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Good evening , I want to use CC1120 in "analog FM" modulation mode.
It looks that this modulation setting is not supported from any tool like Smart RF Studio .
I am searching some application note or example that show how to set CC1120 internal registers for analog FM modulation.
Any idea ?
Many Thanks Riccardo.
I wrote a simple TX example last summer for this. We don't have a RX example. Note that effort was used to make an example that works and not on good coding.
/******************************************************************************
Filename: main_link_test.c
Description: Link test example
Notes:
******************************************************************************/
/******************************************************************************
* INCLUDES
*/
#include <msp430.h>
#include "hal_board.h"
#include "hal_led.h"
#include "hal_button.h"
#include "hal_lcd.h"
#include "trxeb_rf_spi.h"
#include "cc112x_spi.h"
#include "chip_detect.h"
#include "hal_timer_32k.h"
#include "main_graphics.c"
/******************************************************************************
* TYPEDEFS
*/
typedef struct
{
uint16 addr;
uint8 data;
} radioSetting_t;
/******************************************************************************
* LOCAL FUNCTIONS
*/
static void AFMISR(void);
/******************************************************************************
* GLOBAL VARIABLES
*/
uint8 mclkFrequency;
uint8 writeByte,chipStatus,mode;
uint8 arrayCounter = 1;
uint8 randCounter = 1;
uint8 freqArray0[16];
uint8 freqArray1[16];
uint8 randArray[] = {0x0, 0x1, 0x1, 0x1, 0x0, 0x0, 0x0, 0x1, 0x1, 0x1, 0x0, 0x1, 0x0, 0x1,0x0, 0x0};
static const radioSetting_t cc112xTestRfSettings[] =
{
/***************************************************************
* SmartRF Studio(tm) Export
*
* Radio register settings specifed with C-code
* compatible #define statements.
*
***************************************************************/
{CC112X_IOCFG3 ,0x08},
{CC112X_IOCFG2 ,0x09},
{CC112X_IOCFG1 ,0xB0},
{CC112X_IOCFG0 ,0xB0},
{CC112X_SYNC_CFG1 ,0x08},
{CC112X_MODCFG_DEV_E ,0x03},
{CC112X_DCFILT_CFG ,0x1C},
{CC112X_PREAMBLE_CFG1 ,0x14},
{CC112X_IQIC ,0xC4},
{CC112X_CHAN_BW ,0x28},
{CC112X_MDMCFG1 ,0x06},
{CC112X_MDMCFG0 ,0x0A},
{CC112X_DRATE2 ,0x43},
{CC112X_DRATE1 ,0xA9},
{CC112X_DRATE0 ,0x2A},
{CC112X_AGC_REF ,0x20},
{CC112X_AGC_CS_THR ,0x19},
{CC112X_AGC_CFG1 ,0xAF},
{CC112X_AGC_CFG0 ,0xCF},
{CC112X_FIFO_CFG ,0x00},
{CC112X_FS_CFG ,0x12},
{CC112X_PKT_CFG2 ,0x05},
{CC112X_PKT_CFG1 ,0x00},
{CC112X_PKT_CFG0 ,0x20},
{CC112X_PA_CFG2 ,0x78},
{CC112X_PA_CFG0 ,0x7C},
{CC112X_IF_MIX_CFG ,0x04},
{CC112X_FREQOFF_CFG ,0x22},
{CC112X_FREQ2 ,0xD8},
{CC112X_FREQ1 ,0x80},
{CC112X_IF_ADC0 ,0x04},
{CC112X_FS_DIG0 ,0x5F},
{CC112X_FS_CAL2 ,0x20},
{CC112X_FS_CAL0 ,0x0F},
{CC112X_FS_CHP ,0x16},
{CC112X_FS_DIVTWO ,0x01},
{CC112X_FS_DSM1 ,0x0B},
{CC112X_FS_DSM0 ,0x30},
{CC112X_FS_DVC1 ,0xFF},
{CC112X_FS_DVC0 ,0x1F},
{CC112X_FS_PFD ,0x51},
{CC112X_FS_PRE ,0x1F},
{CC112X_FS_REG_DIV_CML ,0x1D},
{CC112X_FS_VCO0 ,0x81},
{CC112X_XOSC3 ,0xC7},
{CC112X_XOSC1 ,0x0F},
{CC112X_RSSI1 ,0x80},
{CC112X_MARCSTATE ,0x41},
{CC112X_PQT_SYNC_ERR ,0xFF},
{CC112X_AGC_GAIN2 ,0xD1},
{CC112X_AGC_GAIN0 ,0x3F},
{CC112X_ASK_SOFT_RX_DATA ,0x30},
{CC112X_RNDGEN ,0x7F},
{CC112X_CHFILT_I2 ,0x08},
{CC112X_FSCAL_CTRL ,0x01},
{CC112X_PARTNUMBER ,0x58},
{CC112X_PARTVERSION ,0x10},
{CC112X_RX_STATUS ,0x10},
{CC112X_DVC_TEST ,0x0B},
{CC112X_XOSC_TEST1 ,0x0C},
{CC112X_FIFO_NUM_TXBYTES ,0x0F},
};
/******************************************************************************
* @fn main
*
* @brief Main handles all application menus
*
* @param none
*
* @return none
******************************************************************************/
uint8 chipState;
int16 rssiComp;
volatile int8 rssi;
int8 rssi1;
uint8 rssi_readout;
volatile uint8 pqtSyncError;
uint8 pqtSyncError1;
uint8 cc112xRssiOffset = 101;
void main( void )
{
// Set freqArray0
freqArray0[0] =0xFF;
freqArray0[1] =0xFD;
freqArray0[2] =0xF9;
freqArray0[3] =0xF2;
freqArray0[4] =0xE7;
