Light Show / Mbed OS alarm_master_extended_Vance

Test Commit May 2021

Dependencies:   SX127x sx12xx_hal

main.cpp@0:cb38da4f4b04, 2017-08-22 (annotated)

Committer:
dudmuck
Date:
Tue Aug 22 10:06:40 2017 -0700
Revision:
0:cb38da4f4b04
Child:
1:3199506bc2e5
initial commit

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 0:cb38da4f4b04 20 DigitalIn user_button(USER_BUTTON);
dudmuck 0:cb38da4f4b04 21 Timer t;
dudmuck 0:cb38da4f4b04 22 #define CMD_ALARM 0x01
dudmuck 0:cb38da4f4b04 23
dudmuck 0:cb38da4f4b04 24 static uint16_t crc_ccitt( uint8_t *buffer, uint16_t length )
dudmuck 0:cb38da4f4b04 25 {
dudmuck 0:cb38da4f4b04 26 // The CRC calculation follows CCITT
dudmuck 0:cb38da4f4b04 27 const uint16_t polynom = 0x1021;
dudmuck 0:cb38da4f4b04 28 // CRC initial value
dudmuck 0:cb38da4f4b04 29 uint16_t crc = 0x0000;
dudmuck 0:cb38da4f4b04 30
dudmuck 0:cb38da4f4b04 31 if( buffer == NULL )
dudmuck 0:cb38da4f4b04 32 {
dudmuck 0:cb38da4f4b04 33 return 0;
dudmuck 0:cb38da4f4b04 34 }
dudmuck 0:cb38da4f4b04 35
dudmuck 0:cb38da4f4b04 36 for( uint16_t i = 0; i < length; ++i )
dudmuck 0:cb38da4f4b04 37 {
dudmuck 0:cb38da4f4b04 38 crc ^= ( uint16_t ) buffer[i] << 8;
dudmuck 0:cb38da4f4b04 39 for( uint16_t j = 0; j < 8; ++j )
dudmuck 0:cb38da4f4b04 40 {
dudmuck 0:cb38da4f4b04 41 crc = ( crc & 0x8000 ) ? ( crc << 1 ) ^ polynom : ( crc << 1 );
dudmuck 0:cb38da4f4b04 42 }
dudmuck 0:cb38da4f4b04 43 }
dudmuck 0:cb38da4f4b04 44
dudmuck 0:cb38da4f4b04 45 return crc;
dudmuck 0:cb38da4f4b04 46 }
dudmuck 0:cb38da4f4b04 47
dudmuck 0:cb38da4f4b04 48 void transmit(unsigned target)
dudmuck 0:cb38da4f4b04 49 {
dudmuck 0:cb38da4f4b04 50 unsigned t_diff;
dudmuck 0:cb38da4f4b04 51 uint16_t crc;
dudmuck 0:cb38da4f4b04 52
dudmuck 0:cb38da4f4b04 53 radio.tx_buf[0] = CMD_ALARM;
dudmuck 0:cb38da4f4b04 54 t_diff = target - t.read_us();
dudmuck 0:cb38da4f4b04 55 radio.tx_buf[1] = t_diff >> 24;
dudmuck 0:cb38da4f4b04 56 radio.tx_buf[2] = t_diff >> 16;
dudmuck 0:cb38da4f4b04 57 radio.tx_buf[3] = t_diff >> 8;
dudmuck 0:cb38da4f4b04 58 radio.tx_buf[4] = t_diff & 0xff;
dudmuck 0:cb38da4f4b04 59 crc = crc_ccitt(radio.tx_buf, 5);
dudmuck 0:cb38da4f4b04 60 radio.tx_buf[5] = crc >> 8;
dudmuck 0:cb38da4f4b04 61 radio.tx_buf[6] = crc & 0xff;
dudmuck 0:cb38da4f4b04 62
dudmuck 0:cb38da4f4b04 63
dudmuck 0:cb38da4f4b04 64 lora.start_tx(lora.RegPayloadLength); /* begin transmission */
dudmuck 0:cb38da4f4b04 65
dudmuck 0:cb38da4f4b04 66 while (lora.service() != SERVICE_TX_DONE) /* wait for transmission to complete */
dudmuck 0:cb38da4f4b04 67 ;
dudmuck 0:cb38da4f4b04 68
dudmuck 0:cb38da4f4b04 69 printf("t_diff:%u crc:%04x\r\n", t_diff, crc);
dudmuck 0:cb38da4f4b04 70 }
dudmuck 0:cb38da4f4b04 71
dudmuck 0:cb38da4f4b04 72 #define TARGET_LATENCY 2000000
dudmuck 0:cb38da4f4b04 73 void send_alarm()
