CC1125: CC1125 RF

To be able to answer that question you need as a minimum to provide an example of the data you are trying to send/ receive. 

As per RF studio 

10:10:59.842 | 64 | 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f 40 41 42 43 44 45 46 47 48 49 e7 2a 38 34 ae f1 7a 14 ad e6 96 55 0a cd 51 55 52 35 4a 9d 65 5b a1 ad 5f 4c 93 | -78 CRC error

above data is in hex format and upto value 48-49  is correct and after that its corrupted upto 100 bytes 

If I understand correctly, everything works fine with Studio  for TX and RX, but with your custom TX code + Studio RX, you receive wrong data. Is that correct?

If yes, please share your code showing how your write your packet to the TX FIFO and do the TX.

Siri

Yes, your understanding is correct, 

Code is simple

for(i=1; i<(Buff_Size+1); i++)
{
Tx_buff[i] = i;
}
trxSpiCmdStrobe(CC112X_SFTX);         // Flush Tx buffer
Delay(60000);//

cc112xSpiWriteTxFifo(Tx_buff, (Buff_Size+1));      // buff_size + frame lenght size at start of frame

// Strobe TX to send packet
trxSpiCmdStrobe(CC112X_STX);               // Change Tx state

Delay(60000);
trxSpiCmdStrobe(CC112X_SIDLE);           // Change Ideal State

buff_size =100

I

Initially set the config register as below

static const registerSetting_t preferredSettings[] ={
{CC112X_IOCFG3, 0xB0},
{CC112X_IOCFG2, 0x06},
{CC112X_IOCFG1, 0xB0},
{CC112X_IOCFG0, 0x40},
{CC112X_SYNC_CFG1, 0x08},
{CC112X_DEVIATION_M, 0x3A},
{CC112X_MODCFG_DEV_E, 0x0B},
{CC112X_DCFILT_CFG, 0x1C},
{CC112X_FREQ_IF_CFG, 0x33},
{CC112X_IQIC, 0xC6},
{CC112X_CHAN_BW, 0x0A},
{CC112X_MDMCFG0, 0x05},
{CC112X_SYMBOL_RATE2, 0x6F},
{CC112X_SYMBOL_RATE1, 0x75},
{CC112X_SYMBOL_RATE0, 0x10},
{CC112X_AGC_REF, 0x20},
{CC112X_AGC_CS_THR, 0x19},
{CC112X_AGC_CFG1, 0xA9},
{CC112X_AGC_CFG0, 0xCF},
{CC112X_FIFO_CFG, 0x00},
{CC112X_SETTLING_CFG, 0x03},
{CC112X_FS_CFG, 0x12},
{CC112X_PKT_CFG0, 0x20},
{CC112X_PA_CFG0, 0x7E},
{CC112X_PKT_LEN, 0xFF},
{CC112X_IF_MIX_CFG, 0x00},
{CC112X_FREQOFF_CFG, 0x22},
{CC112X_FREQ2, 0x56},
{CC112X_FREQ1, 0xCC},
{CC112X_FREQ0, 0xCC},
{CC112X_IF_ADC0, 0x05},
{CC112X_FS_DIG1, 0x00},
{CC112X_FS_DIG0, 0x5F},
{CC112X_FS_CAL0, 0x0E},
{CC112X_FS_DIVTWO, 0x03},
{CC112X_FS_DSM0, 0x33},
{CC112X_FS_DVC0, 0x17},
{CC112X_FS_PFD, 0x50},
{CC112X_FS_PRE, 0x6E},
{CC112X_FS_REG_DIV_CML, 0x14},
{CC112X_FS_SPARE, 0xAC},
{CC112X_XOSC5, 0x0E},
{CC112X_XOSC3, 0xC7},
{CC112X_XOSC1, 0x07},
{CC112X_PARTNUMBER, 0x58},
{CC112X_PARTVERSION, 0x21},
{CC112X_MODEM_STATUS1, 0x10},
{CC112X_XOSC_TEST1, 0x00},
};

and enable the manual calibration and finally send data