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/*
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2024-05-17 QT-one first version
*/
#include <rtdbg.h>
#include "drv_adc.h"
#ifdef RT_USING_ADC
#if !defined(BSP_USING_ADC0) && !defined(BSP_USING_ADC1)
#error "Please define at least one BSP_USING_ADCx"
/* this driver can be disabled at menuconfig RT-Thread Components Device Drivers */
#endif
struct ht32_adc
{
struct rt_adc_device ht32_adc_device;
HT_ADC_TypeDef *adc_x;
char *name;
};
/* ADC Peripheral List */
static struct ht32_adc ht32_adc_obj[] =
{
#ifdef BSP_USING_ADC0
{
.adc_x = HT_ADC0,
.name = BSP_USING_ADC0_NAME,
},
#endif
#ifdef BSP_USING_ADC1
{
.adc_x = HT_ADC1,
.name = BSP_USING_ADC1_NAME,
},
#endif
};
static rt_err_t ht32_adc_enabled(struct rt_adc_device *device, rt_int8_t channel, rt_bool_t enabled)
{
HT_ADC_TypeDef *adc_x;
RT_ASSERT(device != RT_NULL);
adc_x = (HT_ADC_TypeDef*)device->parent.user_data;
if(enabled)
{
ht32_adc_gpio_init(adc_x,channel);
/* Configure the CK_ADCn prescaler */
#ifdef BSP_USING_ADC0
if(HT_ADC0 == adc_x)
{
CKCU_SetADCnPrescaler(CKCU_ADCPRE_ADC0,CKCU_ADCPRE_DIV64);
}
#endif
#ifdef BSP_USING_ADC1
if(HT_ADC1 == adc_x)
{
CKCU_SetADCnPrescaler(CKCU_ADCPRE_ADC1,CKCU_ADCPRE_DIV64);
}
#endif
/* Configure conversion mode and sequence length (number of conversion channels) */
ADC_RegularGroupConfig(adc_x,ONE_SHOT_MODE,1,0);
#ifdef SOC_SERIES_HT32F5
/* Configuring the Sampling Time */
ADC_SamplingTimeConfig(adc_x,0);
/* Configuring Channel Priority */
ADC_RegularChannelConfig(adc_x,channel,0);
#endif
#ifdef SOC_SERIES_HT32F1
/* Configuring Channel Priority */
ADC_RegularChannelConfig(adc_x,channel,0,0);
#endif
/* Configuring the Trigger Source */
ADC_RegularTrigConfig(adc_x,ADC_TRIG_SOFTWARE);
/* Enable ADC */
ADC_Cmd(adc_x,ENABLE);
}
else
{
/* Disable ADC */
ADC_Cmd(adc_x,DISABLE);
}
return RT_EOK;
}
static rt_err_t ht32_adc_convert(struct rt_adc_device *device, rt_int8_t channel, rt_uint32_t *value)
{
HT_ADC_TypeDef *adc_x;
rt_uint32_t timeout = 0;
FlagStatus adc_writ_flag = RESET;
RT_ASSERT(device != RT_NULL);
adc_x = (HT_ADC_TypeDef*)device->parent.user_data;
/* Toggle the acquisition channel */
#ifdef SOC_SERIES_HT32F5
ADC_RegularChannelConfig(adc_x,channel,0);
#endif
#ifdef SOC_SERIES_HT32F1
ADC_RegularChannelConfig(adc_x,channel,0,0);
#endif
/* enable Software triggered */
ADC_SoftwareStartConvCmd(adc_x,ENABLE);
while((!adc_writ_flag) && (timeout < 0xFFFF))
{
/* Wait for the conversion to complete */
adc_writ_flag = ADC_GetFlagStatus(adc_x,ADC_FLAG_SINGLE_EOC);
timeout++;
}
if(timeout >= 0xFFFF)
{
LOG_D("channel%d converts timeout, please confirm adc_x enabled or not", channel);
/* disable Software triggered */
ADC_SoftwareStartConvCmd(adc_x,DISABLE);
return -RT_ERROR;
}
/* clear ADC_FLAG_SINGLE_EOC flag */
ADC_ClearIntPendingBit(adc_x,ADC_FLAG_SINGLE_EOC);
/* get adc value */
*value = ADC_GetConversionData(adc_x,ADC_REGULAR_DATA0);
/* disable Software triggered */
ADC_SoftwareStartConvCmd(adc_x,DISABLE);
return RT_EOK;
}
static rt_uint8_t ht32_adc_get_resolution(struct rt_adc_device *device)
{
return 0;
}
static rt_int16_t ht32_adc_get_vref(struct rt_adc_device *device)
{
return 0;
}
/* ADC Device Operation Function Interface */
static const struct rt_adc_ops ht32_adc_ops =
{
.enabled = ht32_adc_enabled,
.convert = ht32_adc_convert,
.get_resolution = ht32_adc_get_resolution,
.get_vref = ht32_adc_get_vref,
};
static int rt_hw_adc_init(void)
{
int result = RT_EOK;
int i = 0;
for (i = 0; i < sizeof(ht32_adc_obj) / sizeof(ht32_adc_obj[0]); i++)
{
/* register ADC device */
if (rt_hw_adc_register(&ht32_adc_obj[i].ht32_adc_device, ht32_adc_obj[i].name, &ht32_adc_ops, ht32_adc_obj[i].adc_x) == RT_EOK)
{
LOG_D("%s register success", ht32_adc_obj[i].name);
}
else
{
LOG_E("%s register failed", ht32_adc_obj[i].name);
result = -RT_ERROR;
}
}
return result;
}
INIT_BOARD_EXPORT(rt_hw_adc_init);
#endif /* RT_USING_ADC */
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