Diff: Example.txt

Revision:

3:b822fbac58f4

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+++ 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);
+    }
+}
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