[DONE] The New STM32F429/F439

[Giovanni]

There are more changes than expected thanks to the new header...

Giovanni

[Giovanni]

X Tectu

Very interesting, VGA output using the new discovery.

Giovanni

[Tectu]

Yep, that's indeed very interesting! Give me a working ChibiOS/RT on that board and I'll take care of the rest

~ Tectu

[Giovanni]

Well, the port is done and the demo compiles but OpenOCD 0.7.0 does not support the device yet so I am stuck, can anybody give it a try?

This is the OCD log:

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Open On-Chip Debugger 0.7.0-dev-00079-g08ddb19 (2012-11-12-17:14)
Licensed under GNU GPL v2
For bug reports, read
   http://openocd.sourceforge.net/doc/doxygen/bugs.html
adapter speed: 1000 kHz
Warn : Interface already configured, ignoring
Error: already specified stlink_layout usb
adapter speed: 1000 kHz
srst_only separate srst_nogate srst_open_drain
Info : clock speed 1000 kHz
Info : stm32f4x.cpu: hardware has 6 breakpoints, 4 watchpoints
Info : accepting 'gdb' connection from 3333
Info : device id = 0x10036419
Warn : Cannot identify target as a STM32 family.
Error: auto_probe failed
Error: Connect failed. Consider setting up a gdb-attach event for the target to prepare target for GDB connect, or use 'gdb_memory_map disable'.
Error: attempted 'gdb' connection rejected

Giovanni

[Tectu]

I just gave it a try and I don't have any issues to access the target MCU through OpenOCD 0.7.0

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openocd -f interface/stlink-v2.cfg -f target/stm32f4xx_stlink.cfg

I could compile and flash the demo without any problems. However, it keeps hanging here forever:

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while ((PWR->CSR & PWR_CSR_VOSRDY) == 0)

Looks like the voltage regulators never trigger the stable flag. Is it working for you, Giovanni?


~ Tectu

[Giovanni]

I have not been able to flash the code so I didn't reach that point yet. Tomorrow I will give it another try.

Giovanni

[Giovanni]

Just a note,

Apparently it is not possible to run the CPU at 180MHz and obtain a 48MHz clock for USB... at least I have been unable to find a solution for that, the demo has been setup for a 168MHz clock.

Giovanni

[Tectu]

I can try that later this night. Would I have to alter the PLL settings or is there some ready to use macro to set the frequency?


~ Tectu

[Giovanni]

It is all about the PLL settings in mcuconf.h. There is no combination that yields 48MHz for the OTG when running at 180MHz, very strange they didn't foresee this.

Alternatively, I am missing something very obvious...

Giovanni

[fractal]

I don't actually have a 429, but from what I read it seems the main PLL is unchanged from the 407 and similar. I can also not find a combination which would work, unless you can now increase the PLL clock to 720 MHz - in which case you could divide by 15 for USB and 4 for the CPU. There doesn't seem to be a macro yet.