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PSoC 4

Anonymous
Not applicable

Dear sir..

                My project is to read RFID data from RFID tag. Frequency of the RFID is 125 KHZ. what I am supposed to do is to Capture the pulses at 125 KHZ on the single pin. PIN DEMODE I had configured as capture PIN as I will receive the data on that particular pin. I configured TIMER [V2.70] as capture and configurations setting for it is attached in this Page as TIMER Configuration file.

In that timer block Clock input is present. what clock signals should be present at that input? either internal Clock signal on which entire controller is working or it should be 125 Khz? 

I want interrupt at every rising and falling edge then I need to calculate the time of the pulse high time and low time. So for that I require to get the capture count when interrupt occurred and also the timer count at the same time. Which register or which function provides the Capture count and the timer count ? Timer Configurations.jpg

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1 Solution
5 Replies
Bob_Marlowe
Expert II

In PSoC documentation the "Capture Count" reflects to the number of apture events. At a valid capture the current timer count is transferred into a 4 word deep FIFO from where you may read with the Timer_ReadCapture() API.

An interrupt frequency of 125kHz is way too high and will not work.

The "Clock" signal in your configuration will decrease the count value.

I am not quite familar with the RFID signal, please provide a link to the datasheet of your device.

Bob

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Anonymous
Not applicable

Hii sir,

I have attached the Datasheet em4095 in this mail. or link

http://www.emmicroelectronic.com/sites/default/files/public/products/datasheets/em4095_ds.pdf

philbrick Technologies (India) Pvt. Ltd.

PLOT-69,ROAD NO.-6, G.I.D.C.

KATHWADA, AHMEDABAD-382 430.

PH- 08401219941.

Mobile- 98250 09420,93740 22660.

ELEVATOR CONTROL PANELS, ARD, DOTMATRIX, LCD-TFT DISPLAYS, FLOOR

ANN.SYSTEM, TOUCH PANEL, COPs, LOPs, DOOROPERATOR CONTROLLER, DOOR

HEADER, LIGHT CURTAIN SENSOR, AUDIO DEVICES, LIFT MASTER, LIFT DISPLAY.

TIMERS, TEMP.PROGRAMMER, PLC, SCADA& AUTOMATION PANELS, PCC, MCC

PANELS.

philbrick_controls@yahoo.com

www.philbrickindia.com

On Thu, Jan 11, 2018 at 4:05 PM, user_1377889 <community-manager@cypress.com

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Bob_Marlowe
Expert II

The 125 kHz frequency is the RF carrier frequency. The data is modulate on the RF. So you should find out what kind of signal is generated by the device you want to read from. Could be something like  serial data as frfom UART.

Bob

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Anonymous
Not applicable

hi Bob

I am receiving Digital signal on the single pin Demod din which is to

be decoded as 1 or 0 by the code. I am getting the signals in MANCHESTER

encoding format. UART is not supported by EM4095.

philbrick Technologies (India) Pvt. Ltd.

PLOT-69,ROAD NO.-6, G.I.D.C.

KATHWADA, AHMEDABAD-382 430.

PH- 08401219941.

Mobile- 98250 09420,93740 22660.

ELEVATOR CONTROL PANELS, ARD, DOTMATRIX, LCD-TFT DISPLAYS, FLOOR

ANN.SYSTEM, TOUCH PANEL, COPs, LOPs, DOOROPERATOR CONTROLLER, DOOR

HEADER, LIGHT CURTAIN SENSOR, AUDIO DEVICES, LIFT MASTER, LIFT DISPLAY.

TIMERS, TEMP.PROGRAMMER, PLC, SCADA& AUTOMATION PANELS, PCC, MCC

PANELS.

philbrick_controls@yahoo.com

www.philbrickindia.com

On Sat, Jan 13, 2018 at 1:28 AM, user_1377889 <community-manager@cypress.com

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