#include <led.h>
#include <print.h>
#include <macro.h>
+#include <Lib/delay.h>
// Local Includes
#include "matrix_scan.h"
// Debounce Array
KeyState Matrix_scanArray[ Matrix_colsNum * Matrix_rowsNum ];
+// Ghost Arrays
+#ifdef GHOSTING_MATRIX
+KeyGhost Matrix_ghostArray[ Matrix_colsNum * Matrix_rowsNum ];
+
+uint8_t col_use[Matrix_colsNum], row_use[Matrix_rowsNum]; // used count
+uint8_t col_ghost[Matrix_colsNum], row_ghost[Matrix_rowsNum]; // marked as having ghost if 1
+#endif
+
+
// Matrix debug flag - If set to 1, for each keypress the scan code is displayed in hex
// If set to 2, for each key state change, the scan code is displayed along with the state
uint8_t matrixDebugMode = 0;
// Assumes 0x40 between GPIO Port registers and 0x1000 between PORT pin registers
// See Lib/mk20dx.h
volatile unsigned int *GPIO_PDDR = (unsigned int*)(&GPIOA_PDDR) + gpio_offset;
+ #ifndef GHOSTING_MATRIX
volatile unsigned int *GPIO_PSOR = (unsigned int*)(&GPIOA_PSOR) + gpio_offset;
+ #endif
volatile unsigned int *GPIO_PCOR = (unsigned int*)(&GPIOA_PCOR) + gpio_offset;
volatile unsigned int *GPIO_PDIR = (unsigned int*)(&GPIOA_PDIR) + gpio_offset;
volatile unsigned int *PORT_PCR = (unsigned int*)(&PORTA_PCR0) + port_offset;
switch ( type )
{
case Type_StrobeOn:
+ #ifdef GHOSTING_MATRIX
+ *GPIO_PCOR |= (1 << gpio.pin);
+ *GPIO_PDDR |= (1 << gpio.pin); // output, low
+ #else
*GPIO_PSOR |= (1 << gpio.pin);
+ #endif
break;
case Type_StrobeOff:
+ #ifdef GHOSTING_MATRIX
+ // Ghosting martix needs to put not used (off) strobes in high impedance state
+ *GPIO_PDDR &= ~(1 << gpio.pin); // input, high Z state
+ #endif
*GPIO_PCOR |= (1 << gpio.pin);
break;
case Type_StrobeSetup:
+ #ifdef GHOSTING_MATRIX
+ *GPIO_PDDR &= ~(1 << gpio.pin); // input, high Z state
+ *GPIO_PCOR |= (1 << gpio.pin);
+ #else
// Set as output pin
*GPIO_PDDR |= (1 << gpio.pin);
+ #endif
// Configure pin with slow slew, high drive strength and GPIO mux
*PORT_PCR = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
break;
case Type_Sense:
+ #ifdef GHOSTING_MATRIX // inverted
+ return *GPIO_PDIR & (1 << gpio.pin) ? 0 : 1;
+ #else
return *GPIO_PDIR & (1 << gpio.pin) ? 1 : 0;
+ #endif
case Type_SenseSetup:
// Set as input pin
Matrix_scanArray[ item ].activeCount = 0;
Matrix_scanArray[ item ].inactiveCount = DebounceDivThreshold_define; // Start at 'off' steady state
Matrix_scanArray[ item ].prevDecisionTime = 0;
+ #ifdef GHOSTING_MATRIX
+ Matrix_ghostArray[ item ].prev = KeyState_Off;
+ Matrix_ghostArray[ item ].cur = KeyState_Off;
+ Matrix_ghostArray[ item ].saved = KeyState_Off;
+ #endif
}
// Clear scan stats counters
// For each strobe, scan each of the sense pins
for ( uint8_t strobe = 0; strobe < Matrix_colsNum; strobe++ )
{
+ #ifdef STROBE_DELAY
+ uint32_t start = micros();
+ while ((micros() - start) < STROBE_DELAY);
+ #endif
+
// Strobe Pin
Matrix_pin( Matrix_cols[ strobe ], Type_StrobeOn );
+ #ifdef STROBE_DELAY
+ start = micros();
+ while ((micros() - start) < STROBE_DELAY);
+ #endif
+
// Scan each of the sense pins
