570 lines
20 KiB
C
570 lines
20 KiB
C
#include "sys.h"
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#include "usart.h"
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//////////////////////////////////////////////////////////////////////////////////
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//如果使用ucos,则包括下面的头文件即可.
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#if SYSTEM_SUPPORT_OS
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#include "includes.h" //ucos 使用
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#endif
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//////////////////////////////////////////////////////////////////////////////////
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//本程序只供学习使用，未经作者许可，不得用于其它任何用途
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//ALIENTEK STM32F4探索者开发板
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//串口1初始化
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//正点原子@ALIENTEK
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//技术论坛:www.openedv.com
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//修改日期:2014/6/10
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//版本：V1.5
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//版权所有，盗版必究。
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//Copyright(C) 广州市星翼电子科技有限公司 2009-2019
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//All rights reserved
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//********************************************************************************
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//V1.3修改说明
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//支持适应不同频率下的串口波特率设置.
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//加入了对printf的支持
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//增加了串口接收命令功能.
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//修正了printf第一个字符丢失的bug
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//V1.4修改说明
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//1,修改串口初始化IO的bug
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//2,修改了USART_RX_STA,使得串口最大接收字节数为2的14次方
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//3,增加了USART_REC_LEN,用于定义串口最大允许接收的字节数(不大于2的14次方)
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//4,修改了EN_USART1_RX的使能方式
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//V1.5修改说明
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//1,增加了对UCOSII的支持
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//////////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////
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//加入以下代码,支持printf函数,而不需要选择use MicroLIB
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#if 1
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#pragma import(__use_no_semihosting)
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//标准库需要的支持函数
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struct __FILE
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{
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int handle;
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};
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FILE __stdout;
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//定义_sys_exit()以避免使用半主机模式
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void _sys_exit(int x)
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{
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x = x;
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}
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//重定义fputc函数
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int fputc(int ch, FILE *f)
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{
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while((UART4->SR&0X40)==0);//循环发送,直到发送完毕
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UART4->DR = (u8) ch;
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return ch;
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}
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#endif
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//串口1中断服务程序
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//注意,读取USARTx->SR能避免莫名其妙的错误
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u8 USART_RX_BUF[USART_REC_LEN]; //接收缓冲,最大USART_REC_LEN个字节.
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//接收状态
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//bit15， 接收完成标志
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//bit14， 接收到0x0d
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//bit13~0， 接收到的有效字节数目
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u16 USART_RX_STA=0; //接收状态标记
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/* 接收缓冲, 最大USART_REC_LEN个字节. */
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uint8_t g_usart1_rx_buf[USART_REC_LEN];
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uint16_t g_usart1_rx_sta = 0;
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uint16_t g_usart1_rx_state = 0;
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uint16_t g_usart2_rx_state = 0;
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uint16_t g_usart3_rx_state = 0;
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uint16_t g_usart4_rx_state = 0;
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uint16_t g_usart5_rx_state = 0;
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uint16_t g_usart6_rx_state = 0;
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uint8_t g_rx1_buffer[RXBUFFERSIZE]; /* HAL库使用的串口接收缓冲 */
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/* 接收缓冲, 最大USART_REC_LEN个字节. */
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uint8_t g_usart2_rx_buf[USART_REC_LEN];
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uint16_t g_usart2_rx_sta = 0;
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uint8_t g_rx2_buffer[RXBUFFERSIZE]; /* HAL库使用的串口接收缓冲 */
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/* 接收缓冲, 最大USART_REC_LEN个字节. */
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uint8_t g_usart3_rx_buf[USART_REC_LEN];
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uint16_t g_usart3_rx_sta = 0;
