Rick Bisschop / HIDScope

A simple but very effective scope. Up to 6 channels of 32 bit float data at 1 kHz.

Dependencies:   QEI USBDevice

Fork of HIDScope by Tom Tom

HIDScope.h@7:b9f0bf62081e, 2016-11-03 (annotated)

Committer:
RickB
Date:
Thu Nov 03 13:47:47 2016 +0000
Revision:
7:b9f0bf62081e
Parent:
6:188304906687 
version to tutor

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tomlankhorst 0:79e3f3072f3b 1 #ifndef _HIDSCOPE_H_
tomlankhorst 0:79e3f3072f3b 2 #define _HIDSCOPE_H_
tomlankhorst 0:79e3f3072f3b 3
tomlankhorst 0:79e3f3072f3b 4 #include "mbed.h"
tomlankhorst 0:79e3f3072f3b 5 #include "USBHID.h"
tomlankhorst 0:79e3f3072f3b 6
tomlankhorst 6:188304906687 7 #if MBED_LIBRARY_VERSION != 119
tomlankhorst 6:188304906687 8 #error HIDScope: Please select MBED revision 119 as newer versions have some known problems with HID devices.
tomlankhorst 6:188304906687 9 #endif
tomlankhorst 6:188304906687 10
tomlankhorst 1:e44574634162 11 /** A simple HID (Human Interface Device) scope
tomlankhorst 1:e44574634162 12 * - Up to 6 channels of float data is transmitted in a single HID message (64 byte)
tomlankhorst 2:9c9226db4fb1 13 * - Theoretical maximum samplerate of 1kHz (due to HID specifications)
tomlankhorst 2:9c9226db4fb1 14 * - Data can be parsed using a client-side server
tomlankhorst 2:9c9226db4fb1 15 *
tomlankhorst 2:9c9226db4fb1 16 * See the following repository for PC software: https://bitbucket.org/tomlankhorst/hidscope
tomlankhorst 6:188304906687 17 *
tomlankhorst 6:188304906687 18 * There seem to be some issues with newest MBED revisions. Please select revision 119 for the time being.
tomlankhorst 1:e44574634162 19 *
tomlankhorst 1:e44574634162 20 * Example:
tomlankhorst 1:e44574634162 21 * @code
tomlankhorst 1:e44574634162 22 * #include "mbed.h"
tomlankhorst 2:9c9226db4fb1 23 * #include "HIDScope.h" // Require the HIDScope library
tomlankhorst 1:e44574634162 24 *
tomlankhorst 2:9c9226db4fb1 25 * HIDScope scope(2); // Instantize a 2-channel HIDScope object
tomlankhorst 2:9c9226db4fb1 26 * Ticker scopeTimer; // Instantize the timer for sending data to the PC
tomlankhorst 1:e44574634162 27 *
tomlankhorst 2:9c9226db4fb1 28 * AnalogIn a0(A0); // Using an analog input to obtain data
tomlankhorst 1:e44574634162 29 *
tomlankhorst 1:e44574634162 30 * int main()
tomlankhorst 1:e44574634162 31 * {
tomlankhorst 1:e44574634162 32 *
tomlankhorst 2:9c9226db4fb1 33 * // Attach the HIDScope::send function to the timer at a 10.000 us interval (100 Hz)
tomlankhorst 2:9c9226db4fb1 34 * scopeTimer.attach_us(&scope, &HIDScope::send, 1e4);
tomlankhorst 1:e44574634162 35 *
tomlankhorst 2:9c9226db4fb1 36 * // Read from the analog input in an endless loop. Two channels are written each iteration.
tomlankhorst 2:9c9226db4fb1 37 * // Note that the control loop can run at a different frequency (1 kHz in this case)
tomlankhorst 2:9c9226db4fb1 38 * while(1){
tomlankhorst 1:e44574634162 39 * scope.set(0, a0.read());
tomlankhorst 1:e44574634162 40 * scope.set(1, a0.read());
tomlankhorst 1:e44574634162 41 * wait_us(1000);
tomlankhorst 1:e44574634162 42 * };
tomlankhorst 1:e44574634162 43 *
tomlankhorst 1:e44574634162 44 * }
tomlankhorst 1:e44574634162 45 * @endcode
tomlankhorst 0:79e3f3072f3b 46 */
tomlankhorst 0:79e3f3072f3b 47 class HIDScope {
tomlankhorst 0:79e3f3072f3b 48 public:
tomlankhorst 0:79e3f3072f3b 49 ///Instantiate the HID Scope
tomlankhorst 5:80d551456856 50 HIDScope(int channels, bool non_blocking = true);
tomlankhorst 0:79e3f3072f3b 51
tomlankhorst 0:79e3f3072f3b 52 /** Sets the current channel value
tomlankhorst 0:79e3f3072f3b 53 @param ch : integer channel no (0-6)
tomlankhorst 0:79e3f3072f3b 54 @param val : float value
tomlankhorst 0:79e3f3072f3b 55 @return void
tomlankhorst 0:79e3f3072f3b 56 */
tomlankhorst 0:79e3f3072f3b 57 void set(int ch, float val);
tomlankhorst 0:79e3f3072f3b 58
tomlankhorst 0:79e3f3072f3b 59 /** Sets the current channel value
tomlankhorst 0:79e3f3072f3b 60 @param ch : integer channel no (0-6)
tomlankhorst 0:79e3f3072f3b 61 @param val : integer value
tomlankhorst 0:79e3f3072f3b 62 @return void
tomlankhorst 0:79e3f3072f3b 63 */
tomlankhorst 0:79e3f3072f3b 64 void set(int ch, int val);
tomlankhorst 0:79e3f3072f3b 65
tomlankhorst 0:79e3f3072f3b 66 /** Sets the current channel value
tomlankhorst 0:79e3f3072f3b 67 @param ch : integer channel no (0-6)
tomlankhorst 0:79e3f3072f3b 68 @param val : boolean value
tomlankhorst 0:79e3f3072f3b 69 @return void
tomlankhorst 0:79e3f3072f3b 70 */
tomlankhorst 0:79e3f3072f3b 71 void set(int ch, bool val);
tomlankhorst 0:79e3f3072f3b 72
tomlankhorst 0:79e3f3072f3b 73 /** Sets the current channel value
tomlankhorst 0:79e3f3072f3b 74 @param ch : double channel no (0-6)
tomlankhorst 0:79e3f3072f3b 75 @param val : float value
tomlankhorst 0:79e3f3072f3b 76 @return void
tomlankhorst 0:79e3f3072f3b 77 */
tomlankhorst 0:79e3f3072f3b 78 void set(int ch, double val);
tomlankhorst 0:79e3f3072f3b 79
tomlankhorst 0:79e3f3072f3b 80 /** Sends the channel data to the HID client
tomlankhorst 0:79e3f3072f3b 81 @return void
tomlankhorst 0:79e3f3072f3b 82 */
tomlankhorst 0:79e3f3072f3b 83 void send();
tomlankhorst 0:79e3f3072f3b 84 private:
tomlankhorst 5:80d551456856 85 bool send_non_blocking;
tomlankhorst 0:79e3f3072f3b 86 USBHID hid;
tomlankhorst 0:79e3f3072f3b 87 HID_REPORT scopeData;
tomlankhorst 0:79e3f3072f3b 88 float* bufferData;
tomlankhorst 0:79e3f3072f3b 89 int channelCount;
tomlankhorst 0:79e3f3072f3b 90 };
tomlankhorst 0:79e3f3072f3b 91
tomlankhorst 0:79e3f3072f3b 92 #endif