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Altera_Forum
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11 years ago

How to craete a 1 microsecond interval Timer of HPS ?

What HWLIB APIs should I use to configure a Timer of HPS with a 1 micro-second interval ? How can I get the Timer Input Clock frequency and set the appropriate count into Timer ? Than...
Altera_Forum's avatar
Altera_Forum
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11 years ago

============= OSC1_TMR0 ===========

Input clock (OSC1) freq = 25000000 Hz

desire freq is 1000000 Hz.

timer count is 25 .alt_gpt_reset_value_get(), count = 25.

INFO: Timer Period in microseconds is 1.

INFO: Timer running at 961538Hz.

============= SP_TMR0 ===========

Input clock freq = 100000000 Hz

desire freq is 1000000 Hz.

timer count is 100 . alt_gpt_reset_value_get(), count = 100.

INFO: Timer Period in microseconds is 1.

INFO: Timer running at 990099Hz.