Can't run debugger - It was working
I have more information. First I was able to confirm JackN’s observation that an improper break point will stop the debug. In this case I put a breakpoint on a comment line and debug fails. Removing that breakpoint allowed success on the Nucleo board. At this point I can debug the Nucleo board but not the L476_Discovery Board.
I got the debug log from OpenOCD and this is the important error:
Debug: 256 29 stlink_usb.c:1602 stlink_usb_open(): stlink_usb_open
Debug: 257 29 stlink_usb.c:1619 stlink_usb_open(): transport: 1 vid: 0x0483 pid: 0x374b serial:
Error: 258 270 stlink_usb.c:1632 stlink_usb_open(): open failed
Debug: 259 270 hla_layout.c:49 hl_layout_open(): failed
Debug: 260 270 command.c:628 run_command(): Command failed with error code -4
User : 261 270 command.c:689 command_run_line(): in procedure ‘init’
in procedure ‘ocd_bouncer’
Device manager sees the programming device like this:
USB\VID_0483&PID_3748
Is it significant that OpenOCD thinks the PID is 0x374B and Device Manager thinks PID is 0x3748? B versus 8?
I should also say this is 64bit Windows 7 on a Dell Latitude laptop. STM ST-Link Utility loads the L476 fine.
Can anyone suggest further troubleshooting?
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