Trinket serial & analog terminal

I'm working on the max232 integration and the DB9 connector.

And it's good Rx and Tx are ok.

I'm adding RTS, CTS and I'll try to flash it using USB-RS232 cable

I've added the possibility to analyze and view A0 and A1 trinket pins on the screen.

A0 & A1 can be used as inputs, inputs pullups and/or outputs.

IN: input / OU: output / UN: unused

3 modes (A0==UN && A1==UN not a possible case):

1. Input mode : (A0 == IN && A1 == IN) || (A0 == IN && A1 == UN) || (A0 == UN && A1 == IN)
2. Output mode : (A0 == OU && A1==OU) || (A0 == OU && A1 == UN) || (A0 == UN && A1 == OU)
3. Mixed mode : (A0 == OU && A1==IN) || (A0 == IN && A1 == OU)

Oscilloscope screen works :)

ATmega 328p datasheet extract

http://arduino.cc/en/Serial/begin

The firmware will support:

• Speed: 300 / 1.2k / 2.4k / 4.8k / 9.6k / 19.2k / 38.4k / 57.5k / 115.2k / 230.4k / 460.8k / 500k / 576k / 921.6k / 1M / manual value between 300 and 1M
• Data / parity / stopbits:
  • None parity:
    
    • 5N1
    • 6N1
    • 7N1
    • 8N1
    • 5N2
    • 6N2
    • 7N2
    • 8N2
  • Even parity:
    • 5E1
    • 6E1
    • 7E1
    • 8E1
    • 5E2
    • 6E2
    • 7E2
    • 8E2
  • Odd parity:
    • 5O1
    • 6O1
    • 7O1
    • 8O1
    • 5O2
    • 6O2
    • 7O2
    • 8O2

At the moment, the trinket is powered by battery :)

Left to right: Trinket, battery level switch, charge/battery platform, 4 switchs (Rx/Tx/RTS /CTS to select TTL and/or RS232 level on each line)

Middle right: Trinket power switch (On/Off)

Cut protoboard

With screen mounts, trinket and charge/5V module

I'm now 3D printing a screen holder test part. (ABS)

It's good. I have now the good screen size.

Computer (Minicom) => USB-FTDI <=> Rx/Tx <= Trinket (Screen)

Computer:

TSPT

I'll use it in SPI mode, so I have to solder closed IM1 IM2 and IM3 bridges (not IM0)

It works :)

Size: 82mm * 62mm * 8mm

Useful: https://learn.adafruit.com/adafruit-2-dot-8-color-tft-touchscreen-breakout-v2