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/BUS16.cpp
- Committer:
- charly
- Date:
- 2018-10-30
- Revision:
- 38:1b6f9fc49a03
- Parent:
- 21:ae0a4eedfc90
File content as of revision 38:1b6f9fc49a03:
/* mbed UniGraphic library - BUS16 protocol class * Copyright (c) 2015 Giuliano Dianda * Released under the MIT License: http://mbed.org/license/mit * * Derived work of: * * mbed library for 240*320 pixel display TFT based on ILI9341 LCD Controller * Copyright (c) 2013 Peter Drescher - DC2PD * * 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 "BUS16.h" BUS16::BUS16(PinName* buspins, PinName CS, PinName reset, PinName DC, PinName WR, PinName RD) : _bus(buspins), _CS(CS), _reset(reset), _DC(DC), _WR(WR), _RD(RD) { _reset = 1; _DC=1; _WR=1; _RD=1; _CS=1; _bus.mode(PullNone); _bus.output(); // will re-enable our GPIO port hw_reset(); } void BUS16::wr_cmd8(unsigned char cmd) { _DC = 0; // 0=cmd _bus.write(cmd); // write 8bit _WR=0; _WR=1; _DC = 1; // 1=data next } void BUS16::wr_data8(unsigned char data) { _bus.write(data); // write 8bit _WR=0; _WR=1; } void BUS16::wr_cmd16(unsigned short cmd) { _DC = 0; // 0=cmd _bus.write(cmd>>8); // write 8bit _WR=0; _WR=1; _bus.write(cmd&0xFF); // write 8bit _WR=0; _WR=1; _DC = 1; // 1=data next } void BUS16::wr_data16(unsigned short data) { _bus.write(data>>8); // write 8bit _WR=0; _WR=1; _bus.write(data&0xFF); // write 8bit _WR=0; _WR=1; } void BUS16::wr_gram(unsigned short data) { _bus.write(data); // write 16bit _WR=0; _WR=1; } void BUS16::wr_gram(unsigned short data, unsigned int count) { while(count) { _bus.write(data); // rewrite even if same data, otherwise too much fast _WR=0; _WR=1; count--; } } void BUS16::wr_grambuf(unsigned short* data, unsigned int lenght) { while(lenght) { _bus.write(*data); // write 16bit _WR=0; _WR=1; data++; lenght--; } } unsigned short BUS16::rd_gram(bool convert) { unsigned int r=0; _bus.input(); _RD = 0; _bus.read(); //dummy read _RD = 1; _RD = 0; // _RD = 0; // add wait r |= _bus.read(); _RD = 1; if(convert) { r <<= 8; _RD = 0; // _RD = 0; // add wait r |= _bus.read()>>8; //MSB of port read is blue, LSB is red of next pixel _RD = 1; // gram is 18bit/pixel, if you set 16bit/pixel (cmd 3A), during writing the 16bits are expanded to 18bit // during reading, you read the raw 18bit gram r = RGB24to16((r&0xFF0000)>>16, (r&0xFF00)>>8, r&0xFF);// 18bit pixel padded to 24bits, rrrrrr00_gggggg00_bbbbbb00, converted to 16bit } _bus.output(); return (unsigned short)r; } unsigned int BUS16::rd_reg_data32(unsigned char reg) { wr_cmd8(reg); unsigned int r=0; // _DC = 1; // 1=data _bus.input(); _RD = 0; _bus.read(); //dummy read _RD = 1; _RD = 0; // _RD = 0; // add wait r |= (_bus.read()&0xFF); r <<= 8; _RD = 1; _RD = 0; // _RD = 0; // add wait r |= (_bus.read()&0xFF); r <<= 8; _RD = 1; _RD = 0; // _RD = 0; // add wait r |= (_bus.read()&0xFF); r <<= 8; _RD = 1; _RD = 0; // _RD = 0; // add wait r |= (_bus.read()&0xFF); _RD = 1; _CS = 1; // toggle CS to interupt the cmd in case was not supported _CS = 0; _bus.output(); return r; } // in Par mode EXTC regs (0xB0-0xFF) can be directly read unsigned int BUS16::rd_extcreg_data32(unsigned char reg, unsigned char SPIreadenablecmd) { return rd_reg_data32(reg); } // ILI932x specific void BUS16::dummyread() { _bus.input(); _RD = 0; _bus.read(); // dummy read _RD=1; // _bus.output(); } // ILI932x specific void BUS16::reg_select(unsigned char reg, bool forread) { _DC = 0; _bus.write(reg); // write 16bit _WR=0; _WR=1; _DC = 1; // 1=data next } // ILI932x specific void BUS16::reg_write(unsigned char reg, unsigned short data) { _DC = 0; _bus.write(reg); // write 16bit _WR=0; _WR=1; _DC = 1; _bus.write(data); // write 16bit _WR=0; _WR=1; } // ILI932x specific unsigned short BUS16::reg_read(unsigned char reg) { unsigned short r=0; _DC = 0; _bus.write(reg); // write 16bit _WR=0; _WR=1; _DC = 1; _bus.input(); _RD=0; r |= _bus.read(); // read 16bit _RD=1; _bus.output(); return r; } void BUS16::hw_reset() { wait_ms(15); _DC = 1; _CS = 1; _WR = 1; _RD = 1; _reset = 0; // display reset wait_ms(2); _reset = 1; // end reset wait_ms(100); } void BUS16::BusEnable(bool enable) { _CS = enable ? 0:1; }