Individual task Networking
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The document provides instructions for extending a UDP server to handle additional commands for reading the state of GPIO pins connected to LEDs on a board. The UDP server extension should accept "read gpio<PORT> <PIN>" commands to check the status of LEDs connected to pins 13, 12, 14, and 15, and reply with the pin and state like "GPIOD.15=1". The ncat utility can be used as a UDP client to send commands to control the LEDs or get their status by communicating with ports 5678 and 1234 of the UDP server, respectively.
Individual task Networking
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- 2. 2 C/Embedded Base Camp Individual Task: UDP Server Extension Petro Shevchenko November 2021
- 3. UDP Server Extension ● Due to the UDP server was implemented on the second practical lesson, there is no sense to estimate this solution. Therefore, implement the UDP server extension instead ● Apply patch 0001-add-UDP-server-implementation.patch to the tcp_socket_client project to add the UDP server implementation: $ git apply 0001-add-UDP-server-implementation.patch ● Implement the UDP server extension, that creates one more UDP socket, receives commands to read GPIO pins states of LEDs. Use select() and tips marked with TODO comments ● The UDP server extension must accept and execute the following command from the UDP client : ○ read gpio<PORT> <PIN> : read GPIO status, where PORT=d PIN = 12, 13, 14, 15 ○ Example: read gpiod 13 ● The reply should be the following: ○ GPIOD.<PIN>=<STATE>, where PIN = 12, 13, 14, 15 STATE = 0 or 1 ○ Example: GPIOD.15=1
- 4. UDP Server Extension (Cont.) ● LED pinout table: ○ LED3 GPIOD 13 ○ LED4 GPIOD 12 ○ LED5 GPIOD 14 ○ LED6 GPIOD 15 ● Use ncat utility as the first UDP client to manage LEDs : ● $ ncat -u <IP of the board> 5678 led6 off OK ● Use ncat utility as the second UDP client to get statuses of LEDs: $ ncat -u <IP of the board> 1234 read gpiod 15 GPIOD.15=0 ● Use Wireshark, output through USB-UART to debug your application ● Provide a link to your solution