【"RV-STAR 开发板免费试用"免费试用】+ADC单通道、多通道规则组 DMA 采样

ti

今天在昨天的ADC最简配置例子上，进行DMA和多通道的采样配置。
下面例程均基于规则通道，注入通道与这个有些许差异，需自己查看手册配置。

单通道DMA软件触发采样配置：

void gd_rvstar_adc_dma_init(void)
{
/* ADC_DMA_channel configuration */
dma_parameter_struct dma_data_parameter;
/* enable GPIOC clock */
rcu_periph_clock_enable(RCU_GPIOC);
/* enable ADC0 clock */
rcu_periph_clock_enable(RCU_ADC0);
/* enable DMA0 clock */
rcu_periph_clock_enable(RCU_DMA0);
/* config ADC clock */
rcu_adc_clock_config(RCU_CKADC_CKAPB2_DIV8);
//GPIO 配置
/* config the GPIO as analog mode PC0 */
gpio_init(GPIOC, GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, GPIO_PIN_0);
//ADC配置
/* reset ADC */
adc_deinit(ADC0);
/* ADC mode config 配置转换速度*/
adc_mode_config(ADC0,ADC_MODE_FREE);
/* ADC continous function disable 不允许连续转换 */
adc_special_function_config(ADC0, ADC_SCAN_MODE, DISABLE);
/* ADC data alignment config 数据对其格式*/
adc_data_alignment_config(ADC0, ADC_DATAALIGN_RIGHT);
/* ADC channel length config */
adc_channel_length_config(ADC0, ADC_REGULAR_CHANNEL, 1);
/* ADC regular channel config 配置转换通道 */
adc_regular_channel_config(ADC0, 0, ADC_CHANNEL_10, ADC_SAMPLETIME_55POINT5);
/* ADC trigger config 软件触发*/
adc_external_trigger_source_config(ADC0, ADC_REGULAR_CHANNEL, ADC0_1_EXTTRIG_REGULAR_NONE);
/* ADC external trigger enable */
adc_external_trigger_config(ADC0, ADC_REGULAR_CHANNEL, ENABLE);
/* ADC discontinuous mode */
adc_discontinuous_mode_config(ADC0, ADC_REGULAR_CHANNEL, 3);
/* enable ADC interface */
adc_enable(ADC0);
delay_1ms(1);
/* ADC calibration and reset calibration */
adc_calibration_enable(ADC0);
delay_1ms(1);
/* ADC DMA function enable */
adc_dma_mode_enable(ADC0);
//DMA配置
/* ADC DMA_channel configuration */
dma_deinit(DMA0, DMA_CH0);
/* initialize DMA single data mode */
dma_data_parameter.periph_addr = (uint32_t)(&ADC_RDATA(ADC0));
dma_data_parameter.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
dma_data_parameter.memory_addr = (uint32_t)(&adc_value);
dma_data_parameter.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
//dma_data_parameter.memory_inc = DMA_MEMORY_INCREASE_DISABLE;
dma_data_parameter.periph_width = DMA_PERIPHERAL_WIDTH_16BIT;
dma_data_parameter.memory_width = DMA_MEMORY_WIDTH_16BIT;
dma_data_parameter.direction = DMA_PERIPHERAL_TO_MEMORY;
dma_data_parameter.number = 1;//仅开了一个通道
dma_data_parameter.priority = DMA_PRIORITY_HIGH;
dma_init(DMA0, DMA_CH0, &dma_data_parameter);
dma_circulation_enable(DMA0, DMA_CH0);
/* enable DMA channel */
dma_channel_enable(DMA0, DMA_CH0);
}

复制代码

main函数里面的修改：
gd_rvstar_adc_dma_init();
while 里面添加：
adc_software_trigger_enable(ADC0, ADC_REGULAR_CHANNEL);
//delay_1us(10);
printf("rn ADC0 regular channel 10 data = %d rn",adc_value);
delay_1ms(1000);
编译下载现象：

///////////////////////////////////////////////////////////////////////////
下面进行多通道DMA 软件触发配置
引脚选用PC0~PC5共6个，与ardunio扩展引脚对应。

