DRA821U: Is it easy to develop PCIe interface?

Hi Feng Dong,

Our expert is currently out of office on holiday, please expect a delay in response until next week.

Best,
Jared

Hi Feng,

PCIe is one of the relatively complex interfaces on the SoC (that is, compared to McSPI or I2C).

If you are planning to develop everything from scratch since you are using an OS that does not have the PCIe driver, which means you will need to develop SERDES PHY driver, PCIe core driver, and PCIe device driver, then it will not be easy. If you are planning to use Linux, where the SERDES driver and PCIe core drivers exist, then it will be relatively easier. 

If the plan is to configure DRA821 as a PCIe EP device using Linux, please reference this example EP device driver: https://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-j7200/10_00_07_03/exports/docs/linux/Foundational_Components/Kernel/Kernel_Drivers/PCIe/PCIe_End_Point.html

If the plan is to develop a PCIe driver for a EP device that you are planning to plug in to the DRA821 configured as RC device using Linux, please reference this documentation: https://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-j7200/10_00_07_03/exports/docs/linux/Foundational_Components/Kernel/Kernel_Drivers/PCIe/PCIe_Root_Complex.html. 

Regards,

Takuma