/etc... RF Forum - Recent Threads

Can't open CC2540EM reference design

Luis Fernando Valdez Gardu��o — Wed, 15 May 2013 17:09:40 GMT

I tried to open the .PCB file with Orcad, PCBexpress and others but the file seems to be in a different format. Witch program should I use to open the file?

CC4000 GPS module

Dibakar Barua — Fri, 21 Dec 2012 05:56:47 GMT

Hello

I have been trying to integrate the CC4000 GPS module with the arduino platform. I wanted to know if open sky conditions are a MUST for me to get a fix as i was working inside a lab. Also, is there any way to test if the device is working without seeing a display on the serial monitor. I tried using the fix available pin but it was not responding.

Connection between two RF modules CC3000

ale magnum — Fri, 12 Oct 2012 08:00:13 GMT

Hi,

I would to connect two indipendent boards: "CC3000 Wi-Fi STELLARIS CORTEX-M4" without any other external router or wifi module. In other words, I would only to transmitt SPI data from one board to the other, by WiFi.

Is it possible to do that? Are there any examples for this application?

Thank you for the kind reply!

Alessandro Magnani, PhD student.

CC2550 not wake up - Help

tan pham ngoc — Tue, 14 May 2013 10:41:29 GMT

Hi TI engineer team,

I'm from SerialSystem distributor of TI.

My customer has problem with CC2550. It doesn't wake up after sleeping with code of CC2500. Pls help.

Below code is valid with CC2500.

/******************************************************************
* power down mode
*
*
*******************************************************************/
void RF_Sleep()
{
//change to idle
TI_CC_SPIStrobe( TI_CCxxx0_SIDLE );

TI_CC_SPIStrobe( TI_CCxxx0_SPWD );

}
/******************************************************************
* wake up from sleep
*
*******************************************************************/
void RF_Wakeup()
{
TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;        // /CS enable

while (!(USICTL1&USIIFG));
TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;        // /CS enable
   //change to idle
TI_CC_SPIStrobe( TI_CCxxx0_SIDLE );
TI_CC_SPIStrobe( TI_CCxxx0_SNOP );
}

ADC Input Impedance Matching

Janus Davidson — Mon, 13 May 2013 22:23:45 GMT

Hello,

The input impedance for ADC083000 seems to be 100 Ohms. However, I have a 50 Ohm coaxial cable as the ADC input; how do I match the ADC to the 50 Ohm line?

Thanks.

SD Card

Lionel Gautier — Thu, 02 May 2013 20:29:24 GMT

Hi,

I'm trying to use a SD Card with my CC1110 and my CC1111. My problem is that sometimes ti works, and sometimes no (more often no) :(

If put some pull-up resistor on CS, DI and DO. The initialisation of the SD Card is done at 200KHz. I use USART0 in SPI Mode and Alternative1 (Initialisation is made from the example of swrc177 : cc1110_cc2510_BasicExamples_Software).

Does anyone have already work on that kind of project? Here is my code (adapted from one I found for an Arduino project) :

void spiInit(void) {
    // Configure USART0 for Alternative 1 => Port P0 (PERCFG.U0CFG = 0)
    // To avoid potential I/O conflict with USART1:
    // configure USART1 for Alternative 2 => Port P1 (PERCFG.U1CFG = 1)
    PERCFG = (PERCFG & ~PERCFG_U0CFG) | PERCFG_U1CFG;

    // Give priority to USART 0 over USART 1 for port 0 pins
    P2DIR = (P2DIR & ~P2DIR_PRIP0) | P2DIR_PRIP0_0;

    // Set pins 2, 3 and 5 as peripheral I/O and pin 4 as GPIO output
    P0SEL = (P0SEL & ~BIT4) | BIT5 | BIT3 | BIT2;
    P0DIR |= BIT4;
    P0_4 = 1;

   // Set USART to SPI mode and Master mode
    U0CSR &= ~(U0CSR_MODE | U0CSR_SLAVE);

    // Set:
    // - mantissa value
    // - exponent value
    // - clock phase to be centered on first edge of SCK period
    // - negative clock polarity (SCK low when idle)
    // - bit order for transfers to LSB first
    U0BAUD = SPI_BAUD_M;
    U0GCR = (U0GCR & ~(U0GCR_BAUD_E | U0GCR_CPOL | U0GCR_CPHA)) | U0GCR_ORDER | SPI_BAUD_E;

