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
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/
Protocols/I2C_bus.cpp
- Committer:
- charly
- Date:
- 2018-04-22
- Revision:
- 36:668396f861d2
- Parent:
- 33:f87f06292637
File content as of revision 36:668396f861d2:
/* mbed UniGraphic library - I2C protocol class * Copyright (c) 2017 Peter Drescher * Released under the MIT License: http://mbed.org/license/mit * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "I2C_bus.h" I2C_bus::I2C_bus(int Hz, int address, PinName sda, PinName scl, PinName reset) : _i2c(sda,scl), _reset(reset) { _i2c.frequency(Hz); _address = address; _reset = 1; hw_reset(); } void I2C_bus::wr_cmd8(unsigned char cmd) { char tmp[2]; tmp[0] = 0x00; //command tmp[1] = cmd; _i2c.write(_address,tmp,2); } void I2C_bus::wr_data8(unsigned char data) { 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) { char tmp[3]; tmp[0] = 00; //command tmp[1] = cmd>>8; tmp[2] = cmd&0xFF; _i2c.write(_address,tmp,3); } void I2C_bus::wr_data16(unsigned short data) { _i2c.write(data>>8); // write 8bit _i2c.write(data&0xFF); // write 8bit } void I2C_bus::wr_gram(unsigned short data) { _i2c.write(data>>8); // write 8bit _i2c.write(data&0xFF); // write 8bit } void I2C_bus::wr_gram(unsigned short data, unsigned int count) { _i2c.start(); _i2c.write(_address); _i2c.write(0x40); // data continue if((data>>8)==(data&0xFF)) { count<<=1; while(count) { _i2c.write(data); // write 8bit count--; } } else { while(count) { _i2c.write(data>>8); // write 8bit _i2c.write(data&0xFF); // write 8bit count--; } } _i2c.stop(); } void I2C_bus::wr_grambuf(unsigned short* data, unsigned int lenght) { _i2c.start(); _i2c.write(_address); _i2c.write(0x40); // data continue while(lenght) { //_i2c.write((*data)>>8); // write high 8bit _i2c.write((*data)&0xFF); // write low 8bit _i2c.write((*data)>>8); // write high 8bit data++; lenght--; } _i2c.stop(); } 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) { } void I2C_bus::reg_select(unsigned char reg, bool forread) { } unsigned int I2C_bus::rd_reg_data32(unsigned char reg) { return 0; } unsigned int I2C_bus::rd_extcreg_data32(unsigned char reg, unsigned char SPIreadenablecmd) { return 0; } void I2C_bus::dummyread() { } unsigned short I2C_bus::rd_gram(bool convert) { return (0); } unsigned short I2C_bus::reg_read(unsigned char reg) { return (0); } void I2C_bus::reg_write(unsigned char reg, unsigned short data) { }