dudmuck 0:cb38da4f4b04 74 {
dudmuck 0:cb38da4f4b04 75 int i;
dudmuck 0:cb38da4f4b04 76 unsigned target = t.read_us() + TARGET_LATENCY;
dudmuck 0:cb38da4f4b04 77 printf("send_alarm() %u\n", target);
dudmuck 0:cb38da4f4b04 78
dudmuck 0:cb38da4f4b04 79 for (i = 0; i < 3; i++) {
dudmuck 0:cb38da4f4b04 80 transmit(target);
dudmuck 0:cb38da4f4b04 81 wait(0.1);
dudmuck 0:cb38da4f4b04 82 }
dudmuck 0:cb38da4f4b04 83 }
dudmuck 0:cb38da4f4b04 84
dudmuck 0:cb38da4f4b04 85 int main()
dudmuck 0:cb38da4f4b04 86 {
dudmuck 0:cb38da4f4b04 87 printf("\r\nreset-tx\r\n");
dudmuck 0:cb38da4f4b04 88 t.start();
dudmuck 0:cb38da4f4b04 89 radio.rf_switch = rfsw_callback;
dudmuck 0:cb38da4f4b04 90
dudmuck 0:cb38da4f4b04 91 radio.set_frf_MHz(910.8);
dudmuck 0:cb38da4f4b04 92 lora.enable();
dudmuck 0:cb38da4f4b04 93 lora.setBw_KHz(500);
dudmuck 0:cb38da4f4b04 94 lora.setSf(11);
dudmuck 0:cb38da4f4b04 95
dudmuck 0:cb38da4f4b04 96 /* RFO or PABOOST choice:
dudmuck 0:cb38da4f4b04 97 * SX1276 shield: RFO if using 900MHz, or PA_BOOST if using 433MHz
dudmuck 0:cb38da4f4b04 98 */
dudmuck 0:cb38da4f4b04 99 rfsw.input();
dudmuck 0:cb38da4f4b04 100 if (rfsw.read()) {
dudmuck 0:cb38da4f4b04 101 printf("LAS\r\n");
dudmuck 0:cb38da4f4b04 102 /* LAS HF=PA_BOOST LF=RFO */
dudmuck 0:cb38da4f4b04 103 if (radio.HF)
dudmuck 0:cb38da4f4b04 104 radio.RegPaConfig.bits.PaSelect = 1;
dudmuck 0:cb38da4f4b04 105 else
dudmuck 0:cb38da4f4b04 106 radio.RegPaConfig.bits.PaSelect = 0;
dudmuck 0:cb38da4f4b04 107 } else {
dudmuck 0:cb38da4f4b04 108 /* MAS shield board, only RFO TX */
dudmuck 0:cb38da4f4b04 109 radio.RegPaConfig.bits.PaSelect = 0;
dudmuck 0:cb38da4f4b04 110 printf("MAS\r\n");
dudmuck 0:cb38da4f4b04 111 }
dudmuck 0:cb38da4f4b04 112 rfsw.output();
dudmuck 0:cb38da4f4b04 113 radio.write_reg(REG_PACONFIG, radio.RegPaConfig.octet);
dudmuck 0:cb38da4f4b04 114
dudmuck 0:cb38da4f4b04 115 /* constant payload length */
dudmuck 0:cb38da4f4b04 116 lora.RegPayloadLength = 7;
dudmuck 0:cb38da4f4b04 117 radio.write_reg(REG_LR_PAYLOADLENGTH, lora.RegPayloadLength);
dudmuck 0:cb38da4f4b04 118
dudmuck 0:cb38da4f4b04 119 for (;;) {
dudmuck 0:cb38da4f4b04 120 if (!user_button.read()) {
dudmuck 0:cb38da4f4b04 121 int i;
dudmuck 0:cb38da4f4b04 122 for (i = 0; i < 5; i++) {
dudmuck 0:cb38da4f4b04 123 wait(0.01);
dudmuck 0:cb38da4f4b04 124 if (user_button.read()) {
dudmuck 0:cb38da4f4b04 125 printf("trans\r\n");
dudmuck 0:cb38da4f4b04 126 break;
dudmuck 0:cb38da4f4b04 127 }
dudmuck 0:cb38da4f4b04 128 }
dudmuck 0:cb38da4f4b04 129 if (i == 5)
dudmuck 0:cb38da4f4b04 130 send_alarm();
dudmuck 0:cb38da4f4b04 131
dudmuck 0:cb38da4f4b04 132 while (!user_button.read())
dudmuck 0:cb38da4f4b04 133 ;
dudmuck 0:cb38da4f4b04 134 }
dudmuck 0:cb38da4f4b04 135
dudmuck 0:cb38da4f4b04 136 } // ..for (;;)
dudmuck 0:cb38da4f4b04 137 }