因为是刚接触32位的GD芯片，折腾了几天，GD的DAC通过DMA方式还没有工作，求助各位高手，帮忙看看是哪里配置的问题，或者帮忙提供一个带DMA传输数据到DAC输出的例子也行，多谢了
void Audio_play(void)
{
/* Configure System Clocks */
RCC_Configuration();
/* NVIC configuration */
NVIC_Configuration();
/*Configure GPIO ports */
GPIO_Configuration();
/* Configure DAC */
TIMER_Configuration();
/*TIME Configuration*/
DAC_Configuration();
DACDMAConfig();
/* Start DAC1 conversion by software */
//DAC_SoftwareTrigger_Enable(DAC1,ENABLE);
Delay_1ms(3000);
}
void RCC_Configuration(void)
{
/* GPIOA Periph clock enable */
RCC_AHBPeriphClock_Enable(RCC_AHBPERIPH_GPIOA, ENABLE);
/* DAC Periph clock enable */
RCC_APB1PeriphClock_Enable(RCC_APB1PERIPH_DAC, ENABLE);
}
void NVIC_Configuration(void)
{
NVIC_InitPara NVIC_InitStructure;
/* Enable DMA1 IRQ Channel */
NVIC_InitStructure.NVIC_IRQ = DMA1_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQPreemptPriority = 0;
NVIC_InitStructure.NVIC_IRQSubPriority = 0;
NVIC_InitStructure.NVIC_IRQEnable = ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQ = DMA1_Channel2_3_IRQn;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQ = DMA1_Channel4_5_IRQn;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQ = DMA1_Channel6_7_IRQn;
NVIC_Init(&NVIC_InitStructure);
}
void GPIO_Configuration(void)
{
GPIO_InitPara GPIO_InitStructure;
/* GPIOA Periph clock enable */
RCC_AHBPeriphClock_Enable(RCC_AHBPERIPH_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_PIN_4;
GPIO_InitStructure.GPIO_Mode = GPIO_MODE_AN;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
void TIMER_Configuration(void)
{
TIMER_BaseInitPara TIMER_TimeBaseStructure;
//TIMER_OCInitPara TIMER_OCInitStructure; //not used now,qilei
/* TIMERS clock enable */
RCC_APB2PeriphClock_Enable(RCC_APB2PERIPH_TIMER1|RCC_APB2PERIPH_TIMER15|RCC_APB2PERIPH_TIMER16|RCC_APB2PERIPH_TIMER17,ENABLE);
RCC_APB1PeriphClock_Enable(RCC_APB1PERIPH_TIMER2|RCC_APB1PERIPH_TIMER3|RCC_APB1PERIPH_TIMER6|RCC_APB1PERIPH_TIMER14,ENABLE);
/* TIMER1 configuration */
TIMER_DeInit(TIMER6);
TIMER_TimeBaseStructure.TIMER_Prescaler = 1;
TIMER_TimeBaseStructure.TIMER_CounterMode = TIMER_COUNTER_UP;
TIMER_TimeBaseStructure.TIMER_Period = 0x8D0;
TIMER_TimeBaseStructure.TIMER_ClockDivision = TIMER_CDIV_DIV1; //0
//TIMER_TimeBaseStructure.TIMER_RepetitionCounter = 1;
TIMER_BaseInit(TIMER6,&TIMER_TimeBaseStructure);
/* TIMER1 Update DMA Request enable */
TIMER_DMACmd( TIMER6, TIMER_DMA_UPDATE, ENABLE);
TIMER_SelectOutputTrigger(TIMER6,TIMER_TRI_OUT_SRC_UPDATE);
/* TIMER enable counter*/
TIMER_Enable( TIMER6, ENABLE );
}
void DAC_Configuration(void)
{
DAC_InitPara DAC_InitStructure;
DAC_InitStructure.DAC_Trigger = DAC_TRIGGER_T6_TRGO;
DAC_InitStructure.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
DAC_Init(DAC1,&DAC_InitStructure);
/* Enable DAC1 */
DAC_Enable(DAC1,ENABLE);
/* Set DAC1_L8DHR register */
DAC_SetDAC1Data(DAC_ALIGN_8B_R, 0x7FF0);
DAC_DMA_Enable(DAC1,ENABLE);
}
void DACDMAConfig(void)
{
DMA_InitPara DMA_InitStructure;
RCC_AHBPeriphClock_Enable(RCC_AHBPERIPH_DMA1, ENABLE); //ÆôDMAʱÖÓ
/* DMA channel3 configuration **************************************/
DMA_DeInit(DMA1_CHANNEL3);
//DMA_InitStructure.DMA_Channel = DMA_Channel_7;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)DAC1_R8DHR_ADDRESS; //DAC_DHR12R2_ADDRESS;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&data; //wavedata2; //(uint32_t)&Sine12bit;
DMA_InitStructure.DMA_DIR = DMA_DIR_PERIPHERALSRC;//DMA_DIR_MemoryToPeripheral;
DMA_InitStructure.DMA_BufferSize = sizeof(data); //8294 - 46; //6030 - 46; //32;
DMA_InitStructure.DMA_PeripheralInc = DMA_PERIPHERALINC_DISABLE;//DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MEMORYINC_ENABLE;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PERIPHERALDATASIZE_BYTE;//DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MEMORYDATASIZE_BYTE; //DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_MODE_CIRCULAR;//comfirm,DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_PRIORITY_HIGH; //confirm,DMA_Priority_High;
DMA_InitStructure.DMA_MTOM = DMA_MEMTOMEM_DISABLE;
DMA_Init(DMA1_CHANNEL3, &DMA_InitStructure);
DAC_DMA_Enable(DAC1, ENABLE);
DAC_INTConfig(DAC1, ENABLE);
DMA_Enable(DMA1_CHANNEL3, ENABLE);
} |
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