topic Re: MBD for MPC5744P programmer in Model-Based Design Toolbox (MBDT)

MBD for MPC5744P programmer

13226508 — Mon, 18 Mar 2019 05:09:42 GMT

Hi，

I have already able to programm the MPC5744P for the example GPO.slx, when I use the Onboard programmer (J12 mini USB),the LED could work as well .But when I use the USB to serial port(TTL level),I can not programm correctly. Can you please tell me what is the issue here.

PS: I have matched the corresponding serial port and baud rate(com11 and 115200),

The serial port tools can be transmitting and receiving correctly.

Regards,

Re: MBD for MPC5744P programmer

mariuslucianand — Mon, 18 Mar 2019 15:11:57 GMT

Hello 13226508@qq.com‌,

Well, is strange if the data transmission works using your external USB to Serial after the elf started to run, but on the bootloader is not ok. Normally, the serial connection is point to point so in any case, adding another usb to serial on the same line should cause problems on the line.

To help you, I can propose another way, already discussed here: Why does the example model from MBDT not work?. If you have no constraints regarding the pins, you can use the LIN0(PB2 and PB3) instead LIN1. For that you simply flash on the board the MPC5744P.rbf file located in src\tools\BootLoader\RBF_Files, and use the PB2 and PB3 pins.

For more info please follow the thread mentioned.

Hope this helps,

Marius

Re: MBD for MPC5744P programmer

13226508 — Tue, 19 Mar 2019 03:23:22 GMT

Hello Marius,

Thank you for your reply,

My problem is similar with Why does the example model from MBDT not work? When I flash on the board the MPC5744P.rbf file , and use the PB2 and PB3 pins， but the openSDA and RS232 both can not work .When I flash MPC5744P_DEVKIT.rbf file, openSDA works fine ,but RS232 can not work all the same.what should I do？

Thank you previously.

Re: MBD for MPC5744P programmer

mariuslucianand — Tue, 19 Mar 2019 13:56:37 GMT

Hello 13226508@qq.com‌,

If I understand correctly, your current status is the following:

the MPC5744P_DEVKIT.rbf works on OpenSDA, LIN1, but not on PD9 PD12 using USBtoSerial.
the MPC5744P.rbf works on PB2 and PB3 pins using your USBtoSerial on LIN0

You want to use the USBtoSerial on PD9 and PD12 while the OpenSDA is running. I think there is a sort of interference between them and also on the RX and TX lines there are also level shifters so they can also cause problems in idle state or so.

Is my status right?

If you are planning in the future to create a custom board layout and use the MPC5744P if there is only a straight connection between rx and tx lines on LIN 1 between the controller and you USB to Serial it will work without problems.

Waiting for your response,

Marius

Re: MBD for MPC5744P programmer

13226508 — Mon, 25 Mar 2019 00:55:13 GMT

Hi Marius,

Thank you very much.. I am able to flash by using USB to Serial on PD9 PD12 . The problem is my serial tool .

Regards

YangJing