1.新增wch adc驱动。

bsp/wch/driver/drv_adc.c

@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2023, mr-library Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-05-22     MacRsh       first version
+ */
+
+#include "drv_adc.h"
+
+#undef LOG_TAG
+#define LOG_TAG "drv_adc"
+
+#if (MR_CONF_ADC == MR_CONF_ENABLE)
+
+static struct ch32_adc ch32_adc[] =
+	{
+#ifdef BSP_ADC_1
+		{"adc1",
+		 {ADC1,
+		  RCC_APB2Periph_ADC1}},
+#endif
+#ifdef BSP_ADC_2
+		{"adc2",
+		 {ADC2,
+		  RCC_APB2Periph_ADC2}},
+#endif
+	};
+
+static struct mr_adc hw_adc[mr_array_get_length(ch32_adc)];
+
+mr_err_t ch32_adc_configure(mr_adc_t adc, mr_state_t state)
+{
+	struct ch32_adc *hw = (struct ch32_adc *)adc->device.data;
+	ADC_InitTypeDef ADC_InitStructure = {0};
+
+	RCC_APB2PeriphClockCmd(hw->hw_adc.adc_periph_clock, (FunctionalState)state);
+	RCC_ADCCLKConfig(RCC_PCLK2_Div2);
+
+	ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
+	ADC_InitStructure.ADC_ScanConvMode = DISABLE;
+	ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
+	ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
+	ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
+	ADC_InitStructure.ADC_NbrOfChannel = 1;
+	ADC_Init(hw->hw_adc.Instance, &ADC_InitStructure);
+	ADC_Cmd(hw->hw_adc.Instance, (FunctionalState)state);
+
+	return MR_ERR_OK;
+}
+
+mr_err_t ch32_adc_channel_configure(mr_adc_t adc, mr_uint16_t channel, mr_state_t state)
+{
+	struct ch32_adc *hw = (struct ch32_adc *)adc->device.data;
+	GPIO_InitTypeDef GPIO_InitStructure = {0};
+	GPIO_TypeDef *GPIOx = {0};
+
+	if (channel <= 7)
+	{
+		RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
+		GPIOx = GPIOA;
+	} else if (channel <= 10)
+	{
+		RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
+		GPIOx = GPIOB;
+	} else
+	{
+		RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
+		GPIOx = GPIOC;
+	}
+
+	if (state == MR_ENABLE)
+		GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
+	else
+		GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
+
+	GPIO_InitStructure.GPIO_Pin = (1 << channel);
+	GPIO_Init(GPIOx, &GPIO_InitStructure);
+
+	MR_LOG_D(LOG_TAG,
+			 "Config %s %d %d\r\n",
+			 hw->name,
+			 channel,
+			 state);
+
+	return MR_ERR_OK;
+}
+
+mr_uint32_t ch32_adc_read(mr_adc_t adc, mr_uint16_t channel)
+{
+	struct ch32_adc *hw = (struct ch32_adc *)adc->device.data;
+	mr_uint32_t data = 0;
+
+	ADC_RegularChannelConfig(hw->hw_adc.Instance, channel, 1, ADC_SampleTime_239Cycles5);
+	ADC_SoftwareStartConvCmd(hw->hw_adc.Instance, ENABLE);
+	while (! ADC_GetFlagStatus(hw->hw_adc.Instance, ADC_FLAG_EOC));
+	data = ADC_GetConversionValue(hw->hw_adc.Instance);
+	ADC_ClearFlag(hw->hw_adc.Instance, ADC_FLAG_EOC);
+
+	return data;
+}
+
+mr_err_t mr_hw_adc_init(void)
+{
+	mr_err_t ret = MR_ERR_OK;
+	mr_size_t count = mr_array_get_length(hw_adc);
+	static struct mr_adc_ops ops =
+		{
+			ch32_adc_configure,
+			ch32_adc_channel_configure,
+			ch32_adc_read,
+		};
+
+	while (count --)
+	{
+		ret = mr_hw_adc_add(&hw_adc[count], ch32_adc[count].name, &ops, &ch32_adc[count]);
+		MR_ASSERT(ret == MR_ERR_OK);
+	}
+
+	return MR_ERR_OK;
+}
+INIT_BOARD_EXPORT(mr_hw_adc_init);
+
+#endif

bsp/wch/driver/drv_adc.h

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2023, mr-library Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-05-22     MacRsh       first version
+ */
+
+#ifndef _DRV_ADC_H_
+#define _DRV_ADC_H_
+
+#include "device/adc/adc.h"
+
+#if (MR_CONF_ADC == MR_CONF_ENABLE)
+
+struct ch32_hw_adc
+{
+	ADC_TypeDef *Instance;
+
+	mr_uint32_t adc_periph_clock;
+};
+
+struct ch32_adc
+{
+	char *name;
+
+	struct ch32_hw_adc hw_adc;
+};
+
+mr_err_t mr_hw_adc_init(void);
+
+#endif
+
+#endif