AM5718: Frequency calibration for 20M crystal oscillator

Jiazhe Li

Part Number: AM5718

Tool/software:

with a 20MHz crystal oscillator and a frequency division coefficient of 610, the system clock deviates by about 50 seconds per day. How can I configure the software to fix this system deviation and make the system time run more accurately, ensuring a deviation of no more than 1 second over 24 hours?

2 days ago

0 Josue Zamitiz-Ayala 1 day ago

TI__Mastermind 31424 points

Hello Jiazhe,

What software are you using? Linux perhaps?

Some methods are using NTP.

-Josue

0 Jiazhe Li 1 day ago in reply to Josue Zamitiz-Ayala

Prodigy 10 points

Linux

0 Jiazhe Li 23 hours ago in reply to Josue Zamitiz-Ayala

Prodigy 10 points

FUNC_32K_CLK=SYS_CLK1/610

20000000/610=32786.885246Hz

For the Device Tree.

sys clk32 pseudo ck {
#clock-cells =<0x00>;
compatible ="fixed-factor-clock";
clocks =<0x01>;
clock-div = <0x262>;
phandle = <0x0d>;
};

as I know,FUNC_32K_CLK > 32768,so the system clock is run faster than it should be,I want to configure my system clock to be as accurate as possible,How should I set it up