frequency 40khz

Nabila Naorin

Intellectual 600 points

hi if i want to set the frequency 40KHz at NVIC_ST_RELOAD_R, how can i do that

over 11 years ago

0 Amit Ashara over 11 years ago

TI__Guru**** 244400 points

Hello Nabila,

if the Clock Source for the Systick is PIOSC/4 then you have to have a reload value of 99.

Regards

Amit

0 Nabila Naorin over 11 years ago in reply to Amit Ashara

Intellectual 600 points

hi let me add other details.. it 80mhz internal clock and 440hz square wave in both +ive -ive side.. so in total the period=80*10^(6)*62.5*10^(-9)=5ms ..now what value should i set in order to achieve this.. one of my friend suggested 90909..but i don't know know how?

0 Amit Ashara over 11 years ago in reply to Nabila Naorin

TI__Guru**** 244400 points

Hello Nabila

I am not sure what the equation is for. Do you want to generate a 440Hz Square wave using the SYSTICK?

Regards

Amit

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frequency 40khz