各位，我在寫一個(gè)串口通信的程序，代碼寫的比較長之后，發(fā)現(xiàn)串口收發(fā)變的不正常了
開始表現(xiàn)為，發(fā)指令后，接收數(shù)據(jù)延后，接著寫功能代碼，到最后發(fā)現(xiàn)，發(fā)指令后都收不到數(shù)據(jù)了，連按多次，只有一次能收到
后來測試了一下，串口收發(fā)，發(fā)現(xiàn)代碼中加入延時(shí)后，串口數(shù)據(jù)返回也會(huì)延時(shí)，難道延時(shí)會(huì)影響到中斷。。。。。
請大神給看看。。 代碼如下
main.c
- /*------------------------------------------------------------------*/
/* --- STC MCU International Limited -------------------------------*/
/* --- STC 1T Series MCU RC Demo -----------------------------------*/
/* --- Mobile: (86)13922805190 -------------------------------------*/
/* --- Fax: 86-0513-55012956,55012947,55012969 ---------------------*/
/* --- Tel: 86-0513-55012928,55012929,55012966 ---------------------*/
/* --- Web: www.GXWMCU.com -----------------------------------------*/
/* --- QQ: 800003751 ----------------------------------------------*/
/* If you want to use the program or the program referenced in the */
/* article, please specify in which data and procedures from STC */
/*------------------------------------------------------------------*/
#include "config.h"
#include "USART1.h"
#include "delay.h"
/************* 功能說明 **************
雙串口全雙工中斷方式收發(fā)通訊程序。
通過PC向MCU發(fā)送數(shù)據(jù), MCU收到后通過串口把收到的數(shù)據(jù)原樣返回.
******************************************/
/************* 本地常量聲明 **************/
/************* 本地變量聲明 **************/
/************* 本地函數(shù)聲明 **************/
/************* 外部函數(shù)和變量聲明 *****************/
/************* 串口1初始化函數(shù) *****************/
void UART_config(void)
{
COMx_InitDefine COMx_InitStructure; //結(jié)構(gòu)定義
COMx_InitStructure.UART_Mode = UART_8bit_BRTx; //模式, UART_ShiftRight,UART_8bit_BRTx,UART_9bit,UART_9bit_BRTx
COMx_InitStructure.UART_BRT_Use = BRT_Timer2; //使用波特率, BRT_Timer1, BRT_Timer2 (注意: 串口2固定使用BRT_Timer2)
COMx_InitStructure.UART_BaudRate = 115200ul; //波特率, 一般 110 ~ 115200
COMx_InitStructure.UART_RxEnable = ENABLE; //接收允許, ENABLE或DISABLE
COMx_InitStructure.BaudRateDouble = DISABLE; //波特率加倍, ENABLE或DISABLE
COMx_InitStructure.UART_Interrupt = ENABLE; //中斷允許, ENABLE或DISABLE
COMx_InitStructure.UART_Polity = PolityHigh; //中斷優(yōu)先級, PolityLow,PolityHigh
COMx_InitStructure.UART_P_SW = UART1_SW_P30_P31; //切換端口, UART1_SW_P30_P31,UART1_SW_P36_P37,UART1_SW_P16_P17(必須使用內(nèi)部時(shí)鐘)
COMx_InitStructure.UART_RXD_TXD_Short = DISABLE; //內(nèi)部短路RXD與TXD, 做中繼, ENABLE,DISABLE
USART_Configuration(USART1, &COMx_InitStructure); //初始化串口1 USART1,USART2
PrintString1("STC15F2K60S2 UART1 Test Prgramme!\r\n"); //SUART1發(fā)送一個(gè)字符串
}
/**********************************************/
void main(void)
{
u8 i;
UART_config();
EA = 1;
while (1)
{
delay_ms(1);
Delay200ms(); Delay200ms();Delay200ms();Delay200ms();Delay200ms();
if(COM1.RX_TimeOut > 0) //超時(shí)計(jì)數(shù)
{
if(--COM1.RX_TimeOut == 0)
{
if(COM1.RX_Cnt > 0)
{
for(i=0; i<COM1.RX_Cnt; i++) TX1_write2buff(RX1_Buffer[i]); //收到的數(shù)據(jù)原樣返回
}
COM1.RX_Cnt = 0;
}
}
}
}
- /*------------------------------------------------------------------*/
/* --- STC MCU International Limited -------------------------------*/
/* --- STC 1T Series MCU RC Demo -----------------------------------*/
/* --- Mobile: (86)13922805190 -------------------------------------*/
/* --- Fax: 86-0513-55012956,55012947,55012969 ---------------------*/
/* --- Tel: 86-0513-55012928,55012929,55012966 ---------------------*/
/* --- Web: www.GXWMCU.com -----------------------------------------*/
/* --- QQ: 800003751 ----------------------------------------------*/
/* If you want to use the program or the program referenced in the */
/* article, please specify in which data and procedures from STC */
/*------------------------------------------------------------------*/
#include "USART1.h"
