[ell-i-developers] Re: Could someone please test this on a real STM32F334?

  • From: Ivan Raul <supra.material@xxxxxxxxx>
  • To: "ell-i-developers@xxxxxxxxxxxxx" <ell-i-developers@xxxxxxxxxxxxx>
  • Date: Sat, 13 Sep 2014 17:46:25 +0200

The same condition of not needing copying the _estack variable to the sp
register applies to stm32f4discovery.

The stack pointer is identical without the instruction.

With Warm Regards, Ivan Raul

On Sat, Sep 13, 2014 at 5:33 PM, Ivan Raul <supra.material@xxxxxxxxx> wrote:

> Hi to all,
>
> To flash the nucleo the first thing is to install the latest version of
> texane/stlink, it already has Lari's addition merged, it works smoothly!
>
> mkdir texane
> cd texane
> git clone https://github.com/texane/stlink.git
> cd stlink/
> ./autogen.sh
> ./configure
> make
> sudo make install
>
> Now, to flash, the .bin file is the one used (I lost some time trying to
> make it work by flashing the .hex ...)
> st-flash write sketch.bin 0x8000000
> #if it complains about " WARN src/stlink-usb.c: Error -3 opening
> ST-Link/V2 device ...", run it with sudo
> sudo st-flash write sketch.bin 0x8000000
>
> In order to see the green LED blink, it is necessary to configure pin 13:
> -----------------------
> #include <Arduino.h>
>
> void setup() {
>   pinMode(13, OUTPUT);
> }
>
> void loop() {
>   digitalWrite(13, 1);
>   for (volatile int i = 0; i < 100000; i++)
>      ;
>   digitalWrite(13, 0);
>   for (volatile int i = 0; i < 100000; i++)
>      ;
> }
> ------------------
>
> Additionally, if you want to debug a little and see how the program
> executes:
>
> sudo st-util
>
> Then, it will show the port " Listening at *:4242..."
> now, open gdb with the elf file as input
>
> arm-none-eabi-gdb sketch
>
> Now, in the debug command line "(gdb)"
>
> target remote localhost:4242
>
> It will show that it is halted in the first instruction of the reset
> handler, for me shows:
> Reset_Handler () at
> Runtime/stm32/build/../system/stm32/src/startup_stm32f334xx.c:287
> 287        __asm__ volatile ("mov    sp, %0" : : "r" (stack));
>
> You can play to step to the next instruction
>
> step
>
> Or continue the execution
>
> continue
>
> If you command continue, it will run normally and you will notice the LED
> blinking
> To halt the execution after continue, press the classic
>
> Ctrl+C
>
> You can check the registers:
>
> info reg
>
> Or check the information at certain address, for example:
>
> (gdb) x 0x0
> 0x0:    0x20003000
> (gdb) x 0x8000000
> 0x8000000 <g_pfnVectors>:    0x20003000
>
> What happens here is that the first section of flash is also mapped to the
> address 0x00000000, to enable the initialization to find the vectors at the
> very beginning of the memory. What is shown there is the initial value of
> the stack pointer.
>
> --------------------------------------
>
> Regarding the initialisation procedure, I checked removing the copying of
> the linker _estack provided variable to the stack. It is not necessary, the
> stack pointer is initalised from the init vectors (at least with the
> st32f334). The stack pointer is identical without the imperative assignment:
>
> With copying:
> sp             0x20002ff0    0x20002ff0
> lr             0x8000197    134218135
>
> Without copying
> sp             0x20002ff0    0x20002ff0
> lr             0x8000197    134218135
>
> -------------------------------------
>
> BR, Ivan
>
>
>
>
>
> With Warm Regards, Ivan Raul
>
> On Fri, Sep 12, 2014 at 7:49 PM, Pekka Nikander <pekka.nikander@xxxxxx>
> wrote:
>
>>   cd /tmp
>>   git clone https://github.com/supramaterial/Runtime
>>   cd Runtime/stm32/build
>>   make sketch.cpp
>>   # edit sketch.cpp to blink a led; see below
>>   make
>>
>> That creates hardware/stm32f334nucleo/sketch.{hex,bin}
>>
>> How to flash that to the STM32F334nucleo, I don't know exactly.  Lari
>> knows, he's done that.
>>
>> Here is a simple sketch for a LED in pin #3
>>
>> -----------------------
>> #include <Arduino.h>
>>
>> void setup() {
>>   pinMode(3, OUTPUT);
>> }
>>
>> void loop() {
>>   digitalWrite(3, 1);
>>   for (volatile int i = 0; i < 10000; i++)
>>      ;
>>   digitalWrite(3, 0);
>>   for (volatile int i = 0; i < 10000; i++)
>>      ;
>> }
>> ------------------
>>
>> YMMV.
>>
>> --Pekka
>>
>>
>> On 2014–09–12, at 20:30 , otso@xxxxxxxxxxxx wrote:
>>
>> > I have some time over weekend as well as the hardware, please send me
>> the
>> > details of what has to be tested and how "works" is defined. I'll test
>> it
>> > if I get more pressing issues with the hardware in order.
>> >
>> > -otso
>> >
>> >> Could someone please test this on a real STM32F334?  If it works, I'll
>> >> merge it.
>> >>
>> >> --Pekka
>> >>
>> >> Begin forwarded message:
>> >>
>> >>> From: supramaterial <notifications@xxxxxxxxxx>
>> >>> Subject: [Runtime] Added support for STM32F334 emulator (#24)
>> >>> Date: 11 Sep 2014 1:05:12 GMT+3
>> >>> To: Ell-i/Runtime <Runtime@xxxxxxxxxxxxxxxxxx>
>> >>> Reply-To: Ell-i/Runtime
>> >>> <
>> reply+i-42466605-35e7ed84685e7220999a32a51c47bf889c73a76d-681239@xxxxxxxxxxxxxxxx
>> >
>> >>>
>> >>> Please, test on real hardware, I just tested in the emulator.
>> >>>
>> >>> You can merge this Pull Request by running
>> >>>
>> >>>  git pull https://github.com/supramaterial/Runtime master
>> >>> Or view, comment on, or merge it at:
>> >>>
>> >>>  https://github.com/Ell-i/Runtime/pull/24
>> >>>
>> >>> Commit Summary
>> >>>
>> >>> Add: C initialisation and headers for STM32F334
>> >>> Add: Emulator SCB support for STM32F334
>> >>> Add: Compile flags for emulator shared library for STM32F334
>> >>> File Changes
>> >>>
>> >>> M stm32/emulator/inc/SCB.h (2)
>> >>> M stm32/make/emulator.mk (5)
>> >>> M stm32/make/system_lib.mk (2)
>> >>> A stm32/system/stm32/inc/system_stm32f3xx.h (76)
>> >>> D stm32/system/stm32/src/startup_stm32f334x8.S (421)
>> >>> A stm32/system/stm32/src/startup_stm32f334xx.c (328)
>> >>> Patch Links:
>> >>>
>> >>> https://github.com/Ell-i/Runtime/pull/24.patch
>> >>> https://github.com/Ell-i/Runtime/pull/24.diff
>> >>> —
>> >>> Reply to this email directly or view it on GitHub.
>> >>>
>> >>
>> >>
>> >
>> >
>>
>>
>

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