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Rev | Author | Line No. | Line |
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1171 | hbuss | 1 | /*####################################################################################### |
2 | Decodieren eines RC Summen Signals oder Spektrum Empfänger-Satellit |
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3 | #######################################################################################*/ |
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4 | |||
1426 | ingob | 5 | #include "Spektrum.h" |
1171 | hbuss | 6 | #include "main.h" |
1506 | holgerb | 7 | //#define RECEIVER_SPEKTRUM_EXP |
8 | |||
1320 | hbuss | 9 | unsigned char SpektrumTimer = 0; |
1171 | hbuss | 10 | |
1506 | holgerb | 11 | #ifdef RECEIVER_SPEKTRUM_EXP |
12 | unsigned char sexcnt; // Counter for Spektrum-Expander |
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13 | unsigned char sexparity; // Parity Bit for Spektrum-Expander |
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14 | signed char sexdata[7]; // Data for Spektrum-Expander |
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15 | #endif |
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1213 | ingob | 16 | //--------------------------------------------------------------// |
17 | //--------------------------------------------------------------// |
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18 | void SpektrumBinding(void) |
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19 | { |
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20 | unsigned int timerTimeout = SetDelay(10000); // Timeout 10 sec. |
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21 | unsigned char connected = 0; |
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22 | unsigned int delaycounter; |
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1391 | killagreg | 23 | |
1213 | ingob | 24 | UCSR1B &= ~(1 << RXCIE1); // disable rx-interrupt |
25 | UCSR1B &= ~(1<<RXEN1); // disable Uart-Rx |
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26 | PORTD &= ~(1 << PORTD2); // disable pull-up |
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1391 | killagreg | 27 | |
1213 | ingob | 28 | printf("\n\rPlease connect Spektrum receiver for binding NOW..."); |
1391 | killagreg | 29 | |
1213 | ingob | 30 | while(!CheckDelay(timerTimeout)) |
31 | { |
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32 | if (PIND & (1 << PORTD2)) { timerTimeout = SetDelay(90); connected = 1; break; } |
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33 | } |
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1391 | killagreg | 34 | |
35 | if (connected) |
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36 | { |
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37 | |||
38 | printf("ok.\n\r"); |
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1213 | ingob | 39 | DDRD |= (1 << DDD2); // Rx as output |
40 | |||
41 | while(!CheckDelay(timerTimeout)); // delay after startup of RX |
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42 | for (delaycounter = 0; delaycounter < 100; delaycounter++) PORTD |= (1 << PORTD2); |
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43 | for (delaycounter = 0; delaycounter < 400; delaycounter++) PORTD &= ~(1 << PORTD2); |
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1391 | killagreg | 44 | |
1213 | ingob | 45 | for (delaycounter = 0; delaycounter < 10; delaycounter++) PORTD |= (1 << PORTD2); |
46 | for (delaycounter = 0; delaycounter < 10; delaycounter++) PORTD &= ~(1 << PORTD2); |
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47 | for (delaycounter = 0; delaycounter < 400; delaycounter++) PORTD |= (1 << PORTD2); |
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48 | for (delaycounter = 0; delaycounter < 400; delaycounter++) PORTD &= ~(1 << PORTD2); |
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1391 | killagreg | 49 | |
1213 | ingob | 50 | for (delaycounter = 0; delaycounter < 10; delaycounter++) PORTD |= (1 << PORTD2); |
51 | for (delaycounter = 0; delaycounter < 10; delaycounter++) PORTD &= ~(1 << PORTD2); |
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52 | for (delaycounter = 0; delaycounter < 400; delaycounter++) PORTD |= (1 << PORTD2); |
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53 | for (delaycounter = 0; delaycounter < 400; delaycounter++) PORTD &= ~(1 << PORTD2); |
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54 | |||
55 | for (delaycounter = 0; delaycounter < 10; delaycounter++) PORTD |= (1 << PORTD2); |
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56 | for (delaycounter = 0; delaycounter < 10; delaycounter++) PORTD &= ~(1 << PORTD2); |
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57 | for (delaycounter = 0; delaycounter < 400; delaycounter++) PORTD |= (1 << PORTD2); |
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1391 | killagreg | 58 | |
1213 | ingob | 59 | } |
1391 | killagreg | 60 | else |
61 | { printf("Timeout.\n\r"); |
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62 | |||
63 | |||
1213 | ingob | 64 | } |
