Posted on July 08, 2014 at 08:25Hello;
I am working on stm discovery. My aim is get output from speaker. I did it in main function. but i want to use SPI3 interrupt for send data. My codes in below. The code does not go to interrupt. I put breakpoint but its not work. I couldnt find my fault. Could anybody help me?
Thanks for your answers.
This is my codec init, its work fine when i send data to codec in main.
void codec_init()
{
GPIO_InitTypeDef PinInitStruct;
GPIO_StructInit(&PinInitStruct);
PinInitStruct.GPIO_Pin = CODEC_RESET_PIN;
PinInitStruct.GPIO_Mode = GPIO_Mode_OUT;
PinInitStruct.GPIO_PuPd = GPIO_PuPd_DOWN;
PinInitStruct.GPIO_OType = GPIO_OType_PP;
PinInitStruct.GPIO_Speed = GPIO_Speed_50MHz;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOD | RCC_AHB1Periph_GPIOB, ENABLE);
GPIO_Init(GPIOD, &PinInitStruct);
PinInitStruct.GPIO_Mode = GPIO_Mode_AF;
PinInitStruct.GPIO_OType = GPIO_OType_OD;
PinInitStruct.GPIO_Pin = I2C_SCL_PIN | I2C_SDA_PIN;
PinInitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
PinInitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &PinInitStruct);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_I2C1);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource9, GPIO_AF_I2C1);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1 | RCC_APB1Periph_SPI3, ENABLE);
RCC_PLLI2SCmd(ENABLE);
PinInitStruct.GPIO_OType = GPIO_OType_PP;
PinInitStruct.GPIO_Pin = I2S3_SCLK_PIN | I2S3_SD_PIN | I2S3_MCLK_PIN;
GPIO_Init(GPIOC, &PinInitStruct);
PinInitStruct.GPIO_Pin = I2S3_WS_PIN;
GPIO_Init(GPIOA, &PinInitStruct);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource4, GPIO_AF_SPI3);
GPIO_PinAFConfig(GPIOC, GPIO_PinSource7, GPIO_AF_SPI3);
GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_SPI3);
GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_SPI3);
//keep Codec off for now
GPIO_ResetBits(GPIOD, CODEC_RESET_PIN);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_3);
NVIC_InitStructure2.NVIC_IRQChannel = SPI3_IRQn;
NVIC_InitStructure2.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure2.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure2.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure2);
// configure I2S port
SPI_I2S_DeInit(CODEC_I2S);
I2S_InitType.I2S_AudioFreq = I2S_AudioFreq_16k;
I2S_InitType.I2S_MCLKOutput = I2S_MCLKOutput_Enable;
I2S_InitType.I2S_DataFormat = I2S_DataFormat_16b;
I2S_InitType.I2S_Mode = I2S_Mode_MasterTx;
I2S_InitType.I2S_Standard = I2S_Standard_Phillips;
I2S_InitType.I2S_CPOL = I2S_CPOL_Low;
I2S_Init(CODEC_I2S, &I2S_InitType);
I2S_FullDuplexConfig(I2S3ext, &I2S_InitType);
// configure I2C port
I2C_DeInit(CODEC_I2C);
I2C_InitType.I2C_ClockSpeed = 100000;
I2C_InitType.I2C_Mode = I2C_Mode_I2C;
I2C_InitType.I2C_OwnAddress1 = CORE_I2C_ADDRESS;
I2C_InitType.I2C_Ack = I2C_Ack_Enable;
I2C_InitType.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitType.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_Cmd(CODEC_I2C, ENABLE);
I2C_Init(CODEC_I2C, &I2C_InitType);
SPI_I2S_ITConfig(SPI3, SPI_I2S_IT_TXE, ENABLE);
}
void I2S3_IRQHANDLER(void) {
if(SPI_GetITStatus(SPI3, SPI_I2S_IT_TXE) != RESET)
{SPI_I2S_SendData(SPI3,Buffer[counter]);}
}
