来,E230的ADC,官方例程,增加了内部温度和参考电压采集,采用DMA方式传输
#include "adc.h"
uint16_t adc_value[3];
static void rcu_config(void);
static void gpio_config(void);
static void dma_config(void);
static void adc_config(void);
void adc_init(void)
{
/* system clocks configuration */
rcu_config();
/* systick configuration */
systick_config();
/* GPIO configuration */
gpio_config();
/* DMA configuration */
dma_config();
/* ADC configuration */
adc_config();
}
/*!
\brief configure the different system clocks
\param[in] none
\param[out] none
\retval none
*/
void rcu_config(void)
{
/* enable GPIOC clock */
rcu_periph_clock_enable(RCU_GPIOA);
/* enable ADC clock */
rcu_periph_clock_enable(RCU_ADC);
/* enable DMA clock */
rcu_periph_clock_enable(RCU_DMA);
/* config ADC clock */
rcu_adc_clock_config(RCU_ADCCK_APB2_DIV6);
}
/*!
\brief configure the GPIO peripheral
\param[in] none
\param[out] none
\retval none
*/
void gpio_config(void)
{
/* config the GPIO as analog mode */
gpio_mode_set(ADC_GPIO_PORT, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, ADC_GPIO_PIN);
}
/*!
\brief configure the DMA peripheral
\param[in] none
\param[out] none
\retval none
*/
void dma_config(void)
{
/* ADC_DMA_channel configuration */
dma_parameter_struct dma_data_parameter;
/* ADC DMA_channel configuration */
dma_deinit(DMA_CH0);
/* initialize DMA single data mode */
dma_data_parameter.periph_addr = (uint32_t)(&ADC_RDATA);
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.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 = 3U;
dma_data_parameter.priority = DMA_PRIORITY_HIGH;
dma_init(DMA_CH0, &dma_data_parameter);
dma_circulation_enable(DMA_CH0);
/* enable DMA channel */
dma_channel_enable(DMA_CH0);
}
/*!
\brief configure the ADC peripheral
\param[in] none
\param[out] none
\retval none
*/
void adc_config(void)
{
/* ADC contineous function enable */
//adc_special_function_config(ADC_CONTINUOUS_MODE, ENABLE);
adc_special_function_config(ADC_SCAN_MODE, ENABLE);
adc_tempsensor_vrefint_enable();
/* ADC trigger config */
adc_external_trigger_source_config(ADC_REGULAR_CHANNEL, ADC_EXTTRIG_REGULAR_NONE);
/* ADC data alignment config */
adc_data_alignment_config(ADC_DATAALIGN_RIGHT);
/* ADC channel length config */
adc_channel_length_config(ADC_REGULAR_CHANNEL, 3U);
/* ADC regular channel config */
adc_regular_channel_config(0U, BOARD_ADC_CHANNEL, ADC_SAMPLETIME_239POINT5);
/*添加ref和temp通道*/
/* ADC temperature sensor channel config */
adc_regular_channel_config(1U, ADC_CHANNEL_16, ADC_SAMPLETIME_239POINT5);
/* ADC internal reference voltage channel config */
adc_regular_channel_config(2U, ADC_CHANNEL_17, ADC_SAMPLETIME_239POINT5);
adc_external_trigger_config(ADC_REGULAR_CHANNEL, ENABLE);
/* enable ADC interface */
adc_enable();
delay_1ms(1U);
/* ADC calibration and reset calibration */
adc_calibration_enable();
/* ADC DMA function enable */
adc_dma_mode_enable();
/* ADC software trigger enable */
adc_software_trigger_enable(ADC_REGULAR_CHANNEL);
}
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