Hardware: Arduino Uno & CC1120 https://www.mikroe.com/ccrf-3-click
https://en.wikipedia.org/wiki/Continuous_Tone-Coded_Squelch_System
437 MHz
2-FSK
Deviation: 7.492065 kHz
Synchronous serial mode
In synchronous serial mode the TX data must be set up on the falling edge of the data clock output
from CC112X.
In addition to set PKT_CFG2.PKT_FORMAT = 1, the following register fields must be set:
MDMCFG1.FIFO_EN = 0
MDMCFG0.TRANSPARENT_MODE_EN = 0
IOCFGx.GPIOx_CFG = 001001b (SERIAL_RX. Only necessary for RX mode)
IOCFGx.GPIOx_CFG = 001000b (SERIAL_CLK)
SERIAL_STATUS.IOC_SYNC_PINS_EN = 1 (Only necessary for TX mode17)
Enable synchronizer for IO pins. Required for transparent TX and for reading
GPIO_STATUS.GPIO_STATE
PREAMBLE_CFG1.NUM_PREAMBLE = 0
CC1120 IOCFG0 GPIO0 pin connected to Arduino Uno digital pin 2
CC1120 IOCFG0 configured for SERIAL_CLK
Serial clock (RX and TX mode). Synchronous to the data in synchronous
serial mode. Data is set up on the falling edge in RX and is captured on
the rising edge of the serial clock in TX
#include <SPI.h>
#include "cc1120.h"
#define PRINT_INFO 1
struct cc_status {
uint8_t res : 4;
uint8_t state : 3;
uint8_t chip_ready : 1;
};
union cc_st {
struct cc_status ccst;
uint8_t v;
};
union cc_st ccstatus;
void setup() {
Serial.begin(9600);
pinMode(RESET_PIN, OUTPUT);
pinMode(SS_PIN, OUTPUT);
pinMode(GDO0_PIN, OUTPUT);
digitalWrite(SS_PIN, HIGH);
digitalWrite(RESET_PIN, HIGH);
SPI.begin();
strobeSPI(SNOP);
#ifdef PRINT_INFO
printStatus();
#endif
// Preamble off
uint8_t v = readSPI(PREAMBLE_CFG0);
bitClear(v, 5);
writeSPI(PREAMBLE_CFG0, v);
// Sync off
v = readSPI(SYNC_CFG0);
bitClear(v, 4);
bitClear(v, 3);
bitClear(v, 2);
writeSPI(SYNC_CFG0, v);
writeSPI(IOCFG0, SERIAL_CLK);
writeSPI(SYNC_CFG1, SMARTRF_SETTING_SYNC_CFG1);
writeSPI(MODCFG_DEV_E, SMARTRF_SETTING_MODCFG_DEV_E);
writeSPI(DCFILT_CFG, SMARTRF_SETTING_DCFILT_CFG);
writeSPI(PREAMBLE_CFG1, SMARTRF_SETTING_PREAMBLE_CFG1);
writeSPI(IQIC, SMARTRF_SETTING_IQIC);
writeSPI(CHAN_BW, SMARTRF_SETTING_CHAN_BW);
writeSPI(MDMCFG0, SMARTRF_SETTING_MDMCFG0);
writeSPI(MDMCFG1, SMARTRF_SETTING_MDMCFG1);
writeSPI(AGC_REF, SMARTRF_SETTING_AGC_REF);
writeSPI(AGC_CS_THR, SMARTRF_SETTING_AGC_CS_THR);
writeSPI(AGC_CFG1, SMARTRF_SETTING_AGC_CFG1);
writeSPI(FIFO_CFG, SMARTRF_SETTING_FIFO_CFG);
writeSPI(FS_CFG, SMARTRF_SETTING_FS_CFG);
writeSPI(PKT_CFG0, SMARTRF_SETTING_PKT_CFG0);
writeSPI(PKT_CFG1, SMARTRF_SETTING_PKT_CFG1);
writeSPI(PKT_CFG2, SMARTRF_SETTING_PKT_CFG2);
writeSPI(PA_CFG2, SMARTRF_SETTING_PA_CFG2);
writeSPI(PA_CFG1, SMARTRF_SETTING_PA_CFG1);
writeSPI(PA_CFG0, SMARTRF_SETTING_PA_CFG0);
writeSPI(DEVIATION_M, SETTING_DEVIATION_M);
