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/*
* Copyright (c) 2006-2026, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-05-03 BruceOu optimization adc
* 2026-03-04 WangShun support gd32vw553
*/
#include "drv_adc.h"
#define DBG_TAG "drv.adc"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#ifdef RT_USING_ADC
#if defined(BSP_USING_ADC)
struct rt_adc_device adc;
#endif
#if defined(BSP_USING_ADC0)
struct rt_adc_device adc0;
#endif
#if defined(BSP_USING_ADC1)
struct rt_adc_device adc1;
#endif
#if defined(BSP_USING_ADC2)
struct rt_adc_device adc2;
#endif
#define MAX_EXTERN_ADC_CHANNEL 16
static const struct gd32_adc adc_obj[] = {
#ifdef BSP_USING_ADC
{
ADC,
RCU_ADC,
{
GET_PIN(A, 0), GET_PIN(A, 1), GET_PIN(A, 2), GET_PIN(A, 3),
GET_PIN(A, 4), GET_PIN(A, 5), GET_PIN(A, 6), GET_PIN(A, 7),
GET_PIN(B, 0), RT_NULL, RT_NULL, RT_NULL,
RT_NULL, RT_NULL, RT_NULL, RT_NULL,
},
&adc,
"adc",
},
#endif
#ifdef BSP_USING_ADC0
{
ADC0,
RCU_ADC0,
{
GET_PIN(A, 0), GET_PIN(A, 1), GET_PIN(A, 2), GET_PIN(A, 3),
GET_PIN(A, 4), GET_PIN(A, 5), GET_PIN(A, 6), GET_PIN(A, 7),
GET_PIN(B, 0), GET_PIN(B, 1), GET_PIN(C, 0), GET_PIN(C, 1),
GET_PIN(C, 2), GET_PIN(C, 3), GET_PIN(C, 4), GET_PIN(C, 5),
},
&adc0,
"adc0",
},
#endif
#ifdef BSP_USING_ADC1
{
ADC1,
RCU_ADC1,
{
GET_PIN(A, 0), GET_PIN(A, 1), GET_PIN(A, 2), GET_PIN(A, 3),
GET_PIN(A, 4), GET_PIN(A, 5), GET_PIN(A, 6), GET_PIN(A, 7),
GET_PIN(B, 0), GET_PIN(B, 1), GET_PIN(C, 0), GET_PIN(C, 1),
GET_PIN(C, 2), GET_PIN(C, 3), GET_PIN(C, 4), GET_PIN(C, 5),
},
&adc1,
"adc1",
},
#endif
#ifdef BSP_USING_ADC2
{
ADC2,
RCU_ADC2,
{
GET_PIN(A, 0), GET_PIN(A, 1), GET_PIN(A, 2), GET_PIN(A, 3),
GET_PIN(A, 4), GET_PIN(A, 5), GET_PIN(A, 6), GET_PIN(A, 7),
GET_PIN(B, 0), GET_PIN(B, 1), GET_PIN(C, 0), GET_PIN(C, 1),
GET_PIN(C, 2), GET_PIN(C, 3), GET_PIN(C, 4), GET_PIN(C, 5),
},
&adc2,
"adc2",
},
#endif
};
/**
* @brief ADC MSP Initialization
* This function configures the hardware resources.
* @param adc_clk, pin
* @retval None
*/
static void gd32_adc_gpio_init(rcu_periph_enum adc_clk, rt_base_t pin)
{
/* enable ADC clock */
rcu_periph_clock_enable(adc_clk);
/* configure adc pin */
#if defined(SOC_SERIES_GD32VW55x)
gpio_mode_set(PIN_GDPORT(pin), GPIO_MODE_ANALOG, GPIO_PUPD_NONE, PIN_GDPIN(pin));
#else
gpio_init(PIN_GDPORT(pin), GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, PIN_GDPIN(pin));
#endif /* SOC_SERIES_GD32VW55x */
}
/**
* @brief ADC enable
* This function enable adc.
