Display drivers

Flexible display driver support for embedded GUI applications

Support for a wide range of display controllers
Configurable drivers for different hardware setups
Support for direct and indirect frame buffer access

Overview

emWin provides display drivers for a wide range of display controllers and hardware configurations. Each driver supports a specific display controller or family of controllers and can be adapted to the target hardware through configuration files, without modifying the driver itself.

Depending on the hardware architecture, emWin supports both directly and indirectly accessible frame buffers. This flexibility allows emWin to be used with different display interfaces and memory configurations.

Systems with directly accessible frame buffers

A directly accessible frame buffer allows the CPU to access video memory through its address and data bus. For these systems, emWin provides the GUIDRV_Lin driver, which supports display controllers with linearly addressable video memory.

The driver manages the contents of video memory without requiring controller-specific code. It can be used with any display controller that provides a compatible linear memory interface.

Displays with indirectly accessible frame buffers

Unlike directly accessible frame buffers, indirectly accessible video memory requires communication with the display controller to read or write data.

For these systems, an LCD controller provides the interface, typically consisting of control and data lines. emWin uses a small set of communication routines to read data from and write data to the display controller.

emWin display drivers

The following table lists the display drivers available for emWin, along with their supported display controllers and color depths.

Display driver	Supported display controllers / Purpose	Supported bits/pixel
GUIDRV_BitPlains	This driver can be used for solutions without display controller. It manages separate bitplains for each color bit. Initially it has been developed to support a solution for an R32C/111 which drives a TFT display without display controller. It can be used for each solution which requires the color bits in separate plains.	1 - 8
GUIDRV_FlexColor	Epson S1D19122 FocalTech FT1509 Himax HX8301, HX8325A, HX8340, HX8347, HX8352, HX8352B, HX8353, HX8357, HX8367 Hitachi HD66772 Ilitek ILI9163, ILI9220, ILI9221, ILI9320, ILI9325, ILI9328, ILI9335, ILI9338, ILI9340, ILI9341, ILI9342, ILI9481, ILI9486, ILI9488, ILI9806 LG Electronics LGDP4525, LGDP4531, LGDP4551 Lucid Display Technology LDT7138 Novatek NT39122 OriseTech SPFD5408, SPFD54124C, SPFD5414D Raio RA8870, RA8875 Renesas R61505, R61516, R61526, R61580 Samsung S6D0117, S6E63D6 Sitronix ST7628, ST7637, ST7687, ST7712, ST7715, ST7735, ST77775, ST7789, ST7796 Solomon SSD1284, SSD1289, SSD1298, SSD1351, SSD1355, SSD1961, SSD1963, SSD2119 Syncoam SEPS525	16,18
GUIDRV_IST3088	Integrated Solutions Technology IST3088, IST3257	4
GUIDRV_Lin	This driver supports every display controller with linear addressable video memory with a direct (full bus) interface. This means that the video RAM is directly addressable by the address lines of the CPU. The driver contains no controller specific code. So it can also be used for solutions without display controller which require a driver which only manages the video RAM.	1, 2, 4, 8, 16, 24, 32
GUIDRV_S1D13513	Epson S1D13513	32
GUIDRV_S1D13748	Epson S1D13748	16
GUIDRV_S1D13781	Epson S1D13781	8
GUIDRV_S1D13C00	Epson S1D13C00	6 + 2
GUIDRV_S1D13L01	Epson S1D13L01	8
GUIDRV_S1D13L02	Epson S1D13L02	16
GUIDRV_S1D13L04	Epson S1D13L04	24, 32
GUIDRV_S1D15G00	Epson S1D15G00	12
GUIDRV_SH_MEM	Sharp Memory LCDs (b/w and 3bpp) with 8- or 10 bit address interface and compatible displays.	1, 3
GUIDRV_SLin	Epson S1D13305, S1D13700 (indirect interface only!) Raio RA8835 Solomon SSD1325, SSD1327, SSD1848 Toshiba T6963 UltraChip UC1617	1, 2
GUIDRV_SLinEPD	Solomon SSD1673	1
GUIDRV_SPage	Avant Electronics SBN0064G Epson S1D15E05, S1D15E06, S1D15605, S1D15606, S1D15607, S1D15608, S1D15705, S1D15710, S1D15714, S1D15719, S1D15721 Hitachi HD61202 Integrated Solutions Technology IST3020, IST3501 New Japan Radio Company NJU6676 Novatek NT7502, NT7534, NT7538, NT75451 Samsung KS0108, S6B0108, S6B0713, S6B0719, S6B0724, S6B1713 Sino Wealth SH1101A Sitronix ST7522, ST75256, ST7565, ST7567, ST7570, ST7591, ST7592 Solomon SSD1303, SSD1305, SSD1306, SSD1316, SSD1805, SSD1815, SSD1821 Sunplus SPLC501C UltraChip UC1610, UC1601, UC1606, UC1608, UC1611, UC1628, UC1638, UC1701	1, 2, 4
GUIDRV_SSD1926	Solomon SSD1926	8
GUIDRV_SSD1322	Solomon SSD1322	4
GUIDRV_UC1698G	UltraChip UC1698G	5