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As promised here is your driver and test code for the Newhaven Display I2C serial displays. Enjoy and keep us posted on the progress.
using System;
using System.Text;
using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;
namespace NewhavenDisplay
{
// For use with newhaven I2C displays
// I2C protocol:
// To enter the I2C mode, place a jumper on R1.
// SDA and SDK have pull?up resistors (10K Ohm) on R7 and R8.
// The default I2C address is 80 (50 hex). The I2C address can be changed to any 8?bit value by command function, with
// the exception that the LSB (least significant bit) must always be ‘0’. Once the I2C address has been changed, it will be
// saved in the system memory, and it will revert back to the default address if either RS232 or SPI protocol is selected.
// The I2C interface is capable of receiving data at up to 100KHz?clock rate.
// See http://www.newhavendisplay.com/specs/NHD-0216K3Z-FL-GBW.pdf
public class SerialLCD
{
private static I2CDevice.Configuration _config = new I2CDevice.Configuration(0x50 >> 1, 100);
public SerialLCD()
{
}
public void Write(I2CDevice device, string sText)
{
device.Config = _config;
var xActions = new I2CDevice.I2CTransaction[1];
byte[] buf = Encoding.UTF8.GetBytes(sText); // Convert the string to array
xActions[0] = I2CDevice.CreateWriteTransaction(buf);
device.Execute(xActions, 1000);
}
public void DisplayOn(I2CDevice device)
{
device.Config = _config;
var xActions = new I2CDevice.I2CTransaction[1];
xActions[0] = I2CDevice.CreateWriteTransaction(new byte[] { 0xFE, 0x41 });
device.Execute(xActions, 1000);
}
public void DisplayOff(I2CDevice device)
{
device.Config = _config;
var xActions = new I2CDevice.I2CTransaction[1];
xActions[0] = I2CDevice.CreateWriteTransaction(new byte[] { 0xFE, 0x42 });
device.Execute(xActions, 1000);
}
public void SetCursor(I2CDevice device, byte Position)
{ // 0x00 = line 1 column 1
// 0x40 = line 2 column 1
device.Config = _config;
var xActions = new I2CDevice.I2CTransaction[1];
xActions[0] = I2CDevice.CreateWriteTransaction(new byte[] { 0xFE, 0x45, Position });
device.Execute(xActions, 1000);
}
public void Clear(I2CDevice device)
{
device.Config = _config;
var xActions = new I2CDevice.I2CTransaction[1];
xActions[0] = I2CDevice.CreateWriteTransaction(new byte[] { 0xFE, 0x51 });
device.Execute(xActions, 1000);
}
public void SetContrast(I2CDevice device, byte ContrastLevel)
{ // Value between 0 and 50, default is 40
device.Config = _config;
var xActions = new I2CDevice.I2CTransaction[1];
xActions[0] = I2CDevice.CreateWriteTransaction(new byte[] { 0xFE, 0x52, ContrastLevel });
device.Execute(xActions, 1000);
}
public void SetBrightness(I2CDevice device, byte BrightnessLevel)
{ // Value between 1 to 8
device.Config = _config;
var xActions = new I2CDevice.I2CTransaction[1];
xActions[0] = I2CDevice.CreateWriteTransaction(new byte[] { 0xFE, 0x53, BrightnessLevel });
device.Execute(xActions, 1000);
}
public void Firmware(I2CDevice device)
{
device.Config = _config;
var xActions = new I2CDevice.I2CTransaction[1];
xActions[0] = I2CDevice.CreateWriteTransaction(new byte[] { 0xFE, 0x70 });
device.Execute(xActions, 1000);
}
}
}
using System;
using System.Threading;
using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;
using NewhavenDisplay;
namespace Serial_Display_Test
{
public class Program
{
public static void Main()
{
// Create an I2C device with no device configuration
I2CDevice i2cDevice = new I2CDevice(null);
SerialLCD display = new SerialLCD();
display.DisplayOn(i2cDevice);
// Write to display
display.Clear(i2cDevice);
display.SetCursor(i2cDevice, 0x00);
display.Write(i2cDevice, "Hello");
// Wait indefinitely
Thread.Sleep(Timeout.Infinite);
}
}
}
