data exchange OpenAMP_TTY_echo

[IYetk]

Hello,

I am reimplementing the example application OpenAMP_TTY_echo in STM32MP157C-DK2.

I want to exchange numerical data between M4 and dual A7.

How can I do it ? which structure, channel or interface ?

thanks in advance

[Olivier GALLIEN]

Hi @IYetk​ 

Usage of Virt_Uart interface as in OpenAMP_TTY_echo exemple does not prevent to exchange numerical data.

Could you please elaborate further your concern ?

Olivier

[IYetk]

I want to read 3 numerical values (temp,humidity,pressure) from bosch sensor BME280 on the M4 side and send them to A7 side periodically for example every 0.5 second. Then i will print them out to the screen via a QT application on A7 side. User (me) will watch these data on the screen and will be able to send on/off command (0/1) via QT application on A7 for a 5v vantilator which is controlled by M4. M4 will receive this command and turn it on/off.

[Olivier GALLIEN · Accepted solution]

Hi @IYetk​ 

Thanks for sharing project details. Very interesting.

I confirm OpenAMP_TTY_echo is the good starting point to set A7/M4 communication channel as you which.

Formating 3 numerical values into string and send it with VIRT_UART_Transmit on periodical time might be straight forward.

Olivier

[IYetk]

thank you, I see.

Halil