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
• Upload BMP images via USART (16-Bit (5/6/5) RGB)
• Logging via USART

The AVR is clocked with a crystal for reliable communication via USART.

Ideas:

• 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, and upload a BMP image:

c 0xffff // clear display
d // display the demo
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
p 0 0 // prepare to "stream" a 16-Bit (5/6/5) RGB BMP image