#include "stm32f10x.h"
void Delay(unsigned int x);
void GPIO_Configuration(void);
void UART_Init(void);
void UART2_PutChar(u8 ch);
int main(void)
{
SystemInit();
unsigned int temp;
GPIO_Configuration();
UART_Init();
while(1)
{
for(temp=0;temp<50;temp++)
{Delay(65500);}
UART2_PutChar(0x55);
}
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDefGPIO_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE); //USART2时钟在APB1上
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode =GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed= GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode =GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed= GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
}
void UART_Init(void)
{
USART_InitTypeDefUSART_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(USART2,&USART_InitStructure);
USART_Cmd(USART2,ENABLE);
}
void UART2_PutChar(u8 ch)
{
USART_SendData(USART2,ch);
while(USART_GetFlagStatus(USART2,USART_FLAG_TXE)== RESET);
}
void Delay(unsigned int x)
{
unsigned int t;
t=x;
while(t--);
}
切记！！！在options设置中C/C++ Compiler的Preprocessor选项卡的defined symbols中填入STM32F10X_HD需要和你的芯片类型对应！！否则发送错误！！
startup_stm32f10x_cl.s互联型的器件，STM32F105xx，STM32F107xx
startup_stm32f10x_hd.s大容量的STM32F101xx，STM32F102xx，STM32F103xx
startup_stm32f10x_hd_vl.s 大容量的STM32F100xx
startup_stm32f10x_ld.s小容量的STM32F101xx，STM32F102xx，STM32F103xx
startup_stm32f10x_ld_vl.s 小容量的STM32F100xx
startup_stm32f10x_md.s中容量的STM32F101xx，STM32F102xx，STM32F103xx
startup_stm32f10x_md_vl.s 中容量的STM32F100xx
startup_stm32f10x_xl.sFLASH在512K到1024K字节的STM32F101xx，STM32F102xx，STM32F103xx
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