topic MC9S08LG32 cannot change register value in Classic/Legacy CodeWarrior

MC9S08LG32 cannot change register value

navry — Sat, 14 Feb 2015 01:59:02 GMT

Hello everyone

I'm trayin setup SPI on MCU MC9S08LG16 and i cannot set any register from SPI registers. When i setting SPIC1 value to 0xD0 by code, nothing change. SPIC1 have 0x04 from begin program. When i traying change this value in debug mode in memory window or in register map, not work it. After hit on enter value stay on 0x04.

I use Codewarrior 6.1.

Please, can you help my anybody to explain this problem?

Thank you very much.

Re: MC9S08LG32 cannot change register value

Jorge_Gonzalez — Sat, 14 Feb 2015 02:58:11 GMT

Hello Michal Navratil:

Your question is in general space with very low visibility. Please move it to Classic/Legacy CodeWarrior to gain more attention.

About posting in the right place, check the next document by colleague Denisse: Where to post a Discussion?

Regards!

Jorge Gonzalez

Re: MC9S08LG32 cannot change register value

navry — Sat, 14 Feb 2015 03:02:56 GMT

Hi Jorge Gonzalez

Thanks for the warning. A did it now :smileyhappy:

Greeting

Michal Navratil

Re: MC9S08LG32 cannot change register value

Carlos_Mendoza — Tue, 24 Feb 2015 02:29:34 GMT

Hi Michal Navrátil,

Maybe the SPI registers cannot be set because the Bus clock to the SPI module was not enabled, please try to enable it with the next instruction and then try to set the SPI registers:

SCGC2_SPI =1; // This bit controls the clock gate to the SPI module

You can find more information about the System Clock Gating Control 2 Register (SCGC2) on the page 91 of the User Manual:

http://cache.freescale.com/files/microcontrollers/doc/ref_manual/MC9S08LG32RM.pdf

Hope it helps!

Best Regards,

Carlos Mendoza

Technical Support Engineer

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