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@ -30,65 +30,69 @@ |
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//_____Utility funcs___________________________________________________________ |
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static void init_pins(void) { |
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// init all cols high - IC2 all input |
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pca9555_set_config(IC2, PCA9555_PORT0, ALL_INPUT);//same as initial state |
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pca9555_set_config(IC2, PCA9555_PORT1, ALL_INPUT);//same as initial state |
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// init all cols high - IC2 all input |
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pca9555_set_config(IC2, PCA9555_PORT0, ALL_INPUT); // same as initial state |
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pca9555_set_config(IC2, PCA9555_PORT1, ALL_INPUT); // same as initial state |
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// init all rows - IC1 port0 input |
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pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT);//same as initial state |
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// init all rows - IC1 port0 input |
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pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT); // same as initial state |
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pca9555_set_output(IC1, PCA9555_PORT0, ALL_LOW); |
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} |
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static void select_row(uint8_t row) { |
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// For the XD84 all rows are on the same IC and port |
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// so its safe enough to assume here row == pin |
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uint8_t pin = row; |
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uint8_t mask = 1 << pin; |
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pca9555_set_output(IC1, PCA9555_PORT0, ALL_HIGH & (~mask)); |
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pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT & (~mask)); |
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// For the XD84 all rows are on the same IC and port |
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// so its safe enough to assume here row == pin |
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uint8_t pin = row; |
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uint8_t mask = 1 << pin; |
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// we configure output once in init, as pca9555 remembers state when flipping between input/output |
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// pca9555_set_output(IC1, PCA9555_PORT0, ALL_HIGH & (~mask)); |
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pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT & (~mask)); |
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} |
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static uint16_t read_cols(void) { |
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uint16_t state_1 = pca9555_readPins(IC2, PCA9555_PORT0); |
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uint16_t state_2 = pca9555_readPins(IC2, PCA9555_PORT1); |
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// For the XD84 all cols are on the same IC and mapped sequentially |
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// while this technically gives 16 column reads, |
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// the 16th column can never be set so is safely ignored |
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return ~((state_2 << 8) | state_1); |
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// uint16_t state_1 = pca9555_readPins(IC2, PCA9555_PORT0); |
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// uint16_t state_2 = pca9555_readPins(IC2, PCA9555_PORT1); |
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uint16_t state = pca9555_readAllPins(IC2); |
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// For the XD84 all cols are on the same IC and mapped sequentially |
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// while this technically gives 16 column reads, |
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// the 16th column can never be set so is safely ignored |
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// return ~((state_2 << 8) | state_1); |
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return ~state; |
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} |
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static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) { |
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// Store last value of row prior to reading |
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matrix_row_t last_row_value = current_matrix[current_row]; |
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// Store last value of row prior to reading |
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matrix_row_t last_row_value = current_matrix[current_row]; |
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// Clear data in matrix row |
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current_matrix[current_row] = 0; |
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// Clear data in matrix row |
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current_matrix[current_row] = 0; |
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// Select row and wait for row selection to stabilize |
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select_row(current_row); |
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wait_us(30); |
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// Select row and wait for row selection to stabilize |
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select_row(current_row); |
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// Skip the wait_us(30); as i2c is slow enough to debounce the io changes |
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current_matrix[current_row] = read_cols(); |
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current_matrix[current_row] = read_cols(); |
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// No need to Unselect row as the next `select_row` will blank everything |
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// No need to Unselect row as the next `select_row` will blank everything |
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return (last_row_value != current_matrix[current_row]); |
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return (last_row_value != current_matrix[current_row]); |
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} |
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//_____CUSTOM MATRIX IMPLEMENTATION____________________________________________________ |
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void custom_matrix_init(void) { |
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pca9555_init(IC1); |
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pca9555_init(IC2); |
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pca9555_init(IC1); |
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pca9555_init(IC2); |
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init_pins(); |
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init_pins(); |
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} |
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bool custom_matrix_scan(matrix_row_t current_matrix[]) { |
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bool changed = false; |
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for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) { |
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changed |= read_cols_on_row(current_matrix, current_row); |
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} |
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return changed; |
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} |
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bool changed = false; |
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for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) { |
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changed |= read_cols_on_row(current_matrix, current_row); |
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} |
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return changed; |
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} |