本帖最后由 ecm1984 于 2021-9-2 10:54 编辑
使用 TIMER0_CH0 比较输出， DMA 通道是CH1 CH3 还是CH4 ？ 我现在3个都允许了
按第三步 设置了 通过 CHxIE/CHxDEN 位配置中断 /DMA 请求使能， 并没有请求DMA； 如果设置成 timer_dma_enable(TIMER0, TIMER_DMA_CH0D); 有DMA请求，但是我需要的是 每次比较完成请求DMA。
#include "gd32f3x0.h"
#include <stdio.h>
#define TIMER0_CH0CC (TIMER0+0x34)
#define TIMER0_CH1CC (TIMER0+0x38)
#define TIMER0_CH2CC (TIMER0+0x3C)
#define TIMER0_CH3CC (TIMER0+0x40)
uint16_t buffer0[4]={120,220, 620,650};
void gpio_config(void);
void timer_config(void);
void dma_config(void);
/*!
\brief configure the GPIO ports
\param[in] none
\param[out] none
\retval none
*/
void gpio_config(void)
{
rcu_periph_clock_enable(RCU_GPIOA);
/*configure PA8(TIMER0 CH0) as alternate function*/
gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_8);
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,GPIO_PIN_8);
gpio_af_set(GPIOA, GPIO_AF_2, GPIO_PIN_8);
/*configure PA9(TIMER0 CH1) as alternate function*/
gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_9);
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,GPIO_PIN_9);
gpio_af_set(GPIOA, GPIO_AF_2, GPIO_PIN_9);
/*configure PA10(TIMER0 CH2) as alternate function*/
gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_10);
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,GPIO_PIN_10);
gpio_af_set(GPIOA, GPIO_AF_2, GPIO_PIN_10);
/*configure PA11(TIMER0 CH3) as alternate function*/
gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_11);
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,GPIO_PIN_11);
gpio_af_set(GPIOA, GPIO_AF_2, GPIO_PIN_11);
}
/*!
\brief configure the DMA peripheral
\param[in] none
\param[out] none
\retval none
*/
void dma_config(void)
{
dma_parameter_struct dma_init_struct;
/* enable DMA clock */
rcu_periph_clock_enable(RCU_DMA);
#if 1
/* initialize DMA channel4 */
dma_deinit(DMA_CH4);
/* DMA channel4 initialize */
dma_deinit(DMA_CH4);
dma_init_struct.direction = DMA_MEMORY_TO_PERIPHERAL;
dma_init_struct.memory_addr = (uint32_t)buffer0;
dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
dma_init_struct.memory_width = DMA_MEMORY_WIDTH_16BIT;
dma_init_struct.number = 4;
dma_init_struct.periph_addr = (uint32_t)TIMER0_CH0CC;
dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
dma_init_struct.periph_width = DMA_PERIPHERAL_WIDTH_16BIT;
dma_init_struct.priority = DMA_PRIORITY_HIGH;
dma_init(DMA_CH4,dma_init_struct);
/* configure DMA mode */
dma_circulation_enable(DMA_CH4);
dma_memory_to_memory_disable(DMA_CH4);
/* enable DMA channel4 */
dma_channel_enable(DMA_CH4);
#endif
#if 1
/* initialize DMA channel3 */
dma_deinit(DMA_CH3);
/* DMA channel4 initialize */
dma_deinit(DMA_CH3);
dma_init_struct.direction = DMA_MEMORY_TO_PERIPHERAL;
dma_init_struct.memory_addr = (uint32_t)buffer0;
dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
dma_init_struct.memory_width = DMA_MEMORY_WIDTH_16BIT;
dma_init_struct.number = 4;
dma_init_struct.periph_addr = (uint32_t)TIMER0_CH0CC;
dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
dma_init_struct.periph_width = DMA_PERIPHERAL_WIDTH_16BIT;
dma_init_struct.priority = DMA_PRIORITY_HIGH;
dma_init(DMA_CH3,dma_init_struct);
/* configure DMA mode */
dma_circulation_enable(DMA_CH3);
dma_memory_to_memory_disable(DMA_CH3);
/* enable DMA channel4 */
dma_channel_enable(DMA_CH3);
#endif
#if 1
/* initialize DMA channel2 */
dma_deinit(DMA_CH1);
/* DMA channel4 initialize */
dma_deinit(DMA_CH1);
dma_init_struct.direction = DMA_MEMORY_TO_PERIPHERAL;
dma_init_struct.memory_addr = (uint32_t)buffer0;
dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
dma_init_struct.memory_width = DMA_MEMORY_WIDTH_16BIT;
dma_init_struct.number = 4;
dma_init_struct.periph_addr = (uint32_t)TIMER0_CH0CC;
dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
dma_init_struct.periph_width = DMA_PERIPHERAL_WIDTH_16BIT;
dma_init_struct.priority = DMA_PRIORITY_HIGH;
dma_init(DMA_CH3,dma_init_struct);
/* configure DMA mode */
dma_circulation_enable(DMA_CH1);
dma_memory_to_memory_disable(DMA_CH1);
/* enable DMA channel4 */
dma_channel_enable(DMA_CH1);
#endif
}
/*!
