CC1125 frequency registers NOT change

I assume that when you do initialization you manage to read back correct values from the chip. Reading out PARTVERSION and PARTNUMBER is a good test to see if the SPI read works.

Where in your code do you try to set the FREQ word? Is the radio in IDLE?

I assume that when you do initialization you manage to read back correct values from the chip. Reading out PARTVERSION and PARTNUMBER is a good test to see if the SPI read works. 

At this moment I cannot check this registers. But I have tried to write -> wait a moment -> and then read the register and it works OK.

___________________________

Where in your code do you try to set the FREQ word? Is the radio in IDLE?

The frequency change is made in file tal_pib.c, in function tal_pib_set (it is too long to paste here). The parameter is called 'phyCurrentChannel' (line #421 of previous indicated file). This is the fragment:

(...)
                case phyCurrentChannel:
                    if (tal_state != TAL_IDLE)
                    {
                        return TAL_BUSY;
                    }
                    if ((uint32_t)TRX_SUPPORTED_CHANNELS & ((uint32_t)0x01 << value->pib_value_8bit))
                    {
                        tal_trx_status_t previous_trx_status = TRX_OFF;
                        /*
                         * Set trx to "soft" off avoiding that ongoing
                         * transaction (e.g. ACK) are interrupted.
                         */
                        if (tal_trx_status != TRX_OFF)
                        {
                            previous_trx_status = RX_AACK_ON;   /* any other than TRX_OFF state */
                            do
                            {
                                /* set TRX_OFF until it could be set;
                                 * trx might be busy */
                            } while (set_trx_state(CMD_TRX_OFF) != TRX_OFF);
                        }
                        tal_pib_CurrentChannel = value->pib_value_8bit;
                        pal_trx_bit_write(SR_CHANNEL, tal_pib_CurrentChannel);
                        /* Re-store previous trx state */
                        if (previous_trx_status != TRX_OFF)
                        {
                            /* Set to default state */
                            set_trx_state(CMD_RX_AACK_ON);
                        }
                    }
                    else
                    {
                        return MAC_INVALID_PARAMETER;
                    }
                    break;
(...)

As far as I can see this is some functions taken from Atmels 802.15.4 MAC. It's not possible for me to see how this code actually sets the FREQ registers. Please provide a plot of the SPI bus traffic writing and reading back the FREQ registers.

At this moment I can not measure the SPI bus to check data.

Which state should be the transceiver? The 'tal_pib_set' function checks if TAL is idle:

typedef enum tal_state_tag
{
    TAL_IDLE           = 0,
    TAL_ACK_PRE_TX     = 1,
    TAL_ACK_TX         = 2,
    TAL_TX_AUTO        = 3,
    TAL_TX_WAIT_ACK    = 4,
    TAL_TX_RETRY       = 5,
    TAL_TX_DONE        = 6,
    TAL_SLOTTED_CSMA   = 7,
    TAL_ED_RUNNING     = 8,
    TAL_ED_DONE        = 9
} SHORTENUM tal_state_t;

And it checks the transceiver commands:

/** Transceiver commands */
typedef enum trx_cmd_tag
{
    /** Reset chip */
    SRES                        = (0x30),
    
    /** Enable and calibrate frequency synthesizer */
    SFSTXON                     = (0x31),
    
    /** Enter XOFF state when CSn is de-asserted */
    SXOFF                       = (0x32),
    
    /** Calibrate frequency synthesizer and turn it off */
    SCAL                        = (0x33),
    
    /** Enable RX */
    SRX                         = (0x34),
    
    /** Enable TX */
    STX                         = (0x35),
    
    /** Exit RX/TX, turn off frequency synthesizer and exit eWOR mode if applicable */
    SIDLE                       = (0x36),
    
    /** Automatic Frequency Compensation */
    SAFC                        = (0x37),
    
    /** Start automatic RX polling sequence (eWOR) */
    SWOR                        = (0x38),
    
    /** Enter SLEEP mode when CSn is de-asserted */
    SPWD                        = (0x39),
    
    /** Flush the RX FIFO. Only issue SFRX in IDLE or RX_FIFO_ERR states */
    SFRX                        = (0x3A),
    
    /** Flush the TX FIFO. Only issue SFTX in IDLE or TX_FIFO_ERR states */
    SFTX                        = (0x3B),
    
    /** Reset the eWOR timer to the Event1 value */
    SWORRST                     = (0x3C),
    
    /** No operation. May be used to get access to the chip status byte */
    SNOP                        = (0x3D)
} SHORTENUM trx_cmd_t;

I guess transceiver must be awake to change registers...

Jose,

I think for us to be of any help you will need to produce a plot of what is on the SPI bus between the two devices.

Regards,
/TA

Hello,

Now the registers changes work. I think it was a problem of transceiver status (it must be idle and awake).

Regards,
Jose A.