stm32f030 UART Applications

= = File uart.h============================================================ #ifndef _uart_h_#define _UART_H_#defineV _uart_rx0//Receive status #definev_uart_tx1//send status #definev_rx_num11//receive data byte long #definev_tx_num8//Send data byte length #definevt_ CLRRXINDEX5//50MS received no data purge receive index//==================================================extern uint8 Rx_Buf[V_RX_NUM];  extern uint8 Tx_buf[v_tx_num]; extern uint8 rx_index; extern uint8 tx_index; extern void Uart_putc (unsigned char c); extern void Uart_puts (char *s), extern void Usart_init (void), extern void Usart_gpio_init (void), extern void Usart_param_init (U Int32 invalue), extern void Init_uart_senddat (Uint8 invalue), extern uint8 Calcatechecksumuart (uint8 *a,uint8 datalong); #endif//== file uart.c============================================================ #include "global.h" #include " Uart.h "#define INIT_UART_CALLUINT8 rx_buf[v_rx_num]; uint8 tx_buf[v_tx_num]; uint8 rx_index = 0; Uint8 tx_index = 0; #ifdef init_uart_call//*************************************//function Name: Usart_gpio_init//function: UART GPIO initialization//Ingress parameters: none//Export parameters: none//Note://***************************************void usart_gpio_init ( void) {Gpio_inittypedef gpio_initstructure; Rcc_ahbperiphclockcmd (Rcc_ahbperiph_gpiob, ENABLE);//-----PB6 TX------------------PB7 RX-------------Gpio_ Initstructure.gpio_pin = gpio_pin_6|                 gpio_pin_7; Gpio_initstructure.gpio_mode = GPIO_MODE_AF; Gpio_initstructure.gpio_otype = gpio_otype_pp; GPIO_INITSTRUCTURE.GPIO_PUPD = gpio_pupd_up; Gpio_initstructure.gpio_speed = Gpio_speed_50mhz; Gpio_init (Gpiob, &gpio_initstructure); Gpio_pinafconfig (Gpiob, Gpio_pinsource6, gpio_af_0); Gpio_pinafconfig (Gpiob, Gpio_pinsource7, gpio_af_0);}  ====== serial port Send IO status initialization ======================================void usart_param_init (UInt32 invalue) {gpio_inittypedef Gpio_initstructure; Rcc_ahbperiphclockcmd (Rcc_ahbperiph_gpiob, ENABLE);//-----PB7 RX-------------received as UART Gpio_initstructure.gpio_pin =                 gpio_pin_7; Gpio_initstructure.gpio_mode = GPIO_MODE_AF; Gpio_initstruCture. Gpio_otype = gpio_otype_pp; GPIO_INITSTRUCTURE.GPIO_PUPD = gpio_pupd_up; Gpio_initstructure.gpio_speed = Gpio_speed_50mhz; Gpio_init (Gpiob, &gpio_initstructure);  Gpio_pinafconfig (Gpiob, Gpio_pinsource7, gpio_af_0); if (invalue = V_UART_RX)//Receive status {//-----PB6 TX-------------sent as input                 Gpio_initstructure.gpio_pin = Gpio_pin_6; Gpio_initstructure.gpio_mode = gpio_mode_in; Gpio_initstructure.gpio_otype = gpio_otype_pp; Gpio_otype_od;//gpio_initstructure.gpio_pupd = gpio_pupd_up;//gpio_pupd_down;//; Gpio_initstructure.gpio_speed = Gpio_speed_50mhz; Gpio_init (Gpiob, &gpio_initstructure); Usart_clearitpendingbit (USART1,USART_IT_RXNE); Clear receive Interrupt flag usart_itconfig (usart1,usart_it_rxne,enable);//Receive interrupt enable Usart_itconfig (usart1,usart_it_tc,disable); Send interrupt does not enable Usart_it_txe}else if (Invalue = = v_uart_tx)//Send status {//-----PB6 RX-------------sent as UART Gpio_                 