COMx_Define COM1;
u8 idata TX1_Buffer[COM_TX1_Lenth]; //發(fā)送緩沖
u8 idata RX1_Buffer[COM_RX1_Lenth]; //接收緩沖
u8 USART_Configuration(u8 UARTx, COMx_InitDefine *COMx)
{
u8 i;
u32 j;
if(UARTx == USART1)
{
COM1.id = 1;
COM1.TX_read = 0;
COM1.TX_write = 0;
COM1.B_TX_busy = 0;
COM1.RX_Cnt = 0;
COM1.RX_TimeOut = 0;
COM1.B_RX_OK = 0;
for(i=0; i<COM_TX1_Lenth; i++) TX1_Buffer[i] = 0;
for(i=0; i<COM_RX1_Lenth; i++) RX1_Buffer[i] = 0;
if(COMx->UART_Mode > UART_9bit_BRTx) return 1; //模式錯(cuò)誤
if(COMx->UART_Polity == PolityHigh) PS = 1; //高優(yōu)先級中斷
else PS = 0; //低優(yōu)先級中斷
SCON = (SCON & 0x3f) | COMx->UART_Mode;
if((COMx->UART_Mode == UART_9bit_BRTx) ||(COMx->UART_Mode == UART_8bit_BRTx)) //可變波特率
{
j = (MAIN_Fosc / 4) / COMx->UART_BaudRate; //按1T計(jì)算
if(j >= 65536UL) return 2; //錯(cuò)誤
j = 65536UL - j;
if(COMx->UART_BRT_Use == BRT_Timer1)
{
TR1 = 0;
AUXR &= ~0x01; //S1 BRT Use Timer1;
TMOD &= ~(1<<6); //Timer1 set As Timer
TMOD &= ~0x30; //Timer1_16bitAutoReload;
AUXR |= (1<<6); //Timer1 set as 1T mode
TH1 = (u8)(j>>8);
TL1 = (u8)j;
ET1 = 0; //禁止中斷
TMOD &= ~0x40; //定時(shí)
INT_CLKO &= ~0x02; //不輸出時(shí)鐘
TR1 = 1;
}
else if(COMx->UART_BRT_Use == BRT_Timer2)
{
AUXR &= ~(1<<4); //Timer stop
AUXR |= 0x01; //S1 BRT Use Timer2;
AUXR &= ~(1<<3); //Timer2 set As Timer
AUXR |= (1<<2); //Timer2 set as 1T mode
TH2 = (u8)(j>>8);
TL2 = (u8)j;
IE2 &= ~(1<<2); //禁止中斷
AUXR &= ~(1<<3); //定時(shí)
AUXR |= (1<<4); //Timer run enable
}
else return 2; //錯(cuò)誤
}
else if(COMx->UART_Mode == UART_ShiftRight)
{
if(COMx->BaudRateDouble == ENABLE) AUXR |= (1<<5); //固定波特率SysClk/2
else AUXR &= ~(1<<5); //固定波特率SysClk/12
}
else if(COMx->UART_Mode == UART_9bit) //固定波特率SysClk*2^SMOD/64
{
if(COMx->BaudRateDouble == ENABLE) PCON |= (1<<7); //固定波特率SysClk/32
else PCON &= ~(1<<7); //固定波特率SysClk/64
}
if(COMx->UART_Interrupt == ENABLE) ES = 1; //允許中斷
else ES = 0; //禁止中斷
if(COMx->UART_RxEnable == ENABLE) REN = 1; //允許接收
else REN = 0; //禁止接收
P_SW1 = (P_SW1 & 0x3f) | (COMx->UART_P_SW & 0xc0); //切換IO
if(COMx->UART_RXD_TXD_Short == ENABLE) PCON2 |= (1<<4); //內(nèi)部短路RXD與TXD, 做中繼, ENABLE,DISABLE
else PCON2 &= ~(1<<4);
return 0;
}
return 3; //其它錯(cuò)誤
}
/*************** 裝載串口發(fā)送緩沖 *******************************/
void TX1_write2buff(u8 dat) //寫入發(fā)送緩沖，指針+1
{
TX1_Buffer[COM1.TX_write] = dat; //裝發(fā)送緩沖
if(++COM1.TX_write >= COM_TX1_Lenth) COM1.TX_write = 0;
if(COM1.B_TX_busy == 0) //空閑
{
COM1.B_TX_busy = 1; //標(biāo)志忙
TI = 1; //觸發(fā)發(fā)送中斷
}
}
void PrintString1(u8 *puts)
{
for (; *puts != 0; puts++) TX1_write2buff(*puts); //遇到停止符0結(jié)束
}
/********************* UART1中斷函數(shù)************************/
void UART1_int (void) interrupt UART1_VECTOR
{
if(RI)
{
RI = 0;
if(COM1.B_RX_OK == 0)
{
if(COM1.RX_Cnt >= COM_RX1_Lenth) COM1.RX_Cnt = 0;
RX1_Buffer[COM1.RX_Cnt++] = SBUF;
COM1.RX_TimeOut = TimeOutSet1;
}
}
if(TI)
{
TI = 0;
if(COM1.TX_read != COM1.TX_write)
{
SBUF = TX1_Buffer[COM1.TX_read];
if(++COM1.TX_read >= COM_TX1_Lenth) COM1.TX_read = 0;
}
else COM1.B_TX_busy = 0;
}
}
delay.c
- #include "delay.h"
//========================================================================
// 函數(shù): void delay_ms(unsigned char ms)
// 描述: 延時(shí)函數(shù)。
// 參數(shù): ms,要延時(shí)的ms數(shù), 這里只支持1~255ms. 自動(dòng)適應(yīng)主時(shí)鐘.
// 返回: none.
// 版本: VER1.0
// 日期: 2013-4-1
// 備注:
//========================================================================
void delay_ms(unsigned char ms)
{
unsigned int i;
do{
i = MAIN_Fosc / 13000;
while(--i) ; //14T per loop
}while(--ms);
}
void Delay200ms() //@22.1184MHz
{
unsigned char i, j, k;
_nop_();
_nop_();
i = 17;
j = 208;
k = 27;
do
{
do
{
while (--k);
} while (--j);
} while (--i);
}
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