technical_information
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technical_information [2018/08/29 16:06] giometti created |
technical_information [2018/08/30 18:25] giometti Add proper page's header |
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| - | ====== RFC considerations ====== | + | ====== Technical Information ====== |
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| + | ===== RFC considerations ===== | ||
| While implementing a PPS API as RFC 2783 defines and using an embedded | While implementing a PPS API as RFC 2783 defines and using an embedded | ||
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| into files ''/dev/pps0'', ''/dev/pps1'', etc. | into files ''/dev/pps0'', ''/dev/pps1'', etc. | ||
| - | ====== PPS with USB to serial devices ====== | + | ===== PPS with USB to serial devices ===== |
| It is possible to grab the PPS from an USB to serial device. However, | It is possible to grab the PPS from an USB to serial device. However, | ||
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| ch341 and pl2303 examples). | ch341 and pl2303 examples). | ||
| - | ====== Coding example ====== | + | ===== Coding example ===== |
| To register a PPS source into the kernel you should define a ''struct | To register a PPS source into the kernel you should define a ''struct | ||
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| Please see the file ''drivers/pps/clients/pps-ktimer.c'' for example code. | Please see the file ''drivers/pps/clients/pps-ktimer.c'' for example code. | ||
| - | ====== SYSFS support ====== | + | ===== 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: | ||
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| PPS source is connected to (if it exists). | PPS source is connected to (if it exists). | ||
| - | ====== Testing the PPS support ====== | + | ===== Testing the PPS support ===== |
| In order to test the PPS support even without specific hardware you can use | In order to test the PPS support even without specific hardware you can use | ||
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| This is available in the **pps-tools** repository mentioned above. | This is available in the **pps-tools** repository mentioned above. | ||
| - | ====== Generators ====== | + | ===== Generators ===== |
| Sometimes one needs to be able not only to catch PPS signals but to produce | Sometimes one needs to be able not only to catch PPS signals but to produce | ||
technical_information.txt · Last modified: 2018/08/30 18:25 by giometti
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