MPC5xxx中的主题 Standard fame mask setting (MPC5644C)

Standard fame mask setting (MPC5644C)

WUXIE — Tue, 06 Jun 2023 07:21:21 GMT

How to set the Standard frame mask When CAN initializatiion？I Set the Registers，But MASK Not work !

Re: Standard fame mask setting (MPC5644C)

PetrS — Tue, 06 Jun 2023 10:41:32 GMT

Hi,

how did you set registers and what is not working? Do you use global or individual mask scheme?
Mask registers can only be written in Freeze mode. The 11bit std mask is left shifted by 18bits in mask register.

BR, Petr

Re: Standard fame mask setting (MPC5644C)

WUXIE — Fri, 09 Jun 2023 09:12:45 GMT

Hello,

I use Individual mask，and setting in Freeze mode。

For example,Can Type registers Set as 0( Standard Frame ), MB ID set as 0x7FF,mask set as 0xFFFF。after Can initialization，The MCU not only Can receive 0x7FF Standard Frame，But also Can Receive Other Standard Frame( 0x 500)； So the mask Not Works。

Re: Standard fame mask setting (MPC5644C)

PetrS — Fri, 09 Jun 2023 13:12:58 GMT

can you share your code?

BR, Petr

Re: Standard fame mask setting (MPC5644C)

WUXIE — Tue, 13 Jun 2023 01:16:38 GMT

Hello ! Can You show me The Correct Codes，Thanks。

can1_map.BUF[i].CS.B.IDE = 0;
can1_map.BUF[i].ID.R = 0x7FF;
can1_map.RXIMR[i].R = 0xFFFF;

Re: Standard fame mask setting (MPC5644C)

PetrS — Tue, 13 Jun 2023 07:01:18 GMT

Hi,

note standard ID and mask are left-shifted by 18bits in MB's ID word and mask register, so correct setting is

can1_map.BUF[i].CS.B.IDE = 0;
can1_map.BUF[i].ID.R = 0x7FF<<18;
can1_map.RXIMR[i].R = 0x7FF<<18;

BR, Petr

Re: Standard fame mask setting (MPC5644C)

WUXIE — Sat, 09 Sep 2023 07:29:03 GMT

thanks a lot , Petr