Djordje Trajkovic
Send&recive two byte over ccRF 2550
Diff: main.cpp
- Revision:
- 0:a669868d99dd
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Jun 30 21:47:55 2015 +0000
@@ -0,0 +1,538 @@
+#include "mbed.h"
+#include "regssrf04.h"
+#include "__Lib_RF_CC2550.h"
+
+#define _TX_MODE 0
+#define _RX_MODE 1
+#define _IDLE_MODE 2
+
+/*******************************************************************************
+* Connections for the ccRF module
+*******************************************************************************/
+Serial pc(SERIAL_TX, SERIAL_RX);
+//RF_STAT
+DigitalIn RF_STAT(PA_10);//GDO2
+DigitalIn gdo0(PB_5); // pin connected to gdo0 pin for checking that received a new packet
+//RF_CS
+DigitalOut RF_CS(PB_3);//CS pin mikroelektronika
+//Spi
+SPI spi3(PB_15,PB_14,PB_13);
+
+unsigned char txBuffer[64];
+unsigned char rxBuffer[61]; // Length byte + 2 status bytes are not stored in this buffer
+unsigned char paTable = 0xFE;
+
+/*******************************************************************************
+* Default setting for the ccRF module
+*******************************************************************************/
+RF_SETTINGS rfSettings = {
+ 0x0A, // FSCTRL1 Frequency synthesizer control.
+ 0x00, // FSCTRL0 Frequency synthesizer control.
+ 0x5D, // FREQ2 Frequency control word, high byte.
+ 0x93, // FREQ1 Frequency control word, middle byte.
+ 0xB1, // FREQ0 Frequency control word, low byte.
+ 0x2D, // MDMCFG4 Modem configuration.
+ 0x3B, // MDMCFG3 Modem configuration.
+ 0x73, // MDMCFG2 Modem configuration.
+ 0x22, // MDMCFG1 Modem configuration.
+ 0xF8, // MDMCFG0 Modem configuration.
+ 0x00, // CHANNR Channel number.
+ 0x01, // DEVIATN Modem deviation setting (when FSK modulation is enabled).
+ 0xB6, // FREND1 Front end RX configuration.
+ 0x10, // FREND0 Front end TX configuration.
+ 0x18, // MCSM0 Main Radio Control State Machine configuration.
+ 0x1D, // FOCCFG Frequency Offset Compensation Configuration.
+ 0x1C, // BSCFG Bit synchronization Configuration.
+ 0xC7, // AGCCTRL2 AGC control.
+ 0x00, // AGCCTRL1 AGC control.
+ 0xB0, // AGCCTRL0 AGC control.
+ 0xEA, // FSCAL3 Frequency synthesizer calibration.
+ 0x0A, // FSCAL2 Frequency synthesizer calibration.
+ 0x00, // FSCAL1 Frequency synthesizer calibration.
+ 0x11, // FSCAL0 Frequency synthesizer calibration.
+ 0x59, // FSTEST Frequency synthesizer calibration.
+ 0x88, // TEST2 Various test settings.
+ 0x31, // TEST1 Various test settings.
+ 0x0B, // TEST0 Various test settings.
+ 0x07, // FIFOTHR RXFIFO and TXFIFO thresholds.
+ 0x29, // IOCFG2 GDO2 output pin configuration.
+ 0x06, // IOCFG0D GDO0 output pin configuration.
+ 0x06, // PKTCTRL1 Packet automation control. //04
+ 0x05, // PKTCTRL0 Packet automation control.
+ 0x30, // ADDR Device address.
+ 0xFF // PKTLEN Packet length.
