![](/media/cache/group/default_image.jpg.50x50_q85.jpg)
Control the wondrous spinning-frog game of Zuma's Revenge with a rotating chair and an Airzooka. Maps compass rotation, flex sensor and push button input to USB actions to control Zuma's Revenge (http://www.popcap.com/games/zumas-revenge/online)
Dependencies: LSM303DLHC mbed
Note that content for USB HID and USB Device is actually from the USBDevice mbed library. However, we made a couple of small changes to this library (allowing USB clicks at a particular location) that required us to break it off from the main project if we wanted to publish without pushing upstream.
main.cpp@0:4df415dde990, 2014-09-29 (annotated)
- Committer:
- andrewhead
- Date:
- Mon Sep 29 01:12:20 2014 +0000
- Revision:
- 0:4df415dde990
Initial Commit.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
andrewhead | 0:4df415dde990 | 1 | #include "mbed.h" |
andrewhead | 0:4df415dde990 | 2 | #include "LSM303DLHC.h" |
andrewhead | 0:4df415dde990 | 3 | #include "USBMouseKeyboard.h" |
andrewhead | 0:4df415dde990 | 4 | |
andrewhead | 0:4df415dde990 | 5 | |
andrewhead | 0:4df415dde990 | 6 | USBMouseKeyboard mouseKeyboard(ABS_MOUSE); |
andrewhead | 0:4df415dde990 | 7 | LSM303DLHC compass(PTC11, PTC10); |
andrewhead | 0:4df415dde990 | 8 | InterruptIn switchButton(D13); |
andrewhead | 0:4df415dde990 | 9 | AnalogIn fireButton(A0); |
andrewhead | 0:4df415dde990 | 10 | |
andrewhead | 0:4df415dde990 | 11 | |
andrewhead | 0:4df415dde990 | 12 | const float FLEX_THRESHOLD = .6; |
andrewhead | 0:4df415dde990 | 13 | float lastFlexValue = 0; |
andrewhead | 0:4df415dde990 | 14 | bool spaceHit = false; |
andrewhead | 0:4df415dde990 | 15 | |
andrewhead | 0:4df415dde990 | 16 | |
andrewhead | 0:4df415dde990 | 17 | void hitSpace(void) { |
andrewhead | 0:4df415dde990 | 18 | /* Register trigger that the SPACE control button has been hit */ |
andrewhead | 0:4df415dde990 | 19 | spaceHit = true; |
andrewhead | 0:4df415dde990 | 20 | } |
andrewhead | 0:4df415dde990 | 21 | |
andrewhead | 0:4df415dde990 | 22 | |
andrewhead | 0:4df415dde990 | 23 | bool wasFlexReleased(void) { |
andrewhead | 0:4df415dde990 | 24 | /* Check to see whether the flex sensor was released according to predetermined threshold. */ |
andrewhead | 0:4df415dde990 | 25 | bool released = false; |
andrewhead | 0:4df415dde990 | 26 | float flexValue = fireButton.read(); |
andrewhead | 0:4df415dde990 | 27 | if ((lastFlexValue > FLEX_THRESHOLD) && (flexValue < FLEX_THRESHOLD)) { |
andrewhead | 0:4df415dde990 | 28 | released = true; |
andrewhead | 0:4df415dde990 | 29 | } |
andrewhead | 0:4df415dde990 | 30 | lastFlexValue = flexValue; |
andrewhead | 0:4df415dde990 | 31 | return released; |
andrewhead | 0:4df415dde990 | 32 | } |
andrewhead | 0:4df415dde990 | 33 | |
andrewhead | 0:4df415dde990 | 34 | |
andrewhead | 0:4df415dde990 | 35 | int main(void) { |
andrewhead | 0:4df415dde990 | 36 | |
andrewhead | 0:4df415dde990 | 37 | /* Variables for sensing orientation */ |
