DRA818 VHF or UHF radio module library. http://www.dorji.com/docs/data/DRA818V.pdf
Example.txt
- Committer:
- ebarranco
- Date:
- 2016-05-26
- Revision:
- 3:b822fbac58f4
File content as of revision 3:b822fbac58f4:
// Lib for http://www.dorji.com/docs/data/DRA818V.pdf #include "mbed.h" #include "dra818.h" #define PTT PB_4 // PTT pin. This is active low. #define PD PB_5 // Power Down pin. This need to start low, then be set high before programming. #define DRA_TXD PA_9 #define DRA_RXD PA_10 Serial dra_serial(DRA_TXD, DRA_RXD); DRA818 dra(&dra_serial, PTT); DigitalOut PowerDown=(PD); DigitalOut PushToTalk=(PTT); int main() { PowerDown=1; // PD is Active HIGH, so this turns the DRA818 on. // The following functions are not instantaneously set, you need to call writeFreq to program them after a PowerDown. dra.setGWB(0); // Channels space. 0 = 12.5k 1 = 25k dra.setTXFreq(146.525); // TX Frequency dra.setRXFreq(146.525); // RX Freqency dra.setTXCTCSS(0); // 9 = 91.5 Hz, See https://en.wikipedia.org/wiki/CTCSS for a list. dra.setSquelch(3); // Squelch level 3. dra.setRXCTCSS(0); // No CTCSS on RX. dra.writeFreq(); // Write out frequency settings to the DRA module. // These functions are instantaneously written to the DRA module. dra.setVolume(4); // Set output volume to '4'. dra.setFilters(true, true, true); // Sets all filters (Pre/De-Emphasis, High-Pass, Low-Pass) on. while(1) { PushToTalk = 0; // PTT is Active low, so this turns the PTT on. wait(10); PushToTalk = 1; wait(120); } }