bsp-gd32:adc驱动bug修复

bsp/gd32/libraries/gd32_drivers/drv_adc.c

@@ -6,91 +6,86 @@
  * Change Logs:
  * Date           Author            Notes
  * 2021-02-25     iysheng           first version
+ * 2022-04-13     wangh             adc init and convert bug fix
  */
 
 #include <board.h>
-#include <drivers/adc.h>
 
-#define DBG_TAG             "drv.adc"
-#define DBG_LVL             DBG_INFO
+#ifdef RT_USING_ADC
 
+#define DBG_TAG "drv.adc"
+#define DBG_LVL DBG_INFO
 #include <rtdbg.h>
 
-#ifdef RT_USING_ADC
-
-#define MAX_EXTERN_ADC_CHANNEL    16
+#define MAX_EXTERN_ADC_CHANNEL  16
 
-typedef struct {
+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[] = {
+static gd32_adc_device adc_devs[] = {
 #ifdef BSP_USING_ADC0
     {
-        {},
-        "adc0",
-        {
+        .name = "adc0",
+        .adc_pins = {
             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),
         },
-        (void *)ADC0,
+        .private_data = (void *)ADC0,
     },
 #endif
 
 #ifdef BSP_USING_ADC1
     {
-        {},
-        "adc1",
-        {
+        .name = "adc1",
+        .adc_pins = {
             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),
         },
-        (void *)ADC1,
+        .private_data = (void *)ADC1,
     },
 #endif
 };
 
-/*
- * static void init_pin4adc
- *
- * @ rt_uint32_t pin: pin information
- * return: N/A
- */
-static void init_pin4adc(rt_base_t pin)
+static void gd32_adc_gpio_init(rt_base_t pin)
 {
+    rcu_periph_clock_enable((rcu_periph_enum)PIN_GDRCU(pin));
     gpio_init(PIN_GDPORT(pin), GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, PIN_GDPIN(pin));
 }
 
-static rt_err_t gd32_adc_enabled(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled)
+static rt_err_t drv_adc_enabled(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled)
 {
-    uint32_t adc_periph;
-    gd32_adc_device * gd32_adc = (gd32_adc_device *)device;
-
-    if (channel >= MAX_EXTERN_ADC_CHANNEL)
+    if ((device == NULL) || (channel >= MAX_EXTERN_ADC_CHANNEL))
     {
-        LOG_E("invalid channel");
+        LOG_E("invalid channel\r\n");
         return -RT_EINVAL;
     }
 
-    adc_periph = (uint32_t )(device->parent.user_data);
+    gd32_adc_device *gd32_adc = (gd32_adc_device *)device;
+    uint32_t adc_periph = (uint32_t )(device->parent.user_data);
 
     if (enabled == ENABLE)
     {
-        init_pin4adc(gd32_adc->adc_pins[channel]);
+        gd32_adc_gpio_init(gd32_adc->adc_pins[channel]);
         adc_deinit(adc_periph);
         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_INSERTED_NONE);
-        adc_external_trigger_config(adc_periph, ADC_REGULAR_CHANNEL, ENABLE);
-        adc_regular_channel_config(adc_periph, 0, channel, ADC_SAMPLETIME_13POINT5);
+        adc_data_alignment_config(adc_periph, ADC_DATAALIGN_RIGHT);             /* 数据右对齐 */
+        adc_external_trigger_config(adc_periph, ADC_REGULAR_CHANNEL, ENABLE);   /* 规则组外部触发使能 */
+        adc_external_trigger_source_config(adc_periph, ADC_REGULAR_CHANNEL, ADC0_1_2_EXTTRIG_REGULAR_NONE);
+        adc_special_function_config(adc_periph, ADC_SCAN_MODE, DISABLE);        /* 扫描模式禁止，单通道模式 */
+        adc_special_function_config(adc_periph, ADC_CONTINUOUS_MODE, DISABLE);  /* 连续转换禁止，单次转换模式 */
+        adc_discontinuous_mode_config(adc_periph, ADC_REGULAR_CHANNEL, 1);      /* 规则组间断使能及转换通道数目 */
         adc_enable(adc_periph);
+        rt_hw_us_delay(500);
+        adc_calibration_enable(adc_periph); /* ADC自校准 */
     }
     else
     {
@@ -100,30 +95,32 @@ static rt_err_t gd32_adc_enabled(struct rt_adc_device *device, rt_uint32_t chann
     return 0;
 }
 
