MPC5xxxのトピックLIN implementation

LIN implementation

akhilk234 — Sat, 28 Nov 2020 11:06:52 GMT

I am trying to implement LIN driver for MPC5777C-DEVB. I'm able to transmit the complete LIN frame but I'm also receiving random data if I clear the eSCI_IFSR2_TXRDY register before updating the eSCI_LTR register. If I don't clear the eSCI_IFSR2_TXRDY register before updating the eSCI_LTR register then I'm getting complete LIN frame and in-between LIN frames I'm receiving PID field and data frames in sci data format. How can I avoid these unwanted messages in between LIN frames. These CRO snap shots I'm attaching. And all esci registers screen shot I'm attaching.

Re: LIN implementation

PetrS — Mon, 30 Nov 2020 12:24:46 GMT

Hi,

what is the code you have? And what LIN slave is connected?

Attached is very simple code showing LIN TX and RX operation.

BR, Petr

Re: LIN implementation

akhilk234 — Thu, 03 Dec 2020 04:52:54 GMT

I didn't connected any slave and I am observing on CRO and Kvaser Leaf Professional LIN. I haven't updated CSE bit that's why I received 2 LIN Frames. Now I'm getting proper LIN Frame.

But I want to use MPC5777C in LIN Slave mode. How can I uses this board in LIN Slave mode? What are the registers should I update to put this board in LIN Slave mode?