Diff: m3pi.h

Revision:

0:a6a3ac2e729d

Child:

2:68c904e3f9d0

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m3pi.h	Thu Jun 02 19:14:14 2011 +0000
@@ -0,0 +1,243 @@
+/* mbed m3pi Library
+ * Copyright (c) 2007-2010 cstyles
+ *
+ * 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 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.
+ */
+
+#ifndef M3PI_H
+#define M3PI_H
+
+#include "mbed.h"
+#include "platform.h"
+
+#ifdef MBED_RPC
+#include "rpc.h"
+#endif
+
+#define SEND_SIGNATURE 0x81
+#define SEND_RAW_SENSOR_VALUES 0x86
+#define SEND_TRIMPOT 0xB0
+#define SEND_BATTERY_MILLIVOLTS 0xB1
+#define DO_PLAY 0xB3
+#define PI_CALIBRATE 0xB4
+#define DO_CLEAR 0xB7
+#define DO_PRINT 0xB8
+#define DO_LCD_GOTO_XY 0xB9
+#define LINE_SENSORS_RESET_CALIBRATION 0xB5
+#define SEND_LINE_POSITION 0xB6
+#define AUTO_CALIBRATE 0xBA
+#define SET_PID 0xBB
+#define STOP_PID 0xBC
+#define M1_FORWARD 0xC1
+#define M1_BACKWARD 0xC2
+#define M2_FORWARD 0xC5
+#define M2_BACKWARD 0xC6
+
+
+
+/** m3pi control class
+ *
+ * Example:
+ * @code
+ * // Drive the m3pi forward, turn left, back, turn right, at half speed for half a second
+
+   #include "mbed.h"
+   #include "m3pi.h"
+
+   m3pi pi;
+
+   int main() {
+
+     wait(0.5);
+
+     pi.forward(0.5);
+     wait (0.5);
+     pi.left(0.5);
+     wait (0.5);
+     pi.backward(0.5);
+     wait (0.5);
+     pi.right(0.5);
+     wait (0.5);
+
+     pi.stop();
+
+ }
+ * @endcode
+ */
+class m3pi :  public Stream {
+
+    // Public functions
+public:
+
+    /** Create the m3pi object connected to the default pins
+     *
+     * @param nrst GPIO pin used for reset. Default is p23
+     * @param tx Serial transmit pin. Default is p9
+     * @param rx Serial receive pin. Default is p10
+     */
+    m3pi();
+
+
+    /** Create the m3pi object connected to the default pins
+     *
+     */
+    m3pi(PinName nrst, PinName tx, PinName rx);
+
+
+
+    /** Force a hardware reset of the 3pi
+     */
+    void reset (void);
+
+    /** Directly control the speed and direction of the left motor
+     *
+     * @param speed A normalised number -1.0 - 1.0 represents the full range.
+     */
+    void left_motor (float speed);
+
+    /** Directly control the speed and direction of the right motor
+     *
+     * @param speed A normalised number -1.0 - 1.0 represents the full range.
+     */
+    void right_motor (float speed);
+
+    /** Drive both motors forward as the same speed
+     *
+     * @param speed A normalised number 0 - 1.0 represents the full range.
+     */
+    void forward (float speed);
+
+    /** Drive both motors backward as the same speed
+     *
+     * @param speed A normalised number 0 - 1.0 represents the full range.
+     */
+    void backward (float speed);
+
+    /** Drive left motor backwards and right motor forwards at the same speed to turn on the spot
+     *
+     * @param speed A normalised number 0 - 1.0 represents the full range.
+     */
+    void left (float speed);
+
+    /** Drive left motor forward and right motor backwards at the same speed to turn on the spot
+     * @param speed A normalised number 0 - 1.0 represents the full range.
+     */
+    void right (float speed);
+
+    /** Stop both motors
+     *
+     */
+    void stop (void);
+
+    /** Read the voltage of the potentiometer on the 3pi
+     * @returns voltage as a float
+     *
+     */
+    float pot_voltage(void);
+
+    /** Read the battery voltage on the 3pi
+     * @returns battery voltage as a float
+     */
+    float battery(void);
+
+    /** Read the position of the detected line
+     * @returns position as A normalised number -1.0 - 1.0 represents the full range.
+     *  -1.0 means line is on the left, or the line has been lost
+     *   0.0 means the line is in the middle
+     *   1.0 means the line is on the right
+     */
+    float line_position (void);
+
+
+    /** Calibrate the sensors. This turns the robot left then right, looking for a line
+     *
+     */
+    char sensor_auto_calibrate (void);
+
+    /** Set calibration manually to the current settings.
+     *
+     */
+    void calibrate(void);
+
+    /** Clear the current calibration settings
+     *
+     */
+    void reset_calibration (void);
+
+    void PID_start(int max_speed, int a, int b, int c, int d);
+
+    void PID_stop();
+
+    /** Write to the 8 LEDs
+     *
+     * @param leds An 8 bit value to put on the LEDs
+     */
+    void leds(int val);
+
+    /** Locate the cursor on the 8x2 LCD
+     *
+     * @param x The horizontal position, from 0 to 7
+     * @param y The vertical position, from 0 to 1
+     */
+    void locate(int x, int y);
+
+    /** Clear the LCD
+     *
+     */
+    void cls(void);
+
+    /** Send a character directly to the 3pi serial interface
+     * @param c The character to send to the 3pi
+     */
+    int putc(int c);
+
+    /** Receive a character directly to the 3pi serial interface
+     * @returns c The character received from the 3pi
+     */
+    int getc();
+
+    /** Send a string buffer to the 3pi serial interface
+     * @param text A pointer to a char array
+     * @param int The character to send to the 3pi
+     */
+    int print(char* text, int length);
+    
+    /** Send a string buffer to the 3pi serial interface for
+     * playing music. See here for details about the string's 
+     * format:
+     *   http://www.pololu.com/docs/0J18/3
+     * @param music A pointer to a char array
+     * @param length The length of the music string
+     */
+    void play(char* music, int length);
+
+#ifdef MBED_RPC
+    virtual const struct rpc_method *get_rpc_methods();
+#endif
+
+private :
+    DigitalOut _nrst;
+    Serial _ser;
+    
+    void motor (int motor, float speed);
+    virtual int _putc(int c);
+    virtual int _getc();
+};
+
+#endif
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