1391 | killagreg | 65 | |
1213 | ingob | 66 | DDRD &= ~(1 << DDD2); // RX as input |
1391 | killagreg | 67 | PORTD &= ~(1 << PORTD2); |
1213 | ingob | 68 | |
1424 | ingob | 69 | SpektrumUartInit(); // init Uart again |
1213 | ingob | 70 | } |
71 | |||
1171 | hbuss | 72 | //############################################################################ |
73 | // USART1 initialisation from killagreg |
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1424 | ingob | 74 | void SpektrumUartInit(void) |
1171 | hbuss | 75 | //############################################################################ |
76 | { |
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77 | // -- Start of USART1 initialisation for Spekturm seriell-mode |
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78 | // USART1 Control and Status Register A, B, C and baud rate register |
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1431 | ingob | 79 | uint8_t sreg = SREG; |
80 | |||
1171 | hbuss | 81 | uint16_t ubrr = (uint16_t) ((uint32_t) SYSCLK/(8 * 115200) - 1); |
1431 | ingob | 82 | |
83 | // disable all interrupts before reconfiguration |
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84 | cli(); |
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1171 | hbuss | 85 | // disable RX-Interrupt |
86 | UCSR1B &= ~(1 << RXCIE1); |
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87 | // disable TX-Interrupt |
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88 | UCSR1B &= ~(1 << TXCIE1); |
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89 | // disable DRE-Interrupt |
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90 | UCSR1B &= ~(1 << UDRIE1); |
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91 | // set direction of RXD1 and TXD1 pins |
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92 | // set RXD1 (PD2) as an input pin |
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93 | PORTD |= (1 << PORTD2); |
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94 | DDRD &= ~(1 << DDD2); |
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1431 | ingob | 95 | |
96 | // set TXD1 (PD3) as an output pin |
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97 | PORTD |= (1 << PORTD3); |
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98 | DDRD |= (1 << DDD3); |
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99 | |||
1171 | hbuss | 100 | // USART0 Baud Rate Register |
101 | // set clock divider |
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102 | UBRR1H = (uint8_t)(ubrr>>8); |
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103 | UBRR1L = (uint8_t)ubrr; |
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104 | // enable double speed operation |
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105 | UCSR1A |= (1 << U2X1); |
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106 | // enable receiver and transmitter |
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107 | //UCSR1B = (1<<RXEN1)|(1<<TXEN1); |
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1391 | killagreg | 108 | |
1171 | hbuss | 109 | UCSR1B = (1<<RXEN1); |
110 | // set asynchronous mode |
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111 | UCSR1C &= ~(1 << UMSEL11); |
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112 | UCSR1C &= ~(1 << UMSEL10); |
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113 | // no parity |
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114 | UCSR1C &= ~(1 << UPM11); |
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115 | UCSR1C &= ~(1 << UPM10); |
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116 | // 1 stop bit |
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117 | UCSR1C &= ~(1 << USBS1); |
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118 | // 8-bit |
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119 | UCSR1B &= ~(1 << UCSZ12); |
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120 | UCSR1C |= (1 << UCSZ11); |
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121 | UCSR1C |= (1 << UCSZ10); |
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122 | // flush receive buffer explicit |
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1172 | hbuss | 123 | while(UCSR1A & (1<<RXC1)) UDR1; |
1171 | hbuss | 124 | // enable RX-interrupts at the end |
125 | UCSR1B |= (1 << RXCIE1); |
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126 | // -- End of USART1 initialisation |
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1431 | ingob | 127 | // restore global interrupt flags |
128 | |||
129 | SREG = sreg; |
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1171 | hbuss | 130 | return; |
131 | } |
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1391 | killagreg | 132 | |
1171 | hbuss | 133 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
134 | // + Copyright (c) Rainer Walther |
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135 | // + RC-routines from original MK rc.c (c) H&I |
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136 | // + Useful infos from Walter: http://www.rcgroups.com/forums/showthread.php?t=714299&page=2 |