    //U0UCR |= 0x80;
}

uint8 spiSendCmd(uint8 data) {
    uint8 j=0;

    spiError = 0;
    U0DBUF = data; // Write byte to USART0 buffer (transmit data)

    while((U0CSR & U0CSR_TX_BYTE)!=U0CSR_TX_BYTE){ // Check if byte is transmitted
      if(j++>=0xFF) {
        //U0UCR |= 0x80;
        spiError = 1;
        return 0; // timeout error
      }
    };
    U0CSR &= ~U0CSR_TX_BYTE; // Clear transmit byte status

    return U0DBUF;
}

uint8 sdSendCmd(uint8 cmd, uint32 arg){
    uint8 res=0, timeout=0;
    P0_4 = 0;
    spiSendCmd(0xFF); // dummy byte
    cmd |= 0x40; // cmd token OR'ed with 0x40
    spiSendCmd(cmd);
    for(int i=3; i>=0; i--) spiSendCmd(arg>>(i*8)); // send argument in little endian (MSB first)
    spiSendCmd(0x95); // checksum valid for GO_IDLE_STATE, not needed thereafter, so we can hardcore this value
    while((res = spiSendCmd(0xFF))==0xFF) if(timeout++>100) break;
    return res;
}

uint8 sdInit(void){
    uint8 retries=0;

    sdError = 0;
    P0_4 = 1; // Set SSN to active low
    P0_3 = 1; // Set MOSI high

    for(int i=0; i<10; i++) spiSendCmd(0xFF); // send 10 times 8 pulses for a warmup (74 minimum)

    P0_4 = 0; // Set SSN to active high

    while(sdSendCmd(CMD0, 0) != 0x01) { // while SD card is not in idle state
      if(retries++>=0xFF){
        //U0UCR |= 0x80;
        sdError = 1;
        //P0_4 = 1;
        return 0;
      }
      BSP_DELAY_USECS(5);
    }

    retries=0;
    sdSendCmd(CMD55, 0); // startup sequence for SD cards 55/41
    while(sdSendCmd(ACMD41, 0) != 0x00) {
        if(retries++>=0xFF){
          //U0UCR |= 0x80;
          sdError = 1;
          //P0_4 = 1;
          return 0;
        }
        BSP_DELAY_USECS(1);
        sdSendCmd(CMD55, 0);
    }

    sdSendCmd(CMD16, 512);
/*
    U0BAUD = 0x00;
    U0GCR &= 0xE0;
    U0GCR |= 0x14;
*/
    return 1;
}

If you see anything, let me know.

Regards,

Lionel

Stack overflow

Lionel Gautier — Wed, 01 May 2013 16:10:57 GMT

Hi,

I'm using developping on a CC1111 and a CC1110 using a full edition of IAR. My application gets data from RF and transmit them to an host through USB. It seems to work during few minutes, but after a few time, all my memory is step to 0xFF and I get this warning message:

The stack pointer for stack 'XdataStack' (currently XData:0xFFFF) is outside the stack range (XData:0xF000 to XData:0xF100)

If got no clue of which instruction causes this error.

Apparently I cannot use a trace with a 8051 microcontroller. Do you have any idea of how I can find which instruction causes this overflow.

Best regardes,

Lionel

CC1101: Writing to GDO0 by software

Marc Mar�� — Tue, 16 Apr 2013 16:16:25 GMT

Hello everybody

We are developing a project in which we are using a CC1101 connected through SPI to a Linux machine. The other part of the communication link is already done, and needs 9600bps connection in GFSK mode and packets AX.25 and G3RUH compatible. As CC1101 doesn't implement any of those, we have to do everything by sofware on the computer.

As G3RUH uses bit scruffing, and we need to insert bits, we cannot use FIFOs as input or output, so we are trying to use Serial Synchronous Mode, reading and writing through GDO0. As we have already done hardware integration in our system, we would like to use GDO0 only by sofware (registers), but we are only able to read GDO0 from registers.

Do you have any idea on writng to GDO0 without connecting it directly to the computer? Or do you have any idea of simplifying our problem?

