Hello.
I have got new MPC5777C-DEVB2 and would like to flash/debug it with build-it openSDA. But after I connect micro-usb cable, both reset LED (D79 and D80) are red, and no openSDA port appears in windows device manager. Drivers from PEmicro are installed, all switches/jumpers on board are in default state. What can be the problem?
Hello,
What comes to my mind is that you do not have SBC in debug mode. So your SBC SWT will trigger reset.
Make sure your SBC is generating voltage for the K20.
To me Quick start guide seems very poor quality where no HW supply possibilities are discussed. Unfortunately I do not have the board so I cant test it for you. I will try to find author of it and force him to post here.
Best regards,
Peter
Hello,
Do you have J45 populated?
Furthermore, do you see voltage on TP30?
Since your D14 is on, SBC must generated 3.3V output.
Check also J7:
the K20 is powered by USB by default. you can check the TP60
regarding the bootloader FW:
https://mcuoneclipse.com/2016/06/26/how-to-recover-the-opensda-v2-x-bootloader/
best regards,
Peter
All as you described.
JP45 is set, J7 is in 1-2 positions. There is 3.3V in P3V3_SDA (TP60) and SBC_P3V3 (TP30) circuits.
About firmware. There are big number of boards to select firmware, but no MPC5777C-DEVB2 among them. Which should be selected?
Yes, it looks like there is no firmware in MK20
Board revision is "C", if I understand right.
Yes, it's in reset.
Looks like MK20 does nothing, as reset is only when SW18 are in "on" state and there is a power supply for MK20 via USB_K20. D510 is also dead all the time, both in normal work and in MK20 bootload mode (when usb is connected with pressed SW4), though according to descriptions it should blink in bootload mode.
I assume, that MK20 was not flashed. If it's possible to do with CycloneMX, I can do it, but I need correct binary.
