Diff: PulsePosition.h

Revision:

0:3b67d4bc53ca

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PulsePosition.h	Thu Apr 21 16:31:18 2016 +0000
@@ -0,0 +1,92 @@
+/* PulsePosition Library for Teensy 3.1
+ * High resolution input and output of PPM encoded signals
+ * http://www.pjrc.com/teensy/td_libs_PulsePosition.html
+ * Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
+ *
+ * Development of this library was funded by PJRC.COM, LLC by sales of Teensy
+ * boards.  Please support PJRC's efforts to develop open source software by
+ * purchasing Teensy or other PJRC products.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice, development funding notice, and this permission
+ * notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "mbed.h"
+
+#define PULSEPOSITION_MAXCHANNELS 16
+#define FALLING 2
+#define RISING 3
+
+struct ftm_channel_struct {
+    uint32_t csc;
+    uint32_t cv;
+};
+
+class PulsePositionOutput
+{
+public:
+    PulsePositionOutput(void);
+    PulsePositionOutput(int polarity);
+    bool begin(PinName txPin); // txPin can be 5,6,9,10,20,21,22,23
+    bool begin(PinName txPin, PinName framePin);
+    bool write(uint8_t channel, float microseconds);
+    friend void ftm0_isr(void);
+private:
+    void isr(void);
+    uint32_t pulse_width[PULSEPOSITION_MAXCHANNELS+1];
+    uint32_t pulse_buffer[PULSEPOSITION_MAXCHANNELS+1];
+    uint32_t pulse_remaining;
+    DigitalOut *framePinReg;
+    volatile uint8_t framePinMask;
+    struct ftm_channel_struct *ftm;
+    uint8_t state;
+    uint8_t current_channel;
+    uint8_t total_channels;
+    uint8_t total_channels_buffer;
+    uint8_t cscSet;
+    uint8_t cscClear;
+    static PulsePositionOutput *list[8];
+    static uint8_t channelmask;
+};
+
+
+class PulsePositionInput
+{
+public:
+    PulsePositionInput(void);
+    PulsePositionInput(int polarity);
+    bool begin(PinName rxPin); // rxPin can be 5,6,9,10,20,21,22,23
+    int available(void);
+    float read(uint8_t channel);
+    friend void ftm0_isr(void);
+private:
+    void isr(void);
+    struct ftm_channel_struct *ftm;
+    uint32_t pulse_width[PULSEPOSITION_MAXCHANNELS];
+    uint32_t pulse_buffer[PULSEPOSITION_MAXCHANNELS];
+    uint32_t prev;
+    uint8_t write_index;
+    uint8_t total_channels;
+    uint8_t cscEdge;
+    bool available_flag;
+    static bool overflow_inc;
+    static uint16_t overflow_count;
+    static PulsePositionInput *list[8];
+    static uint8_t channelmask;
+};
+
+