1  | #include "SPI.h"
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2  |  | 
3  |  | 
4  | unsigned short int spiTransfer16(unsigned char nSEL, unsigned short int a)
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5  | {
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6  |   unsigned short int ret = 0;
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7  |   digitalWrite(nSEL, LOW); //chip select low
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8  |   ret = SPI.transfer16(a);
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9  |   digitalWrite(nSEL, HIGH); //chip select high
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10  |   delay(1); //wait 1 ms before transmitting the next word
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11  |   return ret;
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12  | }
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13  |  | 
14  | unsigned char spiTransfer(unsigned char nSEL, unsigned char a)
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15  | {
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16  |   unsigned char ret = 0;
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17  |   digitalWrite(nSEL, LOW); //chip select low
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18  |   ret = SPI.transfer(a);
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19  |   digitalWrite(nSEL, HIGH); //chip select high
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20  |   delayMicroseconds(20); //wait 20us before transmitting the next word
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21  |   return ret;
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22  | }
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23  |  | 
24  | class RFM01
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25  | {
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26  |   private:
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27  |     int nSel = 0;
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28  |     int nIRQ = 0;
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29  |  | 
30  |     char receivedChar = '0';
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31  |     unsigned short int output[10];
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32  |  | 
33  |   public:
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34  |     RFM01(int nSelPin, int nIRQPin)
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35  |     {
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36  |       nSel = nSelPin;
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37  |       nIRQ = nIRQPin;
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38  |     }
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39  |     
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40  |     void init( void )
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41  |     {
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42  |       pinMode(nSel, OUTPUT);
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43  |       digitalWrite(nSel, HIGH);
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44  |       pinMode(nIRQ, INPUT);
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45  |  | 
46  |  | 
47  |       SPI.begin();
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48  |  | 
49  |       SPI.beginTransaction(SPISettings(140000, MSBFIRST, SPI_MODE0));
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50  |       output[0] = spiTransfer16(nSel, 0x0000); //initial transfer -status read
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51  |       output[1] = spiTransfer16(nSel, 0x89FB); //config setting - 433MHz, crystal active, 16pF crystal CAP, 134kHz Baseband Bandwidth, module on
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52  |       output[2] = spiTransfer16(nSel, 0xA640); //434Mhz center freq
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53  |       output[3] = spiTransfer16(nSel, 0xC847); //2.4kbps
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54  |       output[4] = spiTransfer16(nSel, 0xC69B); //AFC
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55  |       output[5] = spiTransfer16(nSel, 0xC42A); //clock recovery manual ctl, digital filter, DQD = 4
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56  |       output[6] = spiTransfer16(nSel, 0xCE84); //use FIFO
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57  |       output[7] = spiTransfer16(nSel, 0xCE87); //sync
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58  |       output[8] = spiTransfer16(nSel, 0xC081); //activate rx, 0db gain, enable
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59  |       SPI.endTransaction();
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60  |     }
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61  |  | 
62  |     bool hasData( void )
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63  |     {
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64  |       if (!digitalRead(nIRQ))
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65  |       {
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66  |         return true;
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67  |       }
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68  |  | 
69  |       return false;
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70  |     }
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71  |  | 
72  |     unsigned char read8( void )
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73  |     {
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74  |       SPI.beginTransaction(SPISettings(140000, MSBFIRST, SPI_MODE0));
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75  |       output[0] = spiTransfer16(nSel, 0x0000); //read status byte
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76  |       output[1] = spiTransfer(nSel, 0x00); //read input byte
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77  |       output[2] = spiTransfer(nSel, 0x00); //read input byte
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78  |       output[3] = spiTransfer(nSel, 0x00); //read input byte
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79  |       output[4] = spiTransfer(nSel, 0x00); //read input byte
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80  |       output[5] = spiTransfer(nSel, 0x00); //read input byte
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81  |       output[6] = spiTransfer(nSel, 0x00); //read input byte
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82  |       output[7] = spiTransfer(nSel, 0x00); //read input byte
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83  |       output[8] = spiTransfer16(nSel, 0xCE84); //use FIFO
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84  |       output[9] = spiTransfer16(nSel, 0xCE87); //sync
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85  |       SPI.endTransaction();
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86  |  | 
87  |       receivedChar = (char) output[0];
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88  |  | 
89  |       return (unsigned char) output[0];
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90  |     }
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91  |  | 
92  |     void putOutOutPut( int s )
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93  |     {
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94  |       for (int i = 0; i < s; i++)
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95  |       {
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96  |         Serial.print((output[i]&0xFF00)>>8);
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97  |         Serial.print("|");
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98  |         Serial.println(output[i]&0x00FF);
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99  |       }
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100  |     }
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101  |  | 
102  |     char getReceivedChar( void )
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103  |     {
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104  |       return receivedChar;
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105  |     }
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106  | };
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107  |  | 
108  | class RFM02
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109  | {
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110  |   private:
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111  |  | 
112  |     int nSel = 0;
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113  |     int nIRQ = 0;
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114  |     int FSK = 0;
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115  |  | 
116  |     unsigned short int output[10]; 
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117  |     
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118  |   public:
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119  |  | 
120  |     RFM02(int nSelPin, int nIRQPin, int FSKPin)
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121  |     {
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122  |       nSel = nSelPin;
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123  |       nIRQ = nIRQPin;
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124  |       FSK = FSKPin;
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125  |     }
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126  |  | 
127  |     void init( void )