freqArray0[5] =0xDB;
freqArray0[6] =0xCE;
freqArray0[7] =0xC4;
freqArray0[8] =0xC4;
freqArray0[9] =0xCE;
freqArray0[10]=0xDB;
freqArray0[11]=0xE7;
freqArray0[12]=0xF2;
freqArray0[13]=0xF9;
freqArray0[14]=0xFD;
freqArray0[15]=0xFF;
// Set freqArray1
freqArray1[0] =0x01;
freqArray1[1] =0x03;
freqArray1[2] =0x07;
freqArray1[3] =0x0E;
freqArray1[4] =0x19;
freqArray1[5] =0x25;
freqArray1[6] =0x32;
freqArray1[7] =0x3C;
freqArray1[8] =0x3C;
freqArray1[9] =0x32;
freqArray1[10]=0x25;
freqArray1[11]=0x19;
freqArray1[12]=0x0E;
freqArray1[13]=0x07;
freqArray1[14]=0x03;
freqArray1[15]=0x01;
// Stop watchdog timer to prevent time out reset
WDTCTL = WDTPW + WDTHOLD;
/* Settingcapacitor values for XT1, 32768 Hz */
halBoardStartXT1();
//Enable global interrupt
_BIS_SR(GIE);
/* Clocks:
* mclk = mclkFrequency
* smclk = mclkFrequency
* aclk = 32768 Hz
*/
mclkFrequency = SYSCLK_16MHZ;
halBoardSetSystemClock(mclkFrequency);
/* Care must be taken when handling power modes
* - Peripheral units can request clocks and have them granted even if
* the system is in a power mode. Peripheral clock request is enabled
* as default.
* - Per test only needs ACLK to be enabled to timers
* during power mode operation
*/
halBoardDisablePeripheralClockRequest((MCLKREQEN+SMCLKREQEN));
// SPI flash uses same SPI interface as LCD -- we'll disable the SPI flash
P8SEL &= BIT6; //ioflash_csn = gp.
P8DIR |= BIT6; //tpflash_csn = ouut.
P8OUT |= BIT6; //flash_csn = 1.
// Initialize buttons
halButtonsInit();
// Enable button interrupt
halButtonsInterruptEnable();
// Initialize LED's
halLedInit();
// Initialize LCD
halLcdInit();
//Clear display
halLcdClear(0);
halLcdSendBuffer(0);
/* Issue trxeb tranceiver RF spi interface */
trxRfSpiInterfaceInit(mclkFrequency);
//chipType = trxDetectChipType();
// Read version id to determine which settings to be used
//cc112xSpiReadReg(CC112X_PARTVERSION, &chipVersion,1);
halLcdClear(0);
halLcdPrintString(0," Analog FM ",0,1);
halLcdPrintString(0," Demonstration ",0,2);
halLcdPrintString(0," ",0,3);
halLcdPrintString(0," Press button for ",0,4);
halLcdPrintString(0," continuous TX ",0,5);
/* Display choices */
halLcdSendBuffer(0);
/* sleep...*/
__low_power_mode_3();
mode = halButtonsPushed();
/* Configure Radio */
for(uint16 i = 0; i < (sizeof cc112xTestRfSettings/sizeof(radioSetting_t));i++)
{
writeByte = cc112xTestRfSettings[i].data;
cc112xSpiWriteReg( cc112xTestRfSettings[i].addr,&writeByte,1);
}
// Calibrate
trxSpiCmdStrobe(SCAL);
//Enable analog AM
writeByte = 0x01;
cc112xSpiWriteReg(CC112X_SOFT_TX_DATA_CFG, &writeByte,1);
// Make sure the radio is in IDLE
trxSpiCmdStrobe(SIDLE);
// Set radio in continuous TX
trxSpiCmdStrobe(STX);
//Interrupt function
trxIsrConnect(&AFMISR);
trxEnableInt();
// Display state of radio
halLcdClear(0);
halLcdPrintString(0," Radio in TX ",0,2);
halLcdPrintString(0," ",0,3);
halLcdPrintString(0," (Continuous mode)",0,4);
halLcdPrintString(0," ",0,5);
halLcdSendBuffer(0);
while(1);
}
/***********************************************************************************
* @fn radioRXISR
*
* @brief ISR for packet handling in RX
*
* @param none
*
* @return none
*/
static void AFMISR(void)
{
trxClearIntFlag();
if (randArray[randCounter] == 0 )
{
writeByte = freqArray0[arrayCounter];
cc112xSpiWriteReg(CC112X_SOFT_TX_DATA_IN, &writeByte,1);
}
else
{
writeByte = freqArray1[arrayCounter];
cc112xSpiWriteReg(CC112X_SOFT_TX_DATA_IN, &writeByte,1);
}
arrayCounter++;
if (arrayCounter == 16 )
{
arrayCounter = 1;
randCounter++;
if (randCounter == 16)
{
randCounter = 1;
}
}
}
/***********************************************************************************
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IMPORTANT: Your use of this Software is limited to those specific rights
granted under the terms of a software license agreement between the user
who downloaded the software, his/her employer (which must be your employer)
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limits your use, and you acknowledge, that the Software may not be modified,
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