#define BUFFER_SIZE 512
#define ADC_CHANNEL_CNT 3
#define DMA_BUFFER_SIZE (ADC_CHANNEL_CNT * BUFFER_SIZE)
uint16_t adc_buffer0[DMA_BUFFER_SIZE];
uint16_t adc_buffer1[DMA_BUFFER_SIZE];
void User_DMA_Init(void)
{
dma_single_data_parameter_struct dma_init_struct;
dma_deinit(DMA1, DMA_CH0);
dma_init_struct.periph_addr = (uint32_t)&ADC_RDATA(ADC0);
dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
dma_init_struct.memory0_addr = (uint32_t)&adc_buffer0[0];
dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
dma_init_struct.periph_memory_width = DMA_PERIPH_WIDTH_16BIT;
dma_init_struct.direction = DMA_PERIPH_TO_MEMORY;
dma_init_struct.number = ADC_CHANNEL_CNT * BUFFER_SIZE;
dma_init_struct.priority = DMA_PRIORITY_ULTRA_HIGH;
dma_single_data_mode_init(DMA1, DMA_CH0, &dma_init_struct);
dma_channel_subperipheral_select(DMA1, DMA_CH0, DMA_SUBPERI0);
/* 启用双缓冲 */
dma_memory_address_config(DMA1, DMA_CH0, (uint32_t)&adc_buffer1[0], DMA_MEMORY_1);
dma_switch_buffer_mode_enable(DMA1, DMA_CH0, ENABLE);
dma_circulation_disable(DMA1, DMA_CH0);
dma_channel_enable(DMA1, DMA_CH0);
/* 开启DMA传输完成中断 */
dma_interrupt_enable(DMA1, DMA_CH0, DMA_INT_HTF);
nvic_irq_enable(DMA1_Channel0_IRQn, 1, 0);
}
void TIMER1_IRQHandler(void)
{
if (SET == timer_interrupt_flag_get(TIMER1, TIMER_INT_FLAG_UP)) {
// __disable_irq();
uint16_t *active_buffer = (dma_current_buffer == 0) ? adc_buffer1 : adc_buffer0;
if (sample_Flag == 0) {
sample_Flag = 1;
sample_count = 0;
}
if (sample_Flag == 1 && buffer_ready_flag) {
buffer_ready_flag = 0;
for (int i = 0; i < BUFFER_SIZE; i++) {
adc_table.CurVol[sample_count].cur = active_buffer[i * 3 + 0] - active_buffer[i * 3 + 2];
adc_table.CurVol[sample_count].vol = active_buffer[i * 3 + 1] - active_buffer[i * 3 + 2];
sample_count++;
}
if (sample_count >= 512) {
sample_Flag = 2; // 表示采集完了
sample_count = 0;
}
}
// __enable_irq();
T_counts++;
timer_interrupt_flag_clear(TIMER1, TIMER_INT_FLAG_UP);
}
}
void DMA1_Channel0_IRQHandler(void)
{
if (dma_interrupt_flag_get(DMA1, DMA_CH0, DMA_INT_FLAG_HTF)==SET) {
dma_interrupt_flag_clear(DMA1, DMA_CH0, DMA_INT_FLAG_HTF);
dma_current_buffer = (dma_current_buffer == 0) ? 1 : 0;
buffer_ready_flag = 1;
}
}
能不能不要删帖子了,为什么adc_buffer0值可以更新,buffer1值不能更新? |