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Moxa EM-1240-T-LX Инструкция по эксплуатации онлайн [49/57] 170900
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EM-1240-LX User’s Manual EM-1240-LX Device API
typedef struct gpio_set_struct {
int io_number;
int mode_data;
} gpio_t;
/*
* To get the GPIO mode now.
* Input: unsigned int pio - the GPIO number, from 0 to MAX_GPIO-1
* Output: < 0 - some error
* 1 - input
* 0 - ouput
*/
int get_gpio_mode(unsigned int gpio_no)
{
int fd;
gpio_t pset;
CHECK_GPIO_NO(gpio_no);
fd = open(GPIO_DEVICE_NODE, O_RDWR);
if ( fd < 0 )
return GPIO_NODE_ERROR;
pset.io_number = gpio_no;
if ( ioctl(fd, IOCTL_GPIO_GET_MODE, &pset) != 0 ) {
close(fd);
return GPIO_ERROR;
}
close(fd);
return pset.mode_data;
}
/*
* To get the GPIO data now.
* Input: unsigned int pio - the GPIO number, from 0 to MAX_GPIO-1
* Output: < 0 - some error
* 1 - high
* 0 - low
*/
int get_gpio_data(unsigned int gpio_no)
{
int fd;
gpio_t pset;
CHECK_GPIO_NO(gpio_no);
fd = open(GPIO_DEVICE_NODE, O_RDWR);
if ( fd < 0 )
return GPIO_NODE_ERROR;
pset.io_number = gpio_no;
if ( ioctl(fd, IOCTL_GPIO_GET_DATA, &pset) != 0 ) {
5-6
Содержание
- Em 1240 lx user s manual 1
- Fifth edition february 2009 1
- Www moxa com product 1
- Copyright notice 2
- Disclaimer 2
- Em 1240 lx user s manual 2
- Technical support contact information www moxa com support 2
- Trademarks 2
- Table of contents 3
- Introduction 5
- Overview 6
- Package checklist 6
- Product features 6
- Hardware specifications 7
- Product specifications 7
- Software specifications 8
- Appearance 9
- Em 1240 embedded module development kit 9
- Em 1240 lx user s manual introduction 9
- Hardware block diagram 9
- Em 1240 development kit 10
- Em 1240 embedded module 10
- Em 1240 lx user s manual introduction 10
- Dimensions 11
- Installing the em 1240 lx 11
- Led indicators 12
- Wiring requirements 12
- Connecting data transmission cables 13
- Connecting the power 13
- Connecting to the network 13
- Grounding the em 1240 lx 13
- Connecting to a serial device 14
- Serial console port 14
- Additional functions 15
- Internal sd socket 15
- Reset button 15
- Real time clock 16
- Getting started 17
- Connecting the em 1240 lx to a pc 18
- Console port 18
- Powering on the em 1240 lx 18
- Telnet 19
- Configuring the ethernet interface 20
- Developing your applications 22
- Installing a secure digital sd memory card 22
- Compiling hello c 23
- Installing the em 1240 lx tool chain 23
- Uploading hello to the em 1240 lx 24
- Running hello on the em 1240 lx 25
- Make file example code 26
- Software package 27
- Em 1240 lx software architecture 28
- Journaling flash file system jffs2 29
- Em 1240 lx software package 30
- Configuring the em 1240 lx 32
- Enabling and disabling daemons 33
- How to enable disable etc inittab www server 33
- How to enable disable telnet ftp server 33
- How to enable network time protocol 33
- How to update the system time periodically with network time protocol 33
- Adding a web page 34
- Iptables 34
- Observe and erase chain rules 36
- Append or delete rules 37
- Define policy for chain rules 37
- Enabling nat at bootup 38
- Nat example 38
- Configuring dial in dial out service 39
- Configuring pppoe 39
- Connect using a modem 39
- Dial in service 39
- Dial out service 39
- Direct cable connection 39
- Dynamic driver module load unload 40
- How to mount a remote nfs server 40
- Upgrading the kernel 41
- Upgrading the root file system user directory 42
- Autostarting user applications on bootup 43
- Checking the kernel and root file system versions 43
- Loading factory defaults 43
- Em 1240 lx device api 44
- Buzzer 45
- Rtc real time clock 45
- Uart interface 45
- Api list 46
- Moxa gpio api 46
- How to use the gpio 47
- Gpio library source code 48
- Limits 48
- A system commands 52
- Editor 52
- File manager 52
- System commands 52
- Μclinux normal command utility collection 52
- Moxa special utilities 53
- Network 53
- Process 53
- B snmp agent with mib ii rs 232 like group 54
- Snmp agent with mib ii rs 232 like group 54
- C em 1240 lx faq 57
- Em 1240 lx faq 57
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