Avalue Technology VNS-10W01, Краткое руководство пользователя

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VNS-10W01
26 VNS-10W01 Quick Reference Guide
3.3 For Ubuntu 19.04 LED instruction
3.3.1 File list
No Filename Description
1 VNS LED Control Quick Guide_v1.0.doc Guideline document
2 VNS_LED-20181121.zip Demo app source code
3 vns_led Demo app execution file
3.3.2 Building
1. Prepare a VNS device with Ubuntu(16.04above) and install complier package(Ex: gcc,
make, c-library).
2. Make a working folder in Ubuntu Ex: app.
3. Unzip VNS_LED.zip to working folder.
4. In working folder, enter
”$ make” to complier and it would create execute file ”
vns_led
”.
5. Copy
”
vns_led
” to VNS device and set to executable file.
6. Start to test/execute in root right.
3.3.3 EC, I2C Definition on VNS device
Bus Number (on VNS): 0x02
EC I2C Device Address (on VNS): 0x70
EC I2C Read Command: 0x80
EC I2C Write Command: 0x81
LED I2C Device Address (on EC): 0x01
LED Data Address (on LED Device): 0xbc
3.3.4 Operation (vns_led)
Syntax: vns_led <led_id>
Option:
led_id: 0=off, 1=red, 2=green
Sample:
vns_led 1 // light on the RED LED
vns_led 2 // light on the GREEN LED
vns_led 0 // turn off LED
3.3.5 APP & API Introduction (vns_led.c, i2c-dev.h, i2cbusses.h)
3.3.5.1 Open I2C driver
int open_i2c_dev(int i2cbus, char* filename, size_t size, int quiet);
Open i2c driver, and return file handle.
Parameter: