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Rewrite the Bathroom Epiphanies Frosty Flake matrix and LED handling (#8243)

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* Keyboard: revamp frosty-flake leds

This commit transitions bpiphany/frosty_flake to led_update_{kb,user}
and rewrites the AVR bit twiddling logic to use the standard QMK GPIO
API.

* Keyboard: rewrite frosty_flake's matrix reader to be a lite custom matrix

This commit replaces frosty_flake's custom matrix and debounce logic
with a "lite" custom matrix. In addition to being somewhat clearer, this
allows a consumer of the flake board to choose their own debouncing
algorithm. The one closest to the implementation originally in use is
sym_g, but this opens us up to supporting eager_pk and eager_pr.

The original matrix code was 18 columns for 8 rows, but using a single
row read and unpacking the bits into individual columns. To simplify,
I've changed the key layout to be 8C 18R instead of 18C 8R: this lets us
use a single read directly into the matrix _and_ drop down to a uint8_t
instead of a uint32_t for matrix_row_t.

Since we're no longer implementing our own debouncing and row unpacking,
we save ~400 bytes on the final firmware image.

Fully tested against a CM Storm QFR hosting the flake -- this commit
message was written using the new matrix code.

Firmware Sizes (assuming stock configuration as of 42d6270f2)

Matrix+Debounce     Size (bytes)
---------------     ------------
original            17740
new + sym_g         17284
new + eager_pr      18106
new + eager_pk      18204

I expect that there are some scanning speed benefits as well.

* Keyboard: update frosty_flake's UNUSED_PINS

* Keyboard: Remove meaningless weak redefinitions from frosty

These are not necessary (and all of them already live somewhere in
Quantum).
This commit is contained in:
Dustin L. Howett 2020-03-01 21:17:09 -08:00 • committed by GitHub
parent 78069d4826
commit b72a1aa3fe
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 77 additions and 168 deletions
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106
keyboards/bpiphany/frosty_flake/matrix.c
View file

@ -15,42 +15,15 @@
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <stdbool.h>
#include <avr/io.h>
#include <util/delay.h>
#include "print.h"
#include "debug.h"
#include "util.h"
#include "matrix.h"
#ifndef DEBOUNCE
# define DEBOUNCE 5
#endif
static uint8_t debouncing = DEBOUNCE;
static matrix_row_t matrix[MATRIX_ROWS];
static matrix_row_t matrix_debouncing[MATRIX_ROWS];
__attribute__ ((weak))
void matrix_init_kb(void) {
matrix_init_user();
}
__attribute__ ((weak))
void matrix_scan_kb(void) {
matrix_scan_user();
}
__attribute__ ((weak))
void matrix_init_user(void) {
}
__attribute__ ((weak))
void matrix_scan_user(void) {
}
static matrix_row_t scan_col(void) {
// Each of the 8 columns is read off pins as below
// 7 6 5 4 3 2 1 0
// ,--,--,--,--,--,--,--,--,
// |B0|B3|B2|B1|B6|B4|B5|C7|
// `--`--`--`--`--`--`--`--`
return (
(PINC&(1<<7) ? 0 : ((matrix_row_t)1<<0)) |
(PINB&(1<<5) ? 0 : ((matrix_row_t)1<<1)) |
@ -63,8 +36,8 @@ static matrix_row_t scan_col(void) {
);
}
static void select_col(uint8_t col) {
switch (col) {
static void select_row(uint8_t row) {
switch (row) {
case 0: PORTD = (PORTD & ~0b01111011) | 0b00011011; break;
case 1: PORTD = (PORTD & ~0b01111011) | 0b01000011; break;
case 2: PORTD = (PORTD & ~0b01111011) | 0b01101010; break;
@ -86,7 +59,7 @@ static void select_col(uint8_t col) {
}
}
void matrix_init(void) {
void matrix_init_custom(void) {
/* Row output pins */
DDRD |= 0b01111011;
/* Column input pins */
@ -94,62 +67,19 @@ void matrix_init(void) {
DDRB &= ~0b01111111;
PORTC |= 0b10000000;
PORTB |= 0b01111111;
for (uint8_t i=0; i < MATRIX_ROWS; i++)
matrix[i] = matrix_debouncing[i] = 0;
matrix_init_quantum();
}
uint8_t matrix_scan(void) {
for (uint8_t col = 0; col < MATRIX_COLS; col++) {
select_col(col);
_delay_us(3);
matrix_row_t col_scan = scan_col();
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
bool curr_bit = col_scan & (1<<row);
if (prev_bit != curr_bit) {
matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
debouncing = DEBOUNCE;
}
}
}
if (debouncing) {
if (--debouncing)
_delay_ms(1);
else
for (uint8_t i = 0; i < MATRIX_ROWS; i++)
matrix[i] = matrix_debouncing[i];
}
matrix_scan_quantum();
return 1;
}
inline matrix_row_t matrix_get_row(uint8_t row) {
return matrix[row];
}
void matrix_print(void) {
#ifndef NO_PRINT
print("\nr\\c ABCDEFGHIJKLMNOPQR\n");
// matrix is 18 uint8_t.
// we select the row (one of 18), then read the column
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
bool has_changed = false;
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
matrix_row_t matrix_row = matrix_get_row(row);
xprintf("%02X: ", row);
for (uint8_t col = 0; col < MATRIX_COLS; col++) {
bool curr_bit = matrix_row & (1<<col);
xprintf("%c", curr_bit ? '*' : '.');
}
print("\n");
matrix_row_t orig = current_matrix[row];
select_row(row);
_delay_us(3);
current_matrix[row] = scan_col();
has_changed |= (orig != current_matrix[row]);
}
#endif
}
uint8_t matrix_key_count(void) {
uint8_t count = 0;
for (uint8_t row = 0; row < MATRIX_ROWS; row++)
count += bitpop32(matrix[row]);
return count;
return has_changed;
}