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在STM32WB09KE内部配有8个A/D数据通道及一个VBAT检测通道和一个内部温度检测通道。 借助例程可实现内部温度检测和通道4的检测。其中通道4所使用的引脚为PB3，可从接口CN6的pin 6来连接，也可口CN4的pin 11来连接。 对这2个检测通道的初始化函数为： static void MX_ADC1_Init(void)
{
ADC_ChannelConfTypeDef ConfigChannel = {0};
hadc1.Instance = ADC1;
hadc1.Init.ConversionType = ADC_CONVERSION_WITH_DS;
hadc1.Init.SequenceLength = 2;
hadc1.Init.SamplingMode = ADC_SAMPLING_AT_START;
hadc1.Init.SampleRate = ADC_SAMPLE_RATE_16;
hadc1.Init.InvertOutputMode = ADC_DATA_INVERT_NONE;
hadc1.Init.Overrun = ADC_NEW_DATA_IS_LOST;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.DownSamplerConfig.DataWidth = ADC_DS_DATA_WIDTH_12_BIT;
hadc1.Init.DownSamplerConfig.DataRatio = ADC_DS_RATIO_1;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
ConfigChannel.Channel = ADC_CHANNEL_TEMPSENSOR;
ConfigChannel.Rank = ADC_RANK_1;
ConfigChannel.VoltRange = ADC_VIN_RANGE_1V2;
ConfigChannel.CalibrationPoint.Number = ADC_CALIB_POINT_1;
ConfigChannel.CalibrationPoint.Gain = 0x0;
ConfigChannel.CalibrationPoint.Offset = 0x0;
if (HAL_ADC_ConfigChannel(&hadc1, &ConfigChannel) != HAL_OK)
{
Error_Handler();
}
ConfigChannel.Channel = ADC_CHANNEL_VINP0;
ConfigChannel.Rank = ADC_RANK_2;
ConfigChannel.CalibrationPoint.Number = ADC_CALIB_NONE;
ConfigChannel.CalibrationPoint.Gain = 0x00;
ConfigChannel.CalibrationPoint.Offset = 0x00;
if (HAL_ADC_ConfigChannel(&hadc1, &ConfigChannel) != HAL_OK)
{
Error_Handler();
}
}
由于该例程没有配置串口，因此对A/D的检测值是无法打印输出的。为此，需要配合相应的显示器件来显示。 前面曾介绍过彩色LCD屏的显示驱动，由于在A/D检测中会与LCD的引脚产生冲突，故改变引脚后的高低电平输出语句定义为： #define OLED_SCLK_Set HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6, GPIO_PIN_SET) // CLK #define OLED_SCLK_Clr HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6, GPIO_PIN_RESET) #define OLED_SDIN_Set HAL_GPIO_WritePin(GPIOB, GPIO_PIN_7, GPIO_PIN_SET) // DIN #define OLED_SDIN_Clr HAL_GPIO_WritePin(GPIOB, GPIO_PIN_7, GPIO_PIN_RESET) #define OLED_RST_Set HAL_GPIO_WritePin(GPIOA, GPIO_PIN_9, GPIO_PIN_SET) // RES #define OLED_RST_Clr HAL_GPIO_WritePin(GPIOA, GPIO_PIN_9, GPIO_PIN_RESET) #define OLED_DC_Set HAL_GPIO_WritePin(GPIOA, GPIO_PIN_8, GPIO_PIN_SET) // DC #define OLED_DC_Clr HAL_GPIO_WritePin(GPIOA, GPIO_PIN_8, GPIO_PIN_RESET) #define OLED_CS_Set HAL_GPIO_WritePin(GPIOA, GPIO_PIN_11, GPIO_PIN_SET) //CS #define OLED_CS_Clr HAL_GPIO_WritePin(GPIOA, GPIO_PIN_11, GPIO_PIN_RESET) 相应的引脚功能配置函数为： static void LCD_GPIO(void)
{