void gd_rvstar_adc_group_dma_init(void)
{
/* ADC_DMA_channel configuration */
dma_parameter_struct dma_data_parameter;
/* enable GPIOC clock */
rcu_periph_clock_enable(RCU_GPIOC);
/* enable ADC0 clock */
rcu_periph_clock_enable(RCU_ADC0);
/* enable DMA0 clock */
rcu_periph_clock_enable(RCU_DMA0);
/* config ADC clock */
rcu_adc_clock_config(RCU_CKADC_CKAPB2_DIV8);
//GPIO 配置
/* config the GPIO as analog mode PC0 */
gpio_init(GPIOC, GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, GPIO_PIN_0);
gpio_init(GPIOC, GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, GPIO_PIN_1);
gpio_init(GPIOC, GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, GPIO_PIN_2);
gpio_init(GPIOC, GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, GPIO_PIN_3);
gpio_init(GPIOC, GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, GPIO_PIN_4);
gpio_init(GPIOC, GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, GPIO_PIN_5);
//ADC配置
/* reset ADC */
adc_deinit(ADC0);
/* ADC mode config 配置转换速度*/
adc_mode_config(ADC0,ADC_MODE_FREE);
/* ADC continous function disable 不允许连续转换 */
adc_special_function_config(ADC0, ADC_SCAN_MODE, DISABLE);
/* ADC data alignment config 数据对其格式*/
adc_data_alignment_config(ADC0, ADC_DATAALIGN_RIGHT);
/* ADC channel length config */
adc_channel_length_config(ADC0, ADC_REGULAR_CHANNEL, 6);
/* ADC regular channel config 配置转换通道 */
adc_regular_channel_config(ADC0, 0, ADC_CHANNEL_10, ADC_SAMPLETIME_55POINT5);
adc_regular_channel_config(ADC0, 1, ADC_CHANNEL_11, ADC_SAMPLETIME_55POINT5);
adc_regular_channel_config(ADC0, 2, ADC_CHANNEL_12, ADC_SAMPLETIME_55POINT5);
adc_regular_channel_config(ADC0, 3, ADC_CHANNEL_13, ADC_SAMPLETIME_55POINT5);
adc_regular_channel_config(ADC0, 4, ADC_CHANNEL_14, ADC_SAMPLETIME_55POINT5);
adc_regular_channel_config(ADC0, 5, ADC_CHANNEL_15, ADC_SAMPLETIME_55POINT5);
/* ADC trigger config 软件触发*/
adc_external_trigger_source_config(ADC0, ADC_REGULAR_CHANNEL, ADC0_1_EXTTRIG_REGULAR_NONE);
/* ADC external trigger enable */
adc_external_trigger_config(ADC0, ADC_REGULAR_CHANNEL, ENABLE);
/* ADC discontinuous mode */
adc_discontinuous_mode_config(ADC0, ADC_REGULAR_CHANNEL, 3);
/* enable ADC interface */
adc_enable(ADC0);
delay_1ms(1);
/* ADC calibration and reset calibration */
adc_calibration_enable(ADC0);
delay_1ms(1);
/* ADC DMA function enable */
adc_dma_mode_enable(ADC0);
//DMA配置
/* ADC DMA_channel configuration */
dma_deinit(DMA0, DMA_CH0);
/* initialize DMA single data mode */
dma_data_parameter.periph_addr = (uint32_t)(&ADC_RDATA(ADC0));
dma_data_parameter.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
dma_data_parameter.memory_addr = (uint32_t)(&adc_group_value);
dma_data_parameter.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
//dma_data_parameter.memory_inc = DMA_MEMORY_INCREASE_DISABLE;
dma_data_parameter.periph_width = DMA_PERIPHERAL_WIDTH_16BIT;
dma_data_parameter.memory_width = DMA_MEMORY_WIDTH_16BIT;
dma_data_parameter.direction = DMA_PERIPHERAL_TO_MEMORY;
dma_data_parameter.number = 6;//
dma_data_parameter.priority = DMA_PRIORITY_HIGH;
dma_init(DMA0, DMA_CH0, &dma_data_parameter);
dma_circulation_enable(DMA0, DMA_CH0);
/* enable DMA channel */
dma_channel_enable(DMA0, DMA_CH0);
}

复制代码

mian函数里面：
gd_rvstar_adc_dma_init();
while 里面修改：

// ADC 规则组软件触发 DMA
adc_software_trigger_enable(ADC0, ADC_REGULAR_CHANNEL);
//delay_1us(10);
printf("rn ADC0 regular channel 10 data = %d rn",adc_group_value[0]);
printf("rn ADC0 regular channel 11 data = %d rn",adc_group_value[1]);
printf("rn ADC0 regular channel 12 data = %d rn",adc_group_value[2]);
printf("rn ADC0 regular channel 13 data = %d rn",adc_group_value[3]);
printf("rn ADC0 regular channel 14 data = %d rn",adc_group_value[4]);
printf("rn ADC0 regular channel 15 data = %d rn",adc_group_value[5]);
delay_1ms(1000);

复制代码

////////////////////////////////////////////////////////////////////////////////////////////
多通道DMA定时器PWM触发：

