ChibiOS Free Embedded RTOS

Thank you for the quick reply!

No, I don't think it is from AC coupling noise.

I ran the STM32Cube example "Audio_playback_and_record", which is basically an OTG host based device, reading from a memory thumb drive "audio_sample.wav", without any noise, very clean. This is a bare-metal application ...

Hello,

I understand this is an older thread, I have migrated this project to Chibi20.3 on stm32f4 discovery board I have. I've connected MCLK to ITR of TIM2 using a jumper wire for samplerate feedback, as discussed in earlier posts.

On building and running, I am able to get usb audio device ...

Thank you, that worked for me.

chSysInit() is the case when RT is built, calls chSysEnable() which will then enable interrupts globally.

For os-less, since chSysInit() is out of the picture, osalSysEnable() was needed to be called after halInit() which enables the global interrupts.

Hello All,

Following is my setup:
ChibiOS 18.2.0: os-less
Board: Nucleo144-STM32L496ZG
SYSCLOCK: 80MHz, HSE is enabled, 16MHz Crystal.

Osal tick frequency:
#define OSAL_ST_FREQUENCY 1000

On creating an os-less project, I am unable to get SysTick interrupts. I checked the core peripheral registers ...

Hi,

I have attached the patch with HAL_RTC_LLD test example also. Please download this updated patch and experiment. It includes the drivers and the examples.

Test application locations:
1) HAL_SERIAL_LLD : $(CHIBIOS)/demos/various/RT-Posix-Simulator
2) HAL_CAN_LLD : $(CHIBIOS)/testhal/simulator ...

Faisal has explained the overview well. Thanks

I have added following example projects with README that explains usage scenarios:

1) HAL_SERIAL_LLD : $(CHIBIOS)/demos/various/RT-Posix-Simulator
2) HAL_CAN_LLD : $(CHIBIOS)/testhal/simulator/posix/CAN
3) HAL_UART_LLD : $(CHIBIOS)/testhal/simulator ...

Hello,

We have developed/modified a few lld drivers to use in simulator posix environment taking inspiration from STM32:
1) HAL_CAN_LLD (Uses SocketCAN)
2) HAL_SERIAL_LLD (added TTY/PTS support)
3) HAL_UART_LLD (uses TTY/PTS)
4) HAL_RTC_LLD

Also added a "simulator_registry.h" for these peripherals ...

Hi All,

I have a memory pool object and associated object memory aligned to stkalign_t as well as another pool and associated object memory without any alignment.

On looking at the source code of ChibiOS, I see chPoolAdd() is called by chPoolLoadArray() on loading both above pools after their ...

Hi All,

We are working on writing external device drivers for certain Accelerometers/Gyros and Magnetometers using the abstract peripheral interface. While going through the design pattern(object oriented C having virtual function implementations), I found a potential flaw in the design pattern ...