1 | /* Correct functions are enabled for HW SPI*/
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2 | #if MYRFM12_CONF_SPI == MYRFM12_CONF_SPI_HW
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3 | /* HW SPI specific init function */
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4 | void myrfm12_port_init_hw_spi(void);
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5 | #define myrfm12_spi_init myrfm12_port_init_hw_spi
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6 |
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7 | /* HW SPI specific transfer function */
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8 | uint16_t myrfm12_trans(uint16_t wert)
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9 | {
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10 | #if(MYRFM12_CONF_DEBUG == MYRFM12_CONF_DEBUG_YES)
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11 | myrfm12_debug(cmd);
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12 | #endif
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13 |
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14 | CONVERTW val;
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15 | val.w=wert;
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16 | cbi(MYRFM12_CONF_PORT, MYRFM12_CONF_CS);
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17 | SPDR = val.b[1];
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18 | while(!(SPSR & (1<<SPIF)));
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19 | val.b[1]=SPDR;
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20 | SPDR = val.b[0];
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21 | while(!(SPSR & (1<<SPIF)));
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22 | val.b[0]=SPDR;
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23 | sbi(MYRFM12_CONF_PORT, MYRFM12_CONF_CS);
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24 | return val.w;
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25 |
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26 | /* Implementation without union usage, needs more ROM */
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27 | /*
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28 | uint16_t feedback = 0x00;
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29 | cbi(MYRFM12_PORT, MYRFM12_CS);
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30 | SPDR = (uint8_t)(wert&0x00FF);
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31 | while(!(SPSR & (1<<SPIF)));
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32 | feedback |= SPDR;
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33 | SPDR = (uint8_t)((wert&0xFF00)>>8);
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34 | while(!(SPSR & (1<<SPIF)));
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35 | feedback |= (SPDR << 8);
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36 | sbi(MYRFM12_PORT, MYRFM12_CS);
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37 | return feedback;
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38 | */
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39 | }
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40 | #endif
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41 |
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42 | /* Correct functions are enabled for SW SPI*/
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43 | #if MYRFM12_CONF_SPI == MYRFM12_CONF_SPI_SW
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44 | /* SW SPI specific init function */
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45 | void myrfm12_port_init_sw_spi(void);
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46 | #define myrfm12_spi_init myrfm12_port_init_sw_spi
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47 |
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48 | /* SW SPI specific transfer function */
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49 | uint16_t myrfm12_trans(uint16_t cmd)
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50 | {
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51 | #if(MYRFM12_CONF_DEBUG == MYRFM12_CONF_DEBUG_YES)
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52 | myrfm12_debug(cmd);
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53 | #endif
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54 |
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55 | unsigned char i;
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56 |
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57 | cbi(MYRFM12_CONF_PORT, MYRFM12_CONF_CS); // Select RFM12
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58 | for (i=0; i<16; i++) // Iterate 16 times (for 16 bits)
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59 | {
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60 | if (cmd&0x8000)
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61 | sbi(MYRFM12_CONF_PORT, MYRFM12_CONF_SDI);
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62 | else
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63 | cbi(MYRFM12_CONF_PORT, MYRFM12_CONF_SDI);
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64 | cmd<<=1;
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65 |
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66 | if (MYRFM12_CONF_PIN&(1<<MYRFM12_CONF_SDO))
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67 | cmd|=1;
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68 |
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69 | sbi(MYRFM12_CONF_PORT, MYRFM12_CONF_SCK);
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70 | //_delay_us(0.2);
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71 | asm("nop");
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72 | asm("nop");
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73 | cbi(MYRFM12_CONF_PORT, MYRFM12_CONF_SCK);
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74 | }
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75 | sbi(MYRFM12_CONF_PORT, MYRFM12_CONF_CS); // Deselect RFM12
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76 | //cbi(MYRFM12_CONF_PORT, MYRFM12_CONF_SDI); // SDI to low
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77 |
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78 | return cmd; // Return received value
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79 | }
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80 | #endif
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81 |
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82 | void myrfm12_cmd_datarate(uint16_t baud)
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83 | {
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84 | if (baud<5400)
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85 | myrfm12_trans(0xC680|MYRFM12_CALC_R_WITH_PRESCALER(baud));
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86 | else
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87 | myrfm12_trans(0xC600|MYRFM12_CALC_R_WITHOUT_PRESCALER(baud));
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88 | }
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89 |
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90 | #if (MYRFM12_CONF_SETUPMETHOD == MYRFM12_CONF_SETUPMETHOD_STD)
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91 | void myrfm12_setup()
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92 | {
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93 | /* Setup connection to RFM12 */
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94 | myrfm12_spi_init();
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95 |
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96 | /* wait until POR is done */
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97 | uint8_t i;
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98 | for (i=0; i<20; i++)
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99 | _delay_ms(10);
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100 |
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101 | /* Setup basic configration, base frequency, capacitor */
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102 | myrfm12_cmd_config(MYRFM12_CONF_SETUP_BASEFREQ|MYRFM12_CONF_SETUP_CAPACITOR|MYRFM12_CMD__CONFIG__RXFIFO_ON|MYRFM12_CMD__CONFIG__TXFIFO_ON);
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103 |