Thank you in advance

SPP Demo with Stonestreet One, PIN code problem (MSP430BT5190+CC2560)

Ruben Barriuso — Fri, 01 Mar 2013 09:36:49 GMT

Hi,

I'm working with CC2560 (EZ430-RF256x evaluation kit) and Stonestreet One (Bluetooth Protocol Stack). I'm using "SPP Demo " to get knowledge about bluetooth aplications.

But I've a problem. When I insert the right pin code the device is working properly, but if I insert a wrong pin code, the device is locked and I have to reset it.

How can I detect the wrong pin code?? or, how can i solve it??

Thanks!

Using the cc430f6137 for reading passive RFID UHF passive tags

Roi Yahud — Sun, 24 Feb 2013 12:05:56 GMT

Hi,

I'm using the cc430f6137 and I'm trying to implement passive RFID reader for UHF passive tags.

Is it possible to do it with the cc430?

I'm trying to use it in 915MHz and ASK modulation.

I read somewhere the cc430 can not do that because it can not demodulate the signal from the passive tag. Is it true?

Thanks in advance.

Roi

CC2500RTK Help!

Julian Dario Luna Pati��o — Sun, 14 Apr 2013 02:39:37 GMT

Good day to all,

I wonder who can help me I'm trying to learn to make a ZigBee communication with msp430 launchpad and CC2500RTK integrated, but still not as configured, I have not found an example to guide me, or how to connect or settings.

I appreciate that I can help, my email is judlup@gmail.com.

many Thanks

L2 in EZ430-RF2500

Amer Y Abufadel — Mon, 08 Apr 2013 03:08:09 GMT

Hello all,

Can anyone tell me what are the properties of the inductor L2 (choke) between VCC_HF and VCC? The BOM states its 1uH. What is the resistance and at what frequency?

Thank you for your time and help.

problem about adc sample in cc2530

lun zhang — Wed, 10 Apr 2013 01:41:59 GMT

hi,

I set 1ms timer in cc2530, i read adc value in 1ms timer interrupt and then start adc conversion, but this influence zigbee communication.If I do not start adc conversion, zigbee communication is ok and 1ms timer work good, I think adc don't take mcu source ,but timer interrupt do.Some code is below:

HAL_ISR_FUNCTION( D_Time4_Interrupt, T4_VECTOR)

{

T4IF=0;
T4CTL=0xd9;

if(ADCCON1 & 0x80)

{

####; //read adc

}

ADCCON3=0Xa6; // if i add this instruction ,zigbee communication is not ok, but if i delete it ，communication is ok

}

CC430 with JTI Balun no RF comunication

Filip Jankun — Fri, 29 Mar 2013 13:37:14 GMT

Hello,

I've designed CC430 with integrated Balun ic from JTI. Schematic below:

CC430F5137IRGZ

CHIP ANTENNA: 0868AT43A0020

BALUN: 0868BM15C0001 without PI filter or
0896BM15A0001E with PI filter (C27,C28, L2)

There is no communication between devices and between my device and Olimex MSP430-CCRFLCD using RF Studio 7.

When I'm using two MSP430-CCRFLCD communication works without any trouble.

Any ideas ?

I'll appreciate all help.

RS232 H/W flow control on SmartRF0r EVB with CC2530EM

Raven Lee — Tue, 02 Apr 2013 04:45:12 GMT

Hi,

Somebody might help me.

I am working on general RF modem with SmartRF05EVB and CC2530EM,

My concern is h/w flow control of RS232 driver. saw that there are RTS/CTS signals connected and they have a signal during signaling RX/TX pin.

Are the RTS/CTS necessary?

Thanks.

Raven Lee

Minimum Detectable Signal Level for CC1101 Receiver

Jim A — Thu, 28 Mar 2013 22:28:14 GMT

We are using the CC1101 Low-Power Sub-1 GHz RF Transceiver chip for telemetry in the 402-405 MHz frequency range (MedRadio band). We have noticed that the distances over which we are able to achieve a reliable communications link are far less than we had anticipated. Using a signal strength meter, we find that the minimum detectable signal (MDS) for the device seems to be about -85 dBm at 100 kbaud data rate, which is far greater than the MDS values given in the data sheet.