writeExtAddrSPI(IF_MIX_CFG, SMARTRF_SETTING_IF_MIX_CFG);
writeExtAddrSPI(FREQOFF_CFG, SMARTRF_SETTING_FREQOFF_CFG);
writeExtAddrSPI(FREQ2, SMARTRF_SETTING_FREQ2);
writeExtAddrSPI(FREQ1, SMARTRF_SETTING_FREQ1);
writeExtAddrSPI(FREQ0, SMARTRF_SETTING_FREQ0);
writeExtAddrSPI(FS_DIG1, SMARTRF_SETTING_FS_DIG1);
writeExtAddrSPI(FS_DIG0, SMARTRF_SETTING_FS_DIG0);
writeExtAddrSPI(FS_CAL1, SMARTRF_SETTING_FS_CAL1);
writeExtAddrSPI(FS_CAL0, SMARTRF_SETTING_FS_CAL0);
writeExtAddrSPI(FS_DIVTWO, SMARTRF_SETTING_FS_DIVTWO);
writeExtAddrSPI(FS_DSM0, SMARTRF_SETTING_FS_DSM0);
writeExtAddrSPI(FS_DVC0, SMARTRF_SETTING_FS_DVC0);
writeExtAddrSPI(FS_PFD, SMARTRF_SETTING_FS_PFD);
writeExtAddrSPI(FS_PRE, SMARTRF_SETTING_FS_PRE);
writeExtAddrSPI(FS_REG_DIV_CML, SMARTRF_SETTING_FS_REG_DIV_CML);
writeExtAddrSPI(FS_SPARE, SMARTRF_SETTING_FS_SPARE);
writeExtAddrSPI(FS_VCO0, SMARTRF_SETTING_FS_VCO0);
writeExtAddrSPI(XOSC5, SMARTRF_SETTING_XOSC5);
writeExtAddrSPI(XOSC1, SMARTRF_SETTING_XOSC1);
writeExtAddrSPI(SERIAL_STATUS, SMARTRF_SETTING_SERIAL_STATUS);
#ifdef PRINT_INFO
v = readExtAddrSPI(PARTVERSION);
Serial.print(F("PARTVERSION "));
Serial.println(v, HEX);
v = readExtAddrSPI(PARTNUMBER);
Serial.print(F("PARTNUMBER "));
Serial.println(v, HEX);
#endif
strobeSPI(STX);
delay(50);
v = readExtAddrSPI(MARCSTATE);
Serial.print(F("MARCSTATE "));
Serial.println(v, BIN);
}
void loop() {
tone(GDO0_PIN, CTCSS_TONE, TONE_DURATION);
delay(3000);
}
void printStatus() {
Serial.println();
Serial.print(F("Chip ready: "));
Serial.println(ccstatus.ccst.chip_ready, HEX);
Serial.print(F("State: "));
Serial.println(ccstatus.ccst.state, HEX);
Serial.println();
}
uint8_t readSPI(uint8_t addr) {
digitalWrite(SS_PIN, LOW);
ccstatus.v = SPI.transfer(R_BIT | addr);
uint8_t v = SPI.transfer(0x00);
digitalWrite(SS_PIN, HIGH);
return v;
}
void writeSPI(uint8_t addr, uint8_t value) {
digitalWrite(SS_PIN, LOW);
ccstatus.v = SPI.transfer(addr);
ccstatus.v = SPI.transfer(value);
digitalWrite(SS_PIN, HIGH);
}
void strobeSPI(uint8_t cmd)
{
digitalWrite(SS_PIN, LOW);
ccstatus.v = SPI.transfer(R_BIT | cmd);
digitalWrite(SS_PIN, HIGH);
}
uint8_t readExtAddrSPI(uint8_t addr) {
uint8_t v;
digitalWrite(SS_PIN, LOW);
ccstatus.v = SPI.transfer(R_BIT | EXT_ADDR);
SPI.transfer(addr);
v = SPI.transfer(0xff);
digitalWrite(SS_PIN, HIGH);
return v;
}
void writeExtAddrSPI(uint8_t addr, uint8_t value) {
digitalWrite(SS_PIN, LOW);
ccstatus.v = SPI.transfer(EXT_ADDR);
ccstatus.v = SPI.transfer(addr);
ccstatus.v = SPI.transfer(value);
digitalWrite(SS_PIN, HIGH);
}
/***************************************************************
* SmartRF Studio(tm) Export
*
* Radio register settings specifed with C-code
* compatible #define statements.
