LORA模块开发基础教程目录
物联网国赛LORA模块开发基础教程—开发环境配置物联网国赛LORA模块开发基础教程—输出(LED)物联网国赛LORA模块开发基础教程—输入(按键)物联网国赛LORA模块开发基础教程—OLED屏幕物联网国赛LORA模块开发基础教程—传感器物联网国赛LORA模块开发基础教程—定时器物联网国赛LORA模块开发基础教程—串口收发物联网国赛LORA模块开发基础教程—读写内部FALSH物联网国赛LORA模块开发基础教程—点对点通信物联网国赛LORA模块开发基础教程(通用库)—定时器
1.本节内容
定时器2定时器3滴答定时器2.本节函数
//定时器2setTimer2Callback(Time2Handler);Tim2McuInit(1);//定时器2初始化，设置定时中断1ms中断一次Tim2McuInit(0);//关闭定时器2//定时器2setTimer2Callback(Time3Handler);Tim3McuInit(1);//定时器3初始化，设置定时中断1ms中断一次//滴答定时器void SysTick_Handler( void )//滴答定时器，1ms中断一次{HAL_IncTick( );HAL_SYSTICK_IRQHandler( );}
3.本节代码
main.c（定时器2、定时器3在此源代码文件初始化）
/********************************************************************************* File Name: main.c* Description : Main program body*******************************************************************************/#include <string.h>#include "board.h"#include "hal_key.h"#include "tim-board.h"#include "timer_handles.h"/***********************************************************************************************函数：void Init( void )*功能：平台初始化*输入：无*输出：无*特殊说明：无**********************************************************************************************/void Init() {// 开发板平台初始化BoardInitMcu();BoardInitPeriph();keys_init();//按键初始化setTimer2Callback(Time2Handler);Tim2McuInit(1);//定时器初始化，单位:1ms，所以参数设置1时，定时中断1ms中断一次setTimer3Callback(Time3Handler);Tim3McuInit(4);//定时器初始化，单位:0.25ms，所以参数设置为4时，定时中断1ms中断一次}/***********************************************************************************************函数：void KeyDownHandler( void )*功能：按钮事件监听*输入：无*输出：无*特殊说明：无**********************************************************************************************/void KeyDownHandler(void) {}/***********************************************************************************************函数：void handlerPre10Ms( void )*功能：10毫秒循环*输入：无*输出：无*特殊说明：循环处理总时长300ms**********************************************************************************************/void handlerPre10Ms(void) {for (int delay = 0; delay < 30; delay++) {HAL_Delay(10);}}/*** Main application entry point.*/int main( void ){Init();while( 1 ){}}
timer_handles.c（定时器2、定时器3在此源代码文件使用）
/* Includes ------------------------------------------------------------------*/#include "timer_handles.h"#include "key_scaner.h"uint16_t Time2_Time = 1000;uint16_t Time3_Time = 1000;void Time2Handler(){keyScanner();if(!Time2_Time--){Time2_Time = 1000;GpioToggle(&Led1);}}void Time3Handler(){if(!Time3_Time--){Time3_Time = 1000;GpioToggle(&Led2);}}
board.c（滴答定时器在此源代码文件使用）
