the flahx of k60 read fail some times

[yangzhenshang]

the flahx of k60 read fail some times,cannot run out of read()function ;and,eVen can not read by J-link8（see attachment）,but,when erase full chip,all is OK,why?,the chip is  broken?

[mjbcswitzerland]

Hello

This effect is common when software has written to a Flash area more than once. Eg. A value in the Flash is not 0xffffffff but SW programs it again.

The software making the error could be embedded code incorrectly writing to Flash or it could be a debugger incorrectly programming an address more than once.

A chip erase recovers the Flash area.

The Flash/chip is therefore (probably) OK but you will need to find out what is writing the memory incorrectly.

Regards

Mark

Kinetis: µTasker Kinetis support

K60: µTasker Kinetis TWR-K60N512 support  / µTasker Kinetis TWR-K60D100M support  / µTasker Kinetis TWR-K60F120M support

For the complete "out-of-the-box" Kinetis experience and faster time to market

[yangzhenshang]

I think  MQX write and read functions  have congirm all that, and how can I find out the "software making"?"thks.

[yangzhenshang]

Flash clock is 20MHz .divider is 6,now one chip broken down again ,can not write flash data second time ,first time  OK.

[yangzhenshang]

目前情况这样：

1、我分两次写入相邻的两块flash区域（连续地址0x7fe00-0x7ffff），每次写入29字节，第一次写入正常，第二次写入时候提示出错；但是写入字节数更改16字节，两次写入都正常；

2、考虑可能太靠近0x80000地址，我把写入地址更改为0x7f100，两次分别写入相邻的地址，每次写入29字节，第二次依然写入失败，通过JTAG看memory只写入了前5个字节；

3、把两次写入地址间隔开，即第一次写入地址0x7f100，第二次写入地址0x7f300，每次写入29字节，两次写入都正常；

MQX版本是4.1.2，如果更改MQX新版本的话改动太大，一时半会实现不了，请求继续分析，谢谢。

[Hui_Ma]

Hi,

The MQX Flash write operation calls  Program Phrase command, which requires Flash address 8 bytes align.

So, it need the program byte number be integer times of 8.

Wish it helps.

Have a great day,
Ma Hui

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[yangzhenshang]

But, why that is OK when Chang the  address ,and why the fitst time is OK?

[Hui_Ma]

If the issue was fixed with the latest MQX V4.2 flash driver?

Please let us know if the issue still there. Thanks.

Have a great day,
Ma Hui

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[yangzhenshang]

I just changed the address，could you have a try with MQX4.2？  thanks。

[Hui_Ma]

Hi,

I had tried MQX V4.2 Flash driver with TWR-K70F120M without any problem.

Have a great day,
Ma Hui

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[Hui_Ma]

Hi,

Could you check the Flash address 0x40C's value?

I am concerning the Kinetis chip was secured and it could not be read out from the JTAG interface.

Please let me know if there still with the same issue.

Have a great day,
Ma Hui

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[egoodii]

Can you also confirm your flash-clock divider for us?

[yangzhenshang]

Hi，

Data can read out from the JTAG interface（see attachment），but “memory read fail（0x0007FFE0）”，Now I erase the full chip，all is ok。

why， I worry about all this， maybe that will broke down again。

Also J-link can erase sections and program。

[egoodii]

What is the mask-version text on the part?

[yangzhenshang]

mask-version text is：

MK60FX512VLQ15

3N96B

QCTAG1430L

[yangzhenshang]

mask-version text is：

MK60FX512VLQ15

3N96B

QCTAG1430L