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137 | // + only for non-profit use |
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138 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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139 | // |
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140 | // 20080808 rw Modified for Spektrum AR6100 (PPM) |
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141 | // 20080823 rw Add Spektrum satellite receiver on USART1 (644P only) |
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142 | // 20081213 rw Add support for Spektrum DS9 Air-Tx-Module (9 channels) |
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143 | // Replace AR6100-coding with original composit-signal routines |
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144 | // |
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145 | // --- |
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146 | // Entweder Summensignal ODER Spektrum-Receiver anschließen. Nicht beides gleichzeitig betreiben! |
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147 | // Binding is not implemented. Bind with external Receiver. |
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148 | // Servo output J3, J4, J5 not serviced |
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149 | // |
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150 | // Anschuß Spektrum Receiver |
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151 | // Orange: 3V von der FC (keinesfalls an 5V anschließen!) |
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152 | // Schwarz: GND |
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153 | // Grau: RXD1 (Pin 3) auf 10-Pol FC-Stecker |
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154 | // |
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155 | // --- |
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156 | // Satellite-Reciever connected on USART1: |
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157 | // |
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158 | // DX7/DX6i: One data-frame at 115200 baud every 22ms. |
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159 | // DX7se: One data-frame at 115200 baud every 11ms. |
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160 | // byte1: unknown |
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161 | // byte2: unknown |
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162 | // byte3: and byte4: channel data (FLT-Mode) |
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163 | // byte5: and byte6: channel data (Roll) |
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164 | // byte7: and byte8: channel data (Nick) |
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165 | // byte9: and byte10: channel data (Gier) |
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166 | // byte11: and byte12: channel data (Gear Switch) |
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167 | // byte13: and byte14: channel data (Gas) |
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168 | // byte15: and byte16: channel data (AUX2) |
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169 | // |
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170 | // DS9 (9 Channel): One data-frame at 115200 baud every 11ms, alternating frame 1/2 for CH1-7 / CH8-9 |
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171 | // 1st Frame: |
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172 | // byte1: unknown |
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173 | // byte2: unknown |
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174 | // byte3: and byte4: channel data |
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175 | // byte5: and byte6: channel data |
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176 | // byte7: and byte8: channel data |
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177 | // byte9: and byte10: channel data |
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178 | // byte11: and byte12: channel data |
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179 | // byte13: and byte14: channel data |
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1391 | killagreg | 180 | // byte15: and byte16: channel data |
1171 | hbuss | 181 | // 2nd Frame: |
182 | // byte1: unknown |
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183 | // byte2: unknown |
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184 | // byte3: and byte4: channel data |
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185 | // byte5: and byte6: channel data |
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186 | // byte7: and byte8: 0xffff |
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187 | // byte9: and byte10: 0xffff |
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188 | // byte11: and byte12: 0xffff |
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189 | // byte13: and byte14: 0xffff |
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190 | // byte15: and byte16: 0xffff |
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191 | // |