* @param device, channel, enabled
* @retval None
*/
static rt_err_t gd32_adc_enabled(struct rt_adc_device *device, rt_int8_t channel, rt_bool_t enabled)
{
uint32_t adc_periph;
struct gd32_adc * adc = (struct gd32_adc *)device->parent.user_data;
if (channel >= MAX_EXTERN_ADC_CHANNEL)
{
LOG_E("invalid channel");
return -RT_EINVAL;
}
adc_periph = (uint32_t )(adc->adc_periph);
if (enabled == ENABLE)
{
gd32_adc_gpio_init(adc->adc_clk, adc->adc_pins[channel]);
#if defined(SOC_SERIES_GD32VW55x)
adc_channel_length_config(ADC_ROUTINE_CHANNEL, 1);
adc_routine_channel_config(0, channel, ADC_SAMPLETIME_55POINT5);
adc_external_trigger_config(ADC_ROUTINE_CHANNEL, EXTERNAL_TRIGGER_RISING);
adc_external_trigger_source_config(ADC_ROUTINE_CHANNEL, ADC_EXTTRIG_ROUTINE_T0_CH0);
adc_data_alignment_config(ADC_DATAALIGN_RIGHT);
adc_enable();
#else
adc_channel_length_config(adc_periph, ADC_REGULAR_CHANNEL, 1);
adc_data_alignment_config(adc_periph, ADC_DATAALIGN_RIGHT);
adc_external_trigger_source_config(adc_periph, ADC_REGULAR_CHANNEL, ADC0_1_2_EXTTRIG_REGULAR_NONE);
adc_external_trigger_config(adc_periph, ADC_REGULAR_CHANNEL, ENABLE);
adc_regular_channel_config(adc_periph, 0, channel, ADC_SAMPLETIME_13POINT5);
adc_enable(adc_periph);
/* ADC calibration and reset calibration */
adc_calibration_enable(adc_periph);
#endif /* SOC_SERIES_GD32VW55x */
}
else
{
#if defined(SOC_SERIES_GD32VW55x)
adc_disable();
#else
adc_disable(adc_periph);
#endif /* SOC_SERIES_GD32VW55x */
}
return 0;
}
/**
* @brief convert adc.
* This function get adc value.
* @param device, channel, value
* @retval None
*/
static rt_err_t gd32_adc_convert(struct rt_adc_device *device, rt_int8_t channel, rt_uint32_t *value)
{
uint32_t adc_periph;
struct gd32_adc * adc = (struct gd32_adc *)(device->parent.user_data);
if (!value)
{
LOG_E("invalid param");
return -RT_EINVAL;
}
#if defined(SOC_SERIES_GD32VW55x)
adc_software_trigger_enable(ADC_ROUTINE_CHANNEL);
while(!adc_flag_get(ADC_FLAG_EOC)){};
adc_flag_clear(ADC_FLAG_EOC);
*value = adc_routine_data_read();
#else
adc_periph = (uint32_t )(adc->adc_periph);
adc_software_trigger_enable(adc_periph, ADC_REGULAR_CHANNEL);
while(!adc_flag_get(adc_periph, ADC_FLAG_EOC)){};
/* clear flag */
adc_flag_clear(adc_periph, ADC_FLAG_EOC);
*value = adc_regular_data_read(adc_periph);
#endif /* SOC_SERIES_GD32VW55x */
return 0;
}
static struct rt_adc_ops gd32_adc_ops = {
.enabled = gd32_adc_enabled,
.convert = gd32_adc_convert,
};
static int rt_hw_adc_init(void)
{
int ret, i = 0;
for (; i < sizeof(adc_obj) / sizeof(adc_obj[0]); i++)
{
ret = rt_hw_adc_register(adc_obj[i].adc, \
(const char *)adc_obj[i].device_name, \
&gd32_adc_ops, &adc_obj[i]);
if (ret != RT_EOK)
{
/* TODO err handler */
LOG_E("failed register %s, err=%d", adc_obj[i].device_name, ret);
}
}
return ret;
}
INIT_BOARD_EXPORT(rt_hw_adc_init);
#endif
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