dmx512灯光调光控制程序

《dmx512灯光调光控制程序》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、编写周工，单片机开发，上位机开发13712446099#include#defineucharunsignedchar#defineDELAY_TIME60/*经实验，不要小于50!否则可能造成时序混乱*/#defineTRUE1//IIC返冋应答正确#defineFALSE0sbitT_D=P3八1;//TXDsbitR_D=P3A2;//RXDsbitled_green=P2A0;//信号发送指示灯sbitled_yellow=P2Al;//信号接收指示灯sbitTorR=P3A7;//485接收标

2、志sbitSDA=P0Al;/*假设由P0.1和P0.2控制*/sbitSCL=P0A2;bitflag;//数据标志位staticucharrdata[721;staticucharn=72;staticucharcounter;staticuchartotalnum;staticuchartimes;//接收数据缓冲区//接收汁数器//分三次接收标记位voidldelay(uchart){uchari;uchark=200;while(t->0){while(k—>0)for(i=0;i<255;i++);}}/**

3、********FunetionDefinition************,voidDELAY(uchart)/*延时函数*/{while(t!=0)t-；}voidI2C_Start(void){/*启动I2C总线的函数，当SCL为高电平时使SDA产生一个负跳变*/SDA=1;SCL=1;DELAY(DELAY_TIME);SDA=O;DELAY(DELAY一TIME);SCL=O;DELAY(DELAY_TIME);voidI2C一Stop(void){/*终止I2C总线，当SCL为高电平时使SDA产生一个正跳变*

4、/SDA=0;SCL=1;DELAY(DELAY一TIME);SDA=1;DELAY(DELAY_TIME);SCL=0;DELAY(DELAY_TIME);voidSEND_0(void)/*SENDACK*/{/*发送0,在SCL为高电平时使SDA信号为低*/SDA=0;SCL=1;DELAY(DELAY_TIME);SCL=0;DELAY(DELAY_TIME);voidSEND_l(void){/*发送1，在SCL为高电平时使SDA信号为高*/SDA=1;SCL=1;DELAY(DELAY_TIME);SCL=0

5、;DELAY(DELAY_TIME);bitCheck一Acknowledge(void){/*发送完一个字节后检验设备的应答信号*/SDA=1;SCL=1;DELAY(DELAY_TIME/2);FO=SDA;DELAY(DELAY_TIME/2);SCL=O;DELAY(DELAY_TIME);if(FO==l){returnFALSE;}returnTRUE;voidWriteI2CByte(charb){/*向I2C总线写一个字节*/uchari;for(i=0;i<8;i++){if((b«i)&0x80)SE

6、NDJO;elseSEND_0();}ucharReadI2CByte(void){/*从I2C总线读一个字节*/ucharb=0，i;for(i=0;i<8;i++)!SDA=1;/*释放总线*/SCL=1;/*接受数据*/DELAY(IO);F0=SDA;DELAY(IO);SCL=O;if(FO==l)b=b«l;b=b+OxOl;elseb=b«l;}returnb;}产*********以下为读写24c02的函数**********//*voidWrite_One_Byte(charaddr，chartheda

7、ta){bitacktemp=l;I2C_Start();WriteI2CByte(0xa0);acktemp=Check_Acknowledge();WriteI2CByte(addr);acktemp=Check_Acknowledge();WriteI2CByte(thedata);acktemp=Check_Acknowledge();I2C_Stop();}*/voidWrite_A_Page(uchar*buffer，ucharaddr){bitacktemp=1;uchari;/*writeapagetoa

8、t24c02*/I2C_Start();WriteI2CByte(0xa0);acktemp=Check_Acknowledge();WriteI2CByte(addr);/*address*/acktemp二Check_Acknowledge();for(i=0;i<8;i++){WriteI2CByte(buff