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104 | /* Setup power management, enable oscillator pin */
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105 | myrfm12_cmd_powermanagement(MYRFM12_CMD__POWER__ENABLEOSCILLATOR);
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106 |
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107 | /* Setup frequency */
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108 | myrfm12_cmd_frequencysetting(MYRFM12_CONF_SETUP_ADDFREQ);
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109 |
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110 | /* Setup baud rate */
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111 | myrfm12_cmd_datarate(MYRFM12_CONF_SETUP_BAUDRATE);
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112 |
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113 | /* Setup receiver part */
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114 | myrfm12_cmd_rxcontrol(MYRFM12_CMD__RXCTRL__PIN20_VDIOUT | MYRFM12_CMD__RXCTRL__VDIRESPTIME_FAST | MYRFM12_CMD__RXCTRL__BASEBANDWITH_200KHZ | MYRFM12_CMD__RXCTRL__LNAGAIN_MIN6DB | MYRFM12_CMD__RXCTRL__DRSSI_M79DB);
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115 |
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116 | /* Setup data filer */
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117 | myrfm12_cmd_datafilter(MYRFM12_CMD__DF__CLKRECAUTOLOCK_ENABLE | MYRFM12_CMD__DF__DQDTHRESH(3) | MYRFM12_CMD__DF__FILTERTYPE_DIGITAL);
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118 |
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119 | /* Setup the fifo */
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120 | myrfm12_cmd_fifo(MYRFM12_CMD__FIFO__FIFOIRLEVEL(8)| MYRFM12_CMD__FIFO__HSRESETMODE_ENABLE | MYRFM12_CMD__FIFO__FIFO_FILL);
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121 |
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122 | /* Setup the AFC */
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123 | myrfm12_cmd_afc(MYRFM12_CMD__AFC__AUTOMODE_MCU|MYRFM12_CMD__AFC__AUTOMODE_OFFSETKEEP | MYRFM12_CMD__AFC__RANGE_NARROW|MYRFM12_CMD__AFC__ENABLEHIGHACCURACY|MYRFM12_CMD__AFC__ENABLEOUTREG|MYRFM12_CMD__AFC__ENABLEAFC);
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124 |
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125 | /* Setup TX power,frequency deviation,modulation polarity */
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126 | myrfm12_cmd_modulation_power(MYRFM12_CONF_SETUP_POWER,MYRFM12_CONF_SETUP_FREQDEV,MYRFM12_CONF_SETUP_MODULATIONPOLARITY);
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127 |
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128 | /* Setup Wakeup */
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129 | myrfm12_cmd_wakeuptimer(MYRFM12_CMD__WAKEUP__BASE(0)|MYRFM12_CMD__WAKEUP__EXPONENT(0));
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130 |
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131 | /* Setup low duty cycle */
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132 | myrfm12_cmd_lowdutycycle(MYRFM12_CMD__LOWDUTY__DUTY(0));
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133 |
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134 | /* Setup Low Battery Detector and clock divider */
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135 | myrfm12_cmd_lowbatandclockdivider(MYRFM12_CMD__LOWBATCLOCK__CLOCK_10MHZ|MYRFM12_CMD__LOWBATCLOCK__LOWBATVOLT(0));
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136 | }
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137 | #endif
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138 |
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139 | void myrfm12_ready()
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140 | {
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141 | cbi(MYRFM12_CONF_PORT, MYRFM12_CONF_SDI);
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142 | cbi(MYRFM12_CONF_PORT, MYRFM12_CONF_CS);
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143 | asm("nop");
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144 | while (!(MYRFM12_CONF_PIN&(1<<MYRFM12_CONF_SDO)));
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145 | }
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146 |
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147 | void myrfm12_sendsyncrobytes()
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148 | {
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149 | uint8_t i;
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150 | for(i=0;i<3;i++)
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151 | {
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152 | myrfm12_ready();
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153 | myrfm12_trans(0xB8AA);
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154 | }
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155 | }
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156 |
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157 | void myrfm12_sendsyncbytes()
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158 | {
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159 | myrfm12_ready();
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160 | myrfm12_trans(0xB82D);
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161 | myrfm12_ready();
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162 | myrfm12_trans(0xB8D4);
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163 | }
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164 |
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165 | void myrfm12_txdata(uint8_t* data, uint8_t number)
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166 | {
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167 | MYRFM12_CONF_SETUP_TX_START
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168 |
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169 | /* Enable transmitter */
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170 | myrfm12_cmd_powermanagement(MYRFM12_CMD__POWER__ENABLEOSCILLATOR | MYRFM12_CMD__POWER__ENABLETRANSMITTER | MYRFM12_CMD__POWER__ENABLESYNTHESIZER);
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171 |
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172 | /* Send Syncro Bytes */
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173 | myrfm12_sendsyncrobytes();
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174 |
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175 | /* Send Sync Bytes */
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176 | myrfm12_sendsyncbytes();
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177 |
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178 | /* Send Length Byte */
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179 | myrfm12_ready();
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180 | myrfm12_cmd_txbyte(number);
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181 |
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182 | /* Send Data */
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183 | uint8_t i;
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184 | for (i=0; i<number; i++)
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185 | {
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186 | myrfm12_ready();
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187 | myrfm12_cmd_txbyte(*data++);
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188 | }
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189 |
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190 | /* Send Syncro Bytes */
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191 | myrfm12_sendsyncrobytes();
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192 |
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193 | _delay_us(10);
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194 |
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195 | /* Disable transmitter */
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196 | myrfm12_cmd_powermanagement(MYRFM12_CMD__POWER__ENABLEOSCILLATOR);
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197 |
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198 | MYRFM12_CONF_SETUP_TX_STOP
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199 | }
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