File content as of revision 2:caa0e6b2b436:

// Demo Program for Labmbed Board

#include "mbed.h"
#include "TextLCD.h"

TextLCD lcd(p15, p16, p17, p18, p19, p20);          // LCD: RS, E, D4-D7
SPI spi(p5, p6, p7);                                // SPI: MOSI, MISO, SCLK (MISO not used with LCD)
DigitalOut lat(p8);                                 // data latch for LED driver TLC59281
I2C i2c(p9, p10);                                   // I2C: SDA, SCL

int led_bits = 0;                                   // global LED status used for readback
const int tmp102addr = 0x92;                        // TMP102 temperature I2C address


void initleds() {
    lat = 0;                                        // latch must start low
    spi.format(16,0);                               // SPI 16 bit data, low state, high going clock
    spi.frequency(1000000);                         // 1MHz clock rate
}

void setleds(int ledall) {
    led_bits = ledall;                              // update global LED status
    spi.write((led_bits & 0x03ff) | ((led_bits & 0xa800) >> 1) | ((led_bits & 0x5400) << 1));
    lat = 1;                                        // latch pulse start 
    lat = 0;                                        // latch pulse end
}

void setled(int ledno, int ledstate) {
    ledno = ((ledno - 1) & 0x0007) + 1;             // limit led number
    ledno = (8 - ledno) * 2;                        // offset of led state in 'led_bits'
    ledstate = ledstate & 0x0003;                   // limit led state
    ledstate = ledstate << ledno;
    int statemask = ((0x0003 << ledno) ^ 0xffff);   // mask used to clear led state
    led_bits = ((led_bits & statemask) | ledstate); // clear and set led state
    setleds(led_bits);
}

int readled(int ledno) {
    ledno = ((ledno - 1) & 0x0007) + 1;             // limit led number
    ledno = (8 - ledno) * 2;                        // offset of led state in 'led_bits'
    int ledstate = led_bits;
    ledstate = ledstate >> ledno;                   // shift selected led state into ls 2 bits
    return (ledstate & 0x0003);                     // mask out and return led state
}

int readleds() {
    return led_bits;                                // return LED status
}

//int readswitch(int switchno) {
//}

//int readswitches(int switchno) {
//}

//int readkey(int keyno) {
//}

//int readkeyrow(int keyrow) {
//}

//int readkeys() {
//}

float readtemp() {
    char cmd[3];
    cmd[0] = 0x01;                                  // pointer register value
    cmd[1] = 0x60;                                  // byte 1 of the configuration register
    cmd[2] = 0xa0;                                  // byte 2 of the configuration register
    i2c.write(tmp102addr, cmd, 3);                  // select configuration register and write 0x60a0 to it
    wait(0.5);                                      // wait for conversion
    cmd[0] = 0x00;                                  // pointer register value
    i2c.write(tmp102addr, cmd, 1);                  // select temperature register
    i2c.read(tmp102addr, cmd, 2);                   // read 16-bit temperature register 
    return (float((cmd[0]<<8)|cmd[1]) / 256.0);     // divide by 256 and return temperature
}

int main() {
    
    initleds();
  
    while(1) {
        int a,b;
        for (b = 0; b < 4; b++ ) {
            for (a = 1; a < 9; a++ ) {
                setled (a,b);
                wait(.5);
            }
        }
    float temp = readtemp();
    lcd.printf("                \n");   
    lcd.printf("Temp = %f\n", temp);
    wait(3);
    }
}