for ( uint8_t sense = 0; sense < Matrix_rowsNum; sense++ )
{
state->prevDecisionTime = currentTime;
// Send keystate to macro module
+ #ifndef GHOSTING_MATRIX
Macro_keyState( key, state->curState );
+ #endif
// Matrix Debug, only if there is a state change
if ( matrixDebugMode && state->curState != state->prevState )
Matrix_pin( Matrix_cols[ strobe ], Type_StrobeOff );
}
+
+ // Matrix ghosting check and elimination
+ // . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
+#ifdef GHOSTING_MATRIX
+ // strobe = column, sense = row
+
+ // Count (rows) use for columns
+ //print("C ");
+ for ( uint8_t col = 0; col < Matrix_colsNum; col++ )
+ {
+ uint8_t used = 0;
+ for ( uint8_t row = 0; row < Matrix_rowsNum; row++ )
+ {
+ uint8_t key = Matrix_colsNum * row + col;
+ KeyState *state = &Matrix_scanArray[ key ];
+ if ( keyOn(state->curState) )
+ used++;
+ }
+ //printInt8(used);
+ col_use[col] = used;
+ col_ghost[col] = 0; // clear
+ }
+
+ // Count (columns) use for rows
+ //print(" R ");
+ for ( uint8_t row = 0; row < Matrix_rowsNum; row++ )
+ {
+ uint8_t used = 0;
+ for ( uint8_t col = 0; col < Matrix_colsNum; col++ )
+ {
+ uint8_t key = Matrix_colsNum * row + col;
+ KeyState *state = &Matrix_scanArray[ key ];
+ if ( keyOn(state->curState) )
+ used++;
+ }
+ //printInt8(used);
+ row_use[row] = used;
+ row_ghost[row] = 0; // clear
+ }
+
+ // Check if matrix has ghost
+ // Happens when key is pressed and some other key is pressed in same row and another in same column
+ //print(" G ");
+ for ( uint8_t col = 0; col < Matrix_colsNum; col++ )
+ {
+ for ( uint8_t row = 0; row < Matrix_rowsNum; row++ )
+ {
+ uint8_t key = Matrix_colsNum * row + col;
+ KeyState *state = &Matrix_scanArray[ key ];
+ if ( keyOn(state->curState) && col_use[col] >= 2 && row_use[row] >= 2 )
+ {
+ // mark col and row as having ghost
+ col_ghost[col] = 1;
+ row_ghost[row] = 1;
+ //print(" "); printInt8(col); print(","); printInt8(row);
+ }
+ }
+ }
+ //print( NL );
+
+ // Send keys
+ for ( uint8_t col = 0; col < Matrix_colsNum; col++ )
+ {
+ for ( uint8_t row = 0; row < Matrix_rowsNum; row++ )
+ {
+ uint8_t key = Matrix_colsNum * row + col;
+ KeyState *state = &Matrix_scanArray[ key ];
+ KeyGhost *st = &Matrix_ghostArray[ key ];
+
+ // col or row is ghosting (crossed)
+ uint8_t ghost = (col_ghost[col] > 0 || row_ghost[row] > 0) ? 1 : 0;
+
+ st->prev = st->cur; // previous
+ // save state if no ghost or outside ghosted area
+ if ( ghost == 0 )
+ st->saved = state->curState; // save state if no ghost
+ // final
+ // use saved state if ghosting, or current if not
+ st->cur = ghost > 0 ? st->saved : state->curState;
+
+ // Send keystate to macro module
+ KeyPosition k = !st->cur
+ ? (!st->prev ? KeyState_Off : KeyState_Release)
+ : ( st->prev ? KeyState_Hold : KeyState_Press);
+ Macro_keyState( key, k );
+ }
+ }
+#endif
+ // . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
+
+
// State Table Output Debug
if ( matrixDebugStateCounter > 0 )
{
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