Initstructure.gpio_pin = Gpio_pin_6; Gpio_initstructure.gpio_mode = GPIO_MODE_AF; Gpio_initstructure.gpio_otype = Gpio_oTYPE_PP; GPIO_INITSTRUCTURE.GPIO_PUPD = gpio_pupd_up; Gpio_initstructure.gpio_speed = Gpio_speed_50mhz; Gpio_init (Gpiob, &gpio_initstructure); Gpio_pinafconfig (Gpiob, Gpio_pinsource6, gpio_af_0); Usart_itconfig (usart1,usart_it_rxne,disable);//Receive interrupt does not enable Usart_clearitpendingbit (USART1,USART_IT_TC);// Clear Send Interrupt flag usart_itconfig (usart1,usart_it_tc,enable); Send interrupt enable usart_it_txe}}//*************************************//function name: usart_init//function: UART initialization//inlet parameter: none//Export parameter: none// Remark://***************************************void usart_init (void) {usart_inittypedef usart_initstructure; Nvic_inittypedef nvic_initstructure; Rcc_apb2periphclockcmd (Rcc_apb2periph_usart1, ENABLE); Nvic_initstructure.nvic_irqchannel = USART1_IRQN; Nvic_initstructure.nvic_irqchannelpriority = 2; Nvic_initstructure.nvic_irqchannelcmd = ENABLE;   Nvic_init (&nvic_initstructure); Usart_initstructure.usart_baudrate = 4800;//9600usart_initstructure.usart_wordlength = USART_WordLength_8b; Usart_initstructure.usart_stopbits = Usart_stopbits_1; usart_initstructure.usart_parity = Usart_parity_no; Usart_initstructure.usart_hardwareflowcontrol = Usart_hardwareflowcontrol_none; Usart_initstructure.usart_mode = Usart_mode_rx | Usart_mode_tx; Usart_init (USART1, &usart_initstructure); Usart_cmd (USART1, ENABLE); Usart_clearitpendingbit (USART1,USART_IT_RXNE); Clear receive Interrupt flag usart_itconfig (usart1,usart_it_rxne,enable);//Receive interrupt enable Usart_clearitpendingbit (USART1,USART_IT_TC);// Clear Send Interrupt flag//usart_itconfig (usart1,usart_it_tc,enable); Send interrupt enable usart_it_txe}//*************************************//function name: uart_putc//function: UART send one character//inlet parameter: none//Export parameter: none// Note://***************************************void uart_putc (unsigned char c) {while (!) ( (USART1-&GT;ISR) & (1<<7)); Usart1->tdr=c;} Function Name: uart_puts//function: UART sends a string//entry parameter: none//Export parameter: none//Note://*************** void Uart_puts (char *s) {while (*s) UART_PUTC (*s++);} Function Name: uart_puts//function function: UART sends a string//entry parameterNumber: no//Export parameters: none//Note://***************************************void init_uart_senddat (uint8 invalue) {tx_buf[0] = 0xc3; TX_BUF[1] = 0x00; TX_BUF[2] = 0x00; TX_BUF[3] = 0x00; TX_BUF[4] = 0x00; TX_BUF[5] = 0x00; TX_BUF[6] = Invalue; Tx_buf[v_tx_num-1] = Calcatechecksumuart (&tx_buf[0], (v_tx_num-1)); Usart_param_init (V_UART_TX); Initialize port when sending data Tx_index = 0; UART_PUTC (Tx_buf[tx_index]); Tx_index + +;} Function Name: uart_puts//function: UART sends a string//entry parameter: none//Export parameter: none//Note://*************** Uint8 Calcatechecksumuart (uint8 *a,uint8 datalong) {uint8 i; uint8 tmp=0; for (i=0;i< datalong;i++) {Tmp + = A[i];} TMP = (tmp^0xff) +1; return tmp;} #endif//init_uart_call

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stm32f030 UART Applications