[Arm-netbook] stress! and working with libopencm3, stm32sprog and an STM32F103

[Ken Phillis Jr]

Isn't it possible to use an embedded real time OS on the STM32F make things
easier? I know that ChibiOS/RT [1] is under GPLv3 and that the BSD option
is nuttX [2].

[1] http://en.wikipedia.org/wiki/ChibiOS/RT
[2] http://en.wikipedia.org/wiki/NuttX




On Sat, Oct 19, 2013 at 6:10 PM, luke.leighton <luke.leighton at gmail.com>wrote:

> well.  there is a particular issue with stm32sprog which has massively
> hindered progress over the past few weeks.  it's very simple: when
> uploading and running a program using stm32sprog, if it has interrupt
> service routines it is guaranteed to crash.  however if you then set
> BOOT0 to 0 and do a RESET, the program will work absolutely fine
> [assuming it's coded correctly]
>
> this simple little thing has prevented progress over the past couple
> of weeks because it has been impossible to distinguish "code
> incorrectly written" from "code that crashed due to stm32sprog".
>
> dozens of examples and bits of code that _should_ have worked - DMA,
> ADC, DAC, Timers - will and can now all be revisited.
>
> patience, patience...
>
> ... anyway i'm currently tracking how to get timers to update from an
> external gpio pin, and from there to fire DMA.  it _is_ possible...
> just.... requires a huge amount of careful reading and research just
> to come up with only 30 lines of code that connect all the dots
> together without connecting any of the thousands of other options.
>
> i think... to be absolutely honest, if i had known that the STM32F was
> so comprehensive / complex i would have said "sod it" and used a
> low-cost FPGA instead.  but, hey, this is kinda hair-raisingly fun....
>
> l.
>
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