\brief configure the TIMER peripheral
\param[in] none
\param[out] none
\retval none
*/
void timer_config(void)
{
timer_oc_parameter_struct timer_ocintpara;
timer_parameter_struct timer_initpara;
rcu_periph_clock_enable(RCU_TIMER0);
timer_deinit(TIMER0);
/* TIMER0 configuration */
timer_initpara.prescaler = 83;
timer_initpara.alignedmode = TIMER_COUNTER_EDGE;
timer_initpara.counterdirection = TIMER_COUNTER_UP;
timer_initpara.period = 999;
timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
timer_initpara.repetitioncounter = 0;
timer_init(TIMER0,&timer_initpara);
/* CH0 configuration in PWM0 mode */
timer_ocintpara.outputstate = TIMER_CCX_ENABLE;
timer_ocintpara.outputnstate = TIMER_CCXN_ENABLE;
timer_ocintpara.ocpolarity = TIMER_OC_POLARITY_HIGH;
timer_ocintpara.ocnpolarity = TIMER_OCN_POLARITY_HIGH;
timer_ocintpara.ocidlestate = TIMER_OC_IDLE_STATE_HIGH;
timer_ocintpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;
timer_channel_output_config(TIMER0,TIMER_CH_0,&timer_ocintpara);
timer_channel_output_config(TIMER0,TIMER_CH_1,&timer_ocintpara);
timer_channel_output_config(TIMER0,TIMER_CH_2,&timer_ocintpara);
timer_channel_output_config(TIMER0,TIMER_CH_3,&timer_ocintpara);
timer_channel_output_pulse_value_config(TIMER0,TIMER_CH_0,120);
timer_channel_output_mode_config(TIMER0,TIMER_CH_0,TIMER_OC_MODE_TOGGLE);
timer_channel_output_shadow_config(TIMER0,TIMER_CH_0,TIMER_OC_SHADOW_DISABLE);
timer_channel_output_pulse_value_config(TIMER0,TIMER_CH_1,80);
timer_channel_output_mode_config(TIMER0,TIMER_CH_1,TIMER_OC_MODE_PWM0);
timer_channel_output_shadow_config(TIMER0,TIMER_CH_1,TIMER_OC_SHADOW_DISABLE);
timer_channel_output_pulse_value_config(TIMER0,TIMER_CH_2,80);
timer_channel_output_mode_config(TIMER0,TIMER_CH_2,TIMER_OC_MODE_PWM0);
timer_channel_output_shadow_config(TIMER0,TIMER_CH_2,TIMER_OC_SHADOW_DISABLE);
timer_channel_output_pulse_value_config(TIMER0,TIMER_CH_3,80);
timer_channel_output_mode_config(TIMER0,TIMER_CH_3,TIMER_OC_MODE_PWM0);
timer_channel_output_shadow_config(TIMER0,TIMER_CH_3,TIMER_OC_SHADOW_DISABLE);
/* TIMER0 primary output enable */
timer_primary_output_config(TIMER0,ENABLE);
/* TIMER0 update DMA request enable */
// timer_dma_enable(TIMER0,TIMER_DMA_UPD);
timer_dma_enable(TIMER0, TIMER_DMA_CH0D);
// timer_dma_enable(TIMER0, TIMER_DMA_CH1D);
// timer_dma_enable(TIMER0, TIMER_DMA_CH2D);
// timer_dma_enable(TIMER0, TIMER_DMA_CH3D);
timer_interrupt_enable(TIMER0, TIMER_INT_CH0);
/* auto-reload preload enable */
timer_auto_reload_shadow_enable(TIMER0);
/* TIMER0 counter enable */
timer_enable(TIMER0);
}
如果设置成 timer_dma_enable(TIMER0, TIMER_DMA_CH0D); 有DMA请求，但是我需要的是 每次比较完成请求DMA。
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