+ };
+
+// globals
+unsigned char oldstate;
+unsigned int primljeni_pod;
+unsigned char len;
+unsigned char modeSelected;
+
+////////////////////////////////////////////////////////////////////////////////////
+#include "regssrf04.h"
+#include "__Lib_RF_CC2550.h"
+
+//-------------------------------------------------------------------------------------------------------
+// Definitions to support burst/single access:
+#define WRITE_BURST 0x40
+#define READ_SINGLE 0x80
+#define READ_BURST 0xC0
+//-------------------------------------------------------------------------------------------------------
+
+//-------------------------------------------------------------------------------------------------------
+// Defines
+#define CRC_OK 0x80
+#define RSSI 0
+#define LQI 1
+#define BYTES_IN_RXFIFO 0x7F
+//-------------------------------------------------------------------------------------------------------
+
+
+//////////////////////////////////
+unsigned char spi3read(int address) {
+ int data;
+ RF_CS=0; //select the device
+ spi3.write(address); //select the register
+ data = spi3.write(0x00); //send a dummy byte to retrive data
+ RF_CS=1; //deselect the device
+ return data; //return the data
+
+}
+//////////////////////////////////
+
+
+unsigned char RfReceivePacket(unsigned char *rxBuffer, unsigned char *length);
+//-------------------------------------------------------------------------------------------------------
+// void RFInit()
+//
+// DESCRIPTION:
+// Basic initialisation of RF pins.
+//
+//-------------------------------------------------------------------------------------------------------
+void RFInit()
+{
+ RfWriteRfSettings(&rfSettings);
+ RfSpiWriteReg(CCxxx0_PATABLE, paTable);
+}
+
+//-------------------------------------------------------------------------------------------------------
+// void Reset_CCxxx0()
+//
+// DESCRIPTION:
+// Function for reseting CCxxx0 chip via strobe command (CCxxx_SRES - strobe command).
+//
+//-------------------------------------------------------------------------------------------------------
+void Reset_CCxxx0()
+{
+ RF_CS = 0;
+ while(RF_STAT);
+ spi3.write(CCxxx0_SRES);
+ RF_CS = 1;
+}
+
+
+//-------------------------------------------------------------------------------------------------------
+// void Power_On_Reset_CCxxx0()
+//
+// DESCRIPTION:
+// Function for manual reseting CCxxx0 chip.
+//
+//-------------------------------------------------------------------------------------------------------
+void POWER_ON_RESET_CCxxx0()
+{
+ RF_CS = 1;
+ wait(1e-6);
+ RF_CS = 0;
+ wait(1e-6);
+ RF_CS = 1;
+ wait(41e-6);
+ Reset_CCxxx0();
+}
+
+//-------------------------------------------------------------------------------------------------------
+// void RfSpiWriteReg(unsigned char addr, unsigned char value)
+//
+// DESCRIPTION:
+// Function for writing to a single CCxxx0 register
+//
+// ARGUMENTS:
+// unsigned char address
+// Address of a specific CCxxx0 register to accessed.
+// unsigned char value
+// Value to be written to the specified CCxxx0 register.
+//-------------------------------------------------------------------------------------------------------
+void RfSpiWriteReg(unsigned char address, unsigned char value)
+{
+ RF_CS = 0;
+ while(RF_STAT);
+ spi3.write(address);
+
+ spi3.write(value);
+ RF_CS = 1;
+}
+
+//-------------------------------------------------------------------------------------------------------
+// void RfSpiWriteBurstReg(unsigned char address, unsigned char *buffer, unsigned char count)
+//
+// DESCRIPTION:
+// This function writes to multiple CCxxx0 register, using SPI burst access.
+//
+// ARGUMENTS:
+// unsigned char addr
+// Address of the first CCxxx0 register to be accessed.
+// unsigned char *buffer
+// Array of bytes to be written into a corresponding range of
+// CCxx00 registers, starting by the address specified in _addr_.
+// unsigned char count
+// Number of bytes to be written to the subsequent CCxxx0 registers.
