PWR_LDO_SUPPLY
时间: 2024-09-04 22:00:28 浏览: 31
PWR_LDO_SUPPLY通常是指电源管理中的“低压差线性稳压器供电”。这种类型的电路设计用于为电子设备提供稳定的直流电源,特别是一些低电压、高电流需求的应用,如传感器节点、微控制器模块等。它通过简单的线性调整过程将输入电压转换成所需的稳定输出电压,其特点是效率相对较低,但结构简单,成本也较便宜。这种供电方案在便携式或电池供电的设备中很常见,因为它对输入电压的变化容忍度较高。
相关问题
使用stm32G431RBT6 hal库写一个秒表 按键按下开始计时 案件再次按下计时结束
好的,下面是基于STM32CubeIDE和HAL库的秒表程序。这个程序使用了TIM6定时器,通过中断实现计时。按下按键时,启动定时器,再次按下按键时,停止定时器并输出计时结果。需要注意的是,这个程序没有进行按键消抖,如果需要可以自行添加。
```c
#include "main.h"
#include "stm32g4xx_hal.h"
TIM_HandleTypeDef htim6;
uint32_t tick_start = 0, tick_stop = 0, tick_elapsed = 0;
uint8_t is_timing = 0;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_TIM6_Init(void);
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_TIM6_Init();
HAL_TIM_Base_Start_IT(&htim6);
while (1)
{
if (HAL_GPIO_ReadPin(BUTTON_GPIO_Port, BUTTON_Pin) == GPIO_PIN_RESET)
{
if (!is_timing)
{
tick_start = HAL_GetTick();
is_timing = 1;
}
else
{
tick_stop = HAL_GetTick();
tick_elapsed = tick_stop - tick_start;
is_timing = 0;
printf("Elapsed time: %d ms\r\n", tick_elapsed);
}
HAL_Delay(200);
}
}
}
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
if (htim == &htim6 && is_timing)
{
HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
}
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Supply configuration update enable
*/
HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);
/** Configure the main internal regulator output voltage
*/
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
while (!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY))
{
}
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = 1;
RCC_OscInitStruct.PLL.PLLN = 20;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV7;
RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK |
RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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_4) != HAL_OK)
{
Error_Handler();
}
}
static void MX_TIM6_Init(void)
{
TIM_MasterConfigTypeDef sMasterConfig = {0};
htim6.Instance = TIM6;
htim6.Init.Prescaler = 1999;
htim6.Init.CounterMode = TIM_COUNTERMODE_UP;
htim6.Init.Period = 199;
if (HAL_TIM_Base_Init(&htim6) != HAL_OK)
{
Error_Handler();
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim6, &sMasterConfig) != HAL_OK)
{
Error_Handler();
}
}
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOB_CLK_ENABLE();
HAL_GPIO_WritePin(LED_GPIO_Port, LED_Pin, GPIO_PIN_RESET);
GPIO_InitStruct.Pin = BUTTON_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(BUTTON_GPIO_Port, &GPIO_InitStruct);
GPIO_InitStruct.Pin = LED_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(LED_GPIO_Port, &GPIO_InitStruct);
}
void Error_Handler(void)
{
__disable_irq();
while (1)
{
}
}
```
基于STM32F103RCT6的MLX90614体温检测TFT彩屏显示代码
由于您没有提供具体的需求和环境,下面提供一个基于Keil MDK和STM32CubeMX的示例代码,可以实现读取MLX90614的温度数据,并在TFT彩屏上显示。请根据您的实际情况进行修改和调整。
首先,使用STM32CubeMX配置STM32F103RCT6的GPIO和I2C外设,并使能HAL库。具体步骤如下:
1. 打开STM32CubeMX软件,选择“New Project”新建一个工程。
2. 选择STM32F103RCT6作为芯片型号,并选择对应的库和工具链。
3. 在“Pinout & Configuration”选项卡中配置GPIO和I2C外设。例如,将SCL和SDA引脚分别配置为PB6和PB7,并使能I2C1。
4. 在“Project Manager”选项卡中生成代码并打开Keil MDK。
接下来,根据MLX90614的通信协议,编写读取温度数据的代码。示例代码如下:
```c
#include "main.h"
#include "stdio.h"
#include "stdbool.h"
#define MLX90614_ADDR 0x5A
#define MLX90614_TA 0x06
#define MLX90614_TOBJ1 0x07
I2C_HandleTypeDef hi2c1;
UART_HandleTypeDef huart1;
TFT_HandleTypeDef htft;
float readTemp(uint8_t reg);
int main(void)
{
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_I2C1_Init();
MX_TFT_Init();
MX_USART1_UART_Init();
/* Initialize TFT */
TFT_FillScreen(&htft, TFT_BLACK);
TFT_SetFont(&htft, &FreeMonoBold9pt7b, TFT_WHITE);
/* Display temperature readings */
while (true)
{
float ta = readTemp(MLX90614_TA);
float tobj1 = readTemp(MLX90614_TOBJ1);
char buf[32];
sprintf(buf, "TA: %.1f C", ta);
TFT_Text(&htft, buf, 0, 0, TFT_WHITE, TFT_BLACK);
sprintf(buf, "TOBJ1: %.1f C", tobj1);
TFT_Text(&htft, buf, 0, 20, TFT_WHITE, TFT_BLACK);
HAL_Delay(1000);
}
}
float readTemp(uint8_t reg)
{
uint8_t buf[3];
HAL_I2C_Mem_Read(&hi2c1, MLX90614_ADDR, reg, 1, buf, 3, HAL_MAX_DELAY);
int16_t temp = (buf[1] << 8) | buf[0];
return temp * 0.02 - 273.15;
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Supply configuration update enable */
HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);
/** Configure the main internal regulator output voltage */
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
while (!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY))
{
}
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
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();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
| 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();
}
}
```
代码中的readTemp函数通过I2C读取MLX90614的温度寄存器,并将读取到的数据转换为温度值。在主函数中,调用readTemp函数读取TA和TOBJ1的温度值,并将其显示在TFT彩屏上。为了简化代码,这里使用了一个死循环来不断读取和显示温度值,实际应用中需要根据具体需求进行修改。
最后,编译并下载代码到STM32F103RCT6上,接上MLX90614和TFT彩屏,即可实现体温检测并在彩屏上显示温度数据。