LinuxPPS

User Tools

Site Tools

Trace: • Technical Information
technical_information

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
technical_information [2025/02/24 09:01] – [Parallel port generator] giomettitechnical_information [2025/02/24 09:02] (current) – [Parallel port generator] giometti
Line 151: Line 151:
  
 To do so the class pps-gen has been added. PPS generators can be To do so the class pps-gen has been added. PPS generators can be
-registered in the kernel by defining a struct pps_gen_source_info as +registered in the kernel by defining a ''struct pps_gen_source_info'' as 
-follows::+follows:
  
     static struct pps_gen_source_info pps_gen_dummy_info = {     static struct pps_gen_source_info pps_gen_dummy_info = {
Line 161: Line 161:
     };     };
  
-Where the use_system_clock states if the generator uses the system+Where the ''use_system_clock'' states if the generator uses the system
 clock to generate its pulses, or they are from a peripheral device clock to generate its pulses, or they are from a peripheral device
-clock. Method get_time() is used to query the time stored into the +clock. Method ''get_time()'' is used to query the time stored into the 
-generator clock, while the method enable() is used to enable or+generator clock, while the method ''enable()'' is used to enable or
 disable the PPS pulse generation. disable the PPS pulse generation.
  
-Then calling the function pps_gen_register_source() in your+Then calling the function ''pps_gen_register_source()'' in your
 initialization routine as follows creates a new generator in the initialization routine as follows creates a new generator in the
-system::+system:
  
     pps_gen = pps_gen_register_source(&pps_gen_dummy_info);     pps_gen = pps_gen_register_source(&pps_gen_dummy_info);
Line 175: Line 175:
 ===== Generators SYSFS support ===== ===== Generators SYSFS support =====
  
-If the SYSFS filesystem is enabled in the kernel it provides a new class::+If the SYSFS filesystem is enabled in the kernel it provides a new class:
  
     $ ls /sys/class/pps-gen/     $ ls /sys/class/pps-gen/
Line 181: Line 181:
  
 Every directory is the ID of a PPS generator defined in the system and Every directory is the ID of a PPS generator defined in the system and
-inside of it you find several files::+inside of it you find several files:
  
     $ ls -F /sys/class/pps-gen/pps-gen0/     $ ls -F /sys/class/pps-gen/pps-gen0/
     dev  enable  name  power/  subsystem@  system  time  uevent     dev  enable  name  power/  subsystem@  system  time  uevent
  
-To enable the PPS signal generation you can use the command below::+To enable the PPS signal generation you can use the command below:
  
     $ echo 1 > /sys/class/pps-gen/pps-gen0/enable     $ echo 1 > /sys/class/pps-gen/pps-gen0/enable
Line 198: Line 198:
 ports, for example. ports, for example.
  
-Parallel port cable pinout::+Parallel port cable pinout:
  
         pin     name    master      slave         pin     name    master      slave
technical_information.1740387671.txt.gz · Last modified: by giometti