ACR890 – Reference Manual info@acs.com.hk
Version 1.01 www.acs.com.hk
Page 2 of 70
Table of Contents
1.0. Introduction .............................................................................................................4
2.0. File and Directory Structure ...................................................................................5
3.0. Keypad APIs ............................................................................................................6
3.1. Open keypad file descriptor...................................................................................................6
3.2. Close Keypad file descriptor..................................................................................................6
3.3. Get current keypad state .......................................................................................................7
3.4. Set Power Button Working Mode ..........................................................................................7
3.5. Get Power Button Working Mode..........................................................................................8
4.0. Backlight Control APIs..........................................................................................10
4.1. Get current backlight level...................................................................................................10
4.2. Set backlight level................................................................................................................11
5.0. Battery and Charger APIs.....................................................................................12
5.1. Get battery and charger state..............................................................................................12
6.0. LED Control APIs...................................................................................................13
6.1. Set LED state.......................................................................................................................13
6.2. Get LED’s blinking status.....................................................................................................14
7.0. GPRS Module Power Management APIs..............................................................15
7.1. Power on GPRS ..................................................................................................................15
7.2. Power off GPRS ..................................................................................................................16
7.3. Set pppd connect parameter ...............................................................................................17
7.4. Set pppd dialer parameter...................................................................................................18
7.5. Start up pppd process..........................................................................................................19
7.6. Turn off pppd process..........................................................................................................20
7.7. Transmit one AT command .................................................................................................22
7.8. Get IMEI Serial Number.......................................................................................................23
8.0. Audio (ALSA) APIs ................................................................................................24
8.1. Get system audio volume....................................................................................................24
8.2. Set system audio volume.....................................................................................................25
8.3. Sound playback ...................................................................................................................26
8.4. Speaker Sound Control .......................................................................................................27
9.0. Firmware APIs .......................................................................................................28
9.1. Get firmware version............................................................................................................28
10.0. Thermal Printer APIs.............................................................................................29
10.1. Open the printer port............................................................................................................29
10.2. Close the printer port ...........................................................................................................30
10.3. Reset the printer ..................................................................................................................31
10.4. Feed paper to printer ...........................................................................................................32
10.5. Set line space in Standard Mode.........................................................................................33
10.6. Print string in Standard Mode..............................................................................................34
10.7. Print string in Page Mode ....................................................................................................35
10.8. Print data array in Standard Mode.......................................................................................37
10.9. Print data array in Page Mode.............................................................................................38
10.10. Print an image......................................................................................................................39
10.11. Get status of the printer .......................................................................................................40
11.0. Wireless LAN Module Control APIs......................................................................42
11.1. Power on wireless LAN module...........................................................................................42
11.2. Power off wireless LAN module...........................................................................................43
