Karl Zweimüller
UniGraphic-Fork for ST7920-LCD-controller and SH1106. Tested with 128x64 LCD with SPI and 128x64-OLED with IIC
Dependents: UniGraphic-St7920-Test AfficheurUTILECO
Fork of
UniGraphic
by 
GraphicsDisplay
Fork of the UniGraphic-Library for monochrome LCDs with ST7920 controller and 128x64-IIC-OLED-Display with SH1106-Controller
Had to adapt LCD for following reasons:
- Give access to screenbuffer buffer[] to parent class
- pixel() and pixel_read() as they are hardware-dependent
- added reset-pin to IIC-Interface
GraphicDisplay:: sends buffer to LCD when auto_update is set to true.
Testprogram for ST7920 can be found here:
https://developer.mbed.org/users/charly/code/UniGraphic-St7920-Test/
Diff: Protocols/I2C_bus.cpp
- Revision:
- 36:668396f861d2
- Parent:
- 33:f87f06292637
--- a/Protocols/I2C_bus.cpp Sun May 21 20:50:09 2017 +0000
+++ b/Protocols/I2C_bus.cpp Sun Apr 22 21:41:24 2018 +0000
@@ -13,12 +13,13 @@
#include "I2C_bus.h"
-I2C_bus::I2C_bus(int Hz, int address, PinName sda, PinName scl)
- : _i2c(sda,scl)
+I2C_bus::I2C_bus(int Hz, int address, PinName sda, PinName scl, PinName reset)
+ : _i2c(sda,scl), _reset(reset)
{
_i2c.frequency(Hz);
_address = address;
- //hw_reset();
+ _reset = 1;
+ hw_reset();
}
void I2C_bus::wr_cmd8(unsigned char cmd)
@@ -30,7 +31,10 @@
}
void I2C_bus::wr_data8(unsigned char data)
{
- _i2c.write(data); // write 8bit
+ char tmp[2];
+ tmp[0] = 0x40; //data mode
+ tmp[1] = data;
+ _i2c.write(_address,tmp,2); // write
}
void I2C_bus::wr_cmd16(unsigned short cmd)
{
@@ -83,8 +87,9 @@
_i2c.write(0x40); // data continue
while(lenght)
{
- _i2c.write((*data)>>8); // write 8bit
- _i2c.write((*data)&0xFF); // write 8bit
+ //_i2c.write((*data)>>8); // write high 8bit
+ _i2c.write((*data)&0xFF); // write low 8bit
+ _i2c.write((*data)>>8); // write high 8bit
data++;
lenght--;
}
@@ -93,7 +98,11 @@
void I2C_bus::hw_reset()
{
-
+ wait_ms(15);
+ _reset = 0; // display reset
+ wait_ms(2);
+ _reset = 1; // end reset
+ wait_ms(100);
}
void I2C_bus::BusEnable(bool enable)
{