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- /*
- * Copyright (c) 2006-2023, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date Author Notes
- * 2023-03-17 letian first version
- */
- #include <HAL_device.h>
- #include <rtdevice.h>
- #include "drv_adc.h"
- #include <hal_gpio.h>
- #include <hal_adc.h>
- #include <hal_rcc.h>
- #include <hal_misc.h>
- #if defined(BSP_USING_ADC)
- #define ADC_CONFIG_GPIORCC RCC_AHBENR_GPIOA
- #define ADC_CONFIG_GPIOX GPIOA
- #define ADC_CONFIG_IOX GPIO_Pin_5 | GPIO_Pin_4
- struct mm32_adc
- {
- struct rt_adc_device mm32_adc_device;
- ADC_TypeDef *adc_x;
- char *name;
- };
- #if defined(BSP_USING_ADC1)
- struct mm32_adc mm32_adc1_config = {
- .adc_x = ADC1,
- .name = "adc1",
- };
- #endif /* BSP_USING_ADC1 */
- #if defined(BSP_USING_ADC2)
- struct mm32_adc mm32_adc2_config = {
- .adc_x = ADC2,
- .name = "adc2",
- };
- #endif /* BSP_USING_ADC2 */
- static void ADCxChannelEnable(ADC_TypeDef* ADCn, ADCCHANNEL_TypeDef channel)
- {
- ADCn->CHSR &= ~(1 << channel);
- ADCn->CHSR |= (1 << channel);
- }
- static rt_err_t mm32_adc_init(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled)
- {
- ADC_InitTypeDef ADC_InitStruct;
- ADC_TypeDef *adc_x;
- RT_ASSERT(device != RT_NULL);
- adc_x = device->parent.user_data;
- #if defined(BSP_USING_ADC1)
- RCC_APB2PeriphClockCmd(RCC_APB2ENR_ADC1, ENABLE); //Enable ADC1 clock
- #endif /* BSP_USING_ADC1 */
- #if defined(BSP_USING_ADC2)
- RCC_APB2PeriphClockCmd(RCC_APB2ENR_ADC2, ENABLE); //Enable ADC2 clock
- #endif /* BSP_USING_ADC2 */
- ADC_StructInit(&ADC_InitStruct);
- ADC_InitStruct.ADC_Resolution = ADC_Resolution_12b;
- ADC_InitStruct.ADC_PRESCARE = ADC_PCLK2_PRESCARE_16; //ADC prescale factor
- ADC_InitStruct.ADC_Mode = ADC_Mode_Continue; //Set ADC mode to continuous conversion mode
- ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right; //AD data right-justified
- ADC_InitStruct.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
- ADC_Init(adc_x, &ADC_InitStruct);
- ADC_RegularChannelConfig(adc_x, channel, 0, ADC_Samctl_239_5);
- ADC_Cmd(adc_x, ENABLE);
- ADCxChannelEnable(adc_x, channel);
- //config gpio
- GPIO_InitTypeDef GPIO_InitStruct;
- GPIO_StructInit(&GPIO_InitStruct);
- RCC_AHBPeriphClockCmd(ADC_CONFIG_GPIORCC, ENABLE);
- GPIO_InitStruct.GPIO_Pin = ADC_CONFIG_IOX;
- GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AIN;
- GPIO_Init(ADC_CONFIG_GPIOX, &GPIO_InitStruct);
- return RT_EOK;
- }
- static rt_err_t mm32_get_adc_value(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value)
- {
- ADC_TypeDef *adc_x;
- RT_ASSERT(device != RT_NULL);
- adc_x = device->parent.user_data;
- ADC_SoftwareStartConvCmd(adc_x, ENABLE);
- while(ADC_GetFlagStatus(adc_x, ADC_IT_EOC) == 0);
- ADC_ClearFlag(adc_x, ADC_IT_EOC);
- *value = ADC_GetConversionValue(adc_x);
- return RT_EOK;
- }
- static rt_uint8_t mm32_adc_get_resolution(struct rt_adc_device *device)
- {
- ADC_TypeDef *adc_x = device->parent.user_data;
- RT_ASSERT(device != RT_NULL);
- switch( ((adc_x->CFGR)&(0x00000380)) )
- {
- case ADC_Resolution_12b:
- return 12;
- case ADC_Resolution_11b:
- return 11;
- case ADC_Resolution_10b:
- return 10;
- case ADC_Resolution_9b:
- return 9;
- case ADC_Resolution_8b:
- return 8;
- default:
- return 0;
- }
- }
- static rt_int16_t mm32_adc_get_vref(struct rt_adc_device *device)
- {
- if(device == RT_NULL)
- return -RT_ERROR;
- return 3300;
- }
- static const struct rt_adc_ops mm32_adc_ops =
- {
- .enabled = mm32_adc_init,
- .convert = mm32_get_adc_value,
- .get_resolution = mm32_adc_get_resolution,
- .get_vref = mm32_adc_get_vref,
- };
- int rt_hw_adc_init(void)
- {
- #if defined(BSP_USING_ADC1)
- rt_hw_adc_register(&mm32_adc1_config.mm32_adc_device, mm32_adc1_config.name, &mm32_adc_ops, mm32_adc1_config.adc_x);
- #endif /* BSP_USING_ADC1 */
- #if defined(BSP_USING_ADC2)
- rt_hw_adc_register(&mm32_adc2_config.mm32_adc_device, mm32_adc2_config.name, &mm32_adc_ops, mm32_adc2_config.adc_x);
- #endif /* BSP_USING_ADC2 */
- return RT_EOK;
- }
- INIT_BOARD_EXPORT(rt_hw_adc_init);
- #endif /* BSP_USING_ADC */
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