To confirm our observations, I set up an experiment using the CC1101DK433 development kit. Two units were set up about 6 meters apart in two different rooms of a residential dwelling. Using the SmartRF studio software, the Easy Mode 434 MHz 2.4 kbaud setting was selected. Measurements were taken at the receiver unit for different values of transmit power. Results are shown in the table below.

As can be seen the MDS in this experiment appears to be on the order of -85 dBm (about what we are seeing in our application). According to the data sheet, the MDS should be between -112 dBm (for 1.2 kbaud) and -104 dBm (for 38.4 kbaud).

Tx Power (dBm) Recv’d OK Avg RSSI (dBm) Packet Error Rate

-10 224 -76.6 2.6%

-15 223 -80.1 0.4%

-20 220 -85.5 30.4%

-30 - - 100%

I realize that the matching network/balun has some loss which may not be accounted for in the MDS value given in the data sheet. I also realize that in both the application and in the experiment I performed, the device is being used in a rich multipath environment which might be having some effect. However, it seems to me that I should be getting much better results than I am getting in both scenarios. I was wondering if anyone had an explanation for the discrepancy.

CC1110 temperature sensor

Jose Antonio Deolarte — Tue, 29 Nov 2011 20:38:23 GMT

Good Afternoon,

I'm currently using the CC1110, and I'm trying to use the temperature sensor embedded in the circuit.

I'm able to obtain a readding from the sensor through the ADC (7bit), and using the table provided in the datasheet I get the temperature, but this temperature has a lot of fluctuations (more than 10°C).

Has any one implemented the temperature sensor? If so, what equation do you recomend in transforming the 7bit voltage to a temperature?

Thank you.

CC430/RF1A, Forcing restart of RX mode / SYNC word occuring in data

Johan Bodin — Tue, 26 Mar 2013 09:42:04 GMT

Hi,

I am using the RF1A to receive packets that are not fully compatible with the internal packet handler. The RF1A handles everything up to, and including, reception of the sync word while the rest of the packet is handled by software.

I have two questions:

1. If the software decides to terminate reception prematurely, and start waiting for new SYNC, which is the best/quickest way to restart the RX? SIDLE+SFRX+SRX?

2. The user's guide says "Byte synchronization is achieved by a continuous sync word search", is this sync search disabled during payload reception or is it possible to capture a new (stronger) packet that arrives in the middle of an ongoing reception of a weak signal packet?

Regards

Johan

Anyone knows about TRF2443 Integrated IF Transeiver Evaluation Module?

Giorgos Fovakis — Wed, 27 Mar 2013 17:26:57 GMT

Hi to all! I am working in a Wireless Lab and we are trying to make an upconverter and downconverter with EVM modules. I don't understand the input n' output range frequencies of transmitter and receiver of this module. If anyone can help me

George

CC430 Chronos - does not transmit data payload when Manchester = 0

Carl Prentice — Wed, 27 Mar 2013 10:24:51 GMT

Good morning all,

I have been trying to get a project working with the CC430 Chronos watch, but haven't had any joy. When the watch is set to transmit RF with Manchester encoding, the payload transmits ok, but when Manchester encoding is switched off, the payload is not transmitted. I'm sure I must be missing a setting, but I can't figure out what. I'm new to TI products as I have always used PICs, and the Chronos is my way of learning more about the CC430 which is what I would like to use in an upcoming product revision based.

I'm trying to use the hardware packet handler, with 2 sync bytes (FF FE), fixed length (2 bytes in this case), no address, and no CRC. I'm receiving with a custom receiver that outputs raw data to logic analyser. The data rate is 9600 baud, and carrier is set to 433.92MHz.

Any help in understanding what I am doing wrong would be much appreciated.