*
* RF device: CC1120
*
***************************************************************/
#ifndef SMARTRF_CC1120_H
#define SMARTRF_CC1120_H
#define SMARTRF_RADIO_CC1120
//#define SMARTRF_SETTING_IOCFG3 0xB0
//#define SMARTRF_SETTING_IOCFG2 0x08
//#define SMARTRF_SETTING_IOCFG1 0xB0
//#define SMARTRF_SETTING_IOCFG0 0x09
//#define SMARTRF_SETTING_SYNC3 0xAA
//#define SMARTRF_SETTING_SYNC2 0xAA
//#define SMARTRF_SETTING_SYNC1 0xAA
//#define SMARTRF_SETTING_SYNC0 0xAA
#define SMARTRF_SETTING_SYNC_CFG1 0x1F
#define SMARTRF_SETTING_MODCFG_DEV_E 0x03 //0x1B
#define SMARTRF_SETTING_DCFILT_CFG 0x1C
#define SMARTRF_SETTING_PREAMBLE_CFG1 0x00
#define SMARTRF_SETTING_IQIC 0xC6
#define SMARTRF_SETTING_CHAN_BW 0x08
#define SMARTRF_SETTING_MDMCFG1 0x86
#define SMARTRF_SETTING_MDMCFG0 0x0A //0x4A
#define SMARTRF_SETTING_AGC_REF 0x20
#define SMARTRF_SETTING_AGC_CS_THR 0x25 //0x19
#define SMARTRF_SETTING_AGC_CFG1 0x0A
#define SMARTRF_SETTING_FIFO_CFG 0x00
#define SMARTRF_SETTING_FS_CFG 0x14
#define SMARTRF_SETTING_PKT_CFG2 0x07
#define SMARTRF_SETTING_PKT_CFG1 0x00
#define SMARTRF_SETTING_PKT_CFG0 0x20
#define SMARTRF_SETTING_PA_CFG2 0x28
#define SMARTRF_SETTING_PA_CFG1 0x56
#define SMARTRF_SETTING_PA_CFG0 0x54
#define SMARTRF_SETTING_IF_MIX_CFG 0x00
#define SMARTRF_SETTING_FREQOFF_CFG 0x23 // 0x22
#define SMARTRF_SETTING_FREQ2 0x6D
#define SMARTRF_SETTING_FREQ1 0x40
#define SMARTRF_SETTING_FREQ0 0x00
#define SMARTRF_SETTING_FS_DIG1 0x00
#define SMARTRF_SETTING_FS_DIG0 0x5F
#define SMARTRF_SETTING_FS_CAL1 0x40
#define SMARTRF_SETTING_FS_CAL0 0x0E
#define SMARTRF_SETTING_FS_DIVTWO 0x03
#define SMARTRF_SETTING_FS_DSM0 0x33
#define SMARTRF_SETTING_FS_DVC0 0x17
#define SMARTRF_SETTING_FS_PFD 0x50
#define SMARTRF_SETTING_FS_PRE 0x6E
#define SMARTRF_SETTING_FS_REG_DIV_CML 0x14
#define SMARTRF_SETTING_FS_SPARE 0xAC
#define SMARTRF_SETTING_FS_VCO0 0xB4
#define SMARTRF_SETTING_XOSC5 0x0E
#define SMARTRF_SETTING_XOSC1 0x03
#define SMARTRF_SETTING_SERIAL_STATUS 0x08
// Pins
#define GDO0_PIN 2
#define GDO2_PIN 3
#define TX_PIN 4
#define RESET_PIN 7
#define SS_PIN 10
#define SERIAL_CLK 0x08
#define SERIAL_RX 0x09
#define CARRIER_SENSE_VALID 0x10
#define CARRIER_SENSE 0x11
#define SETTING_DEVIATION_M 0xEB // 0x06
#define CTCSS_TONE 100
