Kinetis MicrocontrollersのトピックRe: K70 LCD hangs - HELP!!

K70 LCD hangs - HELP!!

asmith — Fri, 20 Apr 2012 03:37:41 GMT

I am trying to get a minimal LCD implimentation up in our bootloader code - whihc is derived from a freescale bootloader

I have tried the kinetis_sc example and after spending a day getting ti to build in CW`10.2 it fails in exactly the same way as my own attempt.

We already have the LCD working fine - inside and MQX application.

But when the same code is moved into a standalone application it hangs when it writes to the LCDC_LGWCR or LCDC_LDCR registers.

I am assuming that this means something associated with DMA fromt he LCDC to the panel is fubar.

Any clue what I need to look for ?

I have been scouring the MQX BSP and truing on every vaguely LCD or DMA related clock I can find - no joy.

mjbcswitzerland — Fri, 20 Apr 2012 05:56:15 GMT

Have you enabled the LCD controller in SIM_SCGC3? (Bit 22)

Regards

Mark

asmith — Fri, 20 Apr 2012 10:37:22 GMT

SIM_SCGC3 |= SIM_SCGC3_LCDC_MASK;

One of the first things.

The code I am using tracks very strongly against the kinetis_sc/projects/ldcd_rev2 project.

Except:

Our SPI is SPI0

Our SPI programming is different,

Our LCD is different resolution.

Further the same setup code works inside MQX.

hl — Fri, 22 Feb 2013 14:15:14 GMT

I fear, I have the same problem.

Have you solved the problem in the meantime?

Is it a problem of the mask (I am using 0N96)?

Regards