/etc... RF

Forum Post: RE: Can't open CC2540EM reference design

TER — Thu, 16 May 2013 19:39:00 GMT

All files for using CadStart are included. Which libraries are you referring to?

Forum Post: RE: CC4000 GPS module

Denis Lalonde — Wed, 15 May 2013 20:49:00 GMT

As any GPS a good satellite signall is require , so a open sky is the best.

Try a comercial GPS in your lab and if you do not recive signal you have your responce.

Forum Post: RE: Connection between two RF modules CC3000

Jean-Christophe Billard — Wed, 15 May 2013 14:59:00 GMT

Hi Alessandro,

Looks like this is not possible. I had the same question, but got the answear from a TI employee that it is not possible yet.

(I was told that it should be possible in a near future though, cf my thread: http://e2e.ti.com/support/low_power_rf/f/851/p/233233/838982.aspx#838982)

Regards,

Jean

Forum Post: CC2550 not wake up - Help

tan pham ngoc — Tue, 14 May 2013 10:41:00 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 );
}

Forum Post: ADC Input Impedance Matching

Janus Davidson — Mon, 13 May 2013 22:23:00 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.

Forum Post: SD Card

Lionel Gautier — Thu, 02 May 2013 20:29:00 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

Forum Post: RE: Stack overflow

Lionel Gautier — Wed, 01 May 2013 21:46:00 GMT

I've already try to use "stack usage tracking" but it didn't give me "graphical" information, just warning once the memory was overflowed and not the last instruction before the crash. I might have missed something. I'll retry as soon as I've access to my dev.

I've also already try to debug with breakpoints. All I could find was a stack overflow after the instuction : RFST = SRX; in mrfi_radio.c. This instruction just set the SFR register RFST to 0x02. How could it overflows my memory?

Lionel

Forum Post: CC1101: Writing to GDO0 by software

Marc Mar�� — Tue, 16 Apr 2013 16:16:00 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

Forum Post: RE: SPP Demo with Stonestreet One, PIN code problem (MSP430BT5190+CC2560)

Ruben Barriuso — Mon, 15 Apr 2013 15:21:00 GMT

Hi,

Very thank you for your help.

Best regards.

Ruben

Forum Post: RE: Using the cc430f6137 for reading passive RFID UHF passive tags

Dipti Bhoir — Sun, 14 Apr 2013 06:36:00 GMT

Dear TA12012,

we are trying to Design Passive UHF RFID Reader Based on CC430 + PA and receiver circuitry if required , i will be more than happy to here from you n mail.

Regards,

Dipti

Forum Post: CC2500RTK Help!

Julian Dario Luna Pati��o — Sun, 14 Apr 2013 02:39:00 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

Forum Post: RE: L2 in EZ430-RF2500

Amer Y Abufadel — Thu, 11 Apr 2013 03:19:00 GMT

Anyone??

Forum Post: problem about adc sample in cc2530

lun zhang — Wed, 10 Apr 2013 01:41:00 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

}

Forum Post: RE: CC430 with JTI Balun no RF comunication

Filip Jankun — Mon, 08 Apr 2013 19:54:00 GMT

Yes, I'm using two debuggers and two computers standing next to each other.

Forum Post: RS232 H/W flow control on SmartRF0r EVB with CC2530EM

Raven Lee — Tue, 02 Apr 2013 04:45:00 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

Forum Post: RE: Minimum Detectable Signal Level for CC1101 Receiver

TER — Fri, 29 Mar 2013 16:32:00 GMT

It should be possible to measure the same sensitivity as stated in the datasheet with two CC1101 EMs in an controlled environment. Have you tried to measure the background noise floor where you conduct the test? An easy and fast indication would be to set one of the EMs in cont RX without turning the TX side on and see what the average RSSI level is. This should be weill below -100dBm normally.

Forum Post: RE: CC1110 temperature sensor

JDBC — Thu, 28 Mar 2013 18:56:00 GMT

This post is old, but here is what I use based on DN102 (SWRA101A):

/* Temperature sensor variables and constants */
#define tConst 0.61065 // (1250/2047)
#define tCoeff 2.54 // coefficient from datasheet
static __xdata float tOutputV;
static __xdata uint16 tADCResult;
static __xdata float tResultC;

/* Temperature sensor constants offset */
#define tOffset 773 //(temperatareOutputAtZeroDegC + temperatureOffsetAt24DegC)

do{
// Set [ADCCON2.SREF/SDIV/SCH] bits according to ADC configuration */
ADCCON2 = (ADCCON2_SREF_1_25V | ADCCON2_SDIV_512 | ADCCON2_SCH_TEMPR);

// Set [ADCCON1.ST/STSEL] bits according to ADC configuration and start converstion*/
ADCCON1 = (ADCCON1_ST | ADCCON1_STSEL);

while(!(ADCCON1 & 0x80));

tADCResult = ADCL;
tADCResult |= (((unsigned int)ADCH) << 8);
} while(0);

// Conversion result located in MSB section of ADCH:ADCL
tADCResult >>= 4; // Shift 4 due to 12 bits resolution

tOutputV = tADCResult * tConst;

tResultC = (tOutputV - tOffset)/tCoeff;

tResultF = (uint16)((tResultC*9/5)+32);

Forum Post: RE: CC430/RF1A, Forcing restart of RX mode / SYNC word occuring in data

Johan Bodin — Wed, 27 Mar 2013 21:52:00 GMT

Thanks TER!

Forum Post: Anyone knows about TRF2443 Integrated IF Transeiver Evaluation Module?

Giorgos Fovakis — Wed, 27 Mar 2013 17:26:00 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

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

Carl Prentice — Wed, 27 Mar 2013 10:24:00 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
}