#define TONE_DURATION 1200
#define R_BIT 0x80
// CC1120 registers
#define IOCFG3 0x00
#define IOCFG2 0x01
#define IOCFG1 0x02
#define IOCFG0 0x03
#define SYNC3 0x04
#define SYNC2 0x05
#define SYNC1 0x06
#define SYNC0 0x07
#define SYNC_CFG1 0x08
#define SYNC_CFG0 0x09
#define DEVIATION_M 0x0A
#define MODCFG_DEV_E 0x0B
#define DCFILT_CFG 0x0C
#define PREAMBLE_CFG1 0x0D
#define PREAMBLE_CFG0 0x0E
#define FREQ_IF_CFG 0x0F
#define IQIC 0x10
#define CHAN_BW 0x11
#define MDMCFG1 0x12
#define MDMCFG0 0x13
#define SYMBOL_RATE2 0x14
#define SYMBOL_RATE1 0x15
#define SYMBOL_RATE0 0x16
#define AGC_REF 0x17
#define AGC_CS_THR 0x18
#define AGC_GAIN_ADJUST 0x19
#define AGC_CFG3 0x1A
#define AGC_CFG2 0x1B
#define AGC_CFG1 0x1C
#define AGC_CFG0 0x1D
#define FIFO_CFG 0x1E
#define DEV_ADDR 0x1F
#define SETTLING_CFG 0x20
#define FS_CFG 0x21
#define WOR_CFG1 0x22
#define WOR_CFG0 0x23
#define WOR_EVENT0_MSB 0x24
#define WOR_EVENT0_LSB 0x25
#define PKT_CFG2 0x26
#define PKT_CFG1 0x27
#define PKT_CFG0 0x28
#define RFEND_CFG1 0x29
#define RFEND_CFG2 0x2A
#define PA_CFG2 0x2B
#define PA_CFG1 0x2C
#define PA_CFG0 0x2D
#define PKT_LEN 0x2E
#define EXT_ADDR 0x2F
#define FIFO 0x3F
// Extended register space
#define IF_MIX_CFG 0x00
#define FREQOFF_CFG 0x01
#define FREQ2 0x0C
#define FREQ1 0x0D
#define FREQ0 0x0E
#define FS_DIG1 0x12
#define FS_DIG0 0x13
#define FS_CAL1 0x16
#define FS_CAL0 0x17
#define FS_DIVTWO 0x19
#define FS_DSM0 0x1B
#define FS_DVC0 0x1D
#define FS_PFD 0x1F
#define FS_PRE 0x20
#define FS_REG_DIV_CML 0x21
#define FS_SPARE 0x22
#define FS_VCO0 0x27
#define XOSC5 0x32
#define XOSC1 0x36
#define RSSI1 0x71
#define RSSI0 0x72
#define MARCSTATE 0x73
#define PARTNUMBER 0x8F
#define PARTVERSION 0x90
#define SERIAL_STATUS 0x91
#define MODEM_STATUS1 0x92
#define MODEM_STATUS0 0x93
#define MARC_STATUS1 0x94
#define MARC_STATUS0 0x95
#define NUM_RXBYTES 0xD7
#define FIFO_NUM_RXBYTES 0xD9
// CC1120 command strobes
#define SRES 0x30
#define SFSTXON 0x31
#define SXOFF 0x32
#define SCAL 0x33
#define SRX 0x34
#define STX 0x35
#define SIDLE 0x36
#define SAFC 0x37
#define SWOR 0x38
#define SPWD 0x39
#define SFRX 0x3A
#define SFTX 0x3B
#define SWORRST 0x3C
#define SNOP 0x3D
#endif // CC1120_H
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