Light Show / Mbed OS alarm_master_extended_Vance_SX1280

May 2021 Commit

Dependencies:   sx128x sx12xx_hal

main.cpp@1:3199506bc2e5, 2017-08-31 (annotated)

Committer:
dudmuck
Date:
Thu Aug 31 23:15:04 2017 +0000
Revision:
1:3199506bc2e5
Parent:
0:cb38da4f4b04
Child:
2:0b7620bda2c9
use 4 input pins

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dudmuck 0:cb38da4f4b04 1 #include "sx127x_lora.h"
dudmuck 0:cb38da4f4b04 2
dudmuck 0:cb38da4f4b04 3 SPI spi(D11, D12, D13); // mosi, miso, sclk
dudmuck 0:cb38da4f4b04 4 // dio0, dio1, nss, spi, rst
dudmuck 0:cb38da4f4b04 5 SX127x radio( D2, D3, D10, spi, A0); // sx1276 arduino shield
dudmuck 0:cb38da4f4b04 6
dudmuck 0:cb38da4f4b04 7 SX127x_lora lora(radio);
dudmuck 0:cb38da4f4b04 8 DigitalInOut rfsw(A4); // for SX1276 arduino shield
dudmuck 0:cb38da4f4b04 9
dudmuck 0:cb38da4f4b04 10 void rfsw_callback()
dudmuck 0:cb38da4f4b04 11 {
dudmuck 0:cb38da4f4b04 12 if (radio.RegOpMode.bits.Mode == RF_OPMODE_TRANSMITTER) {
dudmuck 0:cb38da4f4b04 13 rfsw = 1;
dudmuck 0:cb38da4f4b04 14 } else {
dudmuck 0:cb38da4f4b04 15 rfsw = 0;
dudmuck 0:cb38da4f4b04 16 }
dudmuck 0:cb38da4f4b04 17 }
dudmuck 0:cb38da4f4b04 18 /**********************************************************************/
dudmuck 0:cb38da4f4b04 19
dudmuck 1:3199506bc2e5 20 DigitalIn pc3(PC_3);
dudmuck 1:3199506bc2e5 21 DigitalIn pc2(PC_2);
dudmuck 1:3199506bc2e5 22 DigitalIn pc6(PC_6);
dudmuck 1:3199506bc2e5 23 DigitalIn pc8(PC_8);
dudmuck 0:cb38da4f4b04 24 Timer t;
dudmuck 1:3199506bc2e5 25 #define CMD_PC2 0x02
dudmuck 1:3199506bc2e5 26 #define CMD_PC3 0x03
dudmuck 1:3199506bc2e5 27 #define CMD_PC6 0x06
dudmuck 1:3199506bc2e5 28 #define CMD_PC8 0x08
dudmuck 0:cb38da4f4b04 29
dudmuck 0:cb38da4f4b04 30 static uint16_t crc_ccitt( uint8_t *buffer, uint16_t length )
dudmuck 0:cb38da4f4b04 31 {
dudmuck 0:cb38da4f4b04 32 // The CRC calculation follows CCITT
dudmuck 0:cb38da4f4b04 33 const uint16_t polynom = 0x1021;
dudmuck 0:cb38da4f4b04 34 // CRC initial value
dudmuck 0:cb38da4f4b04 35 uint16_t crc = 0x0000;
dudmuck 0:cb38da4f4b04 36
dudmuck 0:cb38da4f4b04 37 if( buffer == NULL )
dudmuck 0:cb38da4f4b04 38 {
dudmuck 0:cb38da4f4b04 39 return 0;
dudmuck 0:cb38da4f4b04 40 }
dudmuck 0:cb38da4f4b04 41
dudmuck 0:cb38da4f4b04 42 for( uint16_t i = 0; i < length; ++i )
dudmuck 0:cb38da4f4b04 43 {
dudmuck 0:cb38da4f4b04 44 crc ^= ( uint16_t ) buffer[i] << 8;
dudmuck 0:cb38da4f4b04 45 for( uint16_t j = 0; j < 8; ++j )
dudmuck 0:cb38da4f4b04 46 {
