DRA818 VHF or UHF radio module library. http://www.dorji.com/docs/data/DRA818V.pdf
Diff: Example.txt
- Revision:
- 3:b822fbac58f4
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Example.txt Thu May 26 18:50:36 2016 +0000 @@ -0,0 +1,38 @@ +// 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); + } +} \ No newline at end of file