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uint8_t g_rx3_buffer[RXBUFFERSIZE]; /* HAL库使用的串口接收缓冲 */
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/* 接收缓冲, 最大USART_REC_LEN个字节. */
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uint8_t g_usart4_rx_buf[USART_REC_LEN];
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uint16_t g_usart4_rx_sta = 0;
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uint8_t g_rx4_buffer[RXBUFFERSIZE]; /* HAL库使用的串口接收缓冲 */
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/* 接收缓冲, 最大USART_REC_LEN个字节. */
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uint8_t g_usart5_rx_buf[USART_REC_LEN];
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uint16_t g_usart5_rx_sta = 0;
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uint8_t g_rx5_buffer[RXBUFFERSIZE]; /* HAL库使用的串口接收缓冲 */
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/* 接收缓冲, 最大USART_REC_LEN个字节. */
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uint8_t g_usart6_rx_buf[USART_REC_LEN];
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uint16_t g_usart6_rx_sta = 0;
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uint8_t g_rx6_buffer[RXBUFFERSIZE]; /* HAL库使用的串口接收缓冲 */
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char receive_buffer1[RXBUFFERSIZE]={0};
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char receive_buffer2[RXBUFFERSIZE]={0};
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char receive_buffer3[RXBUFFERSIZE]={0};
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//初始化IO 串口1
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//bound:波特率
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void uart1_init(u32 bound){
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//GPIO端口设置
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GPIO_InitTypeDef GPIO_InitStructure;
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USART_InitTypeDef USART_InitStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE); //使能GPIOA时钟
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);//使能USART1时钟
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//串口1对应引脚复用映射
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GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_USART1); //GPIOA9复用为USART1
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GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_USART1); //GPIOA10复用为USART1
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//USART1端口配置
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10; //GPIOA9与GPIOA10
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHz
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽复用输出
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉
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GPIO_Init(GPIOA,&GPIO_InitStructure); //初始化PA9，PA10
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//USART1 初始化设置
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USART_InitStructure.USART_BaudRate = bound;//波特率设置
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
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USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
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USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
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USART_Init(USART1, &USART_InitStructure); //初始化串口1
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USART_Cmd(USART1, ENABLE); //使能串口1
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//USART_ClearFlag(USART1, USART_FLAG_TC);
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USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启相关中断
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//Usart1 NVIC 配置
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NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;//串口1中断通道
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//抢占优先级3
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NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //子优先级3
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
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NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器、
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}
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void USART1_IRQHandler(void) //串口1中断服务程序
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{
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u8 uart1_data;
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if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //接收中断
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{
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USART_ClearITPendingBit(USART1, USART_IT_RXNE);
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uart1_data =USART_ReceiveData(USART1); //读取接收到的数据
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g_rx1_buffer[0] = uart1_data;
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//USART_ClearITPendingBit(USART1, USART_IT_RXNE);
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if ( g_usart1_rx_sta == 0 && g_rx1_buffer[0] == 0xBB )
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{
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g_usart1_rx_buf[0] = g_rx1_buffer[0];
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g_usart1_rx_sta = 1;
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}
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else if( g_usart1_rx_sta != 0 )
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{
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g_usart1_rx_buf[g_usart1_rx_sta & 0X3FFF] = g_rx1_buffer[0];
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g_usart1_rx_sta++;
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if(g_usart1_rx_sta > (USART_REC_LEN - 1))
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{
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g_usart1_rx_sta = 0;
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g_usart1_rx_state = 1;
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// memset(g_usart1_rx_buf, 0x0, 6);
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// g_rx1_buffer[0] = 0x0;
