Included Examples and Scripts¶

LED Driver¶

The MitySOM-5CSX module features a tri-color (red, green and blue) LED that can be controlled by a user application or script. We have provided an example script that interfaces with the LED driver. Note that for development kits that included "pre-production" silicon you should reference the "leds" script and for newer module/development kits use the "lp5562" script.

80-000640 and 80-000639 Development Kit LED script¶

Uses an LED driver, instead of I2C write commands, to change the color of the LED in a pattern. Create a script titled "lp5562" and paste the contents below inside. Then, run "chmod +x lp5562" to make it executable and run the script.

lp5562 Script Content (cycles through each LED/color)

#!/bin/sh
echo 100 > /sys/class/leds/B/brightness
echo "BLUE ON" 
sleep 1
echo 0 > /sys/class/leds/B/brightness
echo 100 > /sys/class/leds/R/brightness
echo "RED ON" 
sleep 1
echo 0 > /sys/class/leds/R/brightness
echo 100 > /sys/class/leds/G/brightness
echo "GREEN ON" 
sleep 1
echo 0 > /sys/class/leds/G/brightness
echo 100 > /sys/class/leds/G1/brightness
echo "GREEN1 ON" 
sleep 1
echo 0 > /sys/class/leds/G1/brightness

The expected output can be seen below. The RGB LED on the SOM should light up in the order presented in the output.

root@mitysom-5csx:~# ./scripts_auto/lp5562
BLUE ON
RED ON
GREEN ON
GREEN1 ON

Depreciated - 80-000615 Development Kit LED script¶

./leds

I2C Power/Current monitor (IC located on baseboard)¶

The MitySOM-5CSX Development Kit Baseboard features a LTC2945 current monitor IC which monitors the current drawn by the modules +5V supply. This allows users to obtain an good approximation of module power consumption instantaneously.

root@mitysom-c5:~# ./scripts_auto/pwr_test.sh 
Checking power consumption
power = 2765 mW
Power Test:                   PASSED: Power = 2765 mW

SoM Thermocouple "tc74"¶

The MitySOM-5CSX module features an on-module thermocouple that can read the current temperature from that location. It is located on the "bottom" side of the module. Unlike the examples above the thermocouple is read by an application that is included on the development kit SD card file system.

For the latest details about using the temperature sensor please visit https://support.criticallink.com/redmine/projects/mityarm-5cs/wiki/SoM_Temperature_Sensor

FPGA DDR Memory Test¶

As a part of the included/pre-built FPGA image that is loaded automatically on startup of the module there is also a test application that writes and reads from the FPGA DDR memory. To execute this test perfrom the following command from the serial port:

root@mitysom-c5:~# ./fpga_ddr_test.sh 
______________ STARTING DDR TEST ______________
Pattern Type: PRBS7
mem_check Location: 0xff210000
writing 256000000 bytes to 0
errors to inject: 0
________________________________________
Writing 32-bit value 0x1 to address 0xFF218004
Writing 32-bit value 0x1 to address 0xFF214004
Writing 32-bit value 0x1 to address 0xFF218000
Writing 32-bit value 0x22 to address 0xFF210064
Creating descriptor for write (0xF424000 Bytes)
Writing 32-bit value 0x0 to address 0xFF210044
Writing 32-bit value 0xF424000 to address 0xFF210048
Writing 32-bit value 0x80000000 to address 0xFF21005C
Waiting for write to finish and injecting 0 errors
Writing 32-bit value 0x1 to address 0xFF214000
Writing 32-bit value 0x22 to address 0xFF210024
Creating descriptor for read
Writing 32-bit value 0x0 to address 0xFF210004
Writing 32-bit value 0xF424000 to address 0xFF210008
Writing 32-bit value 0x80000000 to address 0xFF21001C
Waiting for read to finish
snapshotting counters
Writing 32-bit value 0x1 to address 0xFF214008
Disabling/resetting generator/checker
Writing 32-bit value 0x0 to address 0xFF214000
Writing 32-bit value 0x0 to address 0xFF218000
Writing 32-bit value 0x2 to address 0xFF214008
Number of bytes written/read: 256000000/255999344
Number of errors injected/read: 0/0:
Result: Passed

"eth_test.sh"¶

The included image/pre-built FPGA provides a script to test the network connection. Before running this script, modify the SERVER variable within the file to a known server's IP or something like Google's DNS server (8.8.8.8) to properly carry out a ping test. To do this, 'vi' can be used within the user space to quickly edit the variable which is on line 7 of the script. After completing the modification, perform the command seen below from the serial port while the Ethernet cable is connected (a successful test will look similar to the output below).

root@mitysom-c5:~# ./scripts_auto/eth_test.sh 
Testing ethernet using server: 10.0.0.123
PING 10.0.0.123 (10.0.0.123) 56(84) bytes of data.
64 bytes from 10.0.0.123: icmp_seq=1 ttl=64 time=0.325 ms

--- 10.0.0.123 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.325/0.325/0.325/0.000 ms
PING 10.0.0.123 (10.0.0.123) 56(84) bytes of data.
64 bytes from 10.0.0.123: icmp_seq=1 ttl=64 time=0.143 ms
64 bytes from 10.0.0.123: icmp_seq=2 ttl=64 time=0.182 ms
64 bytes from 10.0.0.123: icmp_seq=3 ttl=64 time=0.161 ms
64 bytes from 10.0.0.123: icmp_seq=4 ttl=64 time=0.144 ms
64 bytes from 10.0.0.123: icmp_seq=5 ttl=64 time=0.140 ms

--- 10.0.0.123 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4146ms
rtt min/avg/max/mdev = 0.140/0.154/0.182/0.015 ms
Verifying output
Testing ethernet link speed
Settings for eth0:
        Supported ports: [ TP    MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Advertised pause frame use: Symmetric Receive-only
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                             100baseT/Half 100baseT/Full
                                             1000baseT/Full
        Link partner advertised pause frame use: Symmetric
        Link partner advertised auto-negotiation: Yes
        Link partner advertised FEC modes: Not reported
        Speed: 1000Mb/s
        Duplex: Full
        Auto-negotiation: on
        master-slave cfg: preferred slave
        master-slave status: slave
        Port: Twisted Pair
        PHYAD: 3
        Transceiver: external
        MDI-X: Unknown
        Supports Wake-on: d
        Wake-on: d
        Current message level: 0x0000003f (63)
                               drv probe link timer ifdown ifup
        Link detected: yes
Ethernet test:                PASSED: Ping: PASSED Speed: PASSED