接上篇:STM32F0的LL库使用(三) - x; u8 U. [' w2 S; ~+ e3 _% } 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) 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:; Q1 S2 X, N: l: F int main(void) { /* USER CODE BEGIN 1 */ ( i" ~. @) f/ ?0 G" _3 x /* USER CODE END 1 */* D g% b3 H! k5 v /* MCU Configuration----------------------------------------------------------*/: [: }/ K: g" \; }& l+ ]6 x ! o2 `1 Z" ?& R6 U/ u /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ LL_Init(); /* USER CODE BEGIN Init */ " ]" w% [! y, } /* USER CODE END Init */3 L, }% _3 `2 V0 {, }0 h7 C% ^; Z , D6 G& R4 K1 O9 l+ e, | /* Configure the system clock */- \5 d( S/ S. `& @: P SystemClock_Config(); % x! s L+ c" t+ A U /* USER CODE BEGIN SysInit */. N- k1 ?' y" s y1 ^3 C ; V4 w% X; e, o7 I# F /* USER CODE END SysInit */ 4 u6 I, G5 ?8 w; e" z1 c3 A /* Initialize all configured peripherals */ MX_GPIO_Init();) {0 Z# t+ R6 S+ B+ Y MX_USART1_UART_Init();% U: a# w9 W3 O8 o % a7 Q& n$ o" O /* Initialize interrupts */ MX_NVIC_Init(); /* USER CODE BEGIN 2 */. e% c3 W; E; J; {( M: J ! O# a" A9 m) K! L8 s. t LL_USART_EnableIT_RXNE(USART1); - `# d" p9 r3 C) E USART_Print("Ready for Tx\r\n",(uint32_t) sizeof("Ready for Tx\r\n") );$ h# g, G3 ]% L3 W+ u- s, Q: u /* USER CODE END 2 */ . p" c! ] F' f3 O4 w t /* Infinite loop */: ^+ W; Y$ ^% T: o8 [6 a* A0 O /* USER CODE BEGIN WHILE */ while (1) {6 E+ x; c8 F$ y! n6 Q2 k- Y /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ }4 ?5 h: z' V) e7 Y% ]8 h /* USER CODE END 3 */ ) |' A( {& t, b } 在这写的打印函数,和串口中断服务函数: /* USER CODE BEGIN 4 */, |' E; V) p$ P- p# A5 {7 v void USART_Print(unsigned char *Send_Text,uint32_t Size_Text)% w U' D! I& j4 } n* c, x4 G3 G { , D: \& H6 ?# v, r/ L uint32_t index = 0;9 t- I7 e" f+ K: }5 D 3 N7 i P0 X2 Q5 F$ R for (index = 0; index < Size_Text; index++) { while (!LL_USART_IsActiveFlag_TXE(USART1));- C y3 D8 m1 }+ Q* U LL_USART_TransmitData8(USART1,Send_Text[index]);' {& L8 T$ i7 z1 R; g( ~ d0 ~% v } while (!LL_USART_IsActiveFlag_TC(USART1));2 n: c; T% p ~' Z% Y/ _' L# i } void USART_Reception_Callback(void) {0 ~, K; B7 Q6 r- Z' B7 U' S __IO uint8_t UART_Rxdata;- C$ c& }' b! P0 Y UART_Rxdata = LL_USART_ReceiveData8(USART1); K% u+ C/ ?: f! V/ x: ^6 f! y LL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);5 g8 q9 c, i1 c! ?2 y- Q! M } 1 B9 f5 F3 c- |1 q! |/ O' i /* USER CODE END 4 */ ) f3 ], K, m7 \$ c, Z& l- s. F 5 E# q- q! c' W& s% m0 R& A6 L 在stm32f0xx_it.c里找到 /** * @brief This function handles USART1 global interrupt.5 i9 `, v5 w" C( C2 W */) M( u1 _4 c4 s void USART1_IRQHandler(void) { /* USER CODE BEGIN USART1_IRQn 0 */5 y2 ^* @- l4 m( F5 x 5 @% n$ D1 z* W! L" o t /* USER CODE END USART1_IRQn 0 */ 6 ~9 _! m9 h* f' o3 p" Q7 u /* USER CODE BEGIN USART1_IRQn 1 */ if(LL_USART_IsActiveFlag_RXNE(USART1) && LL_USART_IsEnabledIT_RXNE(USART1))9 f6 {/ O4 V8 }! o { USART_Reception_Callback();//调用串口中断服务函数5 y9 w$ P* |6 G* M4 K3 l }( B/ |$ Q C1 d5 P( M /* USER CODE END USART1_IRQn 1 */ } 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。3 R+ u# }/ ?+ T6 V 注意一下上面的串口中断服务函数要声明一下,再编译。: b8 ` Q0 C- L, g4 [' D3 n ... ... 4 p5 E- Q. u! i3 |1 i ; x7 [/ C R/ L H; r. j8 r2 F% j ) H% K' c) j' I& ^3 q # Z; n2 ]- q. i# O' k |
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点评
几块钱吧,哪有9.5