EFM32 LEUART source code.doc

// for EFM32 STK3300 #include <> #include <> #include "" #include "" #include "" #include "" #include "" volatile uint32_t msTicks; void Delay(uint32_t dlyTicks); LEUART_Init_TypeDef leuart0Init = { .enable = leuartEnable, .refFreq = 0, .baudrate = 9600, .databits = leuartDatabits8, .parity = leuartNoParity, .stopbits = leuartStopbits2, }; // 系统 TIC void SysTick_Handler(void) { msTicks++; } // 延时 void Delay(uint32_t dlyTicks) { uint32_t curTicks; curTicks = msTicks; while ((msTicks - curTicks) < dlyTicks) ; } // 初始化 Leuart void initLeuart(void) { LEUART_Reset(LEUART0); LEUART_Init(LEUART0, &leuart0Init); // 使用 PIN PD4 PD5 Leuart location0 LEUART0->ROUTE = LEUART_ROUTE_TXPEN | LEUART_ROUTE_RXPEN | LEUART_ROUTE_LOCATION_LOC0; //PD4 TX PD5 RX GPIO_PinModeSet(gpioPortD, 4, gpioModePushPull, 1); GPIO_PinModeSet(gpioPortD, 5, gpioModePushPull, 1); // 允许中断 LEUART_IntEnable(LEUART0, LEUART_IEN_RXDATAV); NVIC_EnableIRQ(LEUART0_IRQn); } void LEUART0_IRQHandler(void) { uint8_t RxData; uint32_t leuart_IntFlag; leuart_IntFlag = LEUART_IntGet(LEUART0); // 当接收到中断数据且数据为 0x5 改变 PD7 状态 STK3300 开发板 PD7 为 LED if( leuart_IntFlag & LEUART_IF_RXDATAV) { RxData = LEUART0->RXDATA; if (RxData == 0x5) { GPIO_PinOutToggle(gpioPortD, 7); }} LEUART_IntClear(LEUART0, ~_LEUART_IFC_RESETVALUE); }