AVRTFT

Simple project to drive a TFT LCD like the Adafruit 1.8" Color TFT LCD 160x128 ST7735R with an AVR MCU (ATmega328P) and avr-libc.

Currently implemented:

• Mostly complete UTF-8 set (code points U+0000 to U+00FF) of Hack font with antialiasing (4-Bit greyscale)
• Small subset of large glyphs in DejaVu: 0-9 and some special characters
• Draw strings in Hack and DejaVu
• Draw bitmaps (emojis)
• Write text and bitmaps via USART
• Logging via USART

Ideas:

• Write pictures via USART (probably too slow)
• Read pictures from SD Card
• Display 4K@50Hz videos...

Write something via USART

Connect to the controller with for example GTKTerm (9600 Baud).
Write some text and a bitmap:

c 0xffff // clear display
t 0 0 h Just some text // write text in Hack to row 0 column 0
b 0 112 0 // write bitmap with index 0 ('blush' emoji) to row 0 column 224
d // display the demo