/*/ _____) _ | |( (____ _____ ____ _| |_ _____ ____| |__\____ \| ___ | (_ _) ___ |/ ___) _ \_____) ) ____| | | || |_| ____( (___| | | |(______/|_____)_|_|_| \__)_____)\____)_| |_|(C) SemtechDescription: Target board general functions implementationLicense: Revised BSD License, see LICENSE.TXT file include in the projectMaintainer: Miguel Luis and Gregory Cristian*/#include "board.h"/*!* Unique Devices IDs register set ( STM32L1xxx )*/#define ID1 ( 0x1FF80050 )#define ID2 ( 0x1FF80054 )#define ID3 ( 0x1FF80064 )/*!* LED GPIO pins objects*/Gpio_t Led1;Gpio_t Led2;Gpio_t Key2;/** MCU objects*/Adc_t Adc;Uart_t Uart1;#if defined( USE_USB_CDC )Uart_t UartUsb;#endif/*!* Initializes the unused GPIO to a know status*/static void BoardUnusedIoInit( void );/*!* System Clock Configuration*/static void SystemClockConfig( void );/*!* Used to measure and calibrate the system wake-up time from STOP mode*/static void CalibrateSystemWakeupTime( void );/*!* System Clock Re-Configuration when waking up from STOP mode*/static void SystemClockReConfig( void );/*!* Timer used at first boot to calibrate the SystemWakeupTime*/static TimerEvent_t CalibrateSystemWakeupTimeTimer;/*!* Flag to indicate if the MCU is Initialized*/static bool McuInitialized = false;/*!* Flag to indicate if the SystemWakeupTime is Calibrated*/static bool SystemWakeupTimeCalibrated = false;/*!* Callback indicating the end of the system wake-up time calibration*/static void OnCalibrateSystemWakeupTimeTimerEvent( void ){SystemWakeupTimeCalibrated = true;}/*!* Nested interrupt counter.** \remark Interrupt should only be fully disabled once the value is 0*/static uint8_t IrqNestLevel = 0;void BoardDisableIrq( void ){__disable_irq( );IrqNestLevel++;}void BoardEnableIrq( void ){IrqNestLevel--;if( IrqNestLevel == 0 ){__enable_irq( );}}void BoardInitPeriph( void ){GpioInit( &Led1, LED_1, PIN_OUTPUT, PIN_PUSH_PULL, PIN_NO_PULL, 0 );GpioInit( &Led2, LED_2, PIN_OUTPUT, PIN_PUSH_PULL, PIN_NO_PULL, 0 );GpioInit( &Key2, KEY_2, PIN_INPUT, PIN_PUSH_PULL, PIN_PULL_UP, 0 );// Switch LED 1, 2 OFFGpioWrite( &Led1, 1 );GpioWrite( &Led2, 1 );GpioWrite( &Key2, 1 );}void BoardInitMcu( void ){if( McuInitialized == false ){#if defined( USE_BOOTLOADER )// Set the Vector Table base location at 0x3000SCB->VTOR = FLASH_BASE | 0x3000;#endifHAL_Init( );SystemClockConfig( );#if defined( USE_USB_CDC )UartInit( &UartUsb, UART_USB_CDC, NC, NC );UartConfig( &UartUsb, RX_TX, 115200, UART_8_BIT, UART_1_STOP_BIT, NO_PARITY, NO_FLOW_CTRL );DelayMs( 1000 ); // 1000 ms for Usb initialization#endifRtcInit( );BoardUnusedIoInit( );}else{SystemClockReConfig( );}SpiInit( &SX1276.Spi, RADIO_MOSI, RADIO_MISO, RADIO_SCLK, NC );SX1276IoInit( );if( McuInitialized == false ){McuInitialized = true;if( GetBoardPowerSource( ) == BATTERY_POWER ){CalibrateSystemWakeupTime( );}}}void BoardDeInitMcu( void ){Gpio_t ioPin;AdcDeInit( &Adc );SpiDeInit( &SX1276.Spi );SX1276IoDeInit( );GpioInit( &ioPin, OSC_HSE_IN, PIN_ANALOGIC, PIN_PUSH_PULL, PIN_NO_PULL, 0 );GpioInit( &ioPin, OSC_HSE_OUT, PIN_ANALOGIC, PIN_PUSH_PULL, PIN_NO_PULL, 0 );GpioInit( &ioPin, OSC_LSE_IN, PIN_INPUT, PIN_PUSH_PULL, PIN_NO_PULL, 0 );GpioInit( &ioPin, OSC_LSE_OUT, PIN_INPUT, PIN_PUSH_PULL, PIN_NO_PULL, 0 );}uint32_t BoardGetRandomSeed( void ){return ( ( *( uint32_t* )ID1 ) ^ ( *( uint32_t* )ID2 ) ^ ( *( uint32_t* )ID3 ) );}void BoardGetUniqueId( uint8_t *id ){id[7] = ( ( *( uint32_t* )ID1 )+ ( *( uint32_t* )ID3 ) ) >> 24;id[6] = ( ( *( uint32_t* )ID1 )+ ( *( uint32_t* )ID3 ) ) >> 16;id[5] = ( ( *( uint32_t* )ID1 )+ ( *( uint32_t* )ID3 ) ) >> 8;id[4] = ( ( *( uint32_t* )ID1 )+ ( *( uint32_t* )ID3 ) );id[3] = ( ( *( uint32_t* )ID2 ) ) >> 24;id[2] = ( ( *( uint32_t* )ID2 ) ) >> 16;id[1] = ( ( *( uint32_t* )ID2 ) ) >> 8;id[0] = ( ( *( uint32_t* )ID2 ) );}/*!* Factory power supply*/#define FACTORY_POWER_SUPPLY 3300 // mV/*!* VREF calibration value*/#define VREFINT_CAL ( *( uint16_t* )0x1FF80078 )/*!* ADC maximum value*/#define ADC_MAX_VALUE 4095/*!* Battery thresholds*/#define BATTERY_MAX_LEVEL 4150 // mV#define BATTERY_MIN_LEVEL 3200 // mV#define BATTERY_SHUTDOWN_LEVEL 3100 // mVstatic uint16_t BatteryVoltage = BATTERY_MAX_LEVEL;uint16_t BoardBatteryMeasureVolage( void ){return BATTERY_MAX_LEVEL;}uint32_t BoardGetBatteryVoltage( void ){return BatteryVoltage;}uint8_t BoardGetBatteryLevel( void ){uint8_t batteryLevel = 0;BatteryVoltage = BoardBatteryMeasureVolage( );if( GetBoardPowerSource( ) == USB_POWER ){batteryLevel = 0;}else{if( BatteryVoltage >= BATTERY_MAX_LEVEL ){batteryLevel = 254;}else if( ( BatteryVoltage > BATTERY_MIN_LEVEL ) && ( BatteryVoltage < BATTERY_MAX_LEVEL ) ){batteryLevel = ( ( 253 * ( BatteryVoltage - BATTERY_MIN_LEVEL ) ) / ( BATTERY_MAX_LEVEL - BATTERY_MIN_LEVEL ) ) + 1;}else if( ( BatteryVoltage > BATTERY_SHUTDOWN_LEVEL ) && ( BatteryVoltage <= BATTERY_MIN_LEVEL ) ){batteryLevel = 1;}else //if( BatteryVoltage <= BATTERY_SHUTDOWN_LEVEL ){batteryLevel = 255;//GpioInit( &DcDcEnable, DC_DC_EN, PIN_OUTPUT, PIN_PUSH_PULL, PIN_NO_PULL, 0 );//GpioInit( &BoardPowerDown, BOARD_POWER_DOWN, PIN_OUTPUT, PIN_PUSH_PULL, PIN_NO_PULL, 1 );}}return batteryLevel;}static void BoardUnusedIoInit( void ){Gpio_t ioPin;if( GetBoardPowerSource( ) == BATTERY_POWER ){GpioInit( &ioPin, USB_DM, PIN_ANALOGIC, PIN_PUSH_PULL, PIN_NO_PULL, 0 );GpioInit( &ioPin, USB_DP, PIN_ANALOGIC, PIN_PUSH_PULL, PIN_NO_PULL, 0 );}GpioInit( &ioPin, BOOT_1, PIN_ANALOGIC, PIN_OPEN_DRAIN, PIN_NO_PULL, 0 );GpioInit( &ioPin, WKUP1, PIN_ANALOGIC, PIN_PUSH_PULL, PIN_NO_PULL, 0 );#if defined( USE_DEBUGGER )HAL_DBGMCU_EnableDBGStopMode( );HAL_DBGMCU_EnableDBGSleepMode( );HAL_DBGMCU_EnableDBGStandbyMode( );#elseHAL_DBGMCU_DisableDBGSleepMode( );HAL_DBGMCU_DisableDBGStopMode( );HAL_DBGMCU_DisableDBGStandbyMode( );GpioInit( &ioPin, SWDIO, PIN_ANALOGIC, PIN_PUSH_PULL, PIN_NO_PULL, 0 );GpioInit( &ioPin, SWCLK, PIN_ANALOGIC, PIN_PUSH_PULL, PIN_NO_PULL, 0 );#endif}void SystemClockConfig( void ){RCC_OscInitTypeDef RCC_OscInitStruct;RCC_ClkInitTypeDef RCC_ClkInitStruct;RCC_PeriphCLKInitTypeDef PeriphClkInit;__HAL_RCC_PWR_CLK_ENABLE( );__HAL_PWR_VOLTAGESCALING_CONFIG( PWR_REGULATOR_VOLTAGE_SCALE1 );RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_LSE;RCC_OscInitStruct.HSEState = RCC_HSE_ON;RCC_OscInitStruct.LSEState = RCC_LSE_ON;RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL8;//RCC_OscInitStruct.PLL.PLLDIV = RCC_PLL_DIV3;//官方原版配置：外部晶振12MHZ，SystemCoreClock = 12000000*8/3 =32000000HZ;RCC_OscInitStruct.PLL.PLLDIV = RCC_PLL_DIV2;//新大陆LORA模块上的配置：外部晶振8MHZ，SystemCoreClock = 8000000*8/2 =32000000HZ;if( HAL_RCC_OscConfig( &RCC_OscInitStruct ) != HAL_OK ){assert_param( FAIL );}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_1 ) != HAL_OK ){assert_param( FAIL );}PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_RTC;PeriphClkInit.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;if( HAL_RCCEx_PeriphCLKConfig( &PeriphClkInit ) != HAL_OK ){assert_param( FAIL );}HAL_SYSTICK_Config( HAL_RCC_GetHCLKFreq( ) / 1000 );HAL_SYSTICK_CLKSourceConfig( SYSTICK_CLKSOURCE_HCLK );// HAL_NVIC_GetPriorityGroupingHAL_NVIC_SetPriorityGrouping( NVIC_PRIORITYGROUP_4 );// SysTick_IRQn interrupt configurationHAL_NVIC_SetPriority( SysTick_IRQn, 0, 0 );}void CalibrateSystemWakeupTime( void ){if( SystemWakeupTimeCalibrated == false ){TimerInit( &CalibrateSystemWakeupTimeTimer, OnCalibrateSystemWakeupTimeTimerEvent );TimerSetValue( &CalibrateSystemWakeupTimeTimer, 1000 );TimerStart( &CalibrateSystemWakeupTimeTimer );while( SystemWakeupTimeCalibrated == false ){TimerLowPowerHandler( );}}}void SystemClockReConfig( void ){__HAL_RCC_PWR_CLK_ENABLE( );__HAL_PWR_VOLTAGESCALING_CONFIG( PWR_REGULATOR_VOLTAGE_SCALE1 );/* Enable HSE */__HAL_RCC_HSE_CONFIG( RCC_HSE_ON );/* Wait till HSE is ready */while( __HAL_RCC_GET_FLAG( RCC_FLAG_HSERDY ) == RESET ){}/* Enable PLL */__HAL_RCC_PLL_ENABLE( );/* Wait till PLL is ready */while( __HAL_RCC_GET_FLAG( RCC_FLAG_PLLRDY ) == RESET ){}/* Select PLL as system clock source */__HAL_RCC_SYSCLK_CONFIG ( RCC_SYSCLKSOURCE_PLLCLK );/* Wait till PLL is used as system clock source */while( __HAL_RCC_GET_SYSCLK_SOURCE( ) != RCC_SYSCLKSOURCE_STATUS_PLLCLK ){}}uint16_t SysTick_Time = 1000;void SysTick_Handler( void )//滴答定时器，1ms中断一次{//选手在此添加代码if(!SysTick_Time--)//1S周期改变LED1状态{SysTick_Time = 1000;//GpioToggle(&Led1);}HAL_IncTick( );HAL_SYSTICK_IRQHandler( );}uint8_t GetBoardPowerSource( void )#if (USE_BATTERY != false){return BATTERY_POWER;//电池供电}#else{return USB_POWER;//USB供电}#endif /*(USE_BATTERY != false)*/#ifdef USE_FULL_ASSERT/** Function Name : assert_failed* Description : Reports the name of the source file and the source line number* where the assert_param error has occurred.* Input: - file: pointer to the source file name* - line: assert_param error line source number* Output : None* Return : None*/void assert_failed( uint8_t* file, uint32_t line ){/* 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) *//* Infinite loop */while( 1 ){}}#endif
4.实验效果
定时器2定时器3滴答定时器5.本节相关知识
切忌：定时器里千万千万不要写延时函数
6.本节资源
百度网盘: 本节源码
