195 lines
4.3 KiB
C
195 lines
4.3 KiB
C
/*
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* UART1.c
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*
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* Created on: 2022年03月12日
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* Author: User
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*/
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/* Includes ------------------------------------------------------------------*/
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#include <Main.h>
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//#include <Timer0.h>
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/* Private define-------------------------------------------------------------*/
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#define UART1_Send_LENGTH 10
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#define UART1_Rec_LENGTH 10
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/* Private variables----------------------------------------------------------*/
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static uint8_t xdata ucSend_Buffer[UART1_Send_LENGTH] = {0x00};
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static uint8_t xdata ucRec_Buffer[UART1_Rec_LENGTH] = {0x00};
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/* Private function prototypes------------------------------------------------*/
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static void Init(void); //串口初始化
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static void SendData(uint8_t); //串口发送字符
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static void SendArray(uint8_t *, uint16_t); //串口发送数组
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static void SendString(uint8_t *); //串口发送字符串
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static void Protocol_Analy(void); //串口协议
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/* Public variables-----------------------------------------------------------*/
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UART_t idata UART1 =
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{
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FALSE,
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FALSE,
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0,
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ucSend_Buffer,
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ucRec_Buffer,
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Init,
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SendData,
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SendArray,
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SendString,
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Protocol_Analy};
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/*
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* @name Init
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* @brief 串口1初始化
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* @param None
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* @retval None
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*/
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static void Init() // 9600bps@16MHz
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{
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// P2M0 = P2M0 & 0xF0 | 0x20; // P20设置为上拉输入
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// P0M2 = P0M2 & 0x0F | 0x80; // P05设置为推挽输出
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TXD_MAP = 0x05; // TXD映射P05
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RXD_MAP = 0x20; // RXD映射P20
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BRTSEL = 0X00; // UART1的波特率:00 T4
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T4CON = 0x06; // T4工作模式：UART1波特率发生器
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//波特率计算
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//波特率 = 1/16 * (T4时钟源频率 / 定时器4预分频比) / (65536 - 0xFF98)
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// = 1/16 * ((16000000 / 1) / 104)
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// = 9615.38(误差0.16%)
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//波特率9600
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//反推初值 = (65536 - ((T4时钟源频率 / 定时器4预分频比) * (1 / 16)) / 波特率)
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// = (65536 - (16000000 * (1 / 16) / 9600))
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// = (65536 - 104.167)
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// = FF98
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TH4 = 0xFF;
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TL4 = 0x98; //波特率9600
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SCON2 = 0x02; // 8位UART，波特率可变
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SCON = 0x10; //允许串行接收
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IE |= 0X10; //使能串口中断
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EA = 1; //使能总中断
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}
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/*
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* @name SendData
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* @brief 发送字符
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* @param dat:待发送字符
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* @retval None
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*/
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static void SendData(uint8_t dat)
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{
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while (UART1.ucTX_Busy_Flag)
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; //等待前面的数据发送完
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UART1.ucTX_Busy_Flag = TRUE; //置位忙碌标志
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SBUF = dat; //写数据至UART寄存器
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}
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/*
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* @name SendArray
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* @brief 串口发送数组
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* @param p_Arr:数组首地址，LEN:发送长度
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* @retval None
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*/
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static void SendArray(uint8_t *p_Arr, uint16_t LEN)
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{
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uint16_t i = 0;
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for (i = 0; i < LEN; i++)
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{
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UART1.UART_SendData(*(p_Arr + i));
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}
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while (UART1.ucTX_Busy_Flag)
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; //等待数据发送完
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}
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/*
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* @name SendString
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* @brief 发送字符串
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* @param p_Str:待发送字符串
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* @retval None
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// */
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static void SendString(uint8_t *p_Str)
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{
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while (*p_Str)
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{
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UART1.UART_SendData(*(p_Str++)); //发送当前字符
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}
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while (UART1.ucTX_Busy_Flag)
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; //等待数据发送完
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}
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// putchar字符发送函数重定向
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// extern char putchar(char c)
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// {
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// UART1.UART_SendData((uint8_t)c);
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// return c;
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// }
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/*
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* @name UART1_isr
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* @brief 串口1中断服务函数
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* @param None
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* @retval None
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*/
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void UART1_isr() interrupt UART1_VECTOR
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{
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if (RI)
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{
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RI = (bit)0; //清除接收中断标志
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if (UART1.ucRec_Cnt < UART1_Rec_LENGTH)
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{
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ucRec_Buffer[UART1.ucRec_Cnt++] = SBUF;
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}
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UART1.ucRec_Flag = TRUE;
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}
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if (TI)
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{
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TI = (bit)0; //清除发送中断标志
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UART1.ucTX_Busy_Flag = FALSE; //清忙碌标志
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}
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}
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/*
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* @name Protocol_Analy
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* @brief 串口协议
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* @param None
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* @retval None
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*/
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static void Protocol_Analy(void)
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{
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if (UART1.ucRec_Flag == TRUE)
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{
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//过滤无用的数据
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if (ucRec_Buffer[0] != 0)
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{
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Timer0.msDelay_Timer = 0;
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while (UART1.ucRec_Cnt < Protocol_Len)
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{
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if (Timer0.msDelay_Timer >= TIMER0_100mS) // 100ms没有接收完 跳出循环
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break;
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}
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// 协议解析
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Protocol.Analysis(&UART1); //串口协议处理
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}
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//清除缓存
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Public.Memory_Clr(ucRec_Buffer, (uint16_t)UART1.ucRec_Cnt);
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//重新接收
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UART1.ucRec_Cnt = 0; //接收计数清零
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UART1.ucRec_Flag = FALSE; //接收标志位取消
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}
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}
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/********************************************************
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End Of File
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********************************************************/ |