MPC5xxxのトピックRe: MPC5744P FLASH block

MPC5744P FLASH block

eautopower — Thu, 20 Jul 2017 06:44:53 GMT

look this program:

why the C55FMC.LOCK0.R = 0X00000200 is unlock mid block 0x00FB_8000 - 0x00FB_FFFF?

datasheet no any information.

Can you tell me how to choose the Flash block?

Re: MPC5744P FLASH block

davidtosenovjan — Thu, 20 Jul 2017 18:40:48 GMT

There is no such block there. Is this example really related to MPC5744P?

Re: MPC5744P FLASH block

eautopower — Fri, 21 Jul 2017 01:07:17 GMT

sorry,the example is MPC5748G,but i want to konw that how to choose the flash block for MPC5744P,like unlock.

How can the C55FMC.LOCK0 register be configured to unlock the corresponding block for MPC5744P?

Re: MPC5744P FLASH block

davidtosenovjan — Fri, 21 Jul 2017 06:44:54 GMT

By clearing of particular bit.

I am using this:

// unlock all blocks (for simplicity)
C55FMC.LOCK0.R = 0;
C55FMC.LOCK1.R = 0;
C55FMC.LOCK2.R = 0;
C55FMC.LOCK3.R = 0;

Re: MPC5744P FLASH block

eautopower — Fri, 21 Jul 2017 07:04:18 GMT

David:

I want to be able to erase the specified block, I know configure the LOCK register,but i don't know which register bit sets 0 can unlock corresponding the FLash block.

Re: MPC5744P FLASH block

davidtosenovjan — Fri, 21 Jul 2017 07:09:13 GMT

According screenshots above - Flash memory map shows addresses, partitions and block numbers. LOCK register description shows bit position of particular block.

Re: MPC5744P FLASH block

eautopower — Fri, 21 Jul 2017 07:25:53 GMT

David:

I still don't understand. Can you give me an example?

if i want ti unlock 0X00FA0000~0XFAFFFF,the C55FMC_LOCK0 which bit be set 0?why?