Kinetis MicrocontrollersのトピックRe: k10d can

k10d can

aimeerd — Mon, 15 Jun 2015 01:12:35 GMT

hello, i am use k10dx256vlk7 with PE.In the program, some chips after carry this command "SIM_SCGC6 |= SIM_SCGC6_FLEXCAN0_MASK; ",the value of register "SIM_SCGC6" is not changed,and always "0x40000001",but some k10dx256vlk7 chips could changed the value,the normal value should be 0x40000011.In first case, CAN function can't use.

Re: k10d can

Hui_Ma — Tue, 16 Jun 2015 03:27:30 GMT

Hi,

Could you try use below code to check if SIM_SCGC6 register [FLEXCAN0] bit could be written or not?

SIM_SCGC6 |= SIM_SCGC6_FLEXCAN0_MASK;

Or you also could check using register debugger window to check this bit could be written or not.

Have a great day,
Ma Hui

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Re: k10d can

aimeerd — Wed, 17 Jun 2015 00:52:51 GMT

Yes,I have try to write SIM_SCGC6 register [FLEXCAN0] bit as you talk to me. But on some chips ,the bit value is not changed remain.

I guess the chips register (SIM_SCGC6 register [FLEXCAN0] bit) was locked at some where,but i can't find the lock bit.

Re: k10d can

Hui_Ma — Wed, 17 Jun 2015 07:15:52 GMT

I don't think there has lock mechanism to avoid customer using software code to modify the SIM_SCGC6 register.

Even the chip was locked, customer still could use software to modify that register.

How many chips with this problem(SIM_SCGC6 register [FLEXCAN0] bit could not be set)?

Have a great day,
Ma Hui

Re: k10d can

aimeerd — Wed, 17 Jun 2015 07:20:44 GMT

at least ten chips.

Re: k10d can

Hui_Ma — Thu, 18 Jun 2015 03:06:10 GMT

Hi,

I think customer could submit a CQI requirement to check what reason cause that bit could not be set.

Please contact with your local Freescale distributor to submit the CQI requirement (Product Analysis).

Wish it helps.

Have a great day,
Ma Hui