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}
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}
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}
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else if(USART_GetITStatus(USART1, USART_IT_TXE) != RESET)
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{
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USART_ClearITPendingBit(USART1, USART_IT_TXE);
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}
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}
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void uart2_init(u32 bound){
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//GPIO端口设置
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GPIO_InitTypeDef GPIO_InitStructure;
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USART_InitTypeDef USART_InitStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE); //使能GPIOA时钟
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RCC_APB2PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);//使能USART1时钟
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//串口1对应引脚复用映射
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GPIO_PinAFConfig(GPIOA,GPIO_PinSource2,GPIO_AF_USART2); //GPIOA9复用为USART1
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GPIO_PinAFConfig(GPIOA,GPIO_PinSource3,GPIO_AF_USART2); //GPIOA10复用为USART1
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//USART1端口配置
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3; //GPIOA9与GPIOA10
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHz
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽复用输出
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉
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GPIO_Init(GPIOA,&GPIO_InitStructure); //初始化PA9，PA10
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//USART1 初始化设置
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USART_InitStructure.USART_BaudRate = bound;//波特率设置
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
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USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
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USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
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USART_Init(USART2, &USART_InitStructure); //初始化串口1
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USART_Cmd(USART2, ENABLE); //使能串口1
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//USART_ClearFlag(USART1, USART_FLAG_TC);
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USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//开启相关中断
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//Usart1 NVIC 配置
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NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;//串口1中断通道
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//抢占优先级3
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NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //子优先级3
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
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NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器、
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}
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void USART2_IRQHandler(void) //串口1中断服务程序
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{
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u8 uart1_data;
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if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) //接收中断
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{
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USART_ClearITPendingBit(USART2, USART_IT_RXNE);
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uart1_data =USART_ReceiveData(USART2); //读取接收到的数据
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g_rx2_buffer[0] = uart1_data;
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//USART_ClearITPendingBit(USART1, USART_IT_RXNE);
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if ( g_usart2_rx_sta == 0 && g_rx2_buffer[0] == 0xBB )
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{
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g_usart2_rx_buf[0] = g_rx2_buffer[0];
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g_usart2_rx_sta = 1;
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}
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else if( g_usart2_rx_sta != 0 )
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{
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g_usart2_rx_buf[g_usart2_rx_sta & 0X3FFF] = g_rx2_buffer[0];
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g_usart2_rx_sta++;
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if(g_usart2_rx_sta > (USART_REC_LEN - 1))
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{
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g_usart2_rx_sta = 0;
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g_usart2_rx_state = 1;
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// memset(g_usart1_rx_buf, 0x0, 6);
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// g_rx1_buffer[0] = 0x0;
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}
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}
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}
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else if(USART_GetITStatus(USART2, USART_IT_TXE) != RESET)
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{
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USART_ClearITPendingBit(USART2, USART_IT_TXE);
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}
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}
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void uart3_init(u32 bound){
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//GPIO端口设置
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GPIO_InitTypeDef GPIO_InitStructure;
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USART_InitTypeDef USART_InitStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD,ENABLE); //使能GPIOA时钟
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RCC_APB2PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);//使能USART1时钟
