MPC5xxx中的主题 How to enable LIN mode of MPC5748G?

How to enable LIN mode of MPC5748G?

H-chips — Thu, 19 Sep 2024 08:43:54 GMT

I need to do LIN development on MPC5748G, but after setting the INIT bit of LINFlexDx_LINCR1 register to 1 (set into initialization mode), I continue to set the UART bit of LINFlexDx_UARTCR register to 0 to enter LIN mode. It goes straight into the Machine Check Interrupt. What's going on here?

Re: How to enable LIN mode of MPC5748G?

PetrS — Thu, 19 Sep 2024 11:28:43 GMT

Hi,

be sure module is clocked and wait for INIT mode to be entered.
Some example is posted at https://community.nxp.com/t5/MPC5xxx-Knowledge-Base/Example-MPC5748G-LINFlex-LIN-Master-Slave-test-GHS616/ta-p/1117197

BR, Petr

Re: How to enable LIN mode of MPC5748G?

H-chips — Fri, 20 Sep 2024 01:38:03 GMT

Hello, May I ask if using LIN is an operation that must write registers? Is there any library function for these operations?

Re: How to enable LIN mode of MPC5748G?

H-chips — Fri, 20 Sep 2024 02:00:52 GMT

Hello, thank you for your answer, but I set my registers according to the initialization operation (LINFlexD_1_Init) in the example program in the link you sent, but after this sentence (LINFlexD_1.LINCR2.R = 0x4000), I still entered the error interrupt. What's going on here?

Re: How to enable LIN mode of MPC5748G?

PetrS — Fri, 20 Sep 2024 11:49:27 GMT

Hi,

I do not see reason for this, check if right address is accessed.
There is no SDK driver for LIN, MCAL driver would include LIN driver however;
https://www.nxp.com/design/design-center/software/automotive-software-and-tools/autosar/autosar-4-0-x-classic-platform-software:AUTOSAR-4

BR, Petr

Re: How to enable LIN mode of MPC5748G?

H-chips — Mon, 23 Sep 2024 01:07:43 GMT

Ok, thank you very much for your answer. I will continue to study it.