Why I can not erasing the flash ?

RE: Why I can not erasing the flash ?

ligang — Thu, 15 Dec 2016 03:58:01 GMT

Suggestion: I think that NORDIC need give one or two example in nRF51_RM_v3.0.1.pdf.

RE: Why I can not erasing the flash ?

ligang — Thu, 15 Dec 2016 01:24:49 GMT

The answer is :ERASEPAGE for example page 10 ,it will be 10*1024=10240, NOT 10.

RE: Why I can not erasing the flash ?

ligang — Thu, 15 Dec 2016 01:19:28 GMT

Now, I want to erase the other flash , for example no. 254 pages. It is almost at 0x3F800UL. I can write data at this point, and reset ,or re power on the device , I can read the data at the point flash. but, I can not erasing the flash at the point, now I must use the nRFgo Studio to erase all. and we can write some data to the point in flash (0x3F800UL)

RE: Why I can not erasing the flash ?

Sigurd — Wed, 14 Dec 2016 08:32:21 GMT

Hi,

The FICR registers are pre-programmed in factory and cannot be erased by the user. These registers contain chip-specific information and configuration.

RE: Why I can not erasing the flash ?

ligang — Wed, 14 Dec 2016 07:54:30 GMT

So, I think that whether nordic not provide the whole register to the developer. That's true reason I can not erasing the flash page.

RE: Why I can not erasing the flash ?

ligang — Wed, 14 Dec 2016 07:15:40 GMT

7.4 Register Details Table 14: CODEPAGESIZE Bit number 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Id A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Id RW Field Value Id Value Description A R CODEPAGESIZE Code memory page size Table 15: CODESIZE Bit number 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Id A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Id RW Field Value Id Value Description A R CODESIZE Code memory size in number of pages Total code space is: CODEPAGESIZE * CODESIZE Table 16: I read the FICR ,and know that CODEPAGESIZE is 1024 CODESIZE is 256