hid-test

Imported from GitHub: Karethoth/HID-Test · commit 24783af · license GPL-3.0

Description

ATmega644 practice device

README

------------------ ILI9163 / ST7735 driver for Atmel MCUs ---------------------

• author: Henryk Richter [email protected] -

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This is a quite fast driver for cheap 1.44" (128x128) or 1.8" (128x160) LCDs. Most of these LCDs come either with an ILI9163 or ST7735 controller chip.

Interestingly for me, the seller insisted on using an ILI9163 driver for the display (which I did at first) but on the other hand, the packaging of my particular display said "ST7735". Hmpf. So in essence, one can safely assume that the ST7735 chips are quite versatile in their command handling.

This driver is named ILI9163 but should support both types.

The main reason for me to implement an own driver was the desire to support all three color depths of the display controller. Especially the 12 Bit mode is of interest for fast applications (like demos) with real-time graphics. The 18 Bit mode (which was to my knowledge not implemented before in open source code) on the other hand comes in handy for natural images.

Features (usual = - , special features = !!):

• Initialization / SPI Write
  • either HW SPI at up to f/2 (f=MCU clock) or
  • fast Software SPI at f/4, i.e. 4 MHz SPI with 16 MHz MCU
• modular, just disable #defines for functionality you don't need !! 12/16/18 Bit bit depths supported
• Display orientation change in 90 degree units
• Pixel setting
• Area Fill !! High/True Color image display (see included image converter for 12/16/18 Bit) !! High/True Color scaled image display (bresenham based nearest neighbor) !! 8 Bit image display (with individual color table)
  • low Flash requirements with just 8 Bit per pixel instead of 12/16/18
  • automatic conversion to active display mode (12/16/18 Bit) !! PutLine function, which shows a single line (or column when changing the display orientation) from RAM on screen, useful for demo effects (input line in RAM as indexed color, output in current display mode) !! Text functions with multiple font support
  • foreground/background color selectable
  • more than one font at once

Other primitives like arbitrary lines (horizontal/vertical lines can be drawn by LCD_FillRect() ) and circles are not included here but can be easily copied from other implementations if necessary.

Quick start:

• see ILI9163.h for PIN assigment Atmel->LCD, modify the LCD_PORT_,LCD_DDR_, LCD_PIN_* defines if necessary, the default is suitable for hardware SPI on Atmega328 (or software SPI on any Atmega with a usable Port B)
• initialization: call LCD_init(), afterwards the display is ready for drawing
• a quick first test for proper settings and connections would be { color_t a; while(1){ LCD_FillScreen( a );a ^= 0xffff; } }
• colors can be specified with the LCD_RGB() macro which converts the color to the active bit depth at compile-time for static tables or at runtime for dynamically specified colors
• see demoloop.c for an overview of the functionality