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//串口1对应引脚复用映射
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GPIO_PinAFConfig(GPIOA,GPIO_PinSource8,GPIO_AF_USART3); //GPIOA9复用为USART1
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GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_USART3); //GPIOA10复用为USART1
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//USART1端口配置
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10; //GPIOA9与GPIOA10
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHz
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽复用输出
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉
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GPIO_Init(GPIOD,&GPIO_InitStructure); //初始化PA9，PA10
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//USART1 初始化设置
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USART_InitStructure.USART_BaudRate = bound;//波特率设置
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
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USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
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USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
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USART_Init(USART3, &USART_InitStructure); //初始化串口1
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USART_Cmd(USART3, ENABLE); //使能串口1
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//USART_ClearFlag(USART1, USART_FLAG_TC);
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USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);//开启相关中断
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//Usart1 NVIC 配置
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NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;//串口1中断通道
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//抢占优先级3
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NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //子优先级3
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
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NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器、
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}
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void USART3_IRQHandler(void) //串口1中断服务程序
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{
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u8 uart1_data;
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if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET) //接收中断
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{
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USART_ClearITPendingBit(USART3, USART_IT_RXNE);
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uart1_data =USART_ReceiveData(USART3); //读取接收到的数据
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g_rx3_buffer[0] = uart1_data;
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//USART_ClearITPendingBit(USART1, USART_IT_RXNE);
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if ( g_usart3_rx_sta == 0 && g_rx3_buffer[0] == 0xBB )
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{
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g_usart3_rx_buf[0] = g_rx3_buffer[0];
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g_usart3_rx_sta = 1;
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}
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else if( g_usart3_rx_sta != 0 )
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{
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g_usart3_rx_buf[g_usart3_rx_sta & 0X3FFF] = g_rx3_buffer[0];
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g_usart3_rx_sta++;
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if(g_usart3_rx_sta > (USART_REC_LEN - 1))
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{
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g_usart3_rx_sta = 0;
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g_usart3_rx_state = 1;
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// memset(g_usart1_rx_buf, 0x0, 6);
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// g_rx1_buffer[0] = 0x0;
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}
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}
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}
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else if(USART_GetITStatus(USART3, USART_IT_TXE) != RESET)
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{
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USART_ClearITPendingBit(USART3, USART_IT_TXE);
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}
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}
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void uart4_init(u32 bound){
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//GPIO端口设置
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GPIO_InitTypeDef GPIO_InitStructure;
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USART_InitTypeDef USART_InitStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE); //使能GPIOA时钟
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RCC_APB2PeriphClockCmd(RCC_APB1Periph_UART4,ENABLE);//使能USART1时钟
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//串口1对应引脚复用映射
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GPIO_PinAFConfig(GPIOA,GPIO_PinSource0,GPIO_AF_USART1); //GPIOA9复用为USART1
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GPIO_PinAFConfig(GPIOA,GPIO_PinSource1,GPIO_AF_USART1); //GPIOA10复用为USART1
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//USART1端口配置
|
||
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1; //GPIOA9与GPIOA10
|
||
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能
|
||
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHz
|
||
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽复用输出
|
||
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉
|
||
GPIO_Init(GPIOA,&GPIO_InitStructure); //初始化PA9，PA10
|
||
|
||
//USART1 初始化设置
|
||
USART_InitStructure.USART_BaudRate = bound;//波特率设置
|
||
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
|
||
USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
|
||
USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
|
||
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
|
||
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
|
||
USART_Init(UART4, &USART_InitStructure); //初始化串口1
|
||
|
||
USART_Cmd(UART4, ENABLE); //使能串口1
|
||
|
||
//USART_ClearFlag(USART1, USART_FLAG_TC);
|
||
|
||
|
||
USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);//开启相关中断
|
||
|
||
//Usart1 NVIC 配置
|
||
NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn;//串口1中断通道
|
||
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//抢占优先级3
|
||
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //子优先级3
|
||
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
|
||
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器、
|
||
|
||
}
|
||
|
||
|
||
void UART4_IRQHandler(void) //串口1中断服务程序
|
||
{
|
||
u8 Res;
|
||
}
|
||
|
||
|
||
void uart5_init(u32 bound){
|
||
//GPIO端口设置
|
||
GPIO_InitTypeDef GPIO_InitStructure;
|
||
USART_InitTypeDef USART_InitStructure;
|
||
NVIC_InitTypeDef NVIC_InitStructure;
|
||
|
||
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC,ENABLE); //使能GPIOA时钟
|
||
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD,ENABLE); //使能GPIOA时钟
|
||
|
||
RCC_APB2PeriphClockCmd(RCC_APB1Periph_UART5,ENABLE);//使能USART1时钟
|
||
|
||
//串口1对应引脚复用映射
|
||
GPIO_PinAFConfig(GPIOC,GPIO_PinSource12,GPIO_AF_UART5); //GPIOA9复用为USART1
|
||
GPIO_PinAFConfig(GPIOD,GPIO_PinSource2,GPIO_AF_UART5); //GPIOA10复用为USART1
|
||
|
||
//USART1端口配置
|
||
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 ; //GPIOA9与GPIOA10
|
||
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能
|
||
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHz
|
||
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽复用输出
|
||
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉
|
||
GPIO_Init(GPIOC,&GPIO_InitStructure); //初始化PA9，PA10
|
||
|
||
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 ; //GPIOA9与GPIOA10
|
||
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能
|
||
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHz
|
||
//GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽复用输出
|
||
//GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉
|
||
GPIO_Init(GPIOD,&GPIO_InitStructure); //初始化PA9，PA10
|
||
|
||
|
||
//USART1 初始化设置
|
||
USART_InitStructure.USART_BaudRate = bound;//波特率设置
|
||
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
|
||
USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
|
||
USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
|
||
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
|
||
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
|
||
USART_Init(UART5, &USART_InitStructure); //初始化串口1
|
||
|
||
USART_Cmd(UART5, ENABLE); //使能串口1
|
||
|
||
//USART_ClearFlag(USART1, USART_FLAG_TC);
|
||
|
||
|
||
USART_ITConfig(UART5, USART_IT_RXNE, ENABLE);//开启相关中断
|
||
|
||
//Usart1 NVIC 配置
|
||
NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQn;//串口1中断通道
|
||
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//抢占优先级3
|
||
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //子优先级3
|
||
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
|
||
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器、
|
||
|
||
}
|
||
|
||
|
||
void UART5_IRQHandler(void) //串口1中断服务程序
|
||
{
|
||
u8 Res;
|
||
}
|
||
|
||
|
||
void uart6_init(u32 bound){
|
||
//GPIO端口设置
|
||
GPIO_InitTypeDef GPIO_InitStructure;
|
||
USART_InitTypeDef USART_InitStructure;
|
||
NVIC_InitTypeDef NVIC_InitStructure;
|
||
|
||
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC,ENABLE); //使能GPIOA时钟
|
||
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART6,ENABLE);//使能USART1时钟
|
||
|
||
//串口1对应引脚复用映射
|
||
GPIO_PinAFConfig(GPIOC,GPIO_PinSource6,GPIO_AF_USART1); //GPIOA9复用为USART1
|
||
GPIO_PinAFConfig(GPIOC,GPIO_PinSource7,GPIO_AF_USART1); //GPIOA10复用为USART1
|
||
|
||
//USART1端口配置
|
||
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7; //GPIOA9与GPIOA10
|
||
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能
|
||
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHz
|
||
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽复用输出
|
||
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉
|
||
GPIO_Init(GPIOC,&GPIO_InitStructure); //初始化PA9，PA10
|
||
|
||
//USART1 初始化设置
|
||
USART_InitStructure.USART_BaudRate = bound;//波特率设置
|
||
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
|
||
USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
|
||
USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
|
||
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
|
||
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
|
||
USART_Init(USART6, &USART_InitStructure); //初始化串口1
|
||
|
||
USART_Cmd(USART6, ENABLE); //使能串口1
|
||
|
||
//USART_ClearFlag(USART1, USART_FLAG_TC);
|
||
|
||
|
||
USART_ITConfig(USART6, USART_IT_RXNE, ENABLE);//开启相关中断
|
||
|
||
//Usart1 NVIC 配置
|
||
NVIC_InitStructure.NVIC_IRQChannel = USART6_IRQn;//串口1中断通道
|
||
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//抢占优先级3
|
||
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //子优先级3
|
||
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
|
||
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器、
|
||
|
||
}
|
||
|
||
|
||
void USART6_IRQHandler(void) //串口1中断服务程序
|
||
{
|
||
u8 uart1_data;
|
||
if(USART_GetITStatus(USART6, USART_IT_RXNE) != RESET) //接收中断
|
||
{
|
||
USART_ClearITPendingBit(USART6, USART_IT_RXNE);
|
||
uart1_data =USART_ReceiveData(USART6); //读取接收到的数据
|
||
g_rx6_buffer[0] = uart1_data;
|
||
//USART_ClearITPendingBit(USART1, USART_IT_RXNE);
|
||
if ( g_usart2_rx_sta == 0 && g_rx6_buffer[0] == 0xBB )
|
||
{
|
||
g_usart6_rx_buf[0] = g_rx6_buffer[0];
|
||
g_usart6_rx_sta = 1;
|
||
}
|
||
else if( g_usart6_rx_sta != 0 )
|
||
{
|
||
g_usart6_rx_buf[g_usart6_rx_sta & 0X3FFF] = g_rx6_buffer[0];
|
||
g_usart6_rx_sta++;
|
||
if(g_usart6_rx_sta > (USART_REC_LEN - 1))
|
||
{
|
||
g_usart6_rx_sta = 0;
|
||
g_usart6_rx_state = 1;
|
||
// memset(g_usart1_rx_buf, 0x0, 6);
|
||
// g_rx1_buffer[0] = 0x0;
|
||
}
|
||
}
|
||
|
||
}
|
||
else if(USART_GetITStatus(USART6, USART_IT_TXE) != RESET)
|
||
{
|
||
USART_ClearITPendingBit(USART6, USART_IT_TXE);
|
||
}
|
||
}
|
||
|
||
|
||
|
||
|