__HAL_RCC_GPIOB_CLK_ENABLE();
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Pin = GPIO_PIN_6;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_7;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_3;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_8;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_11;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_9;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
用于2个通道检测与显示的主程序为： int main(void)
{
uint32_t u,V;
uint32_t tmp_index;
for (tmp_index = 0; tmp_index < ADC_CONVERTED_DATA_BUFFER_SIZE; tmp_index++)
{
uhADCxConvertedData[tmp_index] = VAR_CONVERTED_DATA_INIT_VALUE;
}
HAL_Init();
SystemClock_Config();
PeriphCommonClock_Config();
MX_GPIO_Init();
MX_DMA_Init();
MX_ADC1_Init();
BSP_LED_Init(LD1);
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Pin = LD1_PIN;
HAL_GPIO_Init(LD1_GPIO_PORT, &GPIO_InitStruct);
GPIO_InitStruct.Pin = LD2_PIN;
HAL_GPIO_Init(LD2_GPIO_PORT, &GPIO_InitStruct);
LCD_GPIO();
Lcd_Init();
LCD_Clear(RED);
LCD_ShowString(10,10,"STM32WB09KE",YELLOW);
LCD_ShowString(10,30,"jinglixixi",YELLOW);
HAL_Delay(1000);
LCD_Clear(RED);
LCD_ShowString(10,10,"Tempe: ",YELLOW);
LCD_ShowString(10,30,"ADC: ",YELLOW);
if (HAL_ADC_Start_DMA(&hadc1,
(uint32_t *)uhADCxConvertedData,
ADC_CONVERTED_DATA_BUFFER_SIZE
) != HAL_OK)
{
Error_Handler();
}
BSP_LED_On(LD1);
HAL_Delay(LED_BLINK_SLOW);
BSP_LED_Off(LD1);
HAL_Delay(LED_BLINK_SLOW);
while (1)
{
if (HAL_ADC_Start(&hadc1) != HAL_OK)
{
Error_Handler();
}
BSP_LED_On(LD1);
HAL_Delay(LED_BLINK_SLOW);
BSP_LED_Off(LD1);
HAL_Delay(LED_BLINK_SLOW);
if(ubDmaTransferStatus == 1)
{
uhADCxConvertedData_VoltageGPIO_mVolt = __LL_ADC_CALC_DATA_TO_VOLTAGE(LL_ADC_VIN_RANGE_3V6, uhADCxConvertedData[1], LL_ADC_DS_DATA_WIDTH_12_BIT);
hADCxConvertedData_Temperature_DegreeCelsius = __LL_ADC_CALC_TEMPERATURE( uhADCxConvertedData[0], LL_ADC_DS_DATA_WIDTH_12_BIT);
LCD_ShowNum(66,10,hADCxConvertedData_Temperature_DegreeCelsius,3,YELLOW);
LCD_ShowNum(66,30,uhADCxConvertedData_VoltageGPIO_mVolt,4,YELLOW);
ubDmaTransferStatus = 0;
tmp_index = 4*2;
while(tmp_index != 0)
{
BSP_LED_Toggle(LD1);
HAL_Delay(LED_BLINK_FAST);
tmp_index--;
}
HAL_Delay(500);
}
}
}
经程序的编译与下载，其检测效果如图1和图2所示，说明检测有效。 图1 连接与显示
图2 显示效果 在搭建外部NTC温度检测电路的情况下，需在主程序中添加相应的NTC温度变换处理程序，其具体的内容如下： LCD_ShowString(10,10,"Tempe1: ",YELLOW);
LCD_ShowString(10,30,"Tempe2: ",YELLOW);
u=uhADCxConvertedData_VoltageGPIO_mVolt = __LL_ADC_CALC_DATA_TO_VOLTAGE(LL_ADC_VIN_RANGE_3V6, uhADCxConvertedData[1], LL_ADC_DS_DATA_WIDTH_12_BIT);
u=u*33/36;
...
if((u<=1644) && (u>1268))
V=10+(1644-u)/37;
if((u<=1268) && (u>947))
V=20+(1268-u)/32;
if((u<=947) && (u>692))
V=30+(947-u)/25;
...
LCD_ShowNum(76,30,V,4,YELLOW);
这样，在图3和图4的情况下即可进行室温和升温的测试。 图3 室温检测
图4 触摸升温
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