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192 | // Each channel data (16 bit= 2byte, first msb, second lsb) is arranged as: |
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193 | // |
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194 | // Bits: F 0 C3 C2 C1 C0 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 |
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195 | // |
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196 | // 0 means a '0' bit |
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197 | // F: 1 = indicates beginning of 2nd frame for CH8-9 (DS9 only) |
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198 | // C3 to C0 is the channel number. 0 to 9 (4 bit, as assigned in the transmitter) |
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199 | // D9 to D0 is the channel data (10 bit) 0xaa..0x200..0x356 for 100% transmitter-travel |
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200 | // |
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201 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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202 | |||
1322 | hbuss | 203 | #define MIN_FRAMEGAP 68 // 7ms |
204 | #define MAX_BYTEGAP 3 // 310us |
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1320 | hbuss | 205 | |
1419 | ingob | 206 | |
1171 | hbuss | 207 | //############################################################################ |
1481 | holgerb | 208 | // Wird im UART-Interrupt aufgerufen |
1171 | hbuss | 209 | //############################################################################ |
1419 | ingob | 210 | void SpektrumParser(unsigned char c) |
1171 | hbuss | 211 | { |
1320 | hbuss | 212 | static unsigned char Sync=0, FrameCnt=0, ByteHigh=0, ReSync=1, Frame2=0; |
1481 | holgerb | 213 | unsigned int Channel, index = 0; |
214 | signed int signal = 0, tmp; |
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1171 | hbuss | 215 | int bCheckDelay; |
1419 | ingob | 216 | // c = UDR1; // get data byte |
1320 | hbuss | 217 | if(ReSync == 1) |
1171 | hbuss | 218 | { |
219 | // wait for beginning of new frame |
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220 | ReSync = 0; |
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1322 | hbuss | 221 | SpektrumTimer = MIN_FRAMEGAP; |
1171 | hbuss | 222 | FrameCnt = 0; |
223 | Sync = 0; |
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224 | ByteHigh = 0; |
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225 | } |
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226 | else |
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1391 | killagreg | 227 | { |
1320 | hbuss | 228 | if(!SpektrumTimer) bCheckDelay = 1; else bCheckDelay = 0;//CheckDelay(FrameTimer); |
1171 | hbuss | 229 | if ( Sync == 0 ) |
230 | { |
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1172 | hbuss | 231 | if(bCheckDelay) |
1171 | hbuss | 232 | { |
233 | // nach einer Pause von mind. 7ms erstes Sync-Character gefunden |
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234 | // Zeichen ignorieren, da Bedeutung unbekannt |
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235 | Sync = 1; |
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236 | FrameCnt ++; |
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1320 | hbuss | 237 | SpektrumTimer = MAX_BYTEGAP; |
1171 | hbuss | 238 | } |
239 | else |
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240 | { |
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241 | // Zeichen kam vor Ablauf der 7ms Sync-Pause |
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242 | // warten auf erstes Sync-Zeichen |
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1322 | hbuss | 243 | SpektrumTimer = MIN_FRAMEGAP; |
1320 | hbuss | 244 | FrameCnt = 0; |
245 | Sync = 0; |
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246 | ByteHigh = 0; |
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1171 | hbuss | 247 | } |
248 | } |
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1172 | hbuss | 249 | else if((Sync == 1) && !bCheckDelay) |
1171 | hbuss | 250 | { |
251 | // zweites Sync-Character ignorieren, Bedeutung unbekannt |
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252 | Sync = 2; |
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253 | FrameCnt ++; |
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1320 | hbuss | 254 | SpektrumTimer = MAX_BYTEGAP; |
1171 | hbuss | 255 | } |
1172 | hbuss | 256 | else if((Sync == 2) && !bCheckDelay) |
1171 | hbuss | 257 | { |
1320 | hbuss | 258 | SpektrumTimer = MAX_BYTEGAP; |
1171 | hbuss | 259 | // Datenbyte high |
260 | ByteHigh = c; |
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261 | if (FrameCnt == 2) |
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262 | { |
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263 | // is 1st Byte of Channel-data |
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264 | // Frame 1 with Channel 1-7 comming next |
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265 | Frame2 = 0; |
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1172 | hbuss | 266 | if(ByteHigh & 0x80) |
1171 | hbuss | 267 | { |