+//-------------------------------------------------------------------------------------------------------
+void RfSpiWriteBurstReg(unsigned char address, unsigned char *buffer, unsigned char count) {
+ unsigned char i;
+ RF_CS = 0;
+ while (RF_STAT);
+
+ spi3.write(address | WRITE_BURST);
+
+ spi3.write(count);
+ for (i = 0; i < count; i++) {
+ spi3.write(buffer[i]);
+ }
+ RF_CS = 1;
+}// RfSpiWriteBurstReg
+
+//-------------------------------------------------------------------------------------------------------
+// void RfSpiStrobe(unsigned char strobe)
+//
+// DESCRIPTION:
+// Function for writing a strobe command to the CCxxx0
+//
+// ARGUMENTS:
+// unsigned char strobe
+// Strobe command
+//-------------------------------------------------------------------------------------------------------
+void RfSpiStrobe(unsigned char strobe) {
+ RF_CS = 0;
+ while (RF_STAT);
+ spi3.write(strobe);
+
+ RF_CS = 1;
+}// RfSpiStrobe
+
+//-------------------------------------------------------------------------------------------------------
+// unsigned char RfSpiReadStatus(usnigned char address)
+//
+// DESCRIPTION:
+// This function reads a CCxxx0 status register.
+//
+// ARGUMENTS:
+// unsigned char address
+// Address of the CCxxx0 status register to be accessed.
+//
+// RETURN VALUE:
+// usnigned char
+// Value of the accessed CCxxx0 status register.
+//-------------------------------------------------------------------------------------------------------
+unsigned char RfSpiReadStatus(unsigned char address) {
+ unsigned char x;
+ RF_CS = 0;
+ while (RF_STAT);
+ x = spi3read(address | READ_BURST);
+ RF_CS = 1;
+ return x;
+}// halSpiReadStatus
+
+//-------------------------------------------------------------------------------------------------------
+// unsigned char RfSpiReadReg(unsigned char address)
+//
+// DESCRIPTION:
+// This function gets the value of a single specified CCxxx0 register.
+//
+// ARGUMENTS:
+// unsigned char addr
+// Address of the CCxxx0 register to be accessed.
+//
+// RETURN VALUE:
+// unsigned char
+// Value of the accessed CCxxx0 register.
+//-------------------------------------------------------------------------------------------------------
+unsigned char RfSpiReadReg(unsigned char address) {
+ unsigned char x;
+ RF_CS = 0;
+ while (RF_STAT);
+ x = spi3read(address | READ_SINGLE);
+ RF_CS = 1;
+ return x;
+}// RfSpiReadReg
+
+//-------------------------------------------------------------------------------------------------------
+// void RfSpiReadBurstReg(unsigned char address, unsigned char *buffer, unsigned char count)
+//
+// DESCRIPTION:
+// This function reads multiple CCxxx0 register, using SPI burst access.
+//
+// ARGUMENTS:
+// unsigned char address
+// Address of the first CCxxx0 register to be accessed.
+// unsigned char *buffer
+// Pointer to a byte array which stores the values read from a
+// corresponding range of CCxxx0 registers.
+// unsigned char count
+// Number of bytes to be written to the subsequent CCxxx0 registers.
+//-------------------------------------------------------------------------------------------------------
+void RfSpiReadBurstReg(unsigned char address, unsigned char *buffer, unsigned char count) {
+ unsigned char i;