Kind regards,

Carl

My test code is as follows:

#include "timer.h"
#include "display.h"
#include "buzzer.h"
#include "radio.h"
#include "rf1a.h"
#include "pmm.h"

u8 status;

//****************************************************************************
#define PACKET_LEN (0x02) // PACKET_LEN <= 61
#define PATABLE_VAL (0x51) // 0 dBm output

const unsigned char TxBuffer[PACKET_LEN]= {0x0F, 0x0F};
//****************************************************************************

void reset_tpms(void);
void update_tpms(void);
void sx_tpms(u8 line);
void display_tpms(u8 line, u8 update);

void reset_tpms(void)
{
status = status_rf_idle;
}

void update_tpms(void)
{
}

void sx_tpms(u8 line)
{
// Increase PMMCOREV level to 2 for proper radio operation
//SetVCore(2);

ResetRadioCore();
InitRadio();

Transmit((unsigned char*)TxBuffer, sizeof TxBuffer);
}

void display_tpms(u8 line, u8 update)
{
if (update == DISPLAY_LINE_UPDATE_FULL)
{
display_chars(LCD_SEG_L2_5_0, (u8 *)" RF ", SEG_ON);
}
}

void InitRadio(void)
{
// Set the High-Power Mode Request Enable bit so LPM3 can be entered
// with active radio enabled
PMMCTL0_H = 0xA5;
PMMCTL0_L |= PMMHPMRE_L;
PMMCTL0_H = 0x00;

/*//WriteRfSettings(&rfSettings);
# Sync word qualifier mode = 16/16 sync word bits detected
# CRC autoflush = false
# Channel spacing = 199.951172
# Data format = Normal mode
# Data rate = 9.59587
# RX filter BW = 203.125000
# PA ramping = false
# Preamble count = 2
# Whitening = false
# Address config = No address check
# Carrier frequency = 433.919830
# Device address = 0
# TX power = 0
# Manchester enable = true
# CRC enable = false
# Deviation = 47.607422
# Packet length mode = Fixed packet length mode. Length configured in PKTLEN register
# Packet length = 2
# Modulation format = 2-FSK
# Base frequency = 433.919830
# Modulated = true
# Channel number = 0
*/

//
// Rf settings for CC430
//
WriteSingleReg(SYNC1,0xFF); //Sync Word, High Byte
WriteSingleReg(SYNC0,0xFE); //Sync Word, Low Byte
WriteSingleReg(PKTLEN,PACKET_LEN); //Packet Length
WriteSingleReg(PKTCTRL1,0x00);//Packet Automation Control
WriteSingleReg(PKTCTRL0,0x00);//Packet Automation Control
WriteSingleReg(FREQ2,0x10); //Frequency Control Word, High Byte
WriteSingleReg(FREQ1,0xB0); //Frequency Control Word, Middle Byte
WriteSingleReg(FREQ0,0x71); //Frequency Control Word, Low Byte
WriteSingleReg(MDMCFG4,0x88); //Modem Configuration
WriteSingleReg(MDMCFG3,0x83); //Modem Configuration
WriteSingleReg(MDMCFG2,0x02); //Modem Configuration
WriteSingleReg(MDMCFG1,0x02); //Modem Configuration
WriteSingleReg(FSCAL3,0xE9); //Frequency Synthesizer Calibration
WriteSingleReg(FSCAL2,0x2A); //Frequency Synthesizer Calibration
WriteSingleReg(FSCAL1,0x00); //Frequency Synthesizer Calibration
WriteSingleReg(FSCAL0,0x1F); //Frequency Synthesizer Calibration
WriteSingleReg(TEST0,0x09); //Various Test Settings

WritePATable(PATABLE_VAL);
}

void Transmit(unsigned char *buffer, unsigned char length)
{
RF1AIES |= BIT9;
RF1AIFG &= ~BIT9; // Clear pending interrupts
RF1AIE |= BIT9; // Enable TX end-of-packet interrupt

WriteBurstReg(RF_TXFIFOWR, buffer, length);

Strobe( RF_STX ); // Strobe STX
}

CC3000 Host Driver

Petro Petrovich — Tue, 25 Sep 2012 09:15:39 GMT

Hello. I have some questions on the work of the СС3000 Wi-Fi module.

1) The function of the wlan_ioctl_get_scan_results() works correctly? Is there a structure to return the found access points? In what units of measurement returns the parameter "RSSI"? The parameter "security mode" comes back?

2) DHCP mode is supported? Why the netapp_ipconfig() returns a non-existent IP address in the DHCP-mode?

Help me, please.

CC2540 Flash controller problem

Etienne Samain — Sat, 23 Mar 2013 04:32:10 GMT

I'm using a CC2540F128. I want to store some data in the flash memory through functions given in the osal_snc.c file. The erasePage(pg) function which is called during initNV process doesn't work. Why ?