-static rt_err_t gd32_adc_convert(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value)
+static rt_err_t drv_adc_convert(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value)
 {
-    uint32_t adc_periph;
-
-    if (!value)
+    if ((device == NULL) || (channel >= MAX_EXTERN_ADC_CHANNEL) || (value == NULL))
     {
-        LOG_E("invalid param");
+        LOG_E("invalid param\r\n");
         return -RT_EINVAL;
     }
 
-    adc_periph = (uint32_t )(device->parent.user_data);
+    uint32_t adc_periph = (uint32_t )(device->parent.user_data);
+
+    adc_regular_channel_config(adc_periph, 0, channel, ADC_SAMPLETIME_239POINT5);
     adc_software_trigger_enable(adc_periph, ADC_REGULAR_CHANNEL);
+
+    while(!adc_flag_get(adc_periph, ADC_FLAG_EOC)); /* 等待ADC转换完成 */
+    adc_flag_clear(adc_periph, ADC_FLAG_EOC);       /* 清除转换完成标志位 */
+    adc_flag_clear(adc_periph, ADC_FLAG_STRC);
     *value = adc_regular_data_read(adc_periph);
 
     return 0;
 }
 
-static struct rt_adc_ops g_gd32_adc_ops = {
-    gd32_adc_enabled,
-    gd32_adc_convert,
+static struct rt_adc_ops drv_adc_ops = {
+    .enabled = drv_adc_enabled,
+    .convert = drv_adc_convert,
 };
 
-
-
 static int rt_hw_adc_init(void)
 {
     int ret, i = 0;
@@ -136,15 +133,18 @@ static int rt_hw_adc_init(void)
     rcu_periph_clock_enable(RCU_ADC1);
 #endif
 
-    for (; i < sizeof(g_gd32_devs) / sizeof(g_gd32_devs[0]); i++)
+    rcu_adc_clock_config(RCU_CKADC_CKAPB2_DIV6);    /* 72/6 = 12MHz  need < 14MHZ */
+    adc_mode_config(ADC_MODE_FREE);
+
+    for (; i < sizeof(adc_devs) / sizeof(gd32_adc_device); i++)
     {
-        ret = rt_hw_adc_register(&g_gd32_devs[i].adc_dev, \
-            (const char *)g_gd32_devs[i].name, \
-            &g_gd32_adc_ops, (void *)g_gd32_devs[i].private_data);
+        ret = rt_hw_adc_register(&adc_devs[i].adc_dev,
+                                 (const char *)adc_devs[i].name,
+                                 &drv_adc_ops, (void *)adc_devs[i].private_data);
         if (ret != RT_EOK)
         {
             /* TODO err handler */
-            LOG_E("failed register %s, err=%d", g_gd32_devs[i].name, ret);
+            LOG_E("failed register %s, err=%d\r\n", adc_devs[i].name, ret);
         }
     }
 

bsp/gd32/libraries/gd32_drivers/drv_gpio.h

@@ -48,11 +48,13 @@ extern "C" {
 
 #define GET_PIN(PORTx,PIN) (rt_base_t)((16 * ( ((rt_base_t)__GD32_PORT(PORTx) - (rt_base_t)GPIO_BASE)/(0x0400UL) )) + PIN)
 
-#define PIN_PORT(pin) ((uint8_t)(((pin) >> 4) & 0xFu))
-#define PIN_NO(pin) ((uint8_t)((pin) & 0xFu))
+#define PIN_NUM(port, no)       (((((port)&0xFu) << 4) | ((no)&0xFu)))
+#define PIN_PORT(pin)           ((uint8_t)(((pin) >> 4) & 0xFu))
+#define PIN_NO(pin)             ((uint8_t)((pin)&0xFu))
 
-#define PIN_GDPORT(pin) (GPIO_BASE + (0x400u * PIN_PORT(pin)))
-#define PIN_GDPIN(pin) ((uint16_t)(1u << PIN_NO(pin)))
+#define PIN_GDPORT(pin) (GPIO_BASE + (0x400u * PIN_PORT(pin))) /* gpio_periph GPIOA~GPIOG */
+#define PIN_GDPIN(pin)  ((uint16_t)(1u << PIN_NO(pin)))        /* GPIO_PIN_0~GPIO_PIN_15 */
+#define PIN_GDRCU(pin)  RCU_REGIDX_BIT(APB2EN_REG_OFFSET, PIN_PORT(pin) + 2)    /* pin gpio外设时钟 */
 
 struct pin_index
 {