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80黑币
用串口调试助手,将数据通过UART下发到单片机当中, 并且存储到EEPROM中, 然后将电源关掉, 重新上电读取EEPROM的数据并数码管上显示出来,但是我现在数据发送单片机也接收了,就是无法存储到EEPROM中,望各位朋友帮忙指点一下,谢谢!
以下是单片机代码:
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- #include <reg52.h>
- #include <intrins.h>
- #define I2CDelay() {_nop_();_nop_();_nop_();_nop_();}
- sbit I2C_SCL = P0^6;
- sbit I2C_SDA = P0^7;
- unsigned char ucDataOneTab[10] = {0x3f,0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f,0x6f};
- unsigned char ucDataTwoTab[8] = {0xFE, 0xFD, 0xFB, 0xF7, 0xEF, 0xDF, 0xBF, 0x7F};
- unsigned char disbuf[8] = {0x3f,0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07};
- sbit LED_SMG_RCK = P1^0;
- sbit LED_SMG_SCK = P1^1;
- sbit LED_SMG_DATA = P1^4;
- unsigned char RxdByte;
- //数码管显示函数
- void Send_data_smg(unsigned int uiDataOne,unsigned int uiDataTwo)
- {
- unsigned char i;
-
- LED_SMG_RCK = 0;
- for(i=0; i<8; i++)
- {
- LED_SMG_SCK = 0;
- if(0 != (uiDataOne&0x80))
- {
- LED_SMG_DATA = 1;
- }
- else
- {
- LED_SMG_DATA = 0;
- }
- LED_SMG_SCK = 1;
- uiDataOne <<= 1;
- }
-
- for(i=0; i<8; i++)
- {
- LED_SMG_SCK = 0;
- if(0 != (uiDataTwo&0x80))
- {
- LED_SMG_DATA = 1;
- }
- else
- {
- LED_SMG_DATA = 0;
- }
- LED_SMG_SCK = 1;
- uiDataTwo <<= 1;
- }
- LED_SMG_RCK = 1;
- }
- /* 产生总线起始信号 */
- void I2CStart()
- {
- I2C_SDA = 1; //首先确保 SDA、 SCL 都是高电平
- I2C_SCL = 1;
- I2CDelay();
- I2C_SDA = 0; //先拉低 SDA
- I2CDelay();
- I2C_SCL = 0; //再拉低 SCL
- }
- /* 产生总线停止信号 */
- void I2CStop()
- {
- I2C_SCL = 0; //首先确保 SDA、 SCL 都是低电平
- I2C_SDA = 0;
- I2CDelay();
- I2C_SCL = 1; //先拉高 SCL
- I2CDelay();
- I2C_SDA = 1; //再拉高 SDA
- I2CDelay();
- }
- /* I2C 总线写操作, dat-待写入字节,返回值-从机应答位的值 */
- bit I2CWrite(unsigned char dat)
- {
- bit ack; //用于暂存应答位的值
- unsigned char mask; //用于探测字节内某一位值的掩码变量
- for (mask=0x80; mask!=0; mask>>=1) //从高位到低位依次进行
- {
- if ((mask&dat) == 0) //该位的值输出到 SDA 上
- I2C_SDA = 0;
- else
- I2C_SDA = 1;
-
- I2CDelay();
- I2C_SCL = 1; //拉高 SCL
- I2CDelay();
- I2C_SCL = 0; //再拉低 SCL,完成一个位周期
- }
- I2C_SDA = 1; //8 位数据发送完后,主机释放 SDA,以检测从机应答
- I2CDelay();
- I2C_SCL = 1; //拉高 SCL
- ack = I2C_SDA; //读取此时的 SDA 值,即为从机的应答值
- I2CDelay();
- I2C_SCL = 0; //再拉低 SCL 完成应答位,并保持住总线
- return (~ack); //应答值取反以符合通常的逻辑:
- //0=不存在或忙或写入失败, 1=存在且空闲或写入成功
- }
- /* I2C 总线读操作,并发送非应答信号,返回值-读到的字节 */
- unsigned char I2CReadNAK()
- {
- unsigned char mask;
- unsigned char dat;
- I2C_SDA = 1; //首先确保主机释放 SDA
- for (mask=0x80; mask!=0; mask>>=1) //从高位到低位依次进行
- {
- I2CDelay();
- I2C_SCL = 1; //拉高 SCL
