File content as of revision 0:d488d550469e:

#include "mbed.h"

DigitalInOut PDIO(p30);
DigitalOut CSn(p21);
Serial pc(USBTX, USBRX);

int read_temperature(I2C i2c, int addr, float *temperature)
{
    char data[5];
    int status = i2c.read(addr, data, 5);
    *temperature = data[4]*0.667-75;
    return status;
}

void OTP_setup()
{
    DigitalOut CLK(p27);
    PDIO.output();
    PDIO = 1;
    CLK = 0;
    CSn = 0;
    wait_ms(1);
    CSn = 1;
    wait_us(30);
    CSn = 0;
    wait_us(30);
    CLK = 1;
    wait_us(30);
    CLK = 0;
    wait_us(30);
}

void OTP_exit()
{
    DigitalOut CLK(p27);
    CLK = 0;
    CSn = 0;
    PDIO = 1;
    wait_us(30);
    CLK = 1;
    wait_us(30);
    CLK = 0;
    wait_us(30);
    CLK = 1;
    wait_us(30);
    CSn = 1;
    wait_us(30);
    
}

void OTP_read(char *data, int length)
{
    DigitalOut CLK(p27);
    CLK = 1;
    PDIO = 0;
    wait_us(30);
    CSn = 1;
    wait_us(30);
    CLK = 0;
    wait_us(30);
    
    //generate two CLK pulses
    for(int i=0; i<2; i++)
    {
        CLK = 1;
        wait_us(30);
        CLK = 0;
        wait_us(15);
        
        //switch PDIO to input on first faling edge of CLK
        if(i==0)
            PDIO.input();
        wait_us(15);
    }
    
    uint32_t factory_section = 0;
    uint8_t I2C_A = 0; //I2C address <5:1>
    uint8_t CCW = 0; //change increasing/decreasing code with encoder movement
    uint16_t Z = 0; //zero position
    
    //read all parameters
    read_bits(&factory_section, 29);
    read_bits(&I2C_A, 5);
    read_bits(&CCW, 1);
    read_bits(&Z, 12);
}

int scan_NSE5310()
{
    CSn = 0;
    I2C i2c(p28, p27);
    int device_count = 0;
    for(int addr=0x80; addr<0xFE; addr+=2)
    {
        float temperature;
        //pc.printf("addr:0x%02X\n", addr);
        if(read_temperature(i2c, addr, &temperature)==0)
        {
            pc.printf("Found device: 0x%02X, Temperature: %2.1fC\n", addr, temperature);
            device_count++;
        }
    }
    return device_count;
}

int main() {
    pc.baud(115200);
    pc.printf("Scanning for NSE5310 devices...\n");
    int device_count = scan_NSE5310();
    //pc.printf("device_count=%d\n", device_count);
    if(device_count==0)
        pc.printf("No device found. Completed.\n");
    else if(device_count>1)
        pc.printf("Found more than one device. Completed.\n");
    else if(device_count==1)
    {
        pc.printf("Entering programming mode...\n");
        OTP_setup();
    }
    while(1);
}