stm32串口控制视频（双十一，你懂的）：
视频地址：http://player.youku.com/player.php/sid/XODI0MzA3MDY4/v.swf
stm32串口控制代码：
#include "stm32f10x.h"
#include "stm32_eval.h"
#include "stdio.h"
#define buff_size 16;
GPIO_InitTypeDef GPIO_InitStructure;
char rx_buff[],rx_buff_count=0;
void RCC_Configuration(void)
{
RCC_DeInit();
RCC_HSICmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);
RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI);
RCC_HSEConfig(RCC_HSE_OFF);
RCC_LSEConfig(RCC_LSE_OFF);
RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_9); // 72HMz
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
RCC_ADCCLKConfig(RCC_PCLK2_Div4);
RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div2);
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
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);
GPIO_ResetBits(GPIOD,GPIO_Pin_2);
}
void GPIO_INIT()
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_SetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);
}
void delay_us(u32 n)
{
u8 j;
while(n--)
for(j=0;j<10;j++);
}
void delay_ms(u32 n)
{
while(n--)
delay_us(1000);
}
void USART_int(long BaudRate)
{ USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* PA10 USART1_Rx */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* USARTx configured as follow:
- BaudRate = 115200 baud
- Word Length = 8 Bits
- One Stop Bit
- No parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit enabled
*/
USART_InitStructure.USART_BaudRate = BaudRate;//??????
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//???????8bit
USART_InitStructure.USART_StopBits = USART_StopBits_1;//????1
USART_InitStructure.USART_Parity = USART_Parity_No;//????
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//??????none
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//??????????
USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
USART_ClockInit(USART1, &USART_ClockInitStructure);
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_Cmd(USART1, ENABLE);
/* Configure four bit for preemption priority */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
/* Enable the USART1 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 15;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void USART_SendStr(char *str)
{
while((*str)!='\0')
{USART_SendData(USART1,*str++);
while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
}
}
char strcmp(char *S,char *C,char LEN)
{ char count;
for(count=0;count<LEN;count++)
{
if(S[count]!=C[count])
{return 0;}
}
return 1;
}
void commcmp(char *S,char LEN)
{
int i,j;
unsigned char flag=0;
if((LEN!=6)&(LEN!=7)&(LEN!=8)&(LEN!=9))
{USART_SendStr("\r\n Erro input!!!\r\n");}
else{
switch(LEN)
{
case 6:
{
flag = strcmp(S,"time=5",6);
if(flag==1)
{
USART_SendStr("\r\n I \r\n");
for(i=0;i<=18;i++)
{
GPIO_SetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);
i=0x01;
GPIO_ResetBits(GPIOC,i);
delay_ms(5);
GPIO_SetBits(GPIOC,i);
for(j=1;j<=3;j++)
{
i<<=1;
GPIO_ResetBits(GPIOC,i);
delay_ms(5);
GPIO_SetBits(GPIOC,i);
}
i=0x0100;
for(j=1;j<=4;j++)
{
i>>=1;
GPIO_ResetBits(GPIOC,i);
delay_ms(5);
GPIO_SetBits(GPIOC,i);
}
}
}
}
case 7:
{
flag = strcmp(S,"time=20",7);
if(flag==1)
{
USART_SendStr("\r\n love you \r\n");
for(i=0;i<=18;i++)
{
i=0x0010;
for(j=1;j<=4;j++)
{
i>>=1;
GPIO_ResetBits(GPIOC,i);
delay_ms(100);
GPIO_SetBits(GPIOC,i);
}
i=0x08;
for(j=1;j<=4;j++)
{
i<<=1;
GPIO_ResetBits(GPIOC,i);
delay_ms(100);
GPIO_SetBits(GPIOC,i);
}
}
}
}
case 8:
{
flag = strcmp(S,"time=520",8);
if(flag==1)
{
USART_SendStr("\r\n I love you \r\n");
for(i=0;i<=18;i++)
{
GPIO_SetBits(GPIOC,0x000000ff);
i=0x00100;
for(j=1;j<=8;j++)
{
i>>=1;
GPIO_ResetBits(GPIOC,i);
delay_ms(520);
GPIO_SetBits(GPIOC,i);
}
}
break;
}
}
case 9:
{
flag = strcmp(S,"time=1111",9);
if(flag==1)
{
USART_SendStr("\r\n Singles Day I love you \r\n");
for(i=0;i<=18;i++)
{
GPIO_SetBits(GPIOC,0x000000ff);
i=0x00100;
for(j=1;j<=8;j++)
{
i>>=1;
GPIO_ResetBits(GPIOC,i);
delay_ms(1111);
GPIO_SetBits(GPIOC,i);
}
}
break;
}
}
}
}
}
void input_ASK()
{
char j;
commcmp(rx_buff,rx_buff_count);
rx_buff_count=0;
for (j=0;j<rx_buff_count;j++)
{rx_buff[j]='\0';}
USART_SendStr("\n>");
}
int main(void)
{
RCC_Configuration();
GPIO_INIT();
USART_int(9600);
USART_SendStr("SyStem booting......\r\n");
while(1){}
}
void USART1_IRQHandler(void)
{
while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET)
{
}
if(USART_ReceiveData(USART1)==0x0d)
{input_ASK();}
else
{
USART_SendData(USART1,USART_ReceiveData(USART1));
rx_buff[rx_buff_count]= USART_ReceiveData(USART1);
rx_buff_count++;
}
USART_ClearFlag(USART1, USART_FLAG_RXNE);
}
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