Diff: PPM/PPMOut.h

Revision:

0:f0b20f502059

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PPM/PPMOut.h	Thu May 24 10:19:44 2018 +0000
@@ -0,0 +1,36 @@
+#ifndef CH_PPM_OUT
+#define CH_PPM_OUT
+
+class PpmOut{
+    public:
+        static const uint8_t MAX_CHANNELS = 8;
+        static const uint16_t CHANNEL_SYNC = 300; // us
+        static const uint16_t CHANNEL_PAD_SYNC = 1000 - CHANNEL_SYNC; // us
+        static const uint16_t FRAME_SYNC = 5000; // us
+        static const uint16_t FRAME_LEN = 20000; // us
+        static const uint16_t MAX_CHANNEL_VALUE = 1980; // us
+        static const uint16_t MIN_CHANNEL_VALUE = 1020; 
+        static const uint16_t DOTS = MAX_CHANNELS*2+2; // two dots per channel + FRAME_SYNC
+
+        /* Will start the PPM output */
+        PpmOut(PinName pin, uint8_t channel_number);
+        /* Values go from MIN_CHANNEL_VALUE to MAX_CHANNEL_VALUE */
+        void setChannel(int channel_no, uint16_t value);
+
+    private:
+        /* These are the time dots where the signal changes the value 
+           from 0 to 1 and in reverse */
+        uint16_t dots[DOTS];
+        Timeout timeout;
+        DigitalOut ppm;
+        uint8_t current_dot;
+        uint8_t channel_number;
+        uint16_t frame_length;
+        uint16_t pulse_out;
+
+        void attimeout();
+        inline void resetChannels();
+        inline void setFrameSync();
+};
+
+#endif // CH_PPM_OUT
\ No newline at end of file