void gd_rvstar_adc_group_dma_regular_timer1ch1_init(void)
{
timer_oc_parameter_struct timer_ocintpara;
timer_parameter_struct timer_initpara;
/* ADC_DMA_channel configuration */
dma_parameter_struct dma_data_parameter;
/* enable GPIOC clock */
rcu_periph_clock_enable(RCU_GPIOC);
/* enable ADC0 clock */
rcu_periph_clock_enable(RCU_ADC0);
/* enable timer1 clock */
rcu_periph_clock_enable(RCU_TIMER1);
/* enable DMA0 clock */
rcu_periph_clock_enable(RCU_DMA0);
/* config ADC clock */
rcu_adc_clock_config(RCU_CKADC_CKAPB2_DIV8);
//GPIO 配置
/* config the GPIO as analog mode PC0 */
gpio_init(GPIOC, GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, GPIO_PIN_0);
gpio_init(GPIOC, GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, GPIO_PIN_1);
gpio_init(GPIOC, GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, GPIO_PIN_2);
gpio_init(GPIOC, GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, GPIO_PIN_3);
gpio_init(GPIOC, GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, GPIO_PIN_4);
gpio_init(GPIOC, GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, GPIO_PIN_5);
//TIMER1_CH1 PWM设置
timer_deinit(TIMER1);
/* TIMER1 configuration */
timer_initpara.prescaler = 5;
timer_initpara.alignedmode = TIMER_COUNTER_EDGE;
timer_initpara.counterdirection = TIMER_COUNTER_UP;
timer_initpara.period = 199;
timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
timer_initpara.repetitioncounter = 0;
timer_init(TIMER1,&timer_initpara);
/* CH1 configuration in PWM mode1 */
timer_channel_output_struct_para_init(&timer_ocintpara);
timer_ocintpara.ocpolarity = TIMER_OC_POLARITY_LOW;
timer_ocintpara.outputstate = TIMER_CCX_ENABLE;
timer_channel_output_config(TIMER1, TIMER_CH_1, &timer_ocintpara);
timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_1, 100);
timer_channel_output_mode_config(TIMER1, TIMER_CH_1, TIMER_OC_MODE_PWM1);
timer_channel_output_shadow_config(TIMER1, TIMER_CH_1, TIMER_OC_SHADOW_DISABLE);
/* auto-reload preload enable */
timer_auto_reload_shadow_enable(TIMER1);
timer_enable(TIMER1);
//ADC配置
/* reset ADC */
adc_deinit(ADC0);
/* ADC mode config 配置转换速度*/
adc_mode_config(ADC0,ADC_MODE_FREE);
/* ADC contineous function enable */
adc_special_function_config(ADC0, ADC_CONTINUOUS_MODE, DISABLE);
/* ADC continous function disable 不允许连续转换 */
adc_special_function_config(ADC0, ADC_SCAN_MODE, DISABLE);
/* ADC data alignment config 数据对其格式*/
adc_data_alignment_config(ADC0, ADC_DATAALIGN_RIGHT);
/* ADC channel length config */
adc_channel_length_config(ADC0, ADC_REGULAR_CHANNEL, 6);
/* ADC regular channel config 配置转换通道 */
adc_regular_channel_config(ADC0, 0, ADC_CHANNEL_10, ADC_SAMPLETIME_55POINT5);
adc_regular_channel_config(ADC0, 1, ADC_CHANNEL_11, ADC_SAMPLETIME_55POINT5);
adc_regular_channel_config(ADC0, 2, ADC_CHANNEL_12, ADC_SAMPLETIME_55POINT5);
adc_regular_channel_config(ADC0, 3, ADC_CHANNEL_13, ADC_SAMPLETIME_55POINT5);
adc_regular_channel_config(ADC0, 4, ADC_CHANNEL_14, ADC_SAMPLETIME_55POINT5);
adc_regular_channel_config(ADC0, 5, ADC_CHANNEL_15, ADC_SAMPLETIME_55POINT5);
/* ADC trigger config 软件触发*/
adc_external_trigger_source_config(ADC0, ADC_REGULAR_CHANNEL, ADC0_1_EXTTRIG_REGULAR_T1_CH1);
/* ADC external trigger enable */
adc_external_trigger_config(ADC0, ADC_REGULAR_CHANNEL, ENABLE);
/* ADC discontinuous mode */
adc_discontinuous_mode_config(ADC0, ADC_REGULAR_CHANNEL, 3);
/* enable ADC interface */
adc_enable(ADC0);
delay_1ms(1);
/* ADC calibration and reset calibration */
adc_calibration_enable(ADC0);
delay_1ms(1);
/* ADC DMA function enable */
adc_dma_mode_enable(ADC0);
//DMA配置
/* ADC DMA_channel configuration */
dma_deinit(DMA0, DMA_CH0);
/* initialize DMA single data mode */
dma_data_parameter.periph_addr = (uint32_t)(&ADC_RDATA(ADC0));
dma_data_parameter.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
dma_data_parameter.memory_addr = (uint32_t)(&adc_group_value);
dma_data_parameter.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
//dma_data_parameter.memory_inc = DMA_MEMORY_INCREASE_DISABLE;
dma_data_parameter.periph_width = DMA_PERIPHERAL_WIDTH_16BIT;
dma_data_parameter.memory_width = DMA_MEMORY_WIDTH_16BIT;
dma_data_parameter.direction = DMA_PERIPHERAL_TO_MEMORY;
dma_data_parameter.number = 6;//
dma_data_parameter.priority = DMA_PRIORITY_HIGH;
dma_init(DMA0, DMA_CH0, &dma_data_parameter);
dma_circulation_enable(DMA0, DMA_CH0);
/* enable DMA channel */
dma_channel_enable(DMA0, DMA_CH0);
}