EM-1220 LX User’s Manual
EM-1220-LX Device API
int set_gpio_mode(unsigned int pio, int mode)
--to configure GPIO ports to be DI ports or DO ports.
Input:
unsigned int pio - GPIO port number
Each GPIO point will be regarded as a port. We support from Port 0 to Port 9 for EM-1240, and
from Port 0 to Port 7 for EM-1220.
int mode
1
represents
DI.
0
represents
DO.
Output:
1
represents
high.
0
represents
low.
Return:
< 0 is wrong.
= 0 is correct.
int set_gpio_data(unsigned int pio, int data)
--to check the current status of the GPIO, either high or low voltage, used when the GPIO points
are configured as DO.
Input:
unsigned int pio - GPIO port number
Each GPIO point will be regarded as a port. We support from Port 0 to Port 9 for EM-1240, and
from Port 0 to Port 7 for EM-1220.
int data
1
represents
high.
0
represents
low.
Output:
1
represents
high.
0
represents
low.
Return:
< 0 is wrong.
= 0 is correct.
How to use
1.
The device driver must be loaded.
> insmod gpio.ko
2.
The program must include
<moxadevice.h>
and link to
libmoxalib.a
.
Here is an example:
> arm-elf-gcc –wl, -elf2flt –o TestGpioAp TestGpioAp.c –lmoxalib –lpthread
5-4
