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.
Solved! Go to Solution.
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,
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.