+ RF_CS = 0;
+ while (RF_STAT);
+ for (i = 0; i < count; i++) {
+ buffer[i] = spi3read(address | READ_BURST);
+ }
+ RF_CS = 1;
+}// RfSpiReadBurstReg
+
+//-------------------------------------------------------------------------------------------------------
+// void RfWriteRfSettings(RF_SETTINGS *pRfSettings)
+//
+// DESCRIPTION:
+// This function is used to configure the CCxxx0 based on a given rf setting
+//
+// ARGUMENTS:
+// RF_SETTINGS *pRfSettings
+// Pointer to a struct containing rf register settings
+//-------------------------------------------------------------------------------------------------------
+void RfWriteRfSettings(RF_SETTINGS *pRfSettings) {
+ // Write register settings
+ RfSpiWriteReg(CCxxx0_FSCTRL1, pRfSettings->FSCTRL1);
+ RfSpiWriteReg(CCxxx0_FSCTRL0, pRfSettings->FSCTRL0);
+ RfSpiWriteReg(CCxxx0_FREQ2, pRfSettings->FREQ2);
+ RfSpiWriteReg(CCxxx0_FREQ1, pRfSettings->FREQ1);
+ RfSpiWriteReg(CCxxx0_FREQ0, pRfSettings->FREQ0);
+ RfSpiWriteReg(CCxxx0_MDMCFG4, pRfSettings->MDMCFG4);
+ RfSpiWriteReg(CCxxx0_MDMCFG3, pRfSettings->MDMCFG3);
+ RfSpiWriteReg(CCxxx0_MDMCFG2, pRfSettings->MDMCFG2);
+ RfSpiWriteReg(CCxxx0_MDMCFG1, pRfSettings->MDMCFG1);
+ RfSpiWriteReg(CCxxx0_MDMCFG0, pRfSettings->MDMCFG0);
+ RfSpiWriteReg(CCxxx0_CHANNR, pRfSettings->CHANNR);
+ RfSpiWriteReg(CCxxx0_DEVIATN, pRfSettings->DEVIATN);
+ RfSpiWriteReg(CCxxx0_FREND1, pRfSettings->FREND1);
+ RfSpiWriteReg(CCxxx0_FREND0, pRfSettings->FREND0);
+ RfSpiWriteReg(CCxxx0_MCSM0 , pRfSettings->MCSM0 );
+ RfSpiWriteReg(CCxxx0_FOCCFG, pRfSettings->FOCCFG);
+ RfSpiWriteReg(CCxxx0_BSCFG, pRfSettings->BSCFG);
+ RfSpiWriteReg(CCxxx0_AGCCTRL2, pRfSettings->AGCCTRL2);
+ RfSpiWriteReg(CCxxx0_AGCCTRL1, pRfSettings->AGCCTRL1);
+ RfSpiWriteReg(CCxxx0_AGCCTRL0, pRfSettings->AGCCTRL0);
+ RfSpiWriteReg(CCxxx0_FSCAL3, pRfSettings->FSCAL3);
+ RfSpiWriteReg(CCxxx0_FSCAL2, pRfSettings->FSCAL2);
+ RfSpiWriteReg(CCxxx0_FSCAL1, pRfSettings->FSCAL1);
+ RfSpiWriteReg(CCxxx0_FSCAL0, pRfSettings->FSCAL0);
+ RfSpiWriteReg(CCxxx0_FSTEST, pRfSettings->FSTEST);
+ RfSpiWriteReg(CCxxx0_TEST2, pRfSettings->TEST2);
+ RfSpiWriteReg(CCxxx0_TEST1, pRfSettings->TEST1);
+ RfSpiWriteReg(CCxxx0_TEST0, pRfSettings->TEST0);
+ RfSpiWriteReg(CCxxx0_FIFOTHR, pRfSettings->FIFOTHR);
+ RfSpiWriteReg(CCxxx0_IOCFG2, pRfSettings->IOCFG2);
+ RfSpiWriteReg(CCxxx0_IOCFG0, pRfSettings->IOCFG0);
+ RfSpiWriteReg(CCxxx0_PKTCTRL1, pRfSettings->PKTCTRL1);
+ RfSpiWriteReg(CCxxx0_PKTCTRL0, pRfSettings->PKTCTRL0);
+ RfSpiWriteReg(CCxxx0_ADDR, pRfSettings->ADDR);
+ RfSpiWriteReg(CCxxx0_PKTLEN, pRfSettings->PKTLEN);
+}// RfWriteRfSettings
+
+
+//-------------------------------------------------------------------------------------------------------
+// void RfWriteRfSettings2500()
+//
+// DESCRIPTION:
+// This function is used for testing
+//
+//
+//-------------------------------------------------------------------------------------------------------
+void RfWriteRfSettings2500() {
+ RfSpiWriteReg(CCxxx0_IOCFG0,0x06); //GDO0Output Pin Configuration
+ RfSpiWriteReg(CCxxx0_PKTCTRL0,0x05);//Packet Automation Control
+ RfSpiWriteReg(CCxxx0_FSCTRL1,0x08); //Frequency Synthesizer Control
+ RfSpiWriteReg(CCxxx0_FREQ2,0x5D); //Frequency Control Word, High Byte
