哪位能帮忙找个错？下到板子上没反应。
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9); // PLLCLK = 8MHz * 9 = 72 MHz
RCC_PLLCmd(ENABLE); // Enable PLL
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
; // Wait till PLL is ready
}
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); // Select PLL as system clock source
while (RCC_GetSYSCLKSource() != 0x08) // Wait till PLL is used as system clock source
{
;
}
}
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD,ENABLE);
}
void GPIO_Configration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
}
void NVIC_Configration(void)
{
#ifdef VECT_TAB_RAM
NVIC_SetVectorTable(NVIC_VectTab_RAM,0x0);
#else
NVIC_SetVectorTable(NVIC_VectTab_FLASH,0x0);
#endif
}
void USART_Configration(void)
{
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate=56000;
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(USART1,&USART_InitStructure);
USART_Cmd(USART1,ENABLE);
}
void delay(u32 z)
{
u32 x,y;
for(x=z;x>0;x--)
for(y=1100;y>0;y--);
}
PUTCHAR_PROTOTYPE
{
/* Place your implementation of fputc here */
/* e.g. write a character to the USART */
USART_SendData(USART1, (uint8_t) ch); /*发送一个字符函数*/
/* Loop until the end of transmission */
while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)/*等待发送完成*/
{
}
return ch;
} |
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