Search found 167 matches

by fpiSTM
Wed Sep 20, 2017 3:52 pm
Forum: STM32generic
Topic: B-L475E-IOT01A
Replies: 5
Views: 41

Re: B-L475E-IOT01A

Maybe this can help, check which instance is used: /* ADC Periph clock enable */ if(hadc->Instance == ADC1) { #ifdef __HAL_RCC_ADC1_CLK_ENABLE __HAL_RCC_ADC1_CLK_ENABLE(); #endif #ifdef __HAL_RCC_ADC12_CLK_ENABLE __HAL_RCC_ADC12_CLK_ENABLE(); #endif } #ifdef ADC2 else if(hadc->Instance == ADC2) { #i...
by fpiSTM
Wed Sep 20, 2017 8:19 am
Forum: PR's bugs and enhancements
Topic: PR to add optimisation menu (to all boards individually)
Replies: 24
Views: 446

Re: PR to add optimisation menu (to all boards individually)

I've tested on the BP with Arduino_STM32 repo.
without the fix, using O1 provide wrong value while with the fix it's ok.

Code: Select all

uint32_t __attribute__((optimize("Os"))) pulseIn( uint32_t pin, uint32_t state, uint32_t timeout )
of course with the 4.8.3 toolchain ;)
by fpiSTM
Tue Sep 19, 2017 2:40 pm
Forum: PR's bugs and enhancements
Topic: PR to add optimisation menu (to all boards individually)
Replies: 24
Views: 446

Re: PR to add optimisation menu (to all boards individually)

To conclude, by adding:

Code: Select all

uint32_t __attribute__((optimize("Os"))) pulseIn( uint32_t pin, uint32_t state, uint32_t timeout )
This will avoid any issue and allow to keep hardcoded clock cycle to 16 even if opt is changed.
by fpiSTM
Tue Sep 19, 2017 9:30 am
Forum: STM Core
Topic: pwm functions not working
Replies: 5
Views: 73

Re: pwm functions not working

the define for the L476 is here: https://github.com/stm32duino/Arduino_Core_STM32/blob/ac89c2d8d86d965099cf2e79c46b2de7bc1a2f0d/variants/NUCLEO_L476RG/variant.h#L120 So you have to go in the core installation folder: https://github.com/stm32duino/wiki/wiki/Where-are-sources and edit: variants/NUCLEO...
by fpiSTM
Tue Sep 19, 2017 7:02 am
Forum: STM Core
Topic: pwm functions not working
Replies: 5
Views: 73

Re: pwm functions not working

Currently, this core implement the Arduino API an so there is no API to do this.
PWM_FREQUENCY in variant.h could be changed at this time.
This is planned to add this function when the PWM (analog feature) will be enhanced
by fpiSTM
Tue Sep 19, 2017 4:35 am
Forum: STM Core
Topic: pwm functions not working
Replies: 5
Views: 73

Re: pwm functions not working

Hi, you should see: https://www.arduino.cc/en/Reference/AnalogWrite And do it on a pin which have PWM capability, see PeripheralPins.cpp in the Nucleo L476 variant folder: https://github.com/stm32duino/Arduino_Core_STM32/blob/master/variants/NUCLEO_L476RG/PeripheralPins.c#L111 So for example for the...
by fpiSTM
Tue Sep 19, 2017 4:22 am
Forum: PR's bugs and enhancements
Topic: PR to add optimisation menu (to all boards individually)
Replies: 24
Views: 446

Re: PR to add optimisation menu (to all boards individually)

I actually had hoped that you would say it's ok to use it :( I tried to use the DWT CYCNT for F103 but I do not succeed to write properly the DWT CTRL register. I think it locked by default (probably because I used STLink) so it required to be unlocked. I found this nice example and think I'm in th...
by fpiSTM
Tue Sep 19, 2017 4:12 am
Forum: PR's bugs and enhancements
Topic: PR to add optimisation menu (to all boards individually)
Replies: 24
Views: 446

Re: PR to add optimisation menu (to all boards individually)

I tried quickly yesterday and it seems to work, but I use the arm gcc v6, I do not test for v4.8 #pragma GCC push_options #pragma GCC optimize ("Os") your function #pragma GCC pop_options After check the gcc documentations, it should work for 4.8: https://gcc.gnu.org/onlinedocs/gcc-4.8.3/gcc/Functio...
by fpiSTM
Mon Sep 18, 2017 3:39 pm
Forum: PR's bugs and enhancements
Topic: PR to add optimisation menu (to all boards individually)
Replies: 24
Views: 446

Re: PR to add optimisation menu (to all boards individually)

Thanks Victor, I will check about the optimize. :)
About the DWT CYCCNT, I'm just stating the investigation and I think I will not use that as not supported by M0 family. And probably you're right about debugging effect.
by fpiSTM
Mon Sep 18, 2017 8:52 am
Forum: PR's bugs and enhancements
Topic: PR to add optimisation menu (to all boards individually)
Replies: 24
Views: 446

Re: PR to add optimisation menu (to all boards individually)

You could try to add this is the impacted function: __asm__("") This will tell to the compiler to not optimize the function. See https://gcc.gnu.org/onlinedocs/gcc-4.8.5/gcc/Function-Attributes.html#Function-Attributes noinline This function attribute prevents a function from being considered for in...