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output previous key state on TP1684 when scaning matrix.

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This commit is contained in:
tmk 2010-11-06 01:58:47 +09:00
parent 89feab2301
commit 2ca3ab18a2
2 changed files with 31 additions and 14 deletions
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28
hhkb/matrix.c
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@ -19,13 +19,15 @@
// PB3, PB4, PB5, PB6(A, B, C, D)
// use D as ENABLE: (enable: 0/unenable: 1)
// key: KEY: (on: 0/ off:1)
// UNKNOWN: unknown whether input or output
// PE6,PE7(KEY, UNKNOWN)
// KEY_PREV: (on: 1/ off: 0)
// PE6,PE7(KEY, KEY_PREV)
#define COL_ENABLE (1<<6)
#define KEY_SELELCT(ROW, COL) (PORTB = COL_ENABLE|(((COL)&0x07)<<3)|((ROW)&0x07))
#define KEY_ENABLE (PORTB &= ~COL_ENABLE)
#define KEY_UNABLE (PORTB |= COL_ENABLE)
#define KEY_ON ((PINE&(1<<6)) ? false : true)
#define KEY_STATE (PINE&(1<<6))
#define KEY_PREV_ON (PORTE |= (1<<7))
#define KEY_PREV_OFF (PORTE &= ~(1<<7))
// matrix state buffer
static uint8_t *matrix;
@ -52,9 +54,10 @@ void matrix_init(void)
// row & col output(PB0-6)
DDRB = 0xFF;
PORTB = KEY_SELELCT(0, 0);
// KEY & VALID input with pullup(PE6,7)
DDRE = 0x3F;
PORTE = 0xC0;
// KEY: input with pullup(PE6)
// KEY_PREV: output(PE7)
DDRE = 0xBF;
PORTE = 0x40;
// initialize matrix state: all keys off
for (int i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
@ -74,14 +77,19 @@ int matrix_scan(void)
for (int row = 0; row < MATRIX_ROWS; row++) {
for (int col = 0; col < MATRIX_COLS; col++) {
KEY_SELELCT(row, col);
_delay_us(50); // from logic analyzer chart
_delay_us(40); // from logic analyzer chart
if (matrix_prev[row] & (1<<col)) {
KEY_PREV_ON;
}
_delay_us(7); // from logic analyzer chart
KEY_ENABLE;
_delay_us(10); // from logic analyzer chart
if (KEY_ON) {
matrix[row] |= (1<<col);
} else {
if (KEY_STATE) {
matrix[row] &= ~(1<<col);
} else {
matrix[row] |= (1<<col);
}
KEY_PREV_OFF;
KEY_UNABLE;
_delay_us(150); // from logic analyzer chart
}