mirror of https://github.com/RT-Thread/rt-thread
158 lines
4.9 KiB
C
158 lines
4.9 KiB
C
/*
|
||
* 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
|
||
*/
|
||
|
||
/*
|
||
* 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 (HC32F4A0)
|
||
#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)
|
||
#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(HC32F472) || defined(HC32F448)
|
||
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 (HC32F448)
|
||
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
|