Simulating LIN To GND for LIN bootloader, S12 MagniV

sarvraj_5 — Thu, 27 Sep 2018 13:09:50 GMT

Following the serial bootloader for S12ZVL32 , MagniV family, flowdiagram, we integrated the Lin stack to implement the bootloader using LIN.

To the outside world the board has just 3 pins, LIN, VDD, GND. So From application to enter into boot mode we are simulating a LIN to GND(short circuiting the 2 pins) in the dispatcher code.

We put a watch on registers LP0DR etc.. from LIN PHY, but none of the registers seem to change their value.

Is it related to over current?

Is there a way to detect Lin to Gnd. ?

Thanks

Re: Simulating LIN To GND for LIN bootloader, S12 MagniV

danielmartynek — Thu, 04 Oct 2018 13:47:06 GMT

Hi,

I have just tried detecting the dominant state (short LIN <-> GND) on DEVKIT S12ZVL32 by reading LP0DR_LPDR0 and it works, LPDR0 = 0. Is the LIN PHY enabled?

Regards,

Daniel

S12 / MagniV MicrocontrollersのトピックRe: Simulating LIN To GND for LIN bootloader, S12 MagniV

Simulating LIN To GND for LIN bootloader, S12 MagniV

Re: Simulating LIN To GND for LIN bootloader, S12 MagniV