Problem with OpenAmp_ping pong

[HamidGolbari]

Dear Support team,

I am using this STM32H755 as a motor control application. 

I have developed motor control algorithm on M4 and the communication with Master through SPI using M7.

I need to exchange data between M4 and M7 continuously. I tried with OpenAmp_PingPong example. It works fine but it works just one time at the beginning of the program or depends on this while loop

while (message < 100)

{

message = receive_message();

message++;

status = OPENAMP_send(&rp_endpoint, &message, sizeof(message));

if (status < 0)

{

Error_Handler();

}

}

I need the send and receive are done continuously. For example I would like to have some thing like this

void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) {

if (htim->Instance == TIM17) {

HAL_HSEM_FastTake(HSEM_ID_0);//Take HSEM

status = OPENAMP_send(&rp_endpoint, &message, sizeof(message));

//message++;

if (status < 0)

{

Error_Handler();

}

HAL_HSEM_Release(HSEM_ID_0, 0);//Release HSEM in order to notify the CPU2(CM4)

// Handle Timer 1 period elapsed event

// This code will execute when the period of Timer 1 elapses

}

}

In which the data is being sent in a timer or in an infinite loop.

I tried a lot with this but I could not. because both cores stopped working when I am doing this.

I also put the receive the receive message function on M4 side in this interrupt:

void HAL_HSEM_FreeCallback(uint32_t SemMask)

{

/* USER CODE BEGIN HSEM_FREE_CALLBACK */

receive_message();

/* USER CODE END HSEM_FREE_CALLBACK */

/* Prevent unused argument(s) compilation warning */

UNUSED(SemMask);

msg_received = RX_NEW_MSG;

#ifdef CORE_CM7

/* USER CODE BEGIN PRE_HSEM_FREE_CALLBACK_CM7 */

/* USER CODE END PRE_HSEM_FREE_CALLBACK_CM7 */

HAL_HSEM_ActivateNotification(__HAL_HSEM_SEMID_TO_MASK(HSEM_ID_1));

/* USER CODE BEGIN POST_HSEM_FREE_CALLBACK_CM7 */

/* USER CODE END POST_HSEM_FREE_CALLBACK_CM7 */

#endif

#ifdef CORE_CM4

/* USER CODE BEGIN PRE_HSEM_FREE_CALLBACK_CM4 */

/* USER CODE END PRE_HSEM_FREE_CALLBACK_CM4 */

HAL_HSEM_ActivateNotification(__HAL_HSEM_SEMID_TO_MASK(HSEM_ID_0));

/* USER CODE BEGIN POST_HSEM_FREE_CALLBACK_CM4 */

/* USER CODE END POST_HSEM_FREE_CALLBACK_CM4 */

#endif

}

I should clarify that I do not want to use FreeRTOS. Would it be possible to help me?

Best regards,

Hamidreza

[FBL]

Hello @HamidGolbari 

I don't think this is the best approach to manage mailbox with IPCC peripheral using HAL_HSEM_FastTake and Release. You better use HAL_HSEM_FreeCallback or is_rpmsg_ept_ready.

The RPMsg service is implemented by the OpenAMP library. The Mailbox service is implemented by the HAL_IPCC driver. Pay attention to timings while debugging dual core. 

[HamidGolbari]

@FBL Thank you so much for your consideration. Would it be possible if you could provide me with a simple example in which data is being sent and received between two cores continuously?

Thanks again.

[HamidGolbari]

I tested this library and it is functional.

https://github.com/adailtonjn68/STM32H7xx_inter-core_data_share