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128  |     {
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129  |       pinMode(nSel, OUTPUT);
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130  |       digitalWrite(nSel, HIGH);
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131  |       pinMode(nIRQ, INPUT);
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132  |       pinMode(FSK, OUTPUT);
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133  |       digitalWrite(FSK, LOW);
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134  |  | 
135  |       SPI.begin();
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136  |  | 
137  |       SPI.beginTransaction(SPISettings(140000, MSBFIRST, SPI_MODE0));
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138  |       output[0] = spiTransfer16(nSel, 0xCC00); //initial transfer - read status register
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139  |       output[1] = spiTransfer16(nSel, 0x8B81); //433MHz Freqency band, clock frequency = 2 MHz, big crystal cap, 
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140  |       output[2] = spiTransfer16(nSel, 0xA640); //434Mhz center freq
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141  |       output[3] = spiTransfer16(nSel, 0xC823); //data rate = 9578,5 bps
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142  |       output[4] = spiTransfer16(nSel, 0xD040); //RATE/2  //measured rate 2.4kbps
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143  |       output[5] = spiTransfer16(nSel, 0xC220); //tx bit sync on
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144  |       output[6] = spiTransfer16(nSel, 0xC001); //pwer management command
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145  |       
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146  |       SPI.endTransaction();
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147  |     }
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148  |  | 
149  |     void putByte(unsigned char c)
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150  |     {
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151  |       unsigned char i = 0;
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152  |       for (i = 0; i < 8; i ++)
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153  |       {
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154  |         while (!digitalRead(nIRQ));
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155  |         while (digitalRead(nIRQ));
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156  |         if (c & 0x80)
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157  |         {
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158  |           digitalWrite(FSK, HIGH);
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159  |         } else {
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160  |           digitalWrite(FSK, LOW);
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161  |         }
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162  |         c = c<<1;
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163  |       }
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164  |     }
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165  |  | 
166  |     void send8(unsigned char c)
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167  |     {
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168  |       output[0] = spiTransfer16(nSel, 0xC039); //Power mgmt, activate crystal, synthesizer, power amp  
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169  |             
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170  |       putByte(0xAA); //preamble
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171  |       putByte(0xAA); //preamble
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172  |       putByte(0xAA); //preamble
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173  |       putByte(0x2D); //sync word
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174  |       putByte(0xD4); //sync word
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175  |       putByte(c);    //data byte
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176  |       putByte(c);    //data byte
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177  |       putByte(0xAA); //schlusswort
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178  |       delayMicroseconds(1); // 1us delay
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179  |       output[2] = spiTransfer16(nSel, 0xC001); //deactivate tx
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180  |     }
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181  |  | 
182  |     void putOutOutPut( int s )
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183  |     {
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184  |       for (int i = 0; i < s; i++)
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185  |       {
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186  |         Serial.println(output[i]);
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187  |       }
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188  |     }
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189  | };
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190  |  | 
191  | #define DATASIZE 50
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192  |  | 
193  | RFM01 rfm01(44, 18);
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194  | RFM02 rfm02(45, 19, 43);
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195  |  | 
196  | char inputData[DATASIZE];
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197  | int inputDataIterator = 0;
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198  |  | 
199  | void setup() {
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200  |   delay(200); //rfm modules need at least 150ms on start up before being talked to over spi
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201  |   Serial.begin(57600);
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202  |   Serial.println("Serial is working");
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203  |  | 
204  |   Serial.println("init rfm01...");
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205  |   rfm01.init();
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206  |  | 
207  |   Serial.println("output:");
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208  |   rfm01.putOutOutPut(9);
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209  |  | 
210  |   Serial.println("init rfm02...");
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211  |   rfm02.init();
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212  |  | 
213  |   Serial.println("output:");
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214  |   rfm01.putOutOutPut(7);
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215  |  | 
216  | }
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217  |  | 
218  | void loop() {
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219  |   unsigned char input = 0;
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220  |  | 
221  |   if (rfm01.hasData())
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222  |   {
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223  |     Serial.print("rfm01 data available: ");
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224  |     input = rfm01.read8();
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225  |     delay(5);
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226  |     Serial.println(input);
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227  |     Serial.println("rfm01 output:");
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228  |     rfm01.putOutOutPut(10);
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229  |     inputData[inputDataIterator] = rfm01.getReceivedChar();
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230  |     if ((inputDataIterator++) == DATASIZE)
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231  |     {
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232  |       inputDataIterator = 0;
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233  |       Serial.println("Received Data as string:");
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234  |       for (int u = 0; u< DATASIZE; u++)
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235  |       {
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236  |         Serial.print(inputData[u]);
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237  |       }
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238  |       Serial.println("");
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239  |     }
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240  |       
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241  |   }
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242  |  | 
243  |   if (Serial.available())
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244  |   {
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245  |     Serial.println("rfm02 sending something");
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246  |     Serial.read();
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247  |     rfm02.send8(127);
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248  |     Serial.println("output:");
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249  |     rfm02.putOutOutPut(2);
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250  |   }
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251  |  | 
252  | }
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