Momentum-Apps/wii_anal_lcd.c

#include  "wii_anal.h"
#include  "gfx/images.h"     // Images

//----------------------------------------------------------------------------- ----------------------------------------
// A couple of monospaced hex fonts
//
const image_t*  img_6x8[16] = {
	&img_6x8_0, &img_6x8_1, &img_6x8_2, &img_6x8_3, &img_6x8_4, &img_6x8_5, &img_6x8_6, &img_6x8_7,
	&img_6x8_8, &img_6x8_9, &img_6x8_A, &img_6x8_B, &img_6x8_C, &img_6x8_D, &img_6x8_E, &img_6x8_F,
};

const image_t*  img_5x7[16] = {
	&img_5x7_0, &img_5x7_1, &img_5x7_2, &img_5x7_3, &img_5x7_4, &img_5x7_5, &img_5x7_6, &img_5x7_7,
	&img_5x7_8, &img_5x7_9, &img_5x7_A, &img_5x7_B, &img_5x7_C, &img_5x7_D, &img_5x7_E, &img_5x7_F,
};

//+============================================================================ ========================================
//	void  backlightOn (void)
//	{
//		// Acquire a handle for the system notification queue
//		// Do this ONCE ... at plugin startup
//		NotificationApp* notifications = furi_record_open(RECORD_NOTIFICATION);
//
//		// Pat the backlight watchdog
//		// Send the (predefined) message sequence {backlight_on, end}
//		// --> applications/notification/*.c
//		notification_message(notifications, &sequence_display_backlight_on);
//
//		// Release the handle for the system notification queue
//		// Do this ONCE ... at plugin quit
//		furi_record_close(RECORD_NOTIFICATION);
//	}
void  patBacklight (state_t* state)
{
	notification_message(state->notify, &sequence_display_backlight_on);
}

//============================================================================= ========================================
// Show a hex number in an inverted box (for ananlogue readings)
//
void  showHex ( Canvas* const canvas,  uint8_t x,  uint8_t y,
                const uint32_t val,  const uint8_t cnt,  const int b )
{
	canvas_set_color(canvas, ColorBlack);
	canvas_draw_box(canvas, x++,y++, 1 +(cnt *(6 +1)), 10);

	// thicken border
	if (b == 2)  canvas_draw_frame(canvas, x-2,y-2, 1 +(cnt *(6 +1))+2, 10+2);

	for (int i = (cnt -1) *4;  i >= 0;  i -= 4, x += 6+1)
		show(canvas, x,y, img_6x8[(val >>i) &0xF], SHOW_SET_WHT) ;
}

//============================================================================= ========================================
// Show the up/down "peak hold" controls in the bottom right
//
void  showPeakHold (state_t* const state,  Canvas* const canvas,  const int hold)
{
	switch (hold) {
		case 0:
			show(canvas, 119,51, &img_key_U, SHOW_CLR_BLK);
			show(canvas, 119,56, &img_key_D, SHOW_CLR_BLK);
			break;
		case +1:
			canvas_set_color(canvas, ColorBlack);
			canvas_draw_box(canvas, 120,52, 7,6);
			show(canvas, 119,51, &img_key_U, SHOW_CLR_WHT);
			show(canvas, 119,56, &img_key_D, SHOW_CLR_BLK);
			break;
		case -1:
			show(canvas, 119,51, &img_key_U, SHOW_CLR_BLK);
			canvas_draw_box(canvas, 120,57, 7,6);
			show(canvas, 119,56, &img_key_D, SHOW_CLR_WHT);
			break;
		default:
			break;
	}
	canvas_set_color(canvas, ColorBlack);
	canvas_draw_frame(canvas, 119,51, 9,13);

	// calibration indicator
	show( canvas, 108,55,
	      ((state->calib & CAL_RANGE) && (++state->flash &8)) ? &img_key_OKi : &img_key_OK,
	      SHOW_SET_BLK );
}

//============================================================================= ========================================
// This code performs a FULL calibration on the device EVERY time it draws a joystick 
//...This is NOT a good way forward for anything other than a test tool.
//
// Realistically you would do all the maths when the controller is connected
// or, if you prefer (and it IS a good thing), have a "calibrate controller" menu option 
// ...and then just use a lookup table, or trivial formual
//
// THIS algorithm chops the joystick in to one of 9 zones
//    Eg.  {FullLeft, Left3, Left2, Left1, Middle, Right1, Right2, Right3, FullRight}
// FullLeft and FullRight have a deadzone of N [qv. xDead] ..a total of N+1 positions
// Middle has a deadzone of N EACH WAY ...a total of 2N+1 positions
//
// If the remaining range does not divide evenly in to three zones, 
//   the first remainder is added to zone3,
//   and the second remainder (if there is one) is added to zone2
//   ...giving finer control near the centre of the joystick
//
// The value of the deadzone is based on the number of bits in the 
// joystcik {x,y} values - the larger the range, the larger the deadzone.
//
//          03                                  15                                        29
//         |<<|      Calibration points        |==|                                      |>>|
// 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
//          |---| |________________________| |------| |______________________________| |---|
//          |r=2| |       range = 9        | | r=3  | |        range = 11            | |r=2|
//  Zones:  |-4 | |-3     |-2      |-1     | |0     | |+1     |+2         |+3        | |+4 |
//
// This is not "the right way to do it" ...this is "one way to do it"
// Consider you application, and what the user is trying to achieve
//   Aim a gun - probably need to be more accurate
//   Turn and object - this is probably good enough
//   Start slowly & pick up speed - how about a log or sine curve?
//
void  showJoy ( Canvas* const canvas,  const uint8_t x,  const uint8_t y,  // x,y is the CENTRE of the Joystick
                const uint8_t xMin,  const uint8_t xMid,  const uint8_t xMax,
                const uint8_t yMin,  const uint8_t yMid,  const uint8_t yMax,
                const uint8_t xPos,  const uint8_t yPos,  const uint8_t bits )
{
	int  xOff  = 0;                   // final offset of joystick hat image
	int  yOff  = 0;

	int  xDead = (bits < 7) ? (1<<0) : (1<<3);  // dead zone (centre & limits)
	int  yDead = xDead;