Regards

Etienne

CC430 RF Problem

Mike_001 — Wed, 30 Nov 2011 13:18:12 GMT

Hi,

i'm using the CC430F6137 for a datalogger project and want to tranfser data from one module to another via RF.

The transmitter Modul is a EM430F6137-900 development board and the reciever Modul is the self designed datalogger board.

I strictly hold on the given Design in SLAU278 known as the Typical Application Circuit CC430F61xx but i dont get a connection.

The connection has been tested in SmartRF Studio 7 as shown in the screenshot beneath.

As you can see the RxModule does not get any Signal from TxModule even when i try different frequency's (TxModule was working while i took this image)

With two EM430F6137-900 boards there there is no problem so it finally has to be a problem on my datalogger board

Does anybody has an idea what the problem could be?

I try it since 3 day's and have no idea because the RF Part on the design is completely copied out of the applicationnotes

i'm happy for any suggestion

thank u

mike

CC430 868MHz MSK 115kBaud Packet Error Rate 45%

Daniel Wiese — Tue, 05 Mar 2013 09:58:57 GMT

Hello!

When transmitting and receiving data packets, I have a PER of about 45% at RSSI-Level -60dBm.

I think, this is very high. What value would you expect with my RF settings? Is it possible to get a PER of 1% or better?

At the moment I am developing and testing with 2 boards of the EM430F5137RF900 Evaluation set.

The RF settings are: 865MHz, 115kBaud datarate, MSK, approx. 15 Bytes packet length:

// Rf settings for CC430
WriteSingleReg(IOCFG0,0x06);     //GDO0 Output Configuration
WriteSingleReg(PKTCTRL1,0x46);   // PQT=2 (threshold = 4*2), Append Status, Address check and 0x00 broadcast
WriteSingleReg(PKTCTRL0,0x05);   // Data whitening off
WriteSingleReg(FSCTRL1,0x0C);    //Frequency Synthesizer Control
WriteSingleReg(FREQ2,0x21);     //Frequency Control Word, High Byte
WriteSingleReg(FREQ1,0x46);     //Frequency Control Word, Middle Byte
WriteSingleReg(FREQ0,0x66);     //Frequency Control Word, Low Byte
WriteSingleReg(MDMCFG4,0x6C);    //Modem Configuration
WriteSingleReg(MDMCFG2,0xF3);    //Modem Configuration
WriteSingleReg(MDMCFG1,0x20);    //Modem Configuration
WriteSingleReg(DEVIATN,0x57);    //Modem Deviation Setting
WriteSingleReg(MCSM0,0x10);     //Main Radio Control State Machine Configuration, AutoCal On
WriteSingleReg(FOCCFG,0x1D);     //Frequency Offset Compensation Configuration
WriteSingleReg(BSCFG,0x1C);     //Bit Synchronization Configuration
WriteSingleReg(AGCCTRL2,0xC7);   //AGC Control
WriteSingleReg(AGCCTRL1,0x00);   //AGC Control
WriteSingleReg(AGCCTRL0,0xB0);   //AGC Control
WriteSingleReg(WORCTRL,0xFB);    //Wake On Radio Control
WriteSingleReg(FREND1,0xB6);     //Front End RX Configuration
WriteSingleReg(FSCAL3,0xEA);     //Frequency Synthesizer Calibration
WriteSingleReg(FSCAL2,0x2A);     //Frequency Synthesizer Calibration
WriteSingleReg(FSCAL1,0x00);     //Frequency Synthesizer Calibration
WriteSingleReg(FSCAL0,0x1F);     //Frequency Synthesizer Calibration
WriteSingleReg(TEST0,0x09);     //Various Test Settings

Thank you in advance!

Best regards

Daniel Wiese

Is anybody know what's the software use to draw state diagram in cc1101 datasheet?

Bo — Wed, 06 Mar 2013 12:03:20 GMT

Now, I want write document of project, it need draw state diagram, i am try to draw state diagram with visio, but the state diagram i draw is not enough beautiful. I find the state diagram in cc1101 datasheet(picture below) is very beautiful. So I want konw what software is use to draw state diagram in cc1101 datasheet, Can TI's warm-hearted engineers tell me?