dudmuck 0:cb38da4f4b04 47 crc = ( crc & 0x8000 ) ? ( crc << 1 ) ^ polynom : ( crc << 1 );
dudmuck 0:cb38da4f4b04 48 }
dudmuck 0:cb38da4f4b04 49 }
dudmuck 0:cb38da4f4b04 50
dudmuck 0:cb38da4f4b04 51 return crc;
dudmuck 0:cb38da4f4b04 52 }
dudmuck 0:cb38da4f4b04 53
dudmuck 1:3199506bc2e5 54 void transmit(unsigned target, uint8_t cmd)
dudmuck 0:cb38da4f4b04 55 {
dudmuck 0:cb38da4f4b04 56 unsigned t_diff;
dudmuck 0:cb38da4f4b04 57 uint16_t crc;
dudmuck 0:cb38da4f4b04 58
dudmuck 1:3199506bc2e5 59 radio.tx_buf[0] = cmd;
dudmuck 0:cb38da4f4b04 60 t_diff = target - t.read_us();
dudmuck 0:cb38da4f4b04 61 radio.tx_buf[1] = t_diff >> 24;
dudmuck 0:cb38da4f4b04 62 radio.tx_buf[2] = t_diff >> 16;
dudmuck 0:cb38da4f4b04 63 radio.tx_buf[3] = t_diff >> 8;
dudmuck 0:cb38da4f4b04 64 radio.tx_buf[4] = t_diff & 0xff;
dudmuck 0:cb38da4f4b04 65 crc = crc_ccitt(radio.tx_buf, 5);
dudmuck 0:cb38da4f4b04 66 radio.tx_buf[5] = crc >> 8;
dudmuck 0:cb38da4f4b04 67 radio.tx_buf[6] = crc & 0xff;
dudmuck 0:cb38da4f4b04 68
dudmuck 0:cb38da4f4b04 69
dudmuck 0:cb38da4f4b04 70 lora.start_tx(lora.RegPayloadLength); /* begin transmission */
dudmuck 0:cb38da4f4b04 71
dudmuck 1:3199506bc2e5 72 while (lora.service() != SERVICE_TX_DONE) { /* wait for transmission to complete */
dudmuck 1:3199506bc2e5 73 }
dudmuck 0:cb38da4f4b04 74
dudmuck 0:cb38da4f4b04 75 printf("t_diff:%u crc:%04x\r\n", t_diff, crc);
dudmuck 0:cb38da4f4b04 76 }
dudmuck 0:cb38da4f4b04 77
dudmuck 0:cb38da4f4b04 78 #define TARGET_LATENCY 2000000
dudmuck 1:3199506bc2e5 79 void send_alarm(uint8_t cmd)
dudmuck 0:cb38da4f4b04 80 {
dudmuck 0:cb38da4f4b04 81 int i;
dudmuck 0:cb38da4f4b04 82 unsigned target = t.read_us() + TARGET_LATENCY;
dudmuck 0:cb38da4f4b04 83 printf("send_alarm() %u\n", target);
dudmuck 0:cb38da4f4b04 84
dudmuck 1:3199506bc2e5 85 for (i = 0; i < 5; i++) {
dudmuck 1:3199506bc2e5 86 transmit(target, cmd);
dudmuck 0:cb38da4f4b04 87 wait(0.1);
dudmuck 0:cb38da4f4b04 88 }
dudmuck 0:cb38da4f4b04 89 }
dudmuck 1:3199506bc2e5 90
dudmuck 1:3199506bc2e5 91 void debounce(DigitalIn* pin, uint8_t cmd)
dudmuck 1:3199506bc2e5 92 {
dudmuck 1:3199506bc2e5 93 if (!pin->read()) {
dudmuck 1:3199506bc2e5 94 int i;
dudmuck 1:3199506bc2e5 95 for (i = 0; i < 5; i++) {
dudmuck 1:3199506bc2e5 96 wait(0.01);
dudmuck 1:3199506bc2e5 97 if (pin->read()) {
dudmuck 1:3199506bc2e5 98 printf("trans\r\n");
dudmuck 1:3199506bc2e5 99 break;
dudmuck 1:3199506bc2e5 100 }
dudmuck 1:3199506bc2e5 101 }
