PIC与485的通讯源程序
#include "HardwareProfile.h"
//Configure bits
__CONFIG( HS & WDTDIS & PWRTDIS & BORDIS & LVPDIS );
void Board_Init(void);
#if defined(PIC_USE_HC595)
bit b_Reflash;
#endif
#if defined(PIC_USE_KB)
#define Free 1
#define Press 0
bit b_KeyActive;
bit b_KeyPress;
bit b_KeyState;
BYTE u_KeyValue;
BYTE u_SCANACC;
BYTE i_KeyValueBuffer[2];
#endif
BYTE u_10ms_Acc = 0;
BYTE u_50ms_Acc = 0;
BYTE u_100ms_Acc = 0;
BYTE u_200ms_Acc = 0;
WORD i_500ms_Acc = 0;
WORD i_1s_Acc = 0;
BYTE u_frame = 0;
WORD i_ADC;
void interrupt ISR(void)
{
if(T0IF)
{
T0IF = 0;
TMR0 = 0x0a; //定时1ms
u_10ms_Acc ++;
u_50ms_Acc ++;
u_100ms_Acc ++;
u_200ms_Acc ++;
i_500ms_Acc ++;
i_1s_Acc ++;
#if defined(PIC_USE_HC595)
b_Reflash = 1;
#endif
if(u_10ms_Acc >= 10)
{
u_10ms_Acc = 0;
//在下面增加自己的任务,每10ms执行一次
}
if(u_50ms_Acc >= 50)
{
u_50ms_Acc = 0;
//在下面增加自己的任务,每50ms执行一次
#if defined(PIC_USE_KB)
ADIF = 0;
ADGO = 1;
#endif
}
if(u_100ms_Acc >= 100)
{
u_100ms_Acc = 0;
//在下面增加自己的任务,每100ms执行一次
}
if(u_200ms_Acc >= 200)
{
u_200ms_Acc = 0;
//在下面增加自己的任务,每200ms执行一次
}
if(i_500ms_Acc >= 500)
{
i_500ms_Acc = 0;
//在下面增加自己的任务,每500ms执行一次
}
}
if(ADIF)
{
ADIF = 0;
#if defined(PIC_USE_KB)
if( ADRESH != 0 )
{
b_KeyPress = 1; //有按键被按下
i_ADC = ADRESH;
i_ADC = i_ADC << 8;
i_ADC = i_ADC | ADRESL;
i_ADC = i_ADC & 0xfff8l;
i_ADC = i_ADC >> 2;
}
else
{
b_KeyState = Free; //没按键被按下
b_KeyPress = 0;
LED_IO = 0x00;
}
#endif
if(TXIF && TXEN)
{
TXIF = 0;
}
}
}
void main()
{
Board_Init();
while(1)
{
#if defined(PIC_USE_HC595)
if(b_Reflash)
{
LED_Reflash();
b_Reflash = 0;
}
#endif
if(BUTTON1_IO == 0)
{
DisplayNumber_Process(8888);
}
if(BUTTON2_IO == 0)
{
DisplayNumber_Process(0);
}
#if defined(PIC_USE_RS485)
if(RCIF)
{
LED0_IO = LED0_IO ^ 1;
DisplayNumber_Process( RS485_RW() );
}
#endif
}
}
/////////////////////////////////////////////////////////////////
//Function void Board_Init(void)
//Input:
// NULL
//Output:
// NULL
//Overview: 根据实际应用初始化板子上各设备
//
void Board_Init(void)
{
BUTTON1_TRIS = 1;
BUTTON2_TRIS = 1;
LED_TRIS = 0;
LED_IO = 0x01;
TMR0_Init();
#if defined(PIC_USE_HC595)
HC595_Init();
#endif
#if defined(PIC_USE_LCD12864)
LCD_Init();
#endif
#if defined(PIC_USE_ISD1700)
ISD1700_Init();
#endif
#if defined(PIC_USE_KB)
KeyBoard_Init();
#endif
#if defined(PIC_USE_RS485)
RS485_Init();
#endif
}
#include
#include "HardwareProfile.h"
#if defined(PIC_USE_RS485)
void RS485_Init(void)
{
RS485_DIR_IO = Receive;
RS485_DIR_TRIS = 0;
RS485_RX_TRIS = 1;
RS485_TX_TRIS = 0;
/* SPBRG = DIVIDER;
RCSTA = (NINE_BITS|0x90);
TXSTA = (SPEED|NINE_BITS|0x20);*/
//SPBRG=25; //波特率为 9600 Baud Rate = Fosc/(16*(SPBRG+1))
SPBRG=64;
BRGH=1; //高速波特率使能位
TXEN=1; //发送允许
CREN=1; //连续接收选择位
SPEN=1; //串行口使能位
TXIE=0;
RCIE=0; //接收中断使能开启
TXIF=0;
RCIF=0;
PEIE=1;
GIE=1;
}
void RS485_Putch(BYTE byte)
{
/* output one byte */
while(!TXIF) /* set when register is empty */
continue;
RS485_DIR_IO = Send;
TXREG = byte;
while(!TRMT) /* set when register is empty */
;
RS485_DIR_IO = Receive;
}
BYTE RS485_Getch(void)
{
/* retrieve one byte */
while(!RCIF) /* set when register is not empty */
continue;
RCIF = 0;
return RCREG;
}
BYTE RS485_RW(void)
{
BYTE temp;
RS485_Putch(temp = RS485_Getch());
return temp;
}
#endif
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推荐阅读最新更新时间:2024-03-16 15:48