cc1101 programing with aurdino helppppppp

aleena hina

Prodigy 90 points

Other Parts Discussed in Thread: CC1101

hey,

i need help regaring cc1101 interface with aurdino........

i m using elechouse library files....

i m trying to read the value of the configuration register FREQ0

here is the code

#include <ELECHOUSE_CC1101.h>
byte s;
void setup ()
{
Serial.begin (9600);
ELECHOUSE_cc1101.Init();
s= ELECHOUSE_cc1101.SpiReadReg(CC1101_FREQ0);
Serial.println(s);
}
void loop ()
{}

but this returns me 0 everytime........ where as i set its value as 0x62... can some 1 help plxxx?????

over 11 years ago

0 Martin B over 11 years ago

TI__Genius 12735 points

Have you checked if you can read from other registers. A good way to check that the SPI works is to first read from a register with a known value for instance the PARTNUM or VERSION register. It is also helpful to monitor the SPI transmission with a logic analyzer or oscilloscope to see that the SPI timings are within spec.

0 aleena hina over 11 years ago in reply to Martin B

Prodigy 90 points

i did try........ i tried reading all the registers... alongwith partnum and version but it still returns me 0...

could you guide me how do i check this wid osciloscope?

0 Martin B over 11 years ago in reply to aleena hina

TI__Genius 12735 points

You need to monitor the SCLK, MISO, MOSI and CSn line for the SPI during a read and write operation. If you set the scope to trigger on the falling edge of CSn you will capture the transmission. Also take a look at section 10 the datasheet for timing and description of the interface.

Below is an example of a single and burst read from register 0x00.

0 aleena hina over 11 years ago in reply to Martin B

Prodigy 90 points

when i checked at the oscilloscope it gives me nothng at MISO and MOSI

i m using arduino uno .... and powering arduino using usb port.... while i m using 3.3v pin to power cc1101 (from arduino)......

when we set SS_PIN high and measure voltage at the arduino pin it gives me a voltage level of 5V whereas the max power that the cc1101 ic pins can tolerate is 3.9V... do you think this could be the issue??

do i need a voltage translater (or voltage divider) to convert 5v to 3.9v before giving it to cc1101 SS_pin

0 Martin B over 11 years ago in reply to aleena hina

TI__Genius 12735 points

Yes you should reduce the voltage to the SS_PIN on the CC1101 to be within spec. That being said you should have seen data on the MOSI line regardless of this. It is the MCU that controls the SPI, so if you see nothing on the MOSI I would check if the SPI is set up correctly on the MCU.

0 aleena hina over 11 years ago in reply to Martin B

Prodigy 90 points

http://labalec.fr/erwan/?p=497

this is the way i m setting up my connections

0 Martin B over 11 years ago in reply to aleena hina

TI__Genius 12735 points

Sorry if I was a bit vague, but I was thinking of the software configuration of the SPI peripheral on the MCU. If you do not get any clock signal out on the SCK the SPI interface is probably not set up correctly.

0 aleena hina over 11 years ago in reply to Martin B

Prodigy 90 points

hey,

i got it...... :)

i can nw read the configuration registers successfully.......... thnkxx 4 ur help

but now i m getting another issue :p

when i try 2 tansmit some data, it fails... besides i have initialized the chip setting freq 2 b 433MHz, but when i try 2 see the signal on spectrum analyzer...... it doesnt give me any signal :(.......any help plxx?

0 Martin B over 11 years ago in reply to aleena hina

TI__Genius 12735 points

Could you post your register settings and a code snippet of your TX code? This would be helpful investigating this issue.

0 aleena hina over 11 years ago in reply to Martin B

Prodigy 90 points

thnkxxx 4 ur help ........ i got my transmitter and receiver working...... it was just the voltage issue... connected voltage dividor to all the digital pins and got the issue resolved :)

thnkxxxx alot 4 ur help n tym :)

0 aleena hina over 11 years ago in reply to Martin B

Prodigy 90 points

hey can u guide me plxx?

i want to create a text file to store the values of rssi for further access... now tht i m able to read rssi successfully and print it on serial monitor, could u guide me hw to create a text file n save data to it

thnkxxxxx

0 Martin B over 11 years ago in reply to aleena hina

TI__Genius 12735 points

Hi Aleena

This is a MCU task and the Arduino board is not an TI LPRF product so my knowledge on this is very limited. If you already have a serial interface between the PC and the board set up, most terminal programs have the ability to save incoming text to a file. How to do this in hyperterminal can be found here:

http://technet.microsoft.com/en-us/library/cc738294(v=ws.10).aspx

This post may also be of interest:

http://forum.arduino.cc/index.php/topic,44265.0.html

0 Francisco Velasco over 9 years ago in reply to aleena hina

Prodigy 30 points

Hi! I`m doing exactly what you do but I have working 433 Mhz without any extra supply, just the arduino USB connection. But when I try to use 915 Mhz it doesnt work. could you tell me how did you connect your supply, please?

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cc1101 programing with aurdino helppppppp