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authorJoel Challis <git@zvecr.com>2019-12-03 19:39:21 +0000
committerGitHub <noreply@github.com>2019-12-03 19:39:21 +0000
commit1718dfa658dbe8ad144100b561794c5596ac5f08 (patch)
treeb6252940f7b149efb3fd65bea40b4d353e01e973 /keyboards/xd84
parent1c8208ad9a0d1a8cd423aea3ffb0aa5e370e1541 (diff)
Increase matrix scanning speed on xd84 (#7517)
* Increase matrix scanning speed * Fix func name in failure output
Diffstat (limited to 'keyboards/xd84')
-rw-r--r--keyboards/xd84/matrix.c80
1 files changed, 42 insertions, 38 deletions
diff --git a/keyboards/xd84/matrix.c b/keyboards/xd84/matrix.c
index 4cb5544ca4..a4ddbee9a0 100644
--- a/keyboards/xd84/matrix.c
+++ b/keyboards/xd84/matrix.c
@@ -30,65 +30,69 @@
//_____Utility funcs___________________________________________________________
static void init_pins(void) {
- // init all cols high - IC2 all input
- pca9555_set_config(IC2, PCA9555_PORT0, ALL_INPUT);//same as initial state
- pca9555_set_config(IC2, PCA9555_PORT1, ALL_INPUT);//same as initial state
+ // init all cols high - IC2 all input
+ pca9555_set_config(IC2, PCA9555_PORT0, ALL_INPUT); // same as initial state
+ pca9555_set_config(IC2, PCA9555_PORT1, ALL_INPUT); // same as initial state
- // init all rows - IC1 port0 input
- pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT);//same as initial state
+ // init all rows - IC1 port0 input
+ pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT); // same as initial state
+ pca9555_set_output(IC1, PCA9555_PORT0, ALL_LOW);
}
static void select_row(uint8_t row) {
- // For the XD84 all rows are on the same IC and port
- // so its safe enough to assume here row == pin
- uint8_t pin = row;
- uint8_t mask = 1 << pin;
-
- pca9555_set_output(IC1, PCA9555_PORT0, ALL_HIGH & (~mask));
- pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT & (~mask));
+ // For the XD84 all rows are on the same IC and port
+ // so its safe enough to assume here row == pin
+ uint8_t pin = row;
+ uint8_t mask = 1 << pin;
+
+ // we configure output once in init, as pca9555 remembers state when flipping between input/output
+ // pca9555_set_output(IC1, PCA9555_PORT0, ALL_HIGH & (~mask));
+ pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT & (~mask));
}
static uint16_t read_cols(void) {
- uint16_t state_1 = pca9555_readPins(IC2, PCA9555_PORT0);
- uint16_t state_2 = pca9555_readPins(IC2, PCA9555_PORT1);
-
- // For the XD84 all cols are on the same IC and mapped sequentially
- // while this technically gives 16 column reads,
- // the 16th column can never be set so is safely ignored
- return ~((state_2 << 8) | state_1);
+ // uint16_t state_1 = pca9555_readPins(IC2, PCA9555_PORT0);
+ // uint16_t state_2 = pca9555_readPins(IC2, PCA9555_PORT1);
+ uint16_t state = pca9555_readAllPins(IC2);
+
+ // For the XD84 all cols are on the same IC and mapped sequentially
+ // while this technically gives 16 column reads,
+ // the 16th column can never be set so is safely ignored
+ // return ~((state_2 << 8) | state_1);
+ return ~state;
}
static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
- // Store last value of row prior to reading
- matrix_row_t last_row_value = current_matrix[current_row];
+ // Store last value of row prior to reading
+ matrix_row_t last_row_value = current_matrix[current_row];
- // Clear data in matrix row
- current_matrix[current_row] = 0;
+ // Clear data in matrix row
+ current_matrix[current_row] = 0;
- // Select row and wait for row selection to stabilize
- select_row(current_row);
- wait_us(30);
+ // Select row and wait for row selection to stabilize
+ select_row(current_row);
+ // Skip the wait_us(30); as i2c is slow enough to debounce the io changes
- current_matrix[current_row] = read_cols();
+ current_matrix[current_row] = read_cols();
- // No need to Unselect row as the next `select_row` will blank everything
+ // No need to Unselect row as the next `select_row` will blank everything
- return (last_row_value != current_matrix[current_row]);
+ return (last_row_value != current_matrix[current_row]);
}
//_____CUSTOM MATRIX IMPLEMENTATION____________________________________________________
void custom_matrix_init(void) {
- pca9555_init(IC1);
- pca9555_init(IC2);
+ pca9555_init(IC1);
+ pca9555_init(IC2);
- init_pins();
+ init_pins();
}
bool custom_matrix_scan(matrix_row_t current_matrix[]) {
- bool changed = false;
- for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
- changed |= read_cols_on_row(current_matrix, current_row);
- }
- return changed;
-} \ No newline at end of file
+ bool changed = false;
+ for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+ changed |= read_cols_on_row(current_matrix, current_row);
+ }
+ return changed;
+}