[ToDo] Possible bug with powerOn function in SSD1289 Driver

[xlh1460]

I found, on my board. that the "powerOn" control function would bring the display to like if it was in "powerSleep" but not "powerOff".

I checked the data sheet for the chip and it appears, according to my interpretation, that the powerOn function should be written as:

			case powerOn:
				acquire_bus(g);
				write_reg(g, 0x07, 0x0021);
				write_reg(g, 0x00, 0x0001);
				write_reg(g, 0x07, 0x0023);
				write_reg(g, 0x10, 0x0000);
				gfxSleepMilliseconds(30);
				write_reg(g, 0x07, 0x0033);
				release_bus(g);
				break;

Instead of the following existing code:

			case powerOn:
				acquire_bus(g);
				write_reg(g, 0x10, 0x0000);	// leave sleep mode
				write_reg(g, 0x00, 0x0001);	// turn on oscillator
				gfxSleepMicroseconds(5);
				release_bus(g);
				break;

[Joel Bodenmann]

Thank you very much for reporting this bug. I'll take a loot at this tonight.

~ Tectu

[Joel Bodenmann]

Hello,

I just took out my hardware and tried it out with the current code. I couldn't find any issue, everything seems to be working as expected.

Can you please describe the problem that you are facing a bit more detailed - probably include a test case code snipped? Probably I'm not understanding your problem correctly.

~ Tectu

[xlh1460]

if I call gdispSetPowerMode(powerOff), then call gdispSetPowerMode(powerOn), the display remains blank.

I have attached the program that I was testing.

main.zip

[Joel Bodenmann]

I'll get back to this soon.

~ Tectu