MT100EOCG I/O Control using mts-io

Most of the peripheral I/O on the MT100EOCG is accessible through the mts-io package. This package provides a device driver (mts_io) which exposes a sysfs interface to the user at /sys/devices/platform/mtcdp. You can control the I/O directly by manipulating the files in this directory, or you can use the provided sysfs wrapper program (mts-io-sysfs). mts-io-sysfs is just a bash script which reads from and writes to files in the sysfs platform directory.

/sys/devices/platform/mtcdp:
board-temperature Read the board temperature in Celsius. Typically reads between 33 and 39 degrees when unit is at room temperature.
radio-reset Reset the radio. Write a 0 to this file to reset the radio.
eth0-enabled Enable or disable the ethernet PHY.
extserial-dcd Carrier Detect on the external serial port
extserial-dtr Data Terminal Ready on the external serial port
rsersrc Radio Serial Source (G2 model only). Defaults to 0, which means the G2 cellular radio is connected to the processor and is accessible on /dev/ttyS1 as normal. If set to 1, the radio serial pins are connected to the external serial pins on the 80-pin connector (TXD_1, RXD_1, etc). This allows AT commands to be sent to the radio from the external serial port.
led1 Set LED1
led2 Set LED2. By default, this is a status LED and is controllable through /sys/class/leds/status/
led3 Read LED3. This is connected to the LS (line status) pin on the cellular radio and is read-only.
led4 Set LED4
led5 Set LED5
led6 Set LED6
gpo1 Sets or clears the GPO1 output pin
gpo2 Sets or clears the GPO2 output pin
gpo3 Sets or clears the GPO3 output pin
gpo4 Sets or clears the GPO4 output pin
gpi5 Reads the state of the GPI5 pin
gpi6 Reads the state of the GPI6 pin
gpi7 Reads the state of the GPI7 pin
gpi8 Reads the state of the GPI8 pin
gpi9 Reads the state of the GPI9 pin
gpi10 Reads the state of the GPI10 pin
gpio11 Sets/reads the state of the GPIO11 pin
gpio12 Sets/reads the state of the GPIO12 pin
adc0 Reads data from the adc0 register and triggers a new conversion. Value is between 0 and 1023 decimal (0x3FFh).
adc1 Reads data from the adc1 register and triggers a new conversion. Value is between 0 and 1023 decimal (0x3FFh).
adc2 Reads data from the adc2 register and triggers a new conversion. Value is between 0 and 1023 decimal (0x3FFh).
adc3 Reads data from the adc3 register and triggers a new conversion. Value is between 0 and 1023 decimal (0x3FFh).
Examples using mts-io-sysfs script

Print value of LED1, then turn it on

$ mts-io-sysfs show led1
0
$ mts-io-sysfs store led1 1

Print Board Temperature

$ mts-io-sysfs show board-temperature
38

Set GPO3

$ mts-io-sysfs store gpo3 1

Read GPI6

$ mts-io-sysfs show gpi6
0
Examples using sysfs directly

Print value of LED1, then turn it on

$ cd /sys/devices/platform/mtcdp/
$ cat led1
0
$ echo 1 > led1

Print Board Temperature

$ cd /sys/devices/platform/mtcdp/
$ cat board-temperature
38

Set GPO2

$ cd /sys/devices/platform/mtcdp/
$ echo 1 > gpo2

Read ADC 2

$ cd /sys/devices/platform/mtcdp/
$ cat adc2
340