6
SIM ...............................................................................25
USB1.............................................................................25
OTG ..............................................................................26
SW2 ..............................................................................26
M2 ................................................................................26
2.3. Mechanical Drawing..........................................................................28
3. Software User Guide........................................................................................ 30
...................................................................................................................30
3.1. Introduction .................................................................................... 30
3.2. Development Environment ................................................................30
3.2.1. How to Install Toolchain ...............................................................30
3.2.2. RS232 Debug Console.................................................................. 32
Debug Console Information................................................32
Debug Console Device Node............................................... 32
Boot Message...................................................................32
3.2.3. Networking Settings ....................................................................33
3.2.4. Firmware Version ........................................................................33
Android Version ................................................................33
3.2.5. eMMC Default Partitions ............................................................... 35
3.3. Interface Introduce ..........................................................................36
3.3.1. RS232 .......................................................................................36
RS232 Interface ............................................................... 36
RS232 Specification ..........................................................36
RS232 Device Node...........................................................36
RS232 Sample Code.......................................................... 36
3.3.2. RS422/485 .................................................................................37
RS422/485 Information .....................................................37
RS422/485 Specification.................................................... 37
RS422/485 Device Node .................................................... 37
RS422/485 Sample Code ................................................... 37
3.3.3. RTC & Watchdog (Not Ready)........................................................38
RTC & Watchdog Information.............................................. 38
RTC & Watchdog Specification ............................................38
RTC & Watchdog Device Node............................................. 38
RTC & Watchdog Example .................................................. 38
3.3.4. I2C bus (Inter-Integrated Circuit)..................................................39
I2C bus Information ..........................................................39
I2C bus Specification......................................................... 39
