Pulse counter using Timer

[rajani_sureja33]

Is it possible to use timer to count the pulses ??? if yes then how??

[rajani_sureja33]

I am getting the pclk freq but don't get external input freq, Can anyone suggest me what has been remained to select external input on this pin?.

[rajani_sureja33]

Instant help will be appreciated:smileyhappy:

[rajani_sureja33]

This is the P1.0 (Timer1/capture1) initialization code for rpm reading.

TIM_COUNTERCFG_Type TIM_FanspeedTimerConfig;
TIM_CAPTURECFG_Type TIM_FanspeedCaptureConfig;

TIM_FanspeedCaptureConfig.CaptureChannel = TIM_COUNTER_INCAP1;
TIM_FanspeedCaptureConfig.RisingEdge = ENABLE;
TIM_FanspeedCaptureConfig.FallingEdge = DISABLE;
TIM_FanspeedCaptureConfig.IntOnCaption = DISABLE;

TIM_ConfigCapture(LPC_TIMER1,&TIM_FanspeedCaptureConfig);
TIM_ResetCounter(LPC_TIMER1);

TIM_Cmd(LPC_TIMER1,ENABLE);

[rajani_sureja33]

I am using Timer0 to generate an interrupt at every 1sec and I am reading capture value at pin 1.0 to count value of rpm. is it a right way to measure the rpm of fan?

But, I m still not getting actual rpm reading on this pin.

Can you please advice me asap? 

[soledad]

Please check the below thread and let me know if this helps.

Any example to use CAPTURE PINS as pulse counters? | www.LPCware.com 

Have a great day,
Sol

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[soledad]

Hello,

Could you please mention the device you are using?

Regards

Sol

[rajani_sureja33]

we are using lpc1833 on P1.0