1 /* 2 * Author: Jon Trulson <jtrulson (at) ics.com> 3 * Copyright (c) 2015 Intel Corporation. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining 6 * a copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sublicense, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be 14 * included in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 #pragma once 25 26 #include <string> 27 #include <iostream> 28 29 #include <stdint.h> 30 #include <stdlib.h> 31 #include <unistd.h> 32 #include <string.h> 33 #include <fcntl.h> 34 #include <errno.h> 35 #include <termios.h> 36 #include <sys/time.h> 37 #include <sys/select.h> 38 #include <sys/types.h> 39 #include <sys/stat.h> 40 41 #include <mraa/uart.h> 42 43 #define HMTRP_DEFAULT_UART 0 44 45 namespace upm { 46 /** 47 * @brief HMTRP Serial RF Pro library 48 * @defgroup hmtrp libupm-hmtrp 49 * @ingroup seeed uart wifi 50 */ 51 52 /** 53 * @library hmtrp 54 * @sensor hmtrp 55 * @comname Grove Serial RF Pro 56 * @altname HMTRP-433 HMTRP-470 HMTRP-868 HMTRP-915 57 * @type wifi 58 * @man seeed 59 * @con uart 60 * 61 * @brief API for the HM-TRP Serial RF Pro transceiver 62 * 63 * UPM support for the HM-TRP Serial RF Pro transceiver. This was tested 64 * specifically with the Grove Serial RF Pro transceiver. In theory, 65 * this class should work with the following devices: 66 * 67 * HM-TRP-433: 414000000-454000000Hz 68 * HM-TRP-470: 450000000-490000000Hz 69 * HM-TRP-868: 849000000-889000000Hz 70 * HM-TRP-915: 895000000-935000000Hz 71 * 72 * The only difference is the transmit and receive frequencies 73 * supported. 74 * 75 * By default, the device simply sends and receives any data 76 * presented on its UART interface. It can be put into a 77 * configuration mode by grounding the CONFIG pin on the transceiver. 78 * 79 * @image html hmtrp.jpg 80 * @snippet hmtrp.cxx Interesting 81 */ 82 class HMTRP { 83 public: 84 85 // HMTRP opcodes 86 typedef enum { RESET = 0xf0, 87 GET_CONFIG = 0xe1, 88 SET_FREQUENCY = 0xd2, 89 SET_RF_DATARATE = 0xc3, // 1200-115200 (baud) 90 SET_RX_BW = 0xb4, // 30-620 (Khz) 91 SET_FREQ_MODULATION = 0xa5, // 10-160 (KHz) 92 SET_TX_POWER = 0x96, // 0-7 93 SET_UART_SPEED = 0x1e, // recommended not to change 94 GET_RF_SIGNAL_STR = 0xa7, 95 GET_MOD_SIGNAL_STR = 0x78 96 } HMTRP_OPCODE_T; 97 98 /** 99 * HMTRP Serial RF Pro transceiver constructor 100 * 101 * @param uart Default UART to use (0 or 1) 102 */ 103 HMTRP(int uart=HMTRP_DEFAULT_UART); 104 105 /** 106 * HMTRP destructor 107 */ 108 ~HMTRP(); 109 110 /** 111 * Checks to see if there is data available for reading 112 * 113 * @param millis Number of milliseconds to wait; 0 means no waiting (default). 114 * @return True if there is data available for reading 115 */ 116 bool dataAvailable(unsigned int millis=0); 117 118 /** 119 * Reads any available data in a user-supplied buffer 120 * 121 * @param buffer Buffer to hold the data read 122 * @param len Length of the buffer 123 * @param millis Maximum time in milliseconds to wait for input. -1 means 124 * waiting forever (default). 125 * @return Number of bytes read; 0 if timed out and millis is >= 0 126 */ 127 int readData(char *buffer, int len, int millis=-1); 128 129 /** 130 * Writes the data in the buffer to the device 131 * 132 * @param buffer Buffer to hold the data read 133 * @param len Length of the buffer 134 * @return Number of bytes written 135 */ 136 int writeData(char *buffer, int len); 137 138 /** 139 * Sets up proper tty I/O modes and the baud rate. The default 140 * baud rate is 9,600 (B9600). 141 * 142 * @param baud Desired baud rate. 143 * @return True if successful 144 */ 145 bool setupTty(speed_t baud=B9600); 146 147 /** 148 * Looks for and verifies an OK response. This looks like "OK\r\n" 149 * 150 * @return True if OK received 151 */ 152 bool checkOK(); 153 154 /** 155 * Resets the device to default parameters, except for the UART baud rate 156 * 157 * @return True if successful 158 */ 159 bool reset(); 160 161 /** 162 * Queries the radio to determine its configuration 163 * 164 * @param freq Operating frequency 165 * @param dataRate TX/RX bit rate 166 * @param rxBandwidth Receiving bandwidth in Khz 167 * @param modulation Modulation frequency in Khz 168 * @param txPower Transmission power (1-7) 169 * @param uartBaud UART baud rate 170 * @return True if successful 171 */ 172 bool getConfig(uint32_t *freq, uint32_t *dataRate, uint16_t *rxBandwidth, 173 uint8_t *modulation, uint8_t *txPower, uint32_t *uartBaud); 174 175 /** 176 * Sets the frequency. Note: this is limited depending on which 177 * HM-TRP device you are using. Consult the datasheet. 178 * 179 * @param freq Operating frequency 180 * @return True if successful 181 */ 182 bool setFrequency(uint32_t freq); 183 184 /** 185 * Sets the RF data transmission rate. Valid values are between 186 * 1,200 and 115,200. 187 * 188 * @param rate Radio transmission rate in baud (1,200-115,200) 189 * @return True if successful 190 */ 191 bool setRFDataRate(uint32_t rate); 192 193 /** 194 * Sets the RX bandwidth. Valid values are between 30 and 620 (in Khz) 195 * 196 * @param rxBand RX bandwidth in Khz (30-620) 197 * @return True if successful 198 */ 199 bool setRXBandwidth(uint16_t rxBand); 200 201 /** 202 * Sets the frequency modulation. Valid values are between 10 and 160 (in Khz) 203 * 204 * @param modulation Frequency modulation to use, in Khz (10-160) 205 * @return True if successful 206 */ 207 bool setFrequencyModulation(uint8_t modulation); 208 209 /** 210 * Sets the transmit power level. Valid values are between 0 and 7, 211 * 7 being the maximum power. 212 * 213 * @param power Power level to use during transmission. Valid values 214 * are between 0 and 7. 215 * @return True if successful 216 */ 217 bool setTransmitPower(uint8_t power); 218 219 /** 220 * Sets the configured baud rate of the UART. It is strongly 221 * recommended you do not change this, or you may lose the 222 * ability to communicate with the transceiver. Valid values are 1,200-115,200. 223 * 224 * @param speed Desired baud rate to configure the device to use 225 * Valid values are between 1,200 and 115,200. 226 * @return True if successful 227 */ 228 bool setUARTSpeed(uint32_t speed); 229 230 /** 231 * Gets the RF signal strength 232 * 233 * @param strength Returned strength 234 * @return True if successful 235 */ 236 bool getRFSignalStrength(uint8_t *strength); 237 238 /** 239 * Gets the modulation signal strength. 240 * 241 * @param strength Returned strength 242 * @return True if successful 243 */ 244 bool getModSignalStrength(uint8_t *strength); 245 246 247 private: 248 mraa_uart_context m_uart; 249 int m_ttyFd; 250 }; 251 } 252 253 254
