1. 代码
//main.c
#include "gd32f3x0.h"
#include "systick.h"
#include <stdio.h>
#include "main.h"
#include "gd32f350r_eval.h"
#include "adc.h"
#include "bsp_gpio.h"
/*!
\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 timer1 clock */
rcu_periph_clock_enable(RCU_TIMER1);
/* 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(GPIOA, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 | GPIO_PIN_4);
}
/*!
\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;
/* TIMER1 configuration */
timer_initpara.prescaler = 8399U;
timer_initpara.alignedmode = TIMER_COUNTER_EDGE;
timer_initpara.counterdirection = TIMER_COUNTER_UP;
timer_initpara.period = 9999U;
timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
timer_initpara.repetitioncounter = 0U;
timer_init(TIMER1, &timer_initpara);
/* CH0 configuration in PWM mode1 */
timer_ocintpara.ocpolarity = TIMER_OC_POLARITY_HIGH;
timer_ocintpara.outputstate = TIMER_CCX_ENABLE;
timer_channel_output_config(TIMER1, TIMER_CH_0, &timer_ocintpara);
timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_0, 3999U);
timer_channel_output_mode_config(TIMER1, TIMER_CH_0, TIMER_OC_MODE_PWM1);
timer_channel_output_shadow_config(TIMER1, TIMER_CH_0, TIMER_OC_SHADOW_DISABLE);
}
/*!
\brief configure the ADC peripheral
\param[in] none
\param[out] none
\retval none
*/
void adc_config(void)
{
/* ADC scan mode enable */
adc_special_function_config(ADC_SCAN_MODE, ENABLE); //屏蔽后，只转换一个通道
/* ADC trigger config */
adc_external_trigger_source_config(ADC_INSERTED_CHANNEL, ADC_EXTTRIG_INSERTED_NONE);
/* ADC data alignment config */
adc_data_alignment_config(ADC_DATAALIGN_RIGHT);
/* ADC channel length config */
adc_channel_length_config(ADC_INSERTED_CHANNEL, 4U);
/* ADC inserted channel config */
adc_inserted_channel_config(0U, ADC_CHANNEL_1, ADC_SAMPLETIME_55POINT5);
adc_inserted_channel_config(1U, ADC_CHANNEL_2, ADC_SAMPLETIME_55POINT5);
adc_inserted_channel_config(2U, ADC_CHANNEL_3, ADC_SAMPLETIME_55POINT5);
adc_inserted_channel_config(3U, ADC_CHANNEL_4, ADC_SAMPLETIME_55POINT5);
/* ADC external trigger enable */
adc_external_trigger_config(ADC_INSERTED_CHANNEL, ENABLE);
/* enable ADC interface */
adc_enable();
delay_1ms(1U);
/* ADC calibration and reset calibration */
adc_calibration_enable();
}
uint16_t buf[4];
/*!
\brief main function
\param[in] none
\param[out] none
\retval none
*/
int main(void)
{
/* system clocks configuration */
rcu_config();
/* systick configuration */
systick_config();
/* GPIO configuration */
gpio_config();
/* TIMER configuration */
timer_config();
/* ADC configuration */
adc_config();
/* enable TIMER1 */
timer_enable(TIMER1);
while(1) {
adc_software_trigger_enable(ADC_INSERTED_CHANNEL);
while(!adc_flag_get(ADC_FLAG_EOIC));
adc_flag_clear(ADC_FLAG_EOIC);
buf[0] = adc_inserted_data_read(ADC_INSERTED_CHANNEL_0);
buf[1] = adc_inserted_data_read(ADC_INSERTED_CHANNEL_1);
buf[2] = adc_inserted_data_read(ADC_INSERTED_CHANNEL_2);
buf[3] = adc_inserted_data_read(ADC_INSERTED_CHANNEL_3);
delay_1ms(500);
}
}
//gd32f3x0_it.c
#include "gd32f3x0_it.h"
#include "main.h"
#include "systick.h"
void SysTick_Handler(void)
{
delay_decrement();
}
//systick.c
#include "gd32f3x0.h"
#include "systick.h"
volatile static uint32_t delay;
/*!
\brief configure systick
\param[in] none
\param[out] none
\retval none
*/
void systick_config(void)
{
/* setup systick timer for 1000Hz interrupts */
if(SysTick_Config(SystemCoreClock / 1000U)) {
/* capture error */
while(1) {
}
}
/* configure the systick handler priority */
NVIC_SetPriority(SysTick_IRQn, 0x00U);
}
/*!
\brief delay a time in milliseconds
\param[in] count: count in milliseconds
\param[out] none
\retval none
*/
void delay_1ms(uint32_t count)
{
delay = count;
while(0U != delay) {
}
}
/*!
\brief delay decrement
\param[in] none
\param[out] none
\retval none
*/
void delay_decrement(void)
{
if(0U != delay) {
delay--;
}
}
2. 效果
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版权声明：本文为CSDN博主「lljss2020」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/lljss1980/article/details/149809073
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