This is the firmware for the [HDMI firewall programmer](https://git.cuvoodoo.info/kingkevin/board/src/branch/hdmi_firewall_programmer).
The HDMI firewall programmer copies EDID information onto the [HDMI firewall](https://git.cuvoodoo.info/kingkevin/board/src/branch/hdmi_firewall).

usage
=====

see [hardware description](https://git.cuvoodoo.info/kingkevin/board/src/branch/hdmi_firewall_programmer/README.md).

mode of operation
=================

the EDID can be accessed using the I²C lines on the HDMI port.
the firmware reads and writes the data from slave device address 0x50.

connections
===========

the programmer can be flashed using the micro-USB port (not USB signals):

- the SWIM signal is on USB pin 2 D-
- the NRST signal is on USB pin 4 ID

there is also debugging output using UART (115200 8N1) on STM8S pin 2 PD5/UART_TX.

code
====

the source code is for a STM8S103F3 micro-controller.

compile
=======

requirement: SDCC, make

to compile the source code into a firmware, run `make`.

flash
=====

requirement: stm8flash, a ST-LINK/V2 programmer

to flash the firmware on the micro-controller, run `make flash`.