main.cpp

00001 #include "mbed.h"
00002 
00003 I2C i2c(I2C_SDA , I2C_SCL ); 
00004 Serial debug(USBTX, USBRX);
00005 
00006 int main() {
00007     char buffer[2];
00008     buffer[1] = 0xE0;
00009     buffer[0] = 0x86;
00010     int count = 2;
00011     int address = 0x77;
00012     int error;
00013  //   int i2c_frequency = 200 * 1000;
00014     int i2c_frequency = 100 * 1000;
00015     debug.printf("\nI2C BME280 Rest Test");
00016 
00017     i2c.frequency(i2c_frequency);
00018 
00019     i2c.start();
00020     error = i2c.write(address << 1); //We shift it left because mbed takes in 8 bit addreses
00021     i2c.stop();
00022     if (error == 1)
00023     {
00024       debug.printf("\nI2C device found at address 0x%X", address);
00025     }
00026     else
00027     {
00028         debug.printf("\nDevice at IC address Ox%X, not responding", address);
00029     }
00030     
00031     i2c.start();
00032     error = i2c.write(address << 1, buffer, count); //We shift it left because mbed takes in 8 bit addreses
00033     i2c.stop();
00034     if (error == 1)
00035     {
00036       debug.printf("\nBME280 reset request send success");
00037     }
00038     else
00039     {
00040         debug.printf("\nBME280 reset request send failed Error Code: %d", error);
00041     }
00042     debug.printf("\ndone\n");
00043 }