藍橋杯嵌入式 USART

2021-10-01 17:43:54 字數 2795 閱讀 1732

乙個是串列埠

1(pa9,pa10)

，乙個是串列埠

2(pa2,pa3)

我們的藍橋杯嵌入式開發板並不能直接使用串列埠

1rxbuf

是用來儲存串列埠的接收資料的，

rxover

為接收串列埠結束標誌位，

rxcunt

為串列埠接收計數值

#ifndef __usart_h


#define __usart_h


#include "stm32f10x.h"


void usart2_init(u32 bound);


void usart2_sendstring(u8 *str);


#endif


#include "usart.h"


void usart2_init(u32 bound)


/** * @說明 usart2字串傳送函式


* @引數 str: 指向字串的指標


* @返回值 none


*/void usart2_sendstring(u8 *str)


while(str[index] != 0); //檢查字串結束標誌


}
#include "stm32f10x.h"


#include "lcd.h"


#include "usart.h"


u32 timingdelay = 0;


u8 rxbuf[20];


u8 rxover=0;


u8 rxcunt=0;


u8 i;


void delay_ms(u32 ntime);


//main body


int main(void)


usart_itconfig(usart2,usart_it_rxne,enable);


rxover=0;


} //usart2_sendstring("sam\r\n"); }}


//延時函式


void delay_ms(u32 ntime)


//stm32f10x_it.c


extern u8 rxbuf[20];


extern u8 rxover;


extern u8 rxcunt;


void usart2_irqhandler(void)


else}}
stm32韌體庫v3.5\stm32f10x_stdperiph_lib_v3.5.0\project\stm32f10x_stdperiph_examples\usart\interrupt

usart_inittypedef usart_initstructure;


usart_initstructure.usart_baudrate = 9600;


usart_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(usarty, &usart_initstructure);


usart_itconfig(usarty, usart_it_rxne, enable);


usart_cmd(usarty, enable);


gpio_inittypedef gpio_initstructure;


gpio_initstructure.gpio_pin = usarty_rxpin;


gpio_initstructure.gpio_mode = gpio_mode_in_floating;


gpio_init(usarty_gpio, &gpio_initstructure);


gpio_initstructure.gpio_pin = usarty_txpin;


gpio_initstructure.gpio_speed = gpio_speed_50mhz;


gpio_initstructure.gpio_mode = gpio_mode_af_pp;


gpio_init(usarty_gpio, &gpio_initstructure);


nvic_inittypedef nvic_initstructure;


nvic_initstructure.nvic_irqchannel = usarty_irqn;


nvic_initstructure.nvic_irqchannelsubpriority = 0;


nvic_initstructure.nvic_irqchannelcmd = enable;


nvic_init(&nvic_initstructure);

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