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/*
* Copyright (c) 2022-2024, Xiaohua Semiconductor Co., Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2024-12-30 CDT first version
* 2026-05-27 CDT Support HC32F4A2
*/
/*
* 程序清单： ADC 设备使用例程
* 例程导出了 adc_vol_sample 命令到控制终端
* 命令调用格式：adc_vol_sample 参数选择：adc1 | adc2 | adc3
* 程序功能：通过 ADC 设备采样电压值并转换为数值。
* 示例代码参考电压为3.3V,转换位数为12位。
*/
#include <rtthread.h>
#include <rtdevice.h>
#include "board_config.h"
#include "drv_adc.h"
#ifdef BSP_USING_ADC
#define REFER_VOLTAGE 3300 /* 参考电压 3.3V,单位mv */
#define CONVERT_BITS (1 << 12) /* 转换位数为12位 */
/* ADC Channel Max */
#if defined(HC32F460)
#define ADC1_CH_MAX (16U)
#define ADC2_CH_MAX (8U)
#elif defined(HC32F472)
#define ADC1_CH_MAX (21U)
#define ADC2_CH_MAX (21U)
#define ADC3_CH_MAX (22U)
#elif defined(HC32F467)
#define ADC1_CH_MAX (16U)
#define ADC2_CH_MAX (16U)
#define ADC3_CH_MAX (16U)
#elif defined(HC32F4A0) || defined(HC32F4A2) || defined(HC32F4A8)
#define ADC1_CH_MAX (16U)
#define ADC2_CH_MAX (16U)
#define ADC3_CH_MAX (20U)
#elif defined(HC32F448)
#define ADC1_CH_MAX (16U)
#define ADC2_CH_MAX (8U)
#define ADC3_CH_MAX (12U)
#elif defined(HC32F334)
#define ADC1_CH_MAX (16U)
#define ADC2_CH_MAX (12U)
#define ADC3_CH_MAX (10U)
#endif
#if defined(BSP_ADC1_USING_DMA) || defined(BSP_ADC2_USING_DMA) || defined(BSP_ADC3_USING_DMA)
static struct adc_dev_priv_params adc_priv;
static struct adc_dev_dma_priv_ops priv_ops;
/* Timer的配置需与文件 “adc_config.h”中的 ADC1_EOCA_DMA_CONFIG 对应 */
/* 这里使用Timer01 B通道作为ADC的触发源 */
rt_err_t adc_dma_trig_config(void)
{
stc_tmr0_init_t stcTmr0Init;
#if defined(HC32F460) || defined(HC32F4A0) || defined(HC32F4A2) || defined(HC32F472) || defined(HC32F448) || defined(HC32F4A8) || defined(HC32F334) || defined(HC32F467)
FCG_Fcg2PeriphClockCmd(FCG2_PERIPH_TMR0_1, ENABLE);
#endif
(void)TMR0_StructInit(&stcTmr0Init);
(void)TMR0_Init(CM_TMR0_1, TMR0_CH_B, &stcTmr0Init);
return 0;
}
rt_err_t adc_dma_trig_start(void)
{
TMR0_SetCountValue(CM_TMR0_1, TMR0_CH_B, 0x0);
TMR0_SetCompareValue(CM_TMR0_1, TMR0_CH_B, 0x7FFF);
TMR0_Start(CM_TMR0_1, TMR0_CH_B);
return 0;
}
rt_err_t adc_dma_trig_stop(void)
{
TMR0_Stop(CM_TMR0_1, TMR0_CH_B);
TMR0_ClearStatus(CM_TMR0_1, TMR0_FLAG_CMP_B);
return 0;
}
#endif
static int adc_vol_sample(int argc, char **argv)
{
rt_adc_device_t adc_dev; /* ADC 设备句柄 */
rt_uint32_t value;
rt_uint32_t vol;
rt_uint8_t adc_channel;
char adc_device[] = "adc1";
rt_uint8_t adc_max_channel = ADC1_CH_MAX;
/* 参数无输入或者输入错误按照默认值处理 */
if (argc == 2)
{
if (0 == rt_strcmp(argv[1], "adc1"))
{
rt_strcpy(adc_device, "adc1");
adc_max_channel = ADC1_CH_MAX;
}
else if (0 == rt_strcmp(argv[1], "adc2"))
{
rt_strcpy(adc_device, "adc2");
adc_max_channel = ADC2_CH_MAX;
}
#if defined(HC32F472) || defined(HC32F4A0) || defined(HC32F4A2) || defined(HC32F448) || defined(HC32F4A8) || defined(HC32F334) || defined(HC32F467)
else if (0 == rt_strcmp(argv[1], "adc3"))
{
rt_strcpy(adc_device, "adc3");
adc_max_channel = ADC3_CH_MAX;
}
#endif
else
{
rt_kprintf("The chip hasn't the adc unit!\r\n");
return -RT_ERROR;
}
}
/* 查找设备 */
adc_dev = (rt_adc_device_t)rt_device_find(adc_device);
if (adc_dev == RT_NULL)
{
rt_kprintf("adc sample run failed! can't find %s device!\r\n", adc_device);
return -RT_ERROR;
}
#if defined(BSP_ADC1_USING_DMA) || defined(BSP_ADC2_USING_DMA) || defined(BSP_ADC3_USING_DMA)
/* DMA配置 */
adc_priv.flag = ADC_USING_EOCA_DMA_FLAG;
priv_ops.dma_trig_config = &adc_dma_trig_config;
priv_ops.dma_trig_start = &adc_dma_trig_start;
priv_ops.dma_trig_stop = &adc_dma_trig_stop;
adc_priv.ops = &priv_ops;
adc_dev->parent.user_data = &adc_priv;
#endif
/* 遍历所有通道 */
for (adc_channel = 0; adc_channel < adc_max_channel; adc_channel++)
{
/* 使能设备 */
rt_adc_enable(adc_dev, adc_channel);
/* 读取采样值 */
value = rt_adc_read(adc_dev, adc_channel);
rt_kprintf("Channel: %d, value is :%d 0x%x\r\n", adc_channel, value, value);
/* 转换为对应电压值 */
vol = value * REFER_VOLTAGE / CONVERT_BITS;
rt_kprintf("Simulate voltage is :%d mv\r\n", vol);
vol = rt_adc_voltage(adc_dev, adc_channel);
rt_kprintf("Read voltage is :%d mv\r\n", vol);
rt_kprintf("*********************\r\n");
}
rt_kprintf("*******The %s all channel have be tested**********\r\n", adc_device);
return RT_EOK;
}
/* 导出到 msh 命令列表中 */
MSH_CMD_EXPORT(adc_vol_sample, adc convert sample : select<adc1 | adc2 | adc3>);
#endif
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