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--- icore4tx_56 [2020/07/29 17:09]
fmj [三、实验原理]
+++ icore4tx_56 [2020/07/29 17:21]
fmj [附录：]
@@ 行 306: / 行 306: @@
 {{ :icore4tx:icore4tx_arm_hal_56_32.png?direct&800 |}}
 {{ :icore4tx:icore4tx_arm_hal_56_33.png?direct&800 |}}
-==== 实验程序 ====
+==== 四、实验程序 ====
 === 1.主函数 ===
@@ 行 315: / 行 315: @@
     int i;
     unsigned short int temp[10] = {0};
-  HAL_Init();
+    HAL_Init();
-  SystemClock_Config();
+    SystemClock_Config();
     i2c.initialize();
     axp152.initialize();
@@ 行 331: / 行 331: @@
-  MX_GPIO_Init();
+    MX_GPIO_Init();
-  MX_USART1_UART_Init();
+    MX_USART1_UART_Init();
-  MX_ADC1_Init();
+    MX_ADC1_Init();
-  MX_ADC3_Init();
+    MX_ADC3_Init();
     usart1.initialize(115200);
@@ 行 522: / 行 522: @@
 </code>
 === 3.74HC4051通道配置 ===
+<code c>
+//定义74HC4051片选管脚
+#define SEL_A_ON  HAL_GPIO_WritePin(GPIOI, SEL_A_Pin, GPIO_PIN_SET)
+#define SEL_A_OFF HAL_GPIO_WritePin(GPIOI, SEL_A_Pin, GPIO_PIN_RESET)
+#define SEL_B_ON  HAL_GPIO_WritePin(GPIOI, SEL_B_Pin, GPIO_PIN_SET)
+#define SEL_B_OFF HAL_GPIO_WritePin(GPIOI, SEL_B_Pin, GPIO_PIN_RESET)
+#define SEL_C_ON  HAL_GPIO_WritePin(GPIOI, SEL_C_Pin, GPIO_PIN_SET)
+#define SEL_C_OFF HAL_GPIO_WritePin(GPIOI, SEL_C_Pin, GPIO_PIN_RESET)
+//选择测量BK4时片选脚状态
+#define CHANNEL_0_ON SEL_C_OFF;\
+                     SEL_B_OFF;\
+                     SEL_A_OFF
+//选择测量BK3时片选脚状态
+#define CHANNEL_1_ON SEL_C_OFF;\
+                     SEL_B_OFF;\
+                     SEL_A_ON
+//选择测量BK5时片选脚状态
+#define CHANNEL_2_ON SEL_C_OFF;\
+                     SEL_B_ON;\
+                     SEL_A_OFF
+//选择测量2.5V时片选脚状态
+#define CHANNEL_3_ON SEL_C_OFF;\
+                     SEL_B_ON;\
+                     SEL_A_ON
+//选择测量输入电流时片选脚状态
+#define CHANNEL_4_ON SEL_C_ON;\
+                     SEL_B_OFF;\
+                     SEL_A_OFF
+//选择测量1.2V时片选脚状态
+#define CHANNEL_5_ON SEL_C_ON;\
+                     SEL_B_OFF;\
+                     SEL_A_ON
+//选择测量3.3V时片选脚状态
+#define CHANNEL_6_ON SEL_C_ON;\
+                     SEL_B_ON;\
+                     SEL_A_OFF
+//选择测量BK7时片选脚状态
+#define CHANNEL_7_ON SEL_C_ON;\
+                     SEL_B_ON;\
+                     SEL_A_ON
+</code>
 === 4.ADC初始化函数 ===
+<code c>
+void MX_ADC1_Init(void)
+{
+  ADC_MultiModeTypeDef multimode = {0};
+  ADC_ChannelConfTypeDef sConfig = {0};
+  hadc1.Instance = ADC1;
+  hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV16;  //16分频
+  hadc1.Init.Resolution = ADC_RESOLUTION_16B;  //ADC转换分辨率16位
+  hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;  //非扫描模式
+  hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;  //关闭 EOC 中断
+  hadc1.Init.LowPowerAutoWait = DISABLE;  //自动低功耗关闭
+  hadc1.Init.ContinuousConvMode = DISABLE;  //关闭连续转换
+  hadc1.Init.NbrOfConversion = 1;	//1个转换在规则序列中
+  hadc1.Init.DiscontinuousConvMode = DISABLE;  //禁止不连续采样模式
+  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;  //软件触发
+  hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;  //禁止触发检测
+  hadc1.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DR; //存到DR寄存器
+  hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;  //溢出保留上次转换数据
+  hadc1.Init.LeftBitShift = ADC_LEFTBITSHIFT_NONE;  //位数不左移
+  hadc1.Init.OversamplingMode = DISABLE;  //关闭过采样
+  if (HAL_ADC_Init(&hadc1) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  multimode.Mode = ADC_MODE_INDEPENDENT; //独立模式
+  if (HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  sConfig.Channel = ADC_CHANNEL_16;  //通道16
+  sConfig.Rank = ADC_REGULAR_RANK_1;  //第 1 个序列
+  sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5;  //采样时间
+  sConfig.SingleDiff = ADC_SINGLE_ENDED;  //单端输入
+  sConfig.OffsetNumber = ADC_OFFSET_NONE;  //不选择偏移序号
+  sConfig.Offset = 0;
+  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
+  {
+    Error_Handler();
+  }
+void MX_ADC3_Init(void)
+{
+  ADC_ChannelConfTypeDef sConfig = {0};
+  hadc3.Instance = ADC3;
