videochargen/README.md

# Video Character Generator
Atmel-AVR based electronic text/image superimposition device, for analog PAL video.

(don't tell anyone, but, since it is B/W, should work for SECAM and NTSC too ☺)

<img alt="Example image with drawings" src="scrot/02.png" style="max-width: 10cm;"><img alt="Example image with text" src="scrot/01.png" style="max-width: 10cm;">

## Quick start
1. Prepare your slides in B/W PBM format
2. `g++ frame.cpp -o frame`
3. `./frame image1.pbm [image2.pbm...]`
4. plug your Atmel programmer
5. `make flash`

## PIN Settings
| PORT | PIN | dir | description       |
| ---- | --- | --- | ----------------- |
| PD2  | 4   | IN  | vertical sync     |
| PD3  | 5   | IN  | horizontal sync   |
| PB2  | 16  | IN  | transition mode   |
| PB3  | 17  | IN  | next image button |
| PB4  | 18  | OUT | white dot output  |
| PB5  | 19  | OUT | led               |
implemented transition mode if transition_mode pin is high, then images are shown continuosly (eg the next image is shown as soon as the next_image button is pressed) but if transition_mode pin is low, then, when you press the button, the current image disappears, and the next one appears when you press the button again 2021-08-12 20:53:27 +00:00			`# Video Character Generator`
Update README.md with quick start guide. 2022-09-29 20:04:50 +00:00			`Atmel-AVR based electronic text/image superimposition device, for analog PAL video.`

			`(don't tell anyone, but, since it is B/W, should work for SECAM and NTSC too ☺)`

Add example images to README.md 2022-09-29 20:16:03 +00:00			`<img alt="Example image with drawings" src="scrot/02.png" style="max-width: 10cm;"><img alt="Example image with text" src="scrot/01.png" style="max-width: 10cm;">`

Update README.md with quick start guide. 2022-09-29 20:04:50 +00:00			`## Quick start`
			`1. Prepare your slides in B/W PBM format`
			2. `g++ frame.cpp -o frame`
			3. `./frame image1.pbm [image2.pbm...]`
			`4. plug your Atmel programmer`
			5. `make flash`
implemented transition mode if transition_mode pin is high, then images are shown continuosly (eg the next image is shown as soon as the next_image button is pressed) but if transition_mode pin is low, then, when you press the button, the current image disappears, and the next one appears when you press the button again 2021-08-12 20:53:27 +00:00
			`## PIN Settings`
			`\| PORT \| PIN \| dir \| description \|`
			`\| ---- \| --- \| --- \| ----------------- \|`
			`\| PD2 \| 4 \| IN \| vertical sync \|`
			`\| PD3 \| 5 \| IN \| horizontal sync \|`
			`\| PB2 \| 16 \| IN \| transition mode \|`
			`\| PB3 \| 17 \| IN \| next image button \|`
			`\| PB4 \| 18 \| OUT \| white dot output \|`
			`\| PB5 \| 19 \| OUT \| led \|`