接上篇:STM32F0的LL库使用(三)5 ~. e4 P1 w- C& L/ w& k1 M+ { : R3 Q: I6 o- @( \8 j 这次来试试串口中断的简单应用。 硬件:STM32F030F4P6核心板,STLINK-V2-1(即NUCLEO板载仿真器拆下来的)- W' o$ Z/ S0 ?5 } 软件:CubeMX(V2.4.0)+IAR(V8.20) LL库版本V1.9.0 初始化完毕后开始写程序了。 主程序:4 ^7 I; e* h% p" N int main(void) { /* USER CODE BEGIN 1 */; K) }; \$ P* ]3 r - V' Z5 {3 H/ s% _- v8 y /* USER CODE END 1 */- y# j+ D9 x i, [) r$ X /* MCU Configuration----------------------------------------------------------*/ 8 k8 M+ v+ y3 o2 H /* Reset of all peripherals, Initializes the Flash interface and the Systick. */& h7 A8 |+ A+ D( m! P; u) G LL_Init(); /* USER CODE BEGIN Init */; g+ z9 }5 W: c7 h: ?! B; F /* USER CODE END Init */- ~) z! Q$ a$ w% B+ }9 ] o& G " `* Y* O3 U3 X0 s) ]) ` /* Configure the system clock */ SystemClock_Config(); /* USER CODE BEGIN SysInit */ # X7 R; \! h" s4 U5 W /* USER CODE END SysInit */' g$ X7 f! ^# X S) _ $ ?" ~3 G0 l. V /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_USART1_UART_Init(); /* Initialize interrupts */ MX_NVIC_Init(); /* USER CODE BEGIN 2 */$ {9 z0 l1 r V7 v ; }" E# X1 [) d6 |+ M, ~7 B LL_USART_EnableIT_RXNE(USART1); USART_Print("Ready for Tx\r\n",(uint32_t) sizeof("Ready for Tx\r\n") ); /* USER CODE END 2 */# ~. h2 _- P3 L2 ~ /* Infinite loop */1 y2 l: i4 V+ ]" D( j9 v, W /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ M3 E8 W0 B( { @0 F p /* USER CODE BEGIN 3 */ }# y7 E4 U/ ]3 C" _9 r /* USER CODE END 3 */ }# Y; Z) I5 A- u" J 在这写的打印函数,和串口中断服务函数:; @( \ n; n" ~ /* USER CODE BEGIN 4 */4 p9 e+ _: E9 [5 G void USART_Print(unsigned char *Send_Text,uint32_t Size_Text) { 7 n! L8 e$ h- O" Y; P, \0 d uint32_t index = 0; for (index = 0; index < Size_Text; index++)4 I- E% M) T0 c3 r' _. k) e { while (!LL_USART_IsActiveFlag_TXE(USART1));% ^+ \6 F" ]2 X# [) ]0 N% } LL_USART_TransmitData8(USART1,Send_Text[index]);) o$ o- S/ _2 J5 B4 R( f# H } : k; u7 C: s) G& |1 w! O+ h while (!LL_USART_IsActiveFlag_TC(USART1));) f( h7 E# m& T } ! N% s; x4 C/ F + x3 P( m( }( o void USART_Reception_Callback(void)/ J& c( n1 B4 t% ]( `' a" X {4 V7 D* P9 l7 m __IO uint8_t UART_Rxdata;7 _4 {1 i, Q4 X# N UART_Rxdata = LL_USART_ReceiveData8(USART1);: u! E3 `; s: T7 r, I LL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin); }0 k- ^! ?" |9 ~' I! i8 _! Y & p+ U' T% {. V. ? /* USER CODE END 4 */ ' n7 @" b, Z( H! E1 k9 N 在stm32f0xx_it.c里找到 /*** j |* J# e- m% b/ P * @brief This function handles USART1 global interrupt.7 U. l9 ~, X* m& g' B */. Z" G! r; F' l1 u/ c1 b+ ? void USART1_IRQHandler(void)8 U* X* `$ G, k { /* USER CODE BEGIN USART1_IRQn 0 */ % y0 ]; a0 e# g5 m /* USER CODE END USART1_IRQn 0 */ /* USER CODE BEGIN USART1_IRQn 1 */ if(LL_USART_IsActiveFlag_RXNE(USART1) && LL_USART_IsEnabledIT_RXNE(USART1)) {8 O* e8 a+ n' S3 z- { USART_Reception_Callback();//调用串口中断服务函数$ ?$ o) I4 v9 r4 I! t$ x }/ `7 B8 g$ y3 t: t; z' D" n /* USER CODE END USART1_IRQn 1 */& I2 Y4 v# u2 m* N2 q } - }7 F9 B; y0 W+ L 打开串口助手来进行实验,发送任意字符,即可翻转A4口上的灯。 注意一下上面的串口中断服务函数要声明一下,再编译。% I/ ^: U) Z6 Z 1 P$ v1 [* \3 K( \$ _, Z! K ... ... 7 b3 c4 w: f7 \+ ~9 g& k |
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点评
几块钱吧,哪有9.5