main.cpp

00001 #include "mbed.h"
00002 #include "wire.h"
00003  
00004 #define SCL         7  
00005 #define SDA         30
00006  
00007 TwoWire Wire = TwoWire(NRF_TWI1);
00008 
00009 int main(void)
00010 {
00011     Wire.begin(SCL, SDA, TWI_FREQUENCY_100K);
00012     printf("IIC Demo Start \r\n");
00013 
00014     while(1)
00015     {
00016         int nDevices = 0;
00017         for(int address = 1; address < 127; address++ ) 
00018         {
00019             int error = -1;
00020             Wire.beginTransmission(address << 1);
00021             Wire.write(0x00);
00022             error = Wire.endTransmission();
00023                        
00024             if (error == 0)
00025             {
00026               printf("I2C device found at address %d 0x%X %d \n\r",address, address, error); //Returns 7-bit address
00027               nDevices++;
00028             }
00029         }
00030         if (nDevices == 0)
00031         {
00032             printf("No I2C devices found\n\r");
00033         }
00034         else{}
00035         printf("\ndone\n\r");
00036         
00037         wait(2);           // wait 2 seconds for next scan
00038           
00039     }
00040 }
00041