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CC2541: PWM generation with KEYFOBDEMO board

Piyush Kumar96

Intellectual 370 points

Part Number: CC2541
Other Parts Discussed in Thread: CC2530

Hello sir,

i want to generate a PWM signal of 16KHz frequency.

So, what changes would i do in the keyfobdemo project of BLE Stack 1.4.2.2.

Thank You.

over 6 years ago

0 Fredrik K over 6 years ago

TI__Guru** 106705 points

Hi Piyush,

In my post in the thread you refer to I point to both a SW example as well as documentation including timer/PWM description. Did you review those?¨

Additionally you can look at the SW associated with this reference design which uses PWM: www.ti.com/.../TIDC-BLUETOOTH-LOW-ENERGY-LIGHT

Regards,
Fredrik

0 Piyush Kumar96 over 6 years ago in reply to Fredrik K

Intellectual 370 points

Hello Sir,

Thank you for your reply.

I did't see your post regrading PWM/TIMER.

Can you please share the link of that post.

0 YiKai Chen over 6 years ago in reply to Piyush Kumar96

Guru 735685 points

Try to refer to sunmaysky.blogspot.com/.../how-to-output-pwm-from-cc2530.html

0 Fredrik K over 6 years ago in reply to YiKai Chen

TI__Guru** 106705 points

I am referring to the thread you linked to as "original question" (at the top of this thread).

e2e.ti.com/.../718614

0 Piyush Kumar96 over 6 years ago in reply to Fredrik K

Intellectual 370 points

Hello Sir,

i can generated the PWM of various frequencies but can't be able to vary the duty cycle of it.

There will be spikes at a regular interval of time which is not good for the waveform and also the output voltage is in negative [ -2.30 ]

I use the KEYFOBDEMO project' BUZZER.c to generated the PWM.

please check this attachment and help us.

0 YiKai Chen over 6 years ago in reply to Piyush Kumar96

Guru 735685 points

In my links, it already shows you how you output 6.5K PWM with 50% duty cycle to P1.1 with CC2530 Timer 1.

0 Piyush Kumar96 over 6 years ago in reply to Piyush Kumar96

Intellectual 370 points

Hello Sir,

Please suggest the suitable the way to solve these problems.

0 YiKai Chen over 6 years ago in reply to Piyush Kumar96

Guru 735685 points

Already give you answer in my previous reply, don’t I?

0 Piyush Kumar96 over 6 years ago in reply to Fredrik K

Intellectual 370 points

No sir,

Can you share the link of that document.

0 Fredrik K over 6 years ago in reply to Piyush Kumar96

TI__Guru** 106705 points

Hi Piyush,

You have gotten several links to documentation in the earlier posts.

Regards,
Fredrik