig(GPIOA,GPIO_PinSource7,GPIO_AF_SPI1); // return 0;} void I2S1_Init(u16 I2S_Standard, u16 I2S_Mode, u16 I2S_Clock_Polarity, u16 I2S_DataFormat){ I2S_InitTypeDef I2S_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE); RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, ENABLE); RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, DISABLE); I2S_InitStructure.I2S_Mode = I2S_Mode; I2S_InitStructure.I2S_Standard = I2S_Standard; I2S_InitStructure.I2S_DataFormat = I2S_DataFormat; I2S_InitStructure.I2S_MCLKOutput = I2S_MCLKOutput_Disable; I2S_InitStructure.I2S_AudioFreq = I2S_AudioFreq_Default; I2S_InitStructure.I2S_CPOL = I2S_Clock_Polarity; I2S_Init(SPI1, &I2S_InitStructure); / SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Rx, ENABLE); I2S_Cmd(SPI1, ENABLE); } ...void main(void){ I2S1_GPIO_Init();I2S1_Init(I2S_Standard_Phillips,I2S_Mode_MasterRx,I2S_CPOL_Low,I2S_DataFormat_16b); while (1) { asm("nop"); }}

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