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@5:80d551456856, 2016-10-06 (annotated)

Committer:
tomlankhorst
Date:
Thu Oct 06 12:54:02 2016 +0000
Revision:
5:80d551456856
Parent:
2:9c9226db4fb1
Child:
6:188304906687
USBDevice 1 revision back

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