S32R274 flash

[iceice]

请问S32R274的嵌入式flash控制模块中 C55FMC_ADR 寄存器的ADDR位怎么计算的，

iceice_0-1642143263247.png

手册中说ADDR的23~3位是偏移地址，但是在C55FMC_ADR中8~28位是ADDR只有21位，这是怎么转换的。

我读出寄存器值为0x80c0000，对应的偏移地址是多少呢

[lukaszadrapa]

Hi,

please take a look at this file attached inside the reference manual:

lukaszadrapa_0-1642437214429.png

See the "NVM" tab in the file. Last two columns are important - it says which partition (space) it is and what is the block size.

If you can see 0x080C_0000 in the register, it means that 'a256k' is set. So, the base address of 256k blocks is 0x0100_0000:

lukaszadrapa_1-1642437404037.png

You can check by your debugger address at 0x0100_0000 + 0xC_0000 = 0x010C_0000.

Regards,

Lukas

[iceice]

请问如果出现flash错误，ECC错误状态是在什么时候置位的

[lukaszadrapa]

Hi,

ECC error is reported when you access such corrupted area. This application note could be helpful (S32R274 also belongs to MPC57xx family of devices):

https://www.nxp.com/docs/en/application-note/AN13179.pdf

https://www.nxp.com/docs/en/application-note-software/AN13179SW.zip

Regards,

Lukas

[iceice]

请问都有什么异常会进入IVOR1