stm32g0内部温度
时间: 2023-09-11 18:06:20 浏览: 156
STM32G0系列微控制器具有内部温度传感器,可以通过ADC通道读取芯片内部温度值。在使用内部温度传感器时,需要先对ADC进行初始化并配置相关参数,然后读取ADC转换结果,计算出芯片当前的温度值。
以下是一个简单的示例代码:
```c
#include "stm32g0xx_hal.h"
ADC_HandleTypeDef hadc;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_ADC_Init(void);
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_ADC_Init();
uint16_t adc_value;
float temperature;
while (1)
{
HAL_ADC_Start(&hadc);
HAL_ADC_PollForConversion(&hadc, 100);
adc_value = HAL_ADC_GetValue(&hadc);
HAL_ADC_Stop(&hadc);
temperature = (adc_value - 3300.0f) / 32.0f;
// 根据芯片手册中的公式,计算温度值
// do something with temperature value
}
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_HCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
}
static void MX_ADC_Init(void)
{
ADC_ChannelConfTypeDef sConfig = {0};
__HAL_RCC_ADC1_CLK_ENABLE();
hadc.Instance = ADC1;
hadc.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
hadc.Init.Resolution = ADC_RESOLUTION_12B;
hadc.Init.ScanConvMode = ADC_SCAN_DISABLE;
hadc.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc.Init.LowPowerAutoWait = DISABLE;
hadc.Init.ContinuousConvMode = DISABLE;
hadc.Init.NbrOfConversion = 1;
hadc.Init.DiscontinuousConvMode = DISABLE;
hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc.Init.DMAContinuousRequests = DISABLE;
hadc.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
hadc.Init.OversamplingMode = DISABLE;
if (HAL_ADC_Init(&hadc) != HAL_OK)
{
Error_Handler();
}
sConfig.Channel = ADC_CHANNEL_TEMPSENSOR;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.SamplingTime = ADC_SAMPLETIME_640CYCLES_5;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
{
Error_Handler();
}
}
static void MX_GPIO_Init(void)
{
__HAL_RCC_GPIOA_CLK_ENABLE();
}
void Error_Handler(void)
{
while (1)
{
}
}
```
在上述代码中,我们使用了ADC1的单通道模式,读取内部温度传感器的值。ADC的时钟频率为HSI时钟(16MHz),转换分辨率为12位,采样时间为640个时钟周期。读取到的ADC值需要先减去3300,然后除以32,得到芯片的温度值(单位:摄氏度)。需要注意,在读取温度值前,需要先对ADC进行初始化和配置。
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