+ RfSpiWriteReg(CCxxx0_FREQ1,0x93); //Frequency Control Word, Middle Byte
+ RfSpiWriteReg(CCxxx0_FREQ0,0xB1); //Frequency Control Word, Low Byte
+ RfSpiWriteReg(CCxxx0_MDMCFG4,0x86); //Modem Configuration
+ RfSpiWriteReg(CCxxx0_MDMCFG3,0x83); //Modem Configuration
+ RfSpiWriteReg(CCxxx0_MDMCFG2,0x03); //Modem Configuration
+ RfSpiWriteReg(CCxxx0_DEVIATN,0x44); //Modem Deviation Setting
+ RfSpiWriteReg(CCxxx0_MCSM0,0x18); //Main Radio Control State Machine Configuration
+ RfSpiWriteReg(CCxxx0_FOCCFG,0x16); //Frequency Offset Compensation Configuration
+ RfSpiWriteReg(CCxxx0_FSCAL1,0x00); //Frequency Synthesizer Calibration
+ RfSpiWriteReg(CCxxx0_FSCAL0,0x11); //Frequency Synthesizer Calibration
+}//RfWriteRfSettings2500
+
+
+//-------------------------------------------------------------------------------------------------------
+// void RfSendPacket(unsigned char *txBuffer, unsigned char size)
+//
+// DESCRIPTION:
+// This function can be used to transmit a packet with packet length up to 63 bytes.
+// To use this function, GD00 must be configured to be asserted when sync word is sent and
+// de-asserted at the end of the packet => halSpiWriteReg(CCxxx0_IOCFG0, 0x06);
+// The function implements polling of GDO0. First it waits for GD00 to be set and then it waits
+// for it to be cleared.
+//
+// ARGUMENTS:
+// unsigned char *txBuffer
+// Pointer to a buffer containing the data that are going to be transmitted
+//
+// unsigned char size
+// The size of the txBuffer
+//-------------------------------------------------------------------------------------------------------
+void RfSendPacket(unsigned char *txBuffer, unsigned char size) {
+
+ RfSpiWriteBurstReg(CCxxx0_TXFIFO, txBuffer, size);
+
+ RfSpiStrobe(CCxxx0_STX);
+
+ // Wait for GDO0 to be set -> sync transmitted
+ while(!RF_STAT);
+
+ // Wait for GDO0 to be cleared -> end of packet
+ while(RF_STAT);
+
+}// RfSendPacket
+
+unsigned char RfTransmitPacketWithAddress(unsigned char *txBuffer, unsigned char size, unsigned char *attempts) {
+ unsigned char rxBuffer[61];
+ unsigned char length;
+ //send data to receiver - address specified
+ RfSendPacket(txBuffer, size);
+
+ length = sizeof(rxBuffer);
+ //switch to receive mode
+ switch(RfReceivePacket(rxBuffer, &length))
+ {
+ case CCxxx0_RECEIVE_CRC_ERROR:
+ {
+ *attempts++;
+ RfTransmitPacketWithAddress(txBuffer, size, attempts);
+ break;
+ }
+
+ case CCxxx0_RECEIVE_CRC_OK:
+ {
+ return *attempts;
+ break;
+ }
+ }
+}
+// RfSendPacketStatus
+
+//-------------------------------------------------------------------------------------------------------
+// uunsiged char RfReceivePacket(unsigned char *rxBuffer, unsigned char *length)
+//
+// DESCRIPTION:
+// This function can be used to receive a packet of variable packet length (first byte in the packet
+// must be the length byte). The packet length should not exceed the RX FIFO size.
+// To use this function, GD00 must be configured to be asserted when sync word is sent and
+// de-asserted at the end of the packet => halSpiWriteReg(CCxxx0_IOCFG0, 0x06);
+// Also, APPEND_STATUS in the PKTCTRL1 register must be enabled.
+// The function implements polling of GDO0. First it waits for GD00 to be set and then it waits
+// for it to be cleared.
