GD32嵌入式开发实战指南：探秘第14章——内置温度传感器的运用详解

/*
brief Configure the ADC peripheral
param[in] none
param[out] none
retval none
*/
void adc_config(void)
{
/* enable GPIOC clock */
rcu_periph_clock_enable(RCU_GPIOC);

/* enable ADC0 clock */
rcu_periph_clock_enable(RCU_ADC0);

/* config ADC clock */
rcu_adc_clock_config(RCU_CKADC_CKAPB2_DIV8);

/* config the GPIO as analog mode */
gpio_init(GPIOC, GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, GPIO_PIN_3);

/* ADC mode config */
adc_mode_config(ADC_MODE_FREE);

/* ADC continuous mode function disable */
adc_special_function_config(ADC0, ADC_CONTINUOUS_MODE, DISABLE);

/* ADC data alignment config */
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 */
adc_regular_channel_config(ADC0, 0, ADC_CHANNEL_16, ADC_SAMPLETIME_1POINT5);

/* ADC trigger config */
adc_external_trigger_source_config(ADC0, ADC_REGULAR_CHANNEL, ADC0_1_2_EXTTRIG_REGULAR_NONE);

/* ADC external trigger enable */
adc_external_trigger_config(ADC0, ADC_REGULAR_CHANNEL, ENABLE);

/* ADC temperature and Vrefint enable */
adc_tempsensor_vrefint_enable();

/* enable ADC interface */
adc_enable(ADC0);
delay_ms(1);

/* ADC calibration and reset calibration */
adc_calibration_enable(ADC0);

}