- if(I2C_SDA == 0) //读取 SDA 的值
- dat &= ~mask; //为 0 时, dat 中对应位清零
- else
- dat |= mask; //为 1 时, dat 中对应位置 1
- I2CDelay();
- I2C_SCL = 0; //再拉低 SCL,以使从机发送出下一位
- }
- I2C_SDA = 1; //8 位数据发送完后,拉高 SDA,发送非应答信号
- I2CDelay();
- I2C_SCL = 1; //拉高 SCL
- I2CDelay();
- I2C_SCL = 0; //再拉低 SCL 完成非应答位,并保持住总线
- return dat;
- }
- /* I2C 总线读操作,并发送应答信号,返回值-读到的字节 */
- unsigned char I2CReadACK()
- {
- unsigned char mask;
- unsigned char dat;
- I2C_SDA = 1; //首先确保主机释放 SDA
- for (mask=0x80; mask!=0; mask>>=1) //从高位到低位依次进行
- {
- I2CDelay();
- I2C_SCL = 1; //拉高 SCL
- if(I2C_SDA == 0) //读取 SDA 的值
- dat &= ~mask; //为 0 时, dat 中对应位清零
- else
- dat |= mask; //为 1 时, dat 中对应位置 1
- I2CDelay();
- I2C_SCL = 0; //再拉低 SCL,以使从机发送出下一位
- }
- I2C_SDA = 0; //8 位数据发送完后,拉低 SDA,发送应答信号
- I2CDelay();
- I2C_SCL = 1; //拉高 SCL
- I2CDelay();
- I2C_SCL = 0; //再拉低 SCL 完成应答位,并保持住总线
-
- return dat;
- }
- /* 读取 EEPROM 中的一个字节, addr-字节地址 */
- unsigned char E2ReadByte(unsigned char addr)
- {
- unsigned char dat;
- I2CStart();
- I2CWrite(0x50<<1); //寻址器件,后续为写操作
- I2CWrite(addr); //写入存储地址
- I2CStart(); //发送重复启动信号
- I2CWrite((0x50<<1)|0x01); //寻址器件,后续为读操作
- dat = I2CReadNAK(); //读取一个字节数据
- I2CStop();
- return dat;
- }
- /* 向 EEPROM 中写入一个字节, addr-字节地址 */
- void E2WriteByte(unsigned char addr, unsigned char dat)
- {
- I2CStart();
- I2CWrite(0x50<<1); //寻址器件,后续为写操作
- I2CWrite(addr); //写入存储地址
- I2CWrite(dat); //写入一个字节数据
- I2CStop();
- }
- void Delay1ms(unsigned int i)
- {
- int j;
- for(; i>0; i--)
- {
- for(j = 0; j < 110; j++);
- }
- }
- void ConfigUart(unsigned int baud)
- {
- SCON = 0x50;
- TMOD &= 0x0F;
- TMOD |= 0x20;
- TH1 = 256 - (11059200/12/32)/baud;
- TL1 = TH1;
- TR1 = 1;
- ET1 = 0;
- ES = 1;
- }
- void main()
- {
- unsigned char dat;
- unsigned char i;
- unsigned char str[5];
-
- EA = 1;
- ConfigUart(9600);
-
- RxdByte = E2ReadByte(0x20);
- Delay1ms(100);
-
- str[0] = (RxdByte/100);
- str[1] = (RxdByte/10%10);
- str[2] = (RxdByte%10);
-
- //dat++;
- E2WriteByte(0x20,RxdByte);//将数据存储到E2PROM中
- disbuf[2] = ucDataOneTab[str[2]];
- disbuf[1] = ucDataOneTab[str[1]];
- disbuf[0] = ucDataOneTab[str[0]];
-
- while(1)
- {
- for(i=0; i<8; i++)
- {
- Send_data_smg(disbuf[i],ucDataTwoTab[i]);
- Delay1ms(1);
- }
- }
- }
- /* UART中断服务函数 */
- void InterruptUART() interrupt 4
- {
- if (RI) //接收到字节
- {
- RI = 0; //手动清零接收中断标志位
- RxdByte = SBUF; //接收到的数据保存到接收字节变量中
- //用以提示用户输入的信息是否已正确接收
- SBUF = RxdByte;
- }
- if (TI) //字节发送完毕
- {
- TI = 0; //手动清零发送中断标志位
- }
- }
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