andrewhead | 0:4df415dde990 | 38 | int16_t x_center = (X_MAX_ABS - X_MIN_ABS)/2; |
andrewhead | 0:4df415dde990 | 39 | int16_t y_center = (Y_MAX_ABS - Y_MIN_ABS)/2; |
andrewhead | 0:4df415dde990 | 40 | float xRot, yRot, nullRot; |
andrewhead | 0:4df415dde990 | 41 | int16_t xPos, yPos; |
andrewhead | 0:4df415dde990 | 42 | |
andrewhead | 0:4df415dde990 | 43 | /* When the switch button is hit, register SPACE getting hit */ |
andrewhead | 0:4df415dde990 | 44 | switchButton.fall(&hitSpace); |
andrewhead | 0:4df415dde990 | 45 | |
andrewhead | 0:4df415dde990 | 46 | while (1) { |
andrewhead | 0:4df415dde990 | 47 | /* This loop just checks sensors and maps them to keyboard and mouse motions that |
andrewhead | 0:4df415dde990 | 48 | will accurately enough control the game that has been opened in a browser |
andrewhead | 0:4df415dde990 | 49 | and centered in the middle of the screen. */ |
andrewhead | 0:4df415dde990 | 50 | |
andrewhead | 0:4df415dde990 | 51 | /* Detect rotation from the compass. We don't care about several compass variables, |
andrewhead | 0:4df415dde990 | 52 | (the ones returned into the nullRot variable) so we just pass in an unused variable. */ |
andrewhead | 0:4df415dde990 | 53 | /* The x and y that we compute don't appear to be perfectly accurate mappings to the |
andrewhead | 0:4df415dde990 | 54 | rotating compass -- the radius of the circle changes as one rotates. But the |
andrewhead | 0:4df415dde990 | 55 | heuristic effect we get below is good enough for playing Zuma. */ |
andrewhead | 0:4df415dde990 | 56 | compass.read(&nullRot, &nullRot, &nullRot, &xRot, &yRot, &nullRot); |
andrewhead | 0:4df415dde990 | 57 | xPos = x_center + int16_t(xRot * 12000); |
andrewhead | 0:4df415dde990 | 58 | yPos = y_center + int16_t(yRot * 12000); |
andrewhead | 0:4df415dde990 | 59 | |
andrewhead | 0:4df415dde990 | 60 | /* Move the mouse to a rotated position on a circle centered at the middle of the screen */ |
andrewhead | 0:4df415dde990 | 61 | mouseKeyboard.move(xPos, yPos); |
andrewhead | 0:4df415dde990 | 62 | |
andrewhead | 0:4df415dde990 | 63 | /* Check on flex sensor to see if ball was fired */ |
andrewhead | 0:4df415dde990 | 64 | bool fired = wasFlexReleased(); |
andrewhead | 0:4df415dde990 | 65 | if (fired) { |
andrewhead | 0:4df415dde990 | 66 | mouseKeyboard.click(xPos, yPos, MOUSE_LEFT); |
andrewhead | 0:4df415dde990 | 67 | } |
andrewhead | 0:4df415dde990 | 68 | |
andrewhead | 0:4df415dde990 | 69 | /* Check to see if button for hitting SPACE was triggered */ |
andrewhead | 0:4df415dde990 | 70 | if (spaceHit == true) { |
andrewhead | 0:4df415dde990 | 71 | mouseKeyboard.printf(" "); |
andrewhead | 0:4df415dde990 | 72 | spaceHit = false; |
andrewhead | 0:4df415dde990 | 73 | } |
andrewhead | 0:4df415dde990 | 74 | |
andrewhead | 0:4df415dde990 | 75 | /* Put a healthy amount of space between each iteration */ |
andrewhead | 0:4df415dde990 | 76 | wait_ms(10); |
andrewhead | 0:4df415dde990 | 77 | } |
andrewhead | 0:4df415dde990 | 78 | } |