Add Safety Waring to Firmware Instructions.

[boyddotee]

First up thank you, a very worthwhile upgrade works a lot better even without the extra sensor!

I may have overlooked it in but in following the instructions for the firmware, the oven got so hot it scorched the paper pad I had it stood on at the time 😅. Maybe add a little warning added to the instructions would be wise. Had assumed the elements wouldn't come on.

On another note, I to also experienced the blank screen issues reported without the lid on, it went away (there is no sensor that I could see) after installing it and rebooting a few times, might just be a quirk of the toolchain/micro that I'm not familiar with (worth downloading a copy of the firmware from the chip if you can before flashing)

[sevstels]

The catastrophic heating up of the oven during programming is a bug in the program. The author does not make the heating switch off before going into loading mode. This should be fix like this:

void IO_TurnOff_FAN_Heater(void)
{
IODIR0 = (1 << 8) | (1 << 9);
IOSET0 = (1 << 8) | (1 << 9);
}

`int main(void)
{
char buf[22];
int len;

IO_Init();
IO_TurnOff_FAN_Heater();

IO_JumpBootloader();

PLL_Init();
VIC_Init();
......
`

Similarly, the display does not work correctly, because the author did not calculate the time duration of the control pulses of the display control protocol. You can ask for the correct firmware > here