in ncs1.5.0 and nrf5340, how to set CPU work in 128mhz changeless?

[zhouhaifang]

 my project ,sample data every 4ms comes in a GPIOE interrupt ,and in interrupt give a data come semophere , but in thread take this data come semophere and read data can not synchronize ,always data come several times and in thread take one semophere and read one time .most come data lost. so  i want to improve nrf5340 CPU work frequency to 128mhz changeleessly.

[Amanda Hsieh]

Hi, 

The application core clock HCLK128M can at any time be scaled from the HFCLK128M clock using the HFCLKCTRL register.

The peripheral clocks are fixed at their frequency regardless of HFCLKCTRL. What peripheral are you using?

-Amanda H.

[zhouhaifang]

in code ,how to set cpu use 128mhz

[Amanda Hsieh]

NRF_CLOCK_S.HFCLKCTRL = 0;

-Amanda H.