Power ManagementのトピックFS2400 CAN wake up

FS2400 CAN wake up

kk211911 — Thu, 10 Oct 2024 06:33:37 GMT

Hello, the fs2400 works as Debug mode. when i wake up it via CAN from LPOFF mode, can doesn't work. I tried to clear the CAN_WU_I flag following the data sheet, but it can not take effect. How to clear the CAN_WU_I flag?

After i dId power reset , CAN works.

Re: FS2400 CAN wake up

TomasVaverka — Thu, 10 Oct 2024 08:24:08 GMT

Hello Kun,

When the FS2400 is in Debug mode, the CAN transceiver is active regardless of the CAN_MODE[1:0] bits state of the M_CAN register.

To clear the CAN_WU_I flag, write 0 to bit 0 of the M_WU1_FLG register.

BRs, Tomas

回复： FS2400 CAN wake up

kk211911 — Thu, 10 Oct 2024 08:33:32 GMT

I have also tried write the whole reg to 0x0 and write CAN_WU_I bit to 0, the flag can not be cleared.

fs2400_write_register(&l_xDev, FS2400_REG_M_WU1_FLG, 0x0)

fs2400_write_bit(&l_xDev, FS2400_REG_M_WU1_FLG, FS2400_REG_M_WU1_FLG_CAN_WU_I, 0)

Any other registers should be re-init after a CAN wake-up pattern?