	// This code is NOT optimised ...and it's still barely readable!
 	if ((xPos >= (xMid -xDead)) && (xPos <= (xMid +xDead)))  xOff =  0 ;  // centre [most likely]
	else if (xPos <= (xMin +xDead))                          xOff = -4 ;  // full left
	else if (xPos >= (xMax -xDead))                          xOff = +4 ;  // full right
	else if (xPos <  (xMid -xDead)) {                                     // part left
		// very much hard-coded for 3 interim positions
		int  lo    = (xMin +xDead) +1;       // lowest position
		int  hi    = (xMid -xDead) -1;       // highest position

		// this is the only duplicated bit of code
		int  range = (hi -lo) +1;            // range covered
		int  div   = range /3;               // each division (base amount, eg. 17/3==5)
		int  rem   = range -(div *3);        // remainder (ie. range%3)

//		int  hi1   = hi;                     // lowest  value for zone #-1
//		int  lo1   = hi1 -div +1;            // highest value for zone #-1
//		int  hi2   = lo1 -1;                 // lowest  value for zone #-2
//		int  lo2   = hi2 -div +1 -(rem==2);  // highest value for zone #-2 expand out remainder
//		int  hi3   = lo2 -1;                 // lowest  value for zone #-3
//		int  lo3   = hi3 -div +1 -(rem>=1);  // highest value for zone #-3 expand out remainder

		int  lo1   = hi -div +1;             // (in brevity)
		int  hi3   = hi -div -div -(rem==2); // ...

		if      (xPos <= hi3)  xOff = -3 ;  // zone #-3
		else if (xPos >= lo1)  xOff = -1 ;  // zone #-1
		else                   xOff = -2 ;  // zone #-2

	} else /*if (xPos > (xMid +xDead))*/ {                                // part right
		// very much hard-coded for 3 interim positions
		int  lo    = (xMid +xDead) +1;       // lowest position
		int  hi    = (xMax -xDead) -1;       // highest position

		int  range = (hi -lo) +1;            // range covered
		int  div   = range /3;               // each division (base amount, eg. 17/3==5)
		int  rem   = range -(div *3);        // remainder (ie. range%3)

//		int  lo1   = lo;                     // lowest  value for zone #+1
//		int  hi1   = lo +div -1;             // highest value for zone #+1
//		int  lo2   = hi1 +1;                 // lowest  value for zone #+2
//		int  hi2   = lo2 +div -1 +(rem==2);  // highest value for zone #+2 expand out remainder
//		int  lo3   = hi2 +1;                 // lowest  value for zone #+3
//		int  hi3   = lo3 +div -1 +(rem>=1);  // highest value for zone #+3 expand out remainder

		int  hi1   = lo +div -1;             // (in brevity)
		int  lo3   = lo +div +div +(rem==2); // ...

		if      (xPos <= hi1)  xOff = 1 ;  // zone #1
		else if (xPos >= lo3)  xOff = 3 ;  // zone #3
		else                   xOff = 2 ;  // zone #2
	}

	// All this to print a 3x3 square (in the right place) - LOL!
 	if ((yPos >= (yMid -yDead)) && (yPos <= (yMid +yDead)))  yOff =  0 ;  // centre [most likely]
	else if (yPos <= (yMin +yDead))                          yOff = +4 ;  // full down
	else if (yPos >= (yMax -yDead))                          yOff = -4 ;  // full up
	else if (yPos <  (yMid -yDead)) {                                     // part down
		int  lo    = (yMin +yDead) +1;       // lowest position
		int  hi    = (yMid -yDead) -1;       // highest position

		int  range = (hi -lo) +1;            // range covered
		int  div   = range /3;               // each division (base amount, eg. 17/3==5)
		int  rem   = range -(div *3);        // remainder (ie. range%3)

		int  lo1   = hi -div +1;             // (in brevity)
		int  hi3   = hi -div -div -(rem==2); // ...

		if      (yPos <= hi3)  yOff = +3 ;   // zone #3
		else if (yPos >= lo1)  yOff = +1 ;   // zone #1
		else                   yOff = +2 ;   // zone #2

	} else /*if (yPos > (yMid +yDead))*/ {                                // part up
		int  lo    = (yMid +yDead) +1;       // lowest position
		int  hi    = (yMax -yDead) -1;       // highest position

		int  range = (hi -lo) +1;            // range covered
		int  div   = range /3;               // each division (base amount, eg. 17/3==5)
		int  rem   = range -(div *3);        // remainder (ie. range%3)

		int  hi1   = lo +div -1;             // (in brevity)
		int  lo3   = lo +div +div +(rem==2); // ...

		if      (yPos <= hi1)  yOff = -1 ;   // zone #-1
		else if (yPos >= lo3)  yOff = -3 ;   // zone #-3
		else                   yOff = -2 ;   // zone #-2
	}

	show(canvas, x-(img_cc_Joy.w/2),y-(img_cc_Joy.h/2), &img_cc_Joy, SHOW_SET_BLK);

	// All ^that^ for v-this-v - LOL!!
	canvas_draw_box(canvas, (x-1)+xOff,(y-1)+yOff, 3,3);
}