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/
Diff: Protocols/SPI8.cpp
- Revision:
- 5:b222a9461d6b
- Parent:
- 4:12ba0ecc2c1f
- Child:
- 7:bb0383b91104
--- a/Protocols/SPI8.cpp Sun Feb 15 20:06:07 2015 +0000 +++ b/Protocols/SPI8.cpp Mon Feb 16 00:52:24 2015 +0000 @@ -135,6 +135,52 @@ _CS = 1; #endif } +unsigned int SPI8::rd_data32_wdummy() +{ +#ifdef USE_CS + _CS = 0; +#endif + unsigned int r=0; + _DC.write(1); // 1=data + + r |= _spi.write(0); // we get only 7bit valid, first bit was the dummy cycle + r <<= 8; + r |= _spi.write(0); + r <<= 8; + r |= _spi.write(0); + r <<= 8; + r |= _spi.write(0); + r <<= 1; // 32bits are aligned, now collecting bit_0 + r |= (_spi.write(0) >> 7); + // we clocked 7 more bit so ILI waiting for 8th, we need to reset spi bus + _CS = 1; // force CS HIG to interupt the cmd +#ifndef USE_CS //if CS is not used, force fixed LOW again + _CS = 0; +#endif + return r; +} +unsigned short SPI8::rd_gram() +{ +#ifdef USE_CS + _CS = 0; +#endif + unsigned int r=0; + _DC.write(1); // 1=data + _spi.write(0); // whole first byte is dummy + r |= _spi.write(0); + r <<= 8; + r |= _spi.write(0); + r <<= 8; + r |= _spi.write(0); + _CS = 1; // force CS HIG to interupt the "read state" +#ifndef USE_CS //if CS is not used, force fixed LOW again + _CS = 0; +#endif + // 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 = RGB18to16((r&0xFC0000)>>16, (r&0xFC00)>>8, r&0xFC);// 18bit pixel, rrrrrr00_gggggg00_bbbbbb00, converted to 16bit + return (unsigned short)r; +} void SPI8::hw_reset() { wait_ms(15);