Merge remote-tracking branch 'origin/master' into develop
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						38afc7e4cc
					
				
					 4 changed files with 6 additions and 5 deletions
				
			
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					@ -34,7 +34,7 @@ extern i2c_status_t tca9555_status;
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// All address pins of the tca9555 are connected to the ground
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					// All address pins of the tca9555 are connected to the ground
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// | 0  | 1  | 0  | 0  | A2 | A1 | A0 |
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					// | 0  | 1  | 0  | 0  | A2 | A1 | A0 |
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// | 0  | 1  | 0  | 0  | 0  | 0  | 0  |
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					// | 0  | 1  | 0  | 0  | 0  | 0  | 0  |
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#define I2C_ADDR 0b0100000
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					#define I2C_ADDR (0b0100000 << 1)
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// Register addresses
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					// Register addresses
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#define IODIRA 0x06  // i/o direction register
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					#define IODIRA 0x06  // i/o direction register
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					@ -34,7 +34,7 @@ extern i2c_status_t tca9555_status;
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// All address pins of the tca9555 are connected to the ground
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					// All address pins of the tca9555 are connected to the ground
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// | 0  | 1  | 0  | 0  | A2 | A1 | A0 |
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					// | 0  | 1  | 0  | 0  | A2 | A1 | A0 |
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// | 0  | 1  | 0  | 0  | 0  | 0  | 0  |
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					// | 0  | 1  | 0  | 0  | 0  | 0  | 0  |
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#define I2C_ADDR 0b0100000
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					#define I2C_ADDR (0b0100000 << 1)
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// Register addresses
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					// Register addresses
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#define IODIRA 0x06  // i/o direction register
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					#define IODIRA 0x06  // i/o direction register
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					@ -192,6 +192,7 @@ static matrix_row_t read_cols(uint8_t row) {
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                // do nothing
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					                // do nothing
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                return 0;
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					                return 0;
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            } else {
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					            } else {
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					                port0 = ~port0;
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                // We read all the pins on GPIOA.
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					                // We read all the pins on GPIOA.
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                // The initial state was all ones and any depressed key at a given column for the currently selected row will have its bit flipped to zero.
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					                // The initial state was all ones and any depressed key at a given column for the currently selected row will have its bit flipped to zero.
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                // The return value is a row as represented in the generic matrix code were the rightmost bits represent the lower columns and zeroes represent non-depressed keys while ones represent depressed keys.
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					                // The return value is a row as represented in the generic matrix code were the rightmost bits represent the lower columns and zeroes represent non-depressed keys while ones represent depressed keys.
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					@ -247,7 +248,7 @@ static void select_row(uint8_t row) {
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                default:                    break;
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					                default:                    break;
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            }
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					            }
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            tca9555_status = i2c_writeReg(I2C_ADDR, OREGP1, &port1, 2, I2C_TIMEOUT);
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					            tca9555_status = i2c_writeReg(I2C_ADDR, OREGP1, &port1, 1, I2C_TIMEOUT);
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            // Select the desired row by writing a byte for the entire GPIOB bus where only the bit representing the row we want to select is a zero (write instruction) and every other bit is a one.
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					            // Select the desired row by writing a byte for the entire GPIOB bus where only the bit representing the row we want to select is a zero (write instruction) and every other bit is a one.
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            // Note that the row - MATRIX_ROWS_PER_SIDE reflects the fact that being on the right hand, the columns are numbered from MATRIX_ROWS_PER_SIDE to MATRIX_ROWS, but the pins we want to write to are indexed from zero up on the GPIOB bus.
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					            // Note that the row - MATRIX_ROWS_PER_SIDE reflects the fact that being on the right hand, the columns are numbered from MATRIX_ROWS_PER_SIDE to MATRIX_ROWS, but the pins we want to write to are indexed from zero up on the GPIOB bus.
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        }
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					        }
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					@ -6,7 +6,7 @@
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#include "i2c_master.h"
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					#include "i2c_master.h"
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#include <util/delay.h>
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					#include <util/delay.h>
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#define I2C_ADDR        0b0100000
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					#define I2C_ADDR        (0b0100000 << 1)
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#define I2C_TIMEOUT     100
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					#define I2C_TIMEOUT     100
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#define IODIRA          0x00            // i/o direction register
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					#define IODIRA          0x00            // i/o direction register
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#define IODIRB          0x01
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					#define IODIRB          0x01
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					@ -7,7 +7,7 @@
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#include <util/delay.h>
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					#include <util/delay.h>
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/* I2C aliases and register addresses (see "mcp23018.md") */
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					/* I2C aliases and register addresses (see "mcp23018.md") */
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#define I2C_ADDR        0b0100000
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					#define I2C_ADDR        (0b0100000 << 1)
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#define I2C_TIMEOUT     100
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					#define I2C_TIMEOUT     100
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#define IODIRA          0x00            /* i/o direction register */
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					#define IODIRA          0x00            /* i/o direction register */
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#define IODIRB          0x01
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					#define IODIRB          0x01
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