dudmuck 1:3199506bc2e5 102 if (i == 5)
dudmuck 1:3199506bc2e5 103 send_alarm(cmd);
dudmuck 1:3199506bc2e5 104
dudmuck 1:3199506bc2e5 105 while (!pin->read())
dudmuck 1:3199506bc2e5 106 ;
dudmuck 1:3199506bc2e5 107 }
dudmuck 1:3199506bc2e5 108 }
dudmuck 0:cb38da4f4b04 109
dudmuck 0:cb38da4f4b04 110 int main()
dudmuck 0:cb38da4f4b04 111 {
dudmuck 0:cb38da4f4b04 112 printf("\r\nreset-tx\r\n");
dudmuck 0:cb38da4f4b04 113 t.start();
dudmuck 1:3199506bc2e5 114
dudmuck 1:3199506bc2e5 115 pc3.mode(PullUp);
dudmuck 1:3199506bc2e5 116 pc2.mode(PullUp);
dudmuck 1:3199506bc2e5 117 pc6.mode(PullUp);
dudmuck 1:3199506bc2e5 118 pc8.mode(PullUp);
dudmuck 1:3199506bc2e5 119
dudmuck 0:cb38da4f4b04 120 radio.rf_switch = rfsw_callback;
dudmuck 0:cb38da4f4b04 121
dudmuck 0:cb38da4f4b04 122 radio.set_frf_MHz(910.8);
dudmuck 0:cb38da4f4b04 123 lora.enable();
dudmuck 0:cb38da4f4b04 124 lora.setBw_KHz(500);
dudmuck 0:cb38da4f4b04 125 lora.setSf(11);
dudmuck 0:cb38da4f4b04 126
dudmuck 0:cb38da4f4b04 127 /* RFO or PABOOST choice:
dudmuck 0:cb38da4f4b04 128 * SX1276 shield: RFO if using 900MHz, or PA_BOOST if using 433MHz
dudmuck 0:cb38da4f4b04 129 */
dudmuck 0:cb38da4f4b04 130 rfsw.input();
dudmuck 0:cb38da4f4b04 131 if (rfsw.read()) {
dudmuck 0:cb38da4f4b04 132 printf("LAS\r\n");
dudmuck 0:cb38da4f4b04 133 /* LAS HF=PA_BOOST LF=RFO */
dudmuck 0:cb38da4f4b04 134 if (radio.HF)
dudmuck 0:cb38da4f4b04 135 radio.RegPaConfig.bits.PaSelect = 1;
dudmuck 0:cb38da4f4b04 136 else
dudmuck 0:cb38da4f4b04 137 radio.RegPaConfig.bits.PaSelect = 0;
dudmuck 0:cb38da4f4b04 138 } else {
dudmuck 0:cb38da4f4b04 139 /* MAS shield board, only RFO TX */
dudmuck 0:cb38da4f4b04 140 radio.RegPaConfig.bits.PaSelect = 0;
dudmuck 0:cb38da4f4b04 141 printf("MAS\r\n");
dudmuck 0:cb38da4f4b04 142 }
dudmuck 0:cb38da4f4b04 143 rfsw.output();
dudmuck 0:cb38da4f4b04 144 radio.write_reg(REG_PACONFIG, radio.RegPaConfig.octet);
dudmuck 0:cb38da4f4b04 145
dudmuck 0:cb38da4f4b04 146 /* constant payload length */
dudmuck 0:cb38da4f4b04 147 lora.RegPayloadLength = 7;
dudmuck 0:cb38da4f4b04 148 radio.write_reg(REG_LR_PAYLOADLENGTH, lora.RegPayloadLength);
dudmuck 0:cb38da4f4b04 149
dudmuck 0:cb38da4f4b04 150 for (;;) {
dudmuck 1:3199506bc2e5 151 debounce(&pc3, CMD_PC3);
dudmuck 1:3199506bc2e5 152 debounce(&pc2, CMD_PC2);
dudmuck 1:3199506bc2e5 153 debounce(&pc6, CMD_PC6);
dudmuck 1:3199506bc2e5 154 debounce(&pc8, CMD_PC8);
dudmuck 0:cb38da4f4b04 155 } // ..for (;;)
dudmuck 0:cb38da4f4b04 156 }