268 | // DS9: Frame 2 with Channel 8-9 comming next |
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269 | Frame2 = 1; |
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270 | } |
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1391 | killagreg | 271 | } |
1171 | hbuss | 272 | Sync = 3; |
273 | FrameCnt ++; |
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274 | } |
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1172 | hbuss | 275 | else if((Sync == 3) && !bCheckDelay) |
1171 | hbuss | 276 | { |
277 | // Datenbyte low |
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278 | // High-Byte for next channel comes next |
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1320 | hbuss | 279 | SpektrumTimer = MAX_BYTEGAP; |
1171 | hbuss | 280 | Sync = 2; |
281 | FrameCnt ++; |
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1320 | hbuss | 282 | Channel = ((unsigned int)ByteHigh << 8) | c; |
1481 | holgerb | 283 | if(EE_Parameter.Receiver == RECEIVER_SPEKTRUM) |
284 | { |
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285 | signal = Channel & 0x3ff; |
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286 | signal -= 0x200; // Offset, range 0x000..0x3ff? |
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287 | signal = signal/3; // scaling to fit PPM resolution |
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288 | index = (ByteHigh >> 2) & 0x0f; |
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289 | } |
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290 | else |
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291 | if(EE_Parameter.Receiver == RECEIVER_SPEKTRUM_HI_RES) |
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292 | { |
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293 | signal = Channel & 0x7ff; |
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294 | signal -= 0x400; // Offset, range 0x000..0x7ff? |
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295 | signal = signal/6; // scaling to fit PPM resolution |
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296 | index = (ByteHigh >> 3) & 0x0f; |
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297 | } |
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298 | else |
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299 | //if(EE_Parameter.Receiver == RECEIVER_SPEKTRUM_LOW_RES) |
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300 | { |
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301 | signal = Channel & 0x3ff; |
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302 | signal -= 360; // Offset, range 0x000..0x3ff? |
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303 | signal = signal/2; // scaling to fit PPM resolution |
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304 | index = (ByteHigh >> 2) & 0x0f; |
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305 | } |
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1391 | killagreg | 306 | |
1481 | holgerb | 307 | index++; |
308 | if(index < 13) |
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1506 | holgerb | 309 | { |
310 | // Stabiles Signal |
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311 | #ifdef RECEIVER_SPEKTRUM_EXP |
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312 | if (index == 2) index = 4; // Analog channel reassigment (2 <-> 4) for logical numbering (1,2,3,4) |
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313 | else if (index == 4) index = 2; |
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314 | #endif |
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315 | if(abs(signal - PPM_in[index]) < 6) |
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316 | { |
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317 | if(SenderOkay < 200) SenderOkay += 10; |
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318 | else |
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319 | { |
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1232 | hbuss | 320 | SenderOkay = 200; |
321 | TIMSK1 &= ~_BV(ICIE1); // disable PPM-Input |
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322 | } |
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323 | } |
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1391 | killagreg | 324 | tmp = (3 * (PPM_in[index]) + signal) / 4; |
1172 | hbuss | 325 | if(tmp > signal+1) tmp--; else |
1391 | killagreg | 326 | if(tmp < signal-1) tmp++; |
1506 | holgerb | 327 | |
328 | #ifdef RECEIVER_SPEKTRUM_EXP |
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329 | if(index == 6) // FLIGHT-MODE - The channel used for our data uplink |
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330 | { |
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331 | if (signal > 100) // SYNC received |
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332 | { |
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333 | sexcnt = 0; // Reset bitcounter |
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334 | sexparity = 0; // Reset parity bit |
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335 | } |
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336 | |||
