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(made things a bit easier to read)

partial-rewrite
Ben Blazak 2012-04-30 14:05:25 -07:00
parent 2e4eeb430b
commit 5c2f6e64f4
1 changed files with 63 additions and 70 deletions
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133
src/keyboard/ergodox/teensy-2-0.c
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@ -36,19 +36,50 @@
* movable, and either are referenced explicitly or have macros defined for
* them elsewhere.
* - note: if you change pin assignments, please be sure to update
* "teensy-2-0.md".
* "teensy-2-0.md", and the '.svg' circuit diagram.
*/
// --- helpers
#define TEENSYPIN_WRITE(register, operation, pin) \
_TEENSYPIN_WRITE(register, operation, pin)
#define _TEENSYPIN_WRITE(register, operation, pin_letter, pin_number) \
#define teensypin_write(register, operation, pin) \
_teensypin_write(register, operation, pin)
#define _teensypin_write(register, operation, pin_letter, pin_number) \
((register##pin_letter) operation (1<<(pin_number)))
#define TEENSYPIN_READ(pin) \
_TEENSYPIN_READ(pin)
#define _TEENSYPIN_READ(pin_letter, pin_number) \
#define teensypin_read(pin) \
_teensypin_read(pin)
#define _teensypin_read(pin_letter, pin_number) \
((PIN##pin_letter) & (1<<(pin_number)))
#define teensypin_write_all_unused(register, operation) \
do { \
teensypin_write(register, operation, UNUSED_0); \
teensypin_write(register, operation, UNUSED_1); \
teensypin_write(register, operation, UNUSED_2); \
teensypin_write(register, operation, UNUSED_3); \
teensypin_write(register, operation, UNUSED_4); \
teensypin_write(register, operation, UNUSED_5); } \
while(0)
#define teensypin_write_all_row(register, operation) \
do { \
teensypin_write(register, operation, ROW_0); \
teensypin_write(register, operation, ROW_1); \
teensypin_write(register, operation, ROW_2); \
teensypin_write(register, operation, ROW_3); \
teensypin_write(register, operation, ROW_4); \
teensypin_write(register, operation, ROW_5); } \
while(0)
#define teensypin_write_all_column(register, operation) \
do { \
teensypin_write(register, operation, COLUMN_0); \
teensypin_write(register, operation, COLUMN_1); \
teensypin_write(register, operation, COLUMN_2); \
teensypin_write(register, operation, COLUMN_3); \
teensypin_write(register, operation, COLUMN_4); \
teensypin_write(register, operation, COLUMN_5); \
teensypin_write(register, operation, COLUMN_6); } \
while(0)
#define SET |=
#define CLEAR &=~
@ -101,54 +132,16 @@ uint8_t teensy_init(void) {
twi_init(); // on pins D(1,0)
// unused pins
// --- set as input
TEENSYPIN_WRITE(DDR, CLEAR, UNUSED_0);
TEENSYPIN_WRITE(DDR, CLEAR, UNUSED_1);
TEENSYPIN_WRITE(DDR, CLEAR, UNUSED_2);
TEENSYPIN_WRITE(DDR, CLEAR, UNUSED_3);
TEENSYPIN_WRITE(DDR, CLEAR, UNUSED_4);
TEENSYPIN_WRITE(DDR, CLEAR, UNUSED_5);
// --- set internal pull-up enabled
TEENSYPIN_WRITE(PORT, SET, UNUSED_0);
TEENSYPIN_WRITE(PORT, SET, UNUSED_1);
TEENSYPIN_WRITE(PORT, SET, UNUSED_2);
TEENSYPIN_WRITE(PORT, SET, UNUSED_3);
TEENSYPIN_WRITE(PORT, SET, UNUSED_4);
TEENSYPIN_WRITE(PORT, SET, UNUSED_5);
teensypin_write_all_unused(DDR, CLEAR); // set as input
teensypin_write_all_unused(PORT, SET); // set internal pull-up enabled
// rows
// --- set as input (hi-Z)
TEENSYPIN_WRITE(DDR, CLEAR, ROW_0);
TEENSYPIN_WRITE(DDR, CLEAR, ROW_1);
TEENSYPIN_WRITE(DDR, CLEAR, ROW_2);
TEENSYPIN_WRITE(DDR, CLEAR, ROW_3);
TEENSYPIN_WRITE(DDR, CLEAR, ROW_4);
TEENSYPIN_WRITE(DDR, CLEAR, ROW_5);
// --- set internal pull-up disabled
TEENSYPIN_WRITE(PORT, CLEAR, ROW_0);
TEENSYPIN_WRITE(PORT, CLEAR, ROW_1);
TEENSYPIN_WRITE(PORT, CLEAR, ROW_2);
TEENSYPIN_WRITE(PORT, CLEAR, ROW_3);
TEENSYPIN_WRITE(PORT, CLEAR, ROW_4);
TEENSYPIN_WRITE(PORT, CLEAR, ROW_5);
teensypin_write_all_row(DDR, CLEAR); // set as input (hi-Z)
teensypin_write_all_row(PORT, CLEAR); // set internal pull-up disabled
// columns
// --- set as input
TEENSYPIN_WRITE(DDR, CLEAR, COLUMN_0);
TEENSYPIN_WRITE(DDR, CLEAR, COLUMN_1);
TEENSYPIN_WRITE(DDR, CLEAR, COLUMN_2);
TEENSYPIN_WRITE(DDR, CLEAR, COLUMN_3);
TEENSYPIN_WRITE(DDR, CLEAR, COLUMN_4);
TEENSYPIN_WRITE(DDR, CLEAR, COLUMN_5);
TEENSYPIN_WRITE(DDR, CLEAR, COLUMN_6);
// --- set internal pull-up enabled
TEENSYPIN_WRITE(PORT, SET, COLUMN_0);
TEENSYPIN_WRITE(PORT, SET, COLUMN_1);
TEENSYPIN_WRITE(PORT, SET, COLUMN_2);
TEENSYPIN_WRITE(PORT, SET, COLUMN_3);
TEENSYPIN_WRITE(PORT, SET, COLUMN_4);
TEENSYPIN_WRITE(PORT, SET, COLUMN_5);
TEENSYPIN_WRITE(PORT, SET, COLUMN_6);
teensypin_write_all_column(DDR, CLEAR); // set as input
teensypin_write_all_column(PORT, SET); // set internal pull-up enabled
return 0; // success
}
@ -161,38 +154,38 @@ uint8_t teensy_init(void) {
#endif
static inline void _update_columns(
bool matrix[KB_ROWS][KB_COLUMNS], uint8_t row ) {
matrix[row][0] = ! TEENSYPIN_READ(COLUMN_0);
matrix[row][1] = ! TEENSYPIN_READ(COLUMN_1);
matrix[row][2] = ! TEENSYPIN_READ(COLUMN_2);
matrix[row][3] = ! TEENSYPIN_READ(COLUMN_3);
matrix[row][4] = ! TEENSYPIN_READ(COLUMN_4);
matrix[row][5] = ! TEENSYPIN_READ(COLUMN_5);
matrix[row][6] = ! TEENSYPIN_READ(COLUMN_6);
matrix[row][0] = ! teensypin_read(COLUMN_0);
matrix[row][1] = ! teensypin_read(COLUMN_1);
matrix[row][2] = ! teensypin_read(COLUMN_2);
matrix[row][3] = ! teensypin_read(COLUMN_3);
matrix[row][4] = ! teensypin_read(COLUMN_4);
matrix[row][5] = ! teensypin_read(COLUMN_5);
matrix[row][6] = ! teensypin_read(COLUMN_6);
}
uint8_t teensy_update_matrix(bool matrix[KB_ROWS][KB_COLUMNS]) {
TEENSYPIN_WRITE(DDR, SET, ROW_0); // set row low (set as output)
teensypin_write(DDR, SET, ROW_0); // set row low (set as output)
_update_columns(matrix, 0); // read col 0..6 and update matrix
TEENSYPIN_WRITE(DDR, CLEAR, ROW_0); // set row hi-Z (set as input)
teensypin_write(DDR, CLEAR, ROW_0); // set row hi-Z (set as input)
TEENSYPIN_WRITE(DDR, SET, ROW_1);
teensypin_write(DDR, SET, ROW_1);
_update_columns(matrix, 1);
TEENSYPIN_WRITE(DDR, CLEAR, ROW_1);
teensypin_write(DDR, CLEAR, ROW_1);
TEENSYPIN_WRITE(DDR, SET, ROW_2);
teensypin_write(DDR, SET, ROW_2);
_update_columns(matrix, 2);
TEENSYPIN_WRITE(DDR, CLEAR, ROW_2);
teensypin_write(DDR, CLEAR, ROW_2);
TEENSYPIN_WRITE(DDR, SET, ROW_3);
teensypin_write(DDR, SET, ROW_3);
_update_columns(matrix, 3);
TEENSYPIN_WRITE(DDR, CLEAR, ROW_3);
teensypin_write(DDR, CLEAR, ROW_3);
TEENSYPIN_WRITE(DDR, SET, ROW_4);
teensypin_write(DDR, SET, ROW_4);
_update_columns(matrix, 4);
TEENSYPIN_WRITE(DDR, CLEAR, ROW_4);
teensypin_write(DDR, CLEAR, ROW_4);
TEENSYPIN_WRITE(DDR, SET, ROW_5);
teensypin_write(DDR, SET, ROW_5);
_update_columns(matrix, 5);
TEENSYPIN_WRITE(DDR, CLEAR, ROW_5);
teensypin_write(DDR, CLEAR, ROW_5);
return 0; // success
}