+// After the GDO0 pin has been de-asserted, the RXBYTES register is read to make sure that there
+// are bytes in the FIFO. This is because the GDO signal will indicate sync received even if the
+// FIFO is flushed due to address filtering, CRC filtering, or packet length filtering.
+//
+// ARGUMENTS:
+// unsigned char *rxBuffer
+// Pointer to the buffer where the incoming data should be stored
+// unsigned char *length
+// Pointer to a variable containing the size of the buffer where the incoming data should be
+// stored. After this function returns, that variable holds the packet length.
+//
+// RETURN VALUE:
+// unsigned char
+// TRUE: CRC OK
+// FALSE: CRC NOT OK (or no packet was put in the RX FIFO due to filtering)
+//-------------------------------------------------------------------------------------------------------
+unsigned char RfReceivePacket(unsigned char *rxBuffer, unsigned char *length) {
+ unsigned char status[2];
+ unsigned char packetLength;
+
+ RfSpiStrobe(CCxxx0_SRX);
+
+ // Wait for GDO0 to be set -> sync received
+ if(!RF_STAT);
+
+ // Wait for GDO0 to be cleared -> end of packet
+ while(RF_STAT);
+
+ // This status register is safe to read since it will not be updated after
+ // the packet has been received (See the CC1100 and 2500 Errata Note)
+ if ((RfSpiReadStatus(CCxxx0_RXBYTES) & BYTES_IN_RXFIFO)) {
+
+ // Read length byte
+ packetLength = RfSpiReadReg(CCxxx0_RXFIFO);
+
+ // Read data from RX FIFO and store in rxBuffer
+ if (packetLength <= *length) {
+ RfSpiReadBurstReg(CCxxx0_RXFIFO, rxBuffer, packetLength);
+ *length = packetLength;
+
+ // Read the 2 appended status bytes (status[0] = RSSI, status[1] = LQI)
+ RfSpiReadBurstReg(CCxxx0_RXFIFO, status, 2);
+
+ // MSB of LQI is the CRC_OK bit
+ return (status[LQI] & CRC_OK);
+ } else {
+ *length = packetLength;
+
+ // Make sure that the radio is in IDLE state before flushing the FIFO
+ // (Unless RXOFF_MODE has been changed, the radio should be in IDLE state at this point)
+ RfSpiStrobe(CCxxx0_SIDLE);
+
+ // Flush RX FIFO
+ RfSpiStrobe(CCxxx0_SFRX);
+ return 0;
+ }
+ } else
+ return 0;
+}// RfReceivePacket
+////////////////////////////////////////////////////////////////////////////////////
+/*******************************************************************************
+* Main function
+*******************************************************************************/
+int main() {
+ //Init SPI - treba da se provere par
+ spi3.format(8,0);//format(8,0);
+ spi3.frequency(1000000); //frekvencija(1000000);
+ wait(0.1);
+ // Reset ccRF chip
+ POWER_ON_RESET_CCxxx0();
+ // Init RF module
+ RFInit();
+
+ modeSelected = _IDLE_MODE;
+ //Set_Text_Info(modeSelected);
+
+ while(1){
+ // switch to transmit mode
+ modeSelected = _TX_MODE;//mora da se komentarise ako prima
+ // switch to receive mode
+ modeSelected = _RX_MODE;//komentarise se ako salje
+ // switch to transmit mode
+ modeSelected = _TX_MODE;
+ switch(modeSelected){
+ case _TX_MODE :{
+ txBuffer[0] = 0xAD; // send broacast address, primer
+ txBuffer[1] = 0xFD;
+ RfSendPacket(txBuffer, 2); // send 2 bytes
+ }; break;
+ case _RX_MODE :{ // receive measured ADC value
+ len = sizeof(rxBuffer);
+ if(RfReceivePacket(rxBuffer, &len)){ // first byte is address
+ primljeni_pod = (((unsigned int)rxBuffer[1]) << 8) + rxBuffer[2];
+ pc.printf("%i",primljeni_pod);
+ }
+ }; break;
+ }
+ }
+}
+/*******************************************************************************
+* End
+*******************************************************************************/
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