How to use specifically to Cortex-M4 on DK2

[Wjian.1]

I need to develop M4 and how do I configure system resources,for example,we need to configure uart on M4,the modification as follows,but it doesn't work:

&m4_rproc {
     m4_system_resources {
         status = "okay";
     };
 };
 &m4_uart3{
     status = "okay";
 };

[Olivier GALLIEN]

Hi @Wjian.1​ 

Did you already refer to wiki user guide ?

https://wiki.st.com/stm32mpu/wiki/How_to_configure_system_resources#ADC_example

https://wiki.st.com/stm32mpu/wiki/Serial_TTY_device_tree_configuration

https://wiki.st.com/stm32mpu/wiki/USART_internal_peripheral

Note that MP1 has an usart3 not uart3 device.

STM32CubeMX can also help you to assigned and configure properly usart3 to M4

Hope it help

Olivier

[Wjian.1]

Hi:

So thanks!Thanks to your help, it works very well now.By the way,the channel data location is not part of the InterProcessor communication controller and is stored in shared memory.So how much Shared memory is there when the data is transferred with IPCC.