337 | if (signal < 10) |
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338 | { |
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339 | sexcnt++; // Increase counter only for non-sync bits |
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340 | sexdata[sexcnt] = -113; // Bit = 0 -> value = -113 (min) |
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341 | } |
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342 | |||
343 | if (sexcnt == 7) sexcnt = 0; // Overflow protection |
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344 | |||
345 | if (signal < -100) |
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346 | { |
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347 | sexdata[sexcnt] = 114; // Bit = 1 -> value = 114 (max) |
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348 | if (sexcnt < 6) sexparity = ~sexparity; // Bit = 1 -> Invert parity bit (without itself) |
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349 | } |
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350 | |||
351 | if (sexcnt == 6) // Wait for complete frame |
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352 | { |
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353 | if ((sexparity != 0 && sexdata[6] == -113) || (sexparity == 0 && sexdata[6] == 114)) // Parity check |
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354 | { |
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355 | if (sexdata[1] == 114 && sexdata[2] == -113) PPM_in[5] = -113;// Reconstruct tripole Flight-Mode value (CH5) |
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356 | if (sexdata[1] == -113 && sexdata[2] == -113) PPM_in[5] = 0; // Reconstruct tripole Flight-Mode value (CH5) |
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357 | if (sexdata[1] == -113 && sexdata[2] == 114) PPM_in[5] = 114; // Reconstruct tripole Flight-Mode value (CH5) |
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358 | PPM_in[6] = sexdata[3]; // Elevator (CH6) |
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359 | PPM_in[9] = sexdata[4]; // Aileron (CH9) |
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360 | PPM_in[10] = sexdata[5]; // Rudder (CH10) |
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361 | } |
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362 | } |
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363 | } |
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364 | #endif |
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365 | if(SenderOkay >= 180) PPM_diff[index] = ((tmp - PPM_in[index]) / 3) * 3; |
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366 | |||
1172 | hbuss | 367 | else PPM_diff[index] = 0; |
1506 | holgerb | 368 | |
369 | #ifdef RECEIVER_SPEKTRUM_EXP |
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370 | if (index < 5 ) PPM_in[index] = tmp; // Update normal potis (CH1-4) |
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371 | if (index == 5) PPM_in[7] = signal; // Gear (CH7) |
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372 | if (index == 7) PPM_in[8] = signal; // AUX2 (CH8) |
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373 | #else |
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374 | PPM_in[index] = tmp; |
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375 | #endif |
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1171 | hbuss | 376 | } |
1506 | holgerb | 377 | else if(index > 17) ReSync = 1; // hier stimmt was nicht: neu synchronisieren |
1171 | hbuss | 378 | } |
379 | else |
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380 | { |
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381 | // hier stimmt was nicht: neu synchronisieren |
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382 | ReSync = 1; |
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383 | FrameCnt = 0; |
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384 | Frame2 = 0; |
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1320 | hbuss | 385 | // new frame next, nach fruehestens 7ms erwartet |
1322 | hbuss | 386 | SpektrumTimer = MIN_FRAMEGAP; |
1171 | hbuss | 387 | } |
1391 | killagreg | 388 | |
1320 | hbuss | 389 | // 16 Bytes eingetroffen -> Komplett |
1172 | hbuss | 390 | if(FrameCnt >= 16) |
1171 | hbuss | 391 | { |
392 | // Frame complete |
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1172 | hbuss | 393 | if(Frame2 == 0) |
1171 | hbuss | 394 | { |
395 | // Null bedeutet: Neue Daten |
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396 | // nur beim ersten Frame (CH 0-7) setzen |
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1391 | killagreg | 397 | if(!ReSync) NewPpmData = 0; |
1171 | hbuss | 398 | } |
399 | FrameCnt = 0; |
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400 | Frame2 = 0; |
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401 | Sync = 0; |
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1322 | hbuss | 402 | SpektrumTimer = MIN_FRAMEGAP; |
1171 | hbuss | 403 | } |
404 | } |
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1391 | killagreg | 405 | } |
1171 | hbuss | 406 | |
407 |