PCIE MSIX IRQ EP

Table of Contents

• Introduction
• Supported Combinations
• Steps to Run the Example
  • Build the example
  • HW Setup
    • AM243-EVM
  • Run the example
• See Also
  • Sample output

Introduction

The PCIe MSIX IRQ (EP) example demonstrates MSIX (Message Signalled Interrupt Extended) from EP to RC.

The EP device sends back the buffer received from the RC device and sends MSI to the RC device.

Supported Combinations

Parameter	Value
CPU + OS	r5fss0-0_freertos
Toolchain	ti-arm-clang
Board	am243x-evm
Example folder	examples/drivers/pcie/pcie_msix_irq/pcie_msix_irq_ep

Steps to Run the Example

Build the example

• When using CCS projects to build, import the CCS project for the required combination and build it using the CCS project menu (see Using SDK with CCS Projects).
• When using makefiles to build, note the required combination and build using make command (see Using SDK with Makefiles)

HW Setup

Note

Make sure you have setup the EVM with cable connections as shown here, EVM Setup. In addition do below steps.

AM243-EVM

• For connecting two board in RC and EP mode a specialized cable as below is required
  
• This cable can be obtained from Adex Electronics (https://www.adexelec.com).
• Modify the cable to remove resistors in CK+ and CK- in order to avoid ground loops (power) and smoking clock drivers (clk+/-).
• The ends of the modified cable should look like below:

  • A side

    PCIe cable A side end 1

    PCIe cable A side end 2

  • B side

    PCIe cable B side end 1

    PCIe cable B side end 2

Run the example

• Launch a CCS debug session and run the example executable, see CCS Launch, Load and Run
• Run the PCIE MSIX IRQ RC example on the other connected board
• You will see logs in the UART terminal as shown in the next section.

See Also

PCIE

Sample output

Device in EP mode