main.cpp

00001 #include "mbed.h"
00002 #define DEV_ADDR    0xAE
00003 
00004 I2C     i2c(PB_11, PB_10);
00005 Serial     pc(PA_2, PA_3);
00006 AnalogIn        FWD(PA_0);
00007 AnalogIn        REF(PA_1);
00008 
00009 void AT24C32_WriteBytes(uint16_t addr, uint8_t *pbuf, uint16_t length)
00010 {
00011     char buf[length+2];
00012     buf[0] = (uint8_t)(addr>>8);
00013     buf[1] = (uint8_t)(addr);
00014     memcpy(&buf[2], pbuf, length); 
00015     i2c.write(DEV_ADDR, buf, length+2, false);
00016 }
00017 
00018 void AT24C32_ReadBytes(uint16_t addr, uint8_t *pbuf, uint16_t length)
00019 {
00020     char buf[2];
00021     buf[0] = (uint8_t)(addr>>8);
00022     buf[1] = (uint8_t)(addr);
00023     i2c.write(DEV_ADDR, buf, 2, false);
00024     
00025     i2c.read(DEV_ADDR, (char *)pbuf, length, false);
00026 }
00027 
00028 float measure_REF;
00029 
00030 uint8_t w_buf[1];
00031 uint8_t r_buf[1];
00032 uint8_t byte =0;
00033 int addr=0x00;
00034 char Data=0;
00035 int main(void)
00036 {
00037     uint8_t index=0;
00038  
00039   
00040     pc.baud(9600);
00041     pc.printf("IIC Demo Start \r\n");
00042     
00043     while(1)
00044     {
00045 //WRITE**************************************
00046         
00047         uint8_t byte = REF.read_u16() >> 8;
00048         pc.printf("EEPROM Write Byte= %d\n",byte);
00049         AT24C32_WriteBytes(addr,&byte,1);
00050 //*******************************************
00051 
00052 //READ***************************************      
00053         wait(1);
00054         AT24C32_ReadBytes(addr, r_buf,1);
00055         for(index=0; index<1; index++)
00056         Data=(r_buf[index]);
00057         pc.printf("EEPROM Read Byte=%d\n",Data);
00058         
00059     }
00060 }