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CC2500 Self-made modules Problem.

Hunter Wang
Expert 1100 points

Other Parts Discussed in Thread: CC2500, TEST2

Hi，Dear ti

 

I have a Question. About the CC2500 issue.

We made a CC2500 module By third party.

But when we testing , there is a problem happen.

 

The Third party made CC2500 module can’t communication With TI EZ430 Tools!!!  

No matter what TX or RX, GDO0 no any Active. Even the Register setting the same with

EZ430& Third party made CC2500 moudle.

But if TX&RX all use the Third party CC2500 module, it’s OK!!!

 

So I want to know, This could happen?

TX&RX all CC2500, But PCB &Antenna Design not the same.

Then cause Different module can’t communication??

  • 0
    TI__Expert 6825 points

    Hunter,

    It sounds like you have a frequency offset between your module and the TI EZ430. Do you have a spectrum analyzer? If so, check the frequency of both HW platforms when out putting the same frequency. 

    -Per H

  • 0 in reply to Per H
    Expert 1100 points

    hI Per H

     

    Thank for you help First.

    But I use the Smart RF Counter Test The TX\RX Frequency of Both(TI EZ430 & Third party 2500 module).

    But The Frequency all in 2432.5MHz or 2432.6MHz.

    Seem like not frequency offset.

    My 2500 Register Set as below:

    #define TI_CC2500_IOCFG2_value    0x29
    #define TI_CC2500_IOCFG1_value    0x2E
    #define TI_CC2500_IOCFG0_value    0x06
    #define TI_CC2500_FIFOTHR_value    0x07
    #define TI_CC2500_SYNC1_value    0xD3
    #define TI_CC2500_SYNC0_value    0x91
    #define TI_CC2500_PKTLEN_value    0xFF
    #define TI_CC2500_PKTCTRL1_value    0x04
    #define TI_CC2500_PKTCTRL0_value    0x05
    #define TI_CC2500_ADDR_value    0x00
    #define TI_CC2500_CHANNR_value    0x00
    #define TI_CC2500_FSCTRL1_value    0x07
    #define TI_CC2500_FSCTRL0_value    0x00
    #define TI_CC2500_FREQ2_value    0x5D
    #define TI_CC2500_FREQ1_value    0x93
    #define TI_CC2500_FREQ0_value    0xB1
    #define TI_CC2500_MDMCFG4_value    0x2D
    #define TI_CC2500_MDMCFG3_value    0x3B
    #define TI_CC2500_MDMCFG2_value    0x73
    #define TI_CC2500_MDMCFG1_value    0x22
    #define TI_CC2500_MDMCFG0_value    0xF8
    #define TI_CC2500_DEVIATN_value    0x01
    #define TI_CC2500_MCSM2_value    0x07
    #define TI_CC2500_MCSM1_value      0x30
    #define TI_CC2500_MCSM0_value      0x18
    #define TI_CC2500_FOCCFG_value    0x1D
    #define TI_CC2500_BSCFG_value    0x1C
    #define TI_CC2500_AGCCTRL2_value    0xC7
    #define TI_CC2500_AGCCTRL1_value    0x00
    #define TI_CC2500_AGCCTRL0_value    0xB0
    #define TI_CC2500_WOREVT1_value    0x87
    #define TI_CC2500_WOREVT0_value    0x6B
    #define TI_CC2500_WORCTRL_value    0xF8
    #define TI_CC2500_FREND1_value    0xB6
    #define TI_CC2500_FREND0_value    0x10
    #define TI_CC2500_FSCAL3_value    0xEA
    #define TI_CC2500_FSCAL2_value    0x0A
    #define TI_CC2500_FSCAL1_value    0x00
    #define TI_CC2500_FSCAL0_value    0x11
    #define TI_CC2500_RCCTRL1_value    0x41
    #define TI_CC2500_RCCTRL0_value    0x00
    #define TI_CC2500_FSTEST_value    0x59
    #define TI_CC2500_PTEST_value    0x7F
    #define TI_CC2500_AGCTEST_value    0x3F
    #define TI_CC2500_TEST2_value    0x88
    #define TI_CC2500_TEST1_value    0x31
    #define TI_CC2500_TEST0_value    0x0B

  • 0 in reply to Hunter Wang
    TI__Expert 3595 points

    Does the module use the same crystal and crystal loading capacitors as the EZ430 modules?  The programmed frequency depends on the exact crystal frequency which can be off if the crystal loading is incorrect or if the crystal has a different tolerence than the EZ430 module.  So even when programmed to the same frequency, the actual frequency is different.  The spectrum analyzer can measure the absolute frequency and see if offsets are the problem.