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Showing posts with the label CFM

CC1120/Arduino - CFM for nFSK

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 28.1.2021 CC1120/Arduino - CFM for nFSK Arduino Due + CC1120 CFM CFM data output for 4-FSK. Possibly CFM could be used for demodulating N-FSK systems.   #include <SPI.h> #include "cc1120.h" #define PRINT_INFO    1 volatile uint8_t cfmData  = 0; volatile bool mChg        = false; void setup() {   Serial.begin(115200);   pinMode(RESET_PIN, OUTPUT);   pinMode(SS_PIN, OUTPUT);   pinMode(GDO0_PIN, INPUT);   pinMode(GDO3_PIN, INPUT);   digitalWrite(SS_PIN, HIGH);   digitalWrite(RESET_PIN, HIGH);     SPI.begin();   strobeSPI(SNOP);   // Preamble off   uint8_t v = readSPI(PREAMBLE_CFG0);   bitClear(v, 5);   writeSPI(PREAMBLE_CFG0, v);   // Sync off   v = readSPI(SYNC_CFG0);   v &= B11100011;   writeSPI(SYNC_CFG0, v);   // CRC off   v = readSPI(PKT_CFG1);   v &= B11110011;   writeSPI(PKT_CFG1, v);   writ...
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CC1120 CFM RX+TX

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  21.6.2021 CC1120 CFM RX+TX CC1120 + Arduino Due   #include <SPI.h> #include "cc1120.h" #define PRINT_INFO  1 #define RX_ARR_SIZE 1536 #define RX_OK       "RX done" #define TX_OK       "TX done" #define TX          "TX" #define RX          "RX" #define TX_WAIT     "Waiting for 4 seconds" volatile int8_t rx_arr[RX_ARR_SIZE]; volatile uint16_t rx_arr_index = 0; volatile uint8_t radio_state = 0; void setup() {   Serial.begin(9600);   pinMode(RESET_PIN, OUTPUT);   pinMode(SS_PIN, OUTPUT);   pinMode(GDO0_PIN, INPUT);   pinMode(GDO3_PIN, INPUT);   digitalWrite(SS_PIN, HIGH);   digitalWrite(RESET_PIN, HIGH);     SPI.begin();   strobeSPI(SNOP);   // Preamble off   uint8_t v = readSPI(PREAMBLE_CFG0);   bitClear(v, 5);   writeSPI(PREAMBLE_...
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CC1120 - tx CTCSS in CFM mode

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29.11.2020 CC1120 - tx CTCSS in CFM mode CC1120 - MikroElektronika ccRF3 click board Arduino Due CC1120 custom frequency modulation mode (CFM) From CC1120 datasheet: CFM_TX_DATA_IN value 9 with deviation value 0.736237 kHz = ~100 Hz (CTCSS channel 12)   #include <SPI.h> #include "cc1120.h" #define PRINT_INFO  1 uint8_t cfmValue = 9; void setup() {   Serial.begin(9600);   pinMode(RESET_PIN, OUTPUT);   pinMode(SS_PIN, OUTPUT);   pinMode(CFM_TX_DATA_CLK_PIN, INPUT);   digitalWrite(SS_PIN, HIGH);   digitalWrite(RESET_PIN, HIGH);     SPI.begin();   strobeSPI(SNOP);   // Preamble off   uint8_t v = readSPI(PREAMBLE_CFG0);   bitClear(v, 5);   writeSPI(PREAMBLE_CFG0, v);   // Sync off   v = readSPI(SYNC_CFG0);   v &= B11100011;   writeSPI(SYNC_CFG0, v);   // CRC off   v = readSPI(PKT_CFG1);   v &= B11110011;   writeSPI(PKT_CFG1, v);   writeSPI(IOCFG0, CFM_TX_DATA_...
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Arduino Due - CC1120 CFM rx

10.12.2020 Arduino Due - CC1120 CFM rx #include <SPI.h> #include "cc1120.h" #define PRINT_INFO    1 #undef PRINT_INFO #define F_DEV         2494 volatile uint8_t cfmData  = 0; volatile bool mChg        = false; void setup() {   Serial.begin(250000);   pinMode(RESET_PIN, OUTPUT);   pinMode(SS_PIN, OUTPUT);   pinMode(GDO0_PIN, INPUT);   pinMode(GDO3_PIN, INPUT);   digitalWrite(SS_PIN, HIGH);   digitalWrite(RESET_PIN, HIGH);     SPI.begin();   strobeSPI(SNOP);   // Preamble off   uint8_t v = readSPI(PREAMBLE_CFG0);   bitClear(v, 5);   writeSPI(PREAMBLE_CFG0, v);   // Sync off   v = readSPI(SYNC_CFG0);   v &= B11100011;   writeSPI(SYNC_CFG0, v);   // CRC off   v = readSPI(PKT_CFG1);   v &= B11110011;   writeSPI(PKT_CFG1, v);   writeSPI(IOCFG0, CARRIER_SENSE);   writ...
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CC1120 - CFM demodulate experiment

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29.9.2020 CC1120 - CFM demodulate experiment Arduino Uno & CC1120 CCRF3 Click https://www.mikroe.com/ccrf-3-click Arduino Uno digital pin 2 connected to GDO0 (CLKEN_CFM), digital pin 3 connected to GDO2 (CARRIER_SENSE) and digital pin 4 connected to piezo buzzer Test TX device: PMR446, channel 2 When PMR446 PTT pushed flat tone (CC1120 carrier sense acts like squelch, AGC_CS_THR) is heard from piezo buzzer, when talking lots of alternating noise ... CC1120 Custom frequency modulation (CFM) and transparent serial modes enabled. * CFM_RX_DATA_OUT register value is in two's complement format. Negative value conversion to positive decimal format:       if (bitRead(cfmData, 7)) {         cfmData = ~cfmData;         cfmData += 1;       } * #include <SPI.h> #include "cc1120.h" #define PRINT_INFO    1 #define EXT      ...
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