一、传感器介绍
MTS4系列是数字模拟混合信号温度传感芯片,最高测温精度±0.1℃,用户无需进行校准。温度芯片感温原理基于CMOS半导体PN节温度与带隙电压的特性关系,经过小信号放大、模数转换、数字校准补偿后,数字总线输出,具有精度高、一致性好、测温快、功耗低、可编程配置灵活、寿命长等优点。
芯片内置16-bit ADC,分辨率0.004°C,具有-103°C到+153°C的超宽工作范围。芯片在出厂前经过100%的测试校准,根据温度误差特性进行校准系数的拟合,芯片内部自动进行补偿计算。芯片支持数字I2C通信接口、测温数据内存访问、功能配置等均可通过数字协议指令实现。I2C接口适合高速率的板级应用场景,最高接口速度可达2MHz。
芯片内置非易失性E2PROM存储单元,用于保存芯片ID号、高低温报警阈值、温度校准修正值以及用户自定义信息,如传感器节点编号、位置信息等。
二、驱动说明
官方提供了IIC和单总线的驱动例程,但使用的MCU为MM32SPIN05,由于手上没有MM32SPIN05的开发板,所以将例程改为STM32F103的。
使用STM32CubeMX生成集成代码,基础代码包含USART1、GPIO、RCC,外设驱动库使用LL库。
三、硬件接口
SCL---PC6
SDA---PC7
UART_TX---PA9
LED---PC13
四、主代码
/* USER CODE BEGIN Header */
/********************************************************************************* @file : main.c* @brief : Main program body******************************************************************************* @attention** Copyright (c) 2024 STMicroelectronics.* All rights reserved.** This software is licensed under terms that can be found in the LICENSE file* in the root directory of this software component.* If no LICENSE file comes with this software, it is provided AS-IS.********************************************************************************/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "usart.h"
#include "gpio.h"/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stdio.h"
#include "delay.h"
#include "T117_MTS4_I2C.h"
/* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD *//* USER CODE END PTD *//* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD *//* USER CODE END PD *//* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM *//* USER CODE END PM *//* Private variables ---------------------------------------------------------*//* USER CODE BEGIN PV *//* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 *//* USER CODE END 0 *//*** @brief The application entry point.* @retval int*/
int main(void)
{/* USER CODE BEGIN 1 */uint8_t status,Cfg;uint16_t Temp_u16;float Temp_f;/* USER CODE END 1 *//* MCU Configuration--------------------------------------------------------*//* Reset of all peripherals, Initializes the Flash interface and the Systick. */LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_AFIO);LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);/* System interrupt init*/NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);/* SysTick_IRQn interrupt configuration */NVIC_SetPriority(SysTick_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),15, 0));/** DISABLE: JTAG-DP Disabled and SW-DP Disabled*/LL_GPIO_AF_DisableRemap_SWJ();/* USER CODE BEGIN Init *//* USER CODE END Init *//* Configure the system clock */SystemClock_Config();/* USER CODE BEGIN SysInit */SysTick_Init();/* USER CODE END SysInit *//* Initialize all configured peripherals */MX_GPIO_Init();MX_USART1_UART_Init();/* USER CODE BEGIN 2 */printf("App start\n");printf("SystemCoreClock:%d\n", SystemCoreClock);uint8_t ID[8];if( MY_ReadID( ID ) == 0){printf("MTS4:%02X%02X\n", ID[1], ID[0]);}if(T117I2C_Transmit(I2C_ADDR, EE_Cmd,0xB8)!= GPIOI2C_XFER_LASTACK){PR("Recall FALSE\n");}delay_ms(2);MY_ReadStatusConfig( &status, &Cfg);PR("SC:%2X %2X\r\n",status,Cfg); /* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE *//* USER CODE BEGIN 3 */LL_GPIO_TogglePin(GPIOC, LL_GPIO_PIN_13);if( MY_ConvertTemp()== 1){delay_ms(tCon_A32);MY_ReadTempWaiting(&Temp_u16);Temp_f=MY_OutputtoTemp((int16_t)Temp_u16);PR("temp:%.2f\r\n",Temp_f); }delay_ms(980);}/* USER CODE END 3 */
}/*** @brief System Clock Configuration* @retval None*/
void SystemClock_Config(void)
{LL_FLASH_SetLatency(LL_FLASH_LATENCY_0);while(LL_FLASH_GetLatency()!= LL_FLASH_LATENCY_0){}LL_RCC_HSI_SetCalibTrimming(16);LL_RCC_HSI_Enable();/* Wait till HSI is ready */while(LL_RCC_HSI_IsReady() != 1){}LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_HSI);/* Wait till System clock is ready */while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_HSI){}LL_Init1msTick(8000000);LL_SetSystemCoreClock(8000000);
}/* USER CODE BEGIN 4 *//* USER CODE END 4 *//*** @brief This function is executed in case of error occurrence.* @retval None*/
void Error_Handler(void)
{/* USER CODE BEGIN Error_Handler_Debug *//* User can add his own implementation to report the HAL error return state */__disable_irq();while (1){}/* USER CODE END Error_Handler_Debug */
}#ifdef USE_FULL_ASSERT
/*** @brief Reports the name of the source file and the source line number* where the assert_param error has occurred.* @param file: pointer to the source file name* @param line: assert_param error line source number* @retval None*/
void assert_failed(uint8_t *file, uint32_t line)
{/* USER CODE BEGIN 6 *//* User can add his own implementation to report the file name and line number,ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) *//* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */