GD32H759 定时器触发+DMA控制任意IO做PWM和脉冲数控制

只看该作者 · 2025-3-11 08:47

在使用GD32H759的定时器出发DMA搬数据到GPIO的BOP寄存器来控制GPIO的翻转做PWM和脉冲数的控制。DMA能进入传输完成中断，但是并没有把数据搬运到GPIO的BOP寄存器使GPIO口翻转。不知道是什么原因。有没有大神解答下的，万分感谢！代码如下：
const uint32_t vPulse_Data[17] = {0x00080004,0x00040008,0x00080004,0x00040008,0x00080004,0x00040008,0x00080004,0x00040008,
      0x00080004,0x00040008,0x00080004,0x00040008,0x00080004,0x00040008,0x00080004,0x00040008,
      0x0000000C};/*PD2,PD3  U pluse*/
void pwm_gpio_config(void)
{
rcu_periph_clock_enable(RCU_GPIOD);

/* LED0引脚模式设置 */
gpio_mode_set(GPIOD, GPIO_MODE_OUTPUT, GPIO_PUPD_PULLUP, GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3 \
   |GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_6|GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11);
gpio_output_options_set(GPIOD, GPIO_OTYPE_PP, GPIO_OSPEED_60MHZ, GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3 \
   |GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_6|GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11);
gpio_port_write(GPIOD,0x0000);
}

/*!
\brief    configure the DMA peripheral
\param[in]  none
\param[out] none
\retval    none
*/
void time2_dma_config(void)
{
/* ADC_DMA_channel configuration */
dma_single_data_parameter_struct dma_single_data_parameter;

rcu_periph_clock_enable(RCU_DMA0);
nvic_priority_group_set(NVIC_PRIGROUP_PRE4_SUB0);
nvic_irq_enable(DMA0_Channel2_IRQn, 1, 0);

/* ADC DMA_channel configuration */
dma_deinit(DMA0, DMA_CH2);

/* initialize DMA single data mode */
dma_single_data_parameter.request = DMA_REQUEST_TIMER2_UP;
dma_single_data_parameter.periph_addr = (uint32_t)&GPIO_BOP(GPIOD);
dma_single_data_parameter.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
dma_single_data_parameter.memory0_addr = (uint32_t)(vPulse_Data);
dma_single_data_parameter.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
dma_single_data_parameter.periph_memory_width = DMA_PERIPH_WIDTH_32BIT;
dma_single_data_parameter.direction = DMA_MEMORY_TO_PERIPH;
dma_single_data_parameter.number = 17;
dma_single_data_parameter.priority = DMA_PRIORITY_HIGH;
dma_single_data_parameter.circular_mode = DMA_CIRCULAR_MODE_DISABLE;
dma_single_data_mode_init(DMA0, DMA_CH2, &dma_single_data_parameter);

/* enable DMA circulation mode */
dma_circulation_disable(DMA0, DMA_CH2);

dma_interrupt_enable(DMA0, DMA_CH2, DMA_INT_FTF);

/* enable DMA channel */
// dma_channel_enable(DMA0, DMA_CH2);

}

void timer2_config(uint32_t freq_hz)
{
rcu_periph_clock_enable(RCU_TIMER2);

timer_parameter_struct timer_initpara;
timer_struct_para_init(&timer_initpara);

timer_initpara.prescaler = 0; // 无分频，时钟=300MHz
timer_initpara.alignedmode = TIMER_COUNTER_EDGE;
timer_initpara.counterdirection = TIMER_COUNTER_UP;

timer_initpara.period = (300000000 / freq_hz / 2) - 1; // 自动重载值
timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
timer_init(TIMER2, &timer_initpara);

timer_auto_reload_shadow_enable(TIMER2);

// 启用更新事件DMA请求
timer_dma_enable(TIMER2, TIMER_DMA_UPD);

timer_enable(TIMER2);
}

void DMA0_Channel2_IRQHandler(void)
{
if(RESET != dma_interrupt_flag_get(DMA0, DMA_CH2, DMA_INT_FLAG_FTF))
{
        dma_interrupt_flag_clear(DMA0, DMA_CH2, DMA_INT_FLAG_FTF);
timer_disable(TIMER2);
dma_channel_disable(DMA0, DMA_CH2);

}
}

只看该作者 · 2025-3-11 10:53

已经找到原因了。可以生成可控制数量的脉冲了