167 lines
4.0 KiB
C
167 lines
4.0 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-01-03 iysheng first version
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*/
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#include <board.h>
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#include <drivers/drv_comm.h>
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#include <drivers/adc.h>
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#define DBG_TAG "drv.adc"
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#define DBG_LVL DBG_INFO
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#include <rtdbg.h>
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#ifdef RT_USING_ADC
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#define MAX_EXTERN_ADC_CHANNEL 16
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typedef struct {
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struct rt_adc_device adc_dev;
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char name[8];
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rt_base_t adc_pins[16];
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void *private_data;
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} gd32_adc_device;
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static gd32_adc_device g_gd32_devs[] = {
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#ifdef BSP_USING_ADC0
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{
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{},
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"adc0",
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{
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GET_PIN(A, 0), GET_PIN(A, 1), GET_PIN(A, 2), GET_PIN(A, 3),
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GET_PIN(A, 4), GET_PIN(A, 5), GET_PIN(A, 6), GET_PIN(A, 7),
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GET_PIN(B, 0), GET_PIN(B, 1), GET_PIN(C, 0), GET_PIN(C, 1),
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GET_PIN(C, 2), GET_PIN(C, 3), GET_PIN(C, 4), GET_PIN(C, 5),
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},
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ADC0,
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},
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#endif
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#ifdef BSP_USING_ADC1
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{
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{},
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"adc1",
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{
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GET_PIN(A, 0), GET_PIN(A, 1), GET_PIN(A, 2), GET_PIN(A, 3),
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GET_PIN(A, 4), GET_PIN(A, 5), GET_PIN(A, 6), GET_PIN(A, 7),
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GET_PIN(B, 0), GET_PIN(B, 1), GET_PIN(C, 0), GET_PIN(C, 1),
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GET_PIN(C, 2), GET_PIN(C, 3), GET_PIN(C, 4), GET_PIN(C, 5),
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},
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ADC1,
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},
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#endif
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};
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/*
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* static void init_pin4adc
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*
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* 初始化指定的管腳爲 analog 模式
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* @ rt_uint32_t pin: pin information
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* return: N/A
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*/
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static void init_pin4adc(rt_base_t pin)
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{
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GPIO_InitPara GPIO_InitStruct = {0};
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GPIO_InitStruct.GPIO_Pin = PIN_GDPIN(pin);
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GPIO_InitStruct.GPIO_Speed = GPIO_SPEED_50MHZ;
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GPIO_InitStruct.GPIO_Mode = GPIO_MODE_AIN;
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GPIO_Init(PIN_GDPORT(pin), &GPIO_InitStruct);
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}
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static rt_err_t gd32_adc_enabled(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled)
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{
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ADC_TypeDef *ADCx;
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ADC_InitPara ADC_InitParaStruct = {0};
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gd32_adc_device * gd32_adc = (gd32_adc_device *)device;
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if (channel >= MAX_EXTERN_ADC_CHANNEL)
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{
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LOG_E("invalid channel");
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return -E2BIG;
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}
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ADCx = (ADC_TypeDef *)(device->parent.user_data);
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if (enabled == ENABLE)
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{
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init_pin4adc(gd32_adc->adc_pins[channel]);
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ADC_InitParaStruct.ADC_Trig_External = ADC_EXTERNAL_TRIGGER_MODE_NONE;
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/* Fix the channel number to fit the firmware library */
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ADC_InitParaStruct.ADC_Channel_Number = 1 + channel;
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ADC_InitParaStruct.ADC_Data_Align = ADC_DATAALIGN_RIGHT;
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ADC_InitParaStruct.ADC_Mode_Scan = DISABLE;
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ADC_InitParaStruct.ADC_Mode = ADC_MODE_INDEPENDENT;
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ADC_InitParaStruct.ADC_Mode_Continuous = ENABLE;
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ADC_Init(ADCx, &ADC_InitParaStruct);
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ADC_RegularChannel_Config(ADCx, channel, 1, ADC_SAMPLETIME_13POINT5);
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ADC_Enable(ADCx, ENABLE);
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ADC_SoftwareStartConv_Enable(ADCx, ENABLE);
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}
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else
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{
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ADC_Enable(ADCx, DISABLE);
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}
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return 0;
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}
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static rt_err_t gd32_adc_convert(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value)
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{
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ADC_TypeDef *ADCx;
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if (!value)
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{
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LOG_E("invalid param");
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return -EINVAL;
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}
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ADCx = (ADC_TypeDef *)(device->parent.user_data);
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*value = ADC_GetConversionValue(ADCx);
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return 0;
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}
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static struct rt_adc_ops g_gd32_adc_ops = {
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gd32_adc_enabled,
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gd32_adc_convert,
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};
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static int rt_hw_adc_init(void)
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{
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int ret, i = 0;
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#ifdef BSP_USING_ADC0
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rcu_periph_clock_enable(RCU_ADC0);
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#endif
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#ifdef BSP_USING_ADC1
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rcu_periph_clock_enable(RCU_ADC1);
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#endif
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for (; i < ARRAY_SIZE(g_gd32_devs); i++)
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{
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ret = rt_hw_adc_register(&g_gd32_devs[i].adc_dev, \
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(const char *)g_gd32_devs[i].name, \
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&g_gd32_adc_ops, g_gd32_devs[i].private_data);
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if (ret != RT_EOK)
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{
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/* TODO err handler */
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LOG_E("failed register %s, err=%d", g_gd32_devs[i].name, ret);
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}
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}
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return ret;
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}
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INIT_BOARD_EXPORT(rt_hw_adc_init);
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#endif
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