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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-09-09 WCH the first version
* 2022-09-17 hg0720 add some operation function
*/
#include <board.h>
#include <rtthread.h>
#include <rtdevice.h>
#include "drv_dac.h"
#if defined BSP_USING_DAC
//#define DRV_DEBUG
#define LOG_TAG "drv.dac"
#include <drv_log.h>
static DAC_HandleTypeDef dac_config[] =
{
#ifdef BSP_USING_DAC_CHANNEL1
{ \
.Instance = DAC, \
.Init.DAC_Trigger = DAC_Trigger_None, \
.Init.DAC_WaveGeneration = DAC_WaveGeneration_None, \
.Init.DAC_LFSRUnmask_TriangleAmplitude = DAC_TriangleAmplitude_4095, \
.Init.DAC_OutputBuffer = DAC_OutputBuffer_Enable, \
.Channel = DAC_Channel_1,
},
#endif
#ifdef BSP_USING_DAC_CHANNEL2
{
.Instance = DAC, \
.Init.DAC_Trigger = DAC_Trigger_None, \
.Init.DAC_WaveGeneration = DAC_WaveGeneration_None, \
.Init.DAC_LFSRUnmask_TriangleAmplitude = DAC_TriangleAmplitude_4095, \
.Init.DAC_OutputBuffer = DAC_OutputBuffer_Enable, \
.Channel = DAC_Channel_2,
}
#endif
};
struct ch32_dac
{
DAC_HandleTypeDef DAC_Handler;
struct rt_dac_device ch32_dac_device;
};
static struct ch32_dac ch32_dac_obj[sizeof(dac_config) / sizeof(dac_config[0])];
static rt_err_t ch32_dac_enabled(struct rt_dac_device *device, rt_uint32_t channel)
{
DAC_HandleTypeDef *ch32_dac_handler;
RT_ASSERT(device != RT_NULL);
ch32_dac_handler = device->parent.user_data;
DAC_Cmd(ch32_dac_handler->Channel, ENABLE);
return RT_EOK;
}
static rt_err_t ch32_dac_disabled(struct rt_dac_device *device, rt_uint32_t channel)
{
DAC_HandleTypeDef *ch32_dac_handler;
RT_ASSERT(device != RT_NULL);
ch32_dac_handler = device->parent.user_data;
DAC_Cmd(ch32_dac_handler->Channel, DISABLE);
return RT_EOK;
}
static rt_uint8_t ch32_dac_get_resolution(struct rt_dac_device *device)
{
DAC_HandleTypeDef *ch32_dac_handler;
RT_ASSERT(device != RT_NULL);
ch32_dac_handler = device->parent.user_data;
(void)ch32_dac_handler;
/* Only has supported DAC_ALIGN_12B_R, so it will return 12 bits */
return 12;
}
static rt_uint32_t ch32_dac_get_channel(rt_uint32_t channel)
{
rt_uint32_t ch32_channel = 0;
switch (channel)
{
case 1:
ch32_channel = DAC_Channel_1;
break;
case 2:
ch32_channel = DAC_Channel_2;
break;
default:
RT_ASSERT(0);
break;
}
return ch32_channel;
}
static rt_err_t ch32_set_dac_value(struct rt_dac_device *device, rt_uint32_t channel, rt_uint32_t *value)
{
rt_uint32_t dac_channel;
DAC_HandleTypeDef *ch32_dac_handler;
RT_ASSERT(device != RT_NULL);
RT_ASSERT(value != RT_NULL);
ch32_dac_handler = device->parent.user_data;
if ((channel <= 2) && (channel > 0))
{
/* set ch32 dac channel */
dac_channel = ch32_dac_get_channel(channel);
}
else
{
LOG_E("dac channel must be 1 or 2.");
return -RT_ERROR;
}
if (channel==1)
{
DAC_SetChannel1Data(DAC_Align_12b_R, *value);
}
else if (channel==2)
{
DAC_SetChannel2Data(DAC_Align_12b_R, *value);
}
return RT_EOK;
}
static const struct rt_dac_ops ch_dac_ops =
{
.disabled = ch32_dac_disabled,
.enabled = ch32_dac_enabled,
.convert = ch32_set_dac_value,
.get_resolution = ch32_dac_get_resolution,
};
static int ch32_dac_init(void)
{
int result = RT_EOK;
/* save dac name */
char name_buf[6] = {'d', 'a', 'c', 'c','0', 0};
int i = 0;
GPIO_InitTypeDef GPIO_InitStructure={0};
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE );
RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE );
for (i = 0; i < sizeof(dac_config) / sizeof(dac_config[0]); i++)
{
/* dac channel init */
name_buf[4] = '0';
ch32_dac_obj[i].DAC_Handler = dac_config[i];
if (ch32_dac_obj[i].DAC_Handler.Channel==DAC_Channel_1)
{
name_buf[4] = '1';
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
if (ch32_dac_obj[i].DAC_Handler.Channel==DAC_Channel_2)
{
name_buf[4] = '2';
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
/* init dac channelx */
DAC_Init(ch32_dac_obj[i].DAC_Handler.Channel,&ch32_dac_obj[i].DAC_Handler.Init);
/* register dac device */
if (rt_hw_dac_register(&ch32_dac_obj[i].ch32_dac_device, name_buf, &ch_dac_ops, &ch32_dac_obj[i].DAC_Handler) == RT_EOK)
{
LOG_D("%s init success", name_buf);
}
else
{
LOG_E("%s register failed", name_buf);
result = -RT_ERROR;
}
}
return result;
}
INIT_DEVICE_EXPORT(ch32_dac_init);
#endif /* BSP_USING_DAC */
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