+  hadc3.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV16;
+  hadc3.Init.Resolution = ADC_RESOLUTION_16B;
+  hadc3.Init.ScanConvMode = ADC_SCAN_DISABLE;
+  hadc3.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
+  hadc3.Init.LowPowerAutoWait = DISABLE;
+  hadc3.Init.ContinuousConvMode = DISABLE;
+  hadc3.Init.NbrOfConversion = 1;
+  hadc3.Init.DiscontinuousConvMode = DISABLE;
+  hadc3.Init.ExternalTrigConv = ADC_SOFTWARE_START;
+  hadc3.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
+  hadc3.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DR;
+  hadc3.Init.Overrun = ADC_OVR_DATA_PRESERVED;
+  hadc3.Init.LeftBitShift = ADC_LEFTBITSHIFT_NONE;
+  hadc3.Init.OversamplingMode = DISABLE;
+  if (HAL_ADC_Init(&hadc3) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  sConfig.Channel = ADC_CHANNEL_1;
+  sConfig.Rank = ADC_REGULAR_RANK_1;
+  sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5;
+  sConfig.SingleDiff = ADC_SINGLE_ENDED;
+  sConfig.OffsetNumber = ADC_OFFSET_NONE;
+  sConfig.Offset = 0;
+  if (HAL_ADC_ConfigChannel(&hadc3, &sConfig) != HAL_OK)
+  {
+    Error_Handler();
+  }
+}
+</code>
 === 5.ADC读取函数 ===
+<code c>
+void sort(unsigned short int a[], int n)
+{
+    int i, j, t;
+    //元素从小到大排列
+    for (i = 0; i < n - 1; i++) {
+        for (j = 0; j < n - i - 1; j++) {
+            if (a[j] > a[j + 1]) {
+                t = a[j];
+                a[j] = a[j + 1];
+                a[j + 1] = t;
+            }
+        }
+    }
+}
+int read(int channel)
+{
+    int i;
+    unsigned long int temp = 0;
+    unsigned short int data[50];
+    ADC_ChannelConfTypeDef channel_config;
+    int channel_remap[2] = {ADC_CHANNEL_16,ADC_CHANNEL_1};//ADC1,16通道
+    channel_config.Channel = channel_remap[channel]; //通道选择
+    channel_config.Offset = 0; //偏移量为0
+    channel_config.Rank = ADC_REGULAR_RANK_1; //第一个序列
+    channel_config.SamplingTime = ADC_SAMPLETIME_1CYCLE_5; //采样时间
+channel_config.SingleDiff = ADC_SINGLE_ENDED; //单端输入
+     channel_config.OffsetNumber = ADC_OFFSET_NONE;  //不选择偏移序号
+    for(i = 0;i < 50;i ++){
+        if(channel == 0){ //如果通道为0，则使能ADC1
+            HAL_ADC_ConfigChannel(&hadc1,&channel_config);
+            HAL_ADC_Start(&hadc1);
+            while(!__HAL_ADC_GET_FLAG(&hadc1,ADC_FLAG_EOC));
+            data[i] = HAL_ADC_GetValue(&hadc1);
+        }else if(channel == 1){ //如果通道为1，则使能ADC3
+            HAL_ADC_ConfigChannel(&hadc3,&channel_config);
+            HAL_ADC_Start(&hadc3);
+            while(!__HAL_ADC_GET_FLAG(&hadc3,ADC_FLAG_EOC));
+            data[i] = HAL_ADC_GetValue(&hadc3);
+        }
+    }
+    sort(data,50);
+    for(i = 20;i < 30;i++){ //取ADC排序后的中间10位数值
+        temp += data[i];
+    }
+    temp = temp / 10; //取ADC平均值
+    if(channel == 0){ //读取ADC1的值
+        my_adc.value[channel] = temp * ADC_REF / 65536;
+    }
+    return temp;
+}
+static int read_mux(void)
+{	//打开通道并读取ADC的值
+    CHANNEL_0_ON;
+    my_adc.value[1] = my_adc.read(1) * ADC_REF / 65536;
+    CHANNEL_1_ON;
+    my_adc.value[2] = my_adc.read(1) * ADC_REF / 65536;
+    CHANNEL_2_ON;
+    my_adc.value[3] = my_adc.read(1) * ADC_REF / 65536;
+    CHANNEL_3_ON;
+    my_adc.value[4] = my_adc.read(1) * ADC_REF / 65536;
+    CHANNEL_4_ON;
+    my_adc.value[5] = my_adc.read(1) * ADC_REF / 65536;
+    CHANNEL_5_ON;
+    my_adc.value[6] = my_adc.read(1) * ADC_REF / 65536;
+    CHANNEL_6_ON;
+    my_adc.value[7] = my_adc.read(1) * ADC_REF / 65536;
+    CHANNEL_7_ON;
+    my_adc.value[8] = my_adc.read(1) * ADC_REF / 65536;
+    return 0;
+}
+</code>
@@ 行 542: / 行 750: @@
 ==== 六.实验现象 ====
   * 通过Modbus Poll软件获得iCore4TX的电源电压和温度信息。
+{{ :icore4tx:icore4tx_arm_hal_56_34.png?direct&10000 |}}
@@ 行 567: / 行 775: @@
 、打开 Modbus Poll，点击 Connection connect，输入 SN.txt 中的序列号。
+{{ :icore4tx:icore4tx_arm_hal_56_35.png?direct&800 |}}
 、按下图进行设置，点击 OK 即可。
+{{ :icore4tx:icore4tx_arm_hal_56_36.png?direct&600 |}}

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