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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-01-03 iysheng first version
*/
#include <board.h>
#include <drivers/drv_comm.h>
#include <drivers/adc.h>
#define DBG_TAG "drv.adc"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#ifdef RT_USING_ADC
#define MAX_EXTERN_ADC_CHANNEL 16
typedef struct {
struct rt_adc_device adc_dev;
char name[8];
rt_base_t adc_pins[16];
void *private_data;
} gd32_adc_device;
static gd32_adc_device g_gd32_devs[] = {
#ifdef BSP_USING_ADC0
{
{},
"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,
},
#endif
#ifdef BSP_USING_ADC1
{
{},
"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,
},
#endif
};
/*
* static void init_pin4adc
*
* 初始化指定的管腳爲 analog 模式
* @ rt_uint32_t pin: pin information
* return: N/A
*/
static void init_pin4adc(rt_base_t pin)
{
GPIO_InitPara GPIO_InitStruct = {0};
GPIO_InitStruct.GPIO_Pin = PIN_GDPIN(pin);
GPIO_InitStruct.GPIO_Speed = GPIO_SPEED_50MHZ;
GPIO_InitStruct.GPIO_Mode = GPIO_MODE_AIN;
GPIO_Init(PIN_GDPORT(pin), &GPIO_InitStruct);
}
static rt_err_t gd32_adc_enabled(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled)
{
ADC_TypeDef *ADCx;
ADC_InitPara ADC_InitParaStruct = {0};
gd32_adc_device * gd32_adc = (gd32_adc_device *)device;
if (channel >= MAX_EXTERN_ADC_CHANNEL)
{
LOG_E("invalid channel");
return -E2BIG;
}
ADCx = (ADC_TypeDef *)(device->parent.user_data);
if (enabled == ENABLE)
{
init_pin4adc(gd32_adc->adc_pins[channel]);
ADC_InitParaStruct.ADC_Trig_External = ADC_EXTERNAL_TRIGGER_MODE_NONE;
/* Fix the channel number to fit the firmware library */
ADC_InitParaStruct.ADC_Channel_Number = 1 + channel;
ADC_InitParaStruct.ADC_Data_Align = ADC_DATAALIGN_RIGHT;
ADC_InitParaStruct.ADC_Mode_Scan = DISABLE;
ADC_InitParaStruct.ADC_Mode = ADC_MODE_INDEPENDENT;
ADC_InitParaStruct.ADC_Mode_Continuous = ENABLE;
ADC_Init(ADCx, &ADC_InitParaStruct);
ADC_RegularChannel_Config(ADCx, channel, 1, ADC_SAMPLETIME_13POINT5);
ADC_Enable(ADCx, ENABLE);
ADC_SoftwareStartConv_Enable(ADCx, ENABLE);
}
else
{
ADC_Enable(ADCx, DISABLE);
}
return 0;
}
static rt_err_t gd32_adc_convert(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value)
{
ADC_TypeDef *ADCx;
if (!value)
{
LOG_E("invalid param");
return -EINVAL;
}
ADCx = (ADC_TypeDef *)(device->parent.user_data);
*value = ADC_GetConversionValue(ADCx);
return 0;
}
static struct rt_adc_ops g_gd32_adc_ops = {
gd32_adc_enabled,
gd32_adc_convert,
};
static int rt_hw_adc_init(void)
{
int ret, i = 0;
#ifdef BSP_USING_ADC0
rcu_periph_clock_enable(RCU_ADC0);
#endif
#ifdef BSP_USING_ADC1
rcu_periph_clock_enable(RCU_ADC1);
#endif
for (; i < ARRAY_SIZE(g_gd32_devs); i++)
{
ret = rt_hw_adc_register(&g_gd32_devs[i].adc_dev, \
(const char *)g_gd32_devs[i].name, \
&g_gd32_adc_ops, g_gd32_devs[i].private_data);
if (ret != RT_EOK)
{
/* TODO err handler */
LOG_E("failed register %s, err=%d", g_gd32_devs[i].name, ret);
}
}
return ret;
}
INIT_BOARD_EXPORT(rt_hw_adc_init);
#endif
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