81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
#include "dactyl.h"
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#include "i2cmaster.h"
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bool i2c_initialized = 0;
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uint8_t mcp23018_status = 0x20;
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void matrix_init_kb(void) {
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DDRB &= ~(1<<4); // set B(4) as input
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PORTB &= ~(1<<4); // set B(4) internal pull-up disabled
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// unused pins - C7, D4, D5, D7, E6
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// set as input with internal pull-up enabled
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DDRC &= ~(1<<7);
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DDRD &= ~(1<<5 | 1<<4);
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DDRE &= ~(1<<6);
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PORTC |= (1<<7);
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PORTD |= (1<<5 | 1<<4);
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PORTE |= (1<<6);
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matrix_init_user();
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}
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uint8_t init_mcp23018(void) {
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mcp23018_status = 0x20;
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// I2C subsystem
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if (i2c_initialized == 0) {
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i2c_init(); // on pins D(1,0)
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i2c_initialized = true;
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_delay_ms(1000);
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}
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// set pin direction
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// - unused : input : 1
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// - input : input : 1
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// - driving : output : 0
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mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
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mcp23018_status = i2c_write(IODIRA); if (mcp23018_status) goto out;
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mcp23018_status = i2c_write(0b00000000); if (mcp23018_status) goto out;
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mcp23018_status = i2c_write(0b00111111); if (mcp23018_status) goto out;
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i2c_stop();
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// set pull-up
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// - unused : on : 1
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// - input : on : 1
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// - driving : off : 0
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mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
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mcp23018_status = i2c_write(GPPUA); if (mcp23018_status) goto out;
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mcp23018_status = i2c_write(0b00000000); if (mcp23018_status) goto out;
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mcp23018_status = i2c_write(0b00111111); if (mcp23018_status) goto out;
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out:
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i2c_stop();
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return mcp23018_status;
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}
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#ifdef SWAP_HANDS_ENABLE
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__attribute__ ((weak))
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// swap-hands action needs a matrix to define the swap
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const keypos_t hand_swap_config[MATRIX_ROWS][MATRIX_COLS] = {
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/* Left hand, matrix positions */
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{{0,11}, {1,11}, {2,11}, {3,11}, {4,11}, {5,11}},
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{{0,10}, {1,10}, {2,10}, {3,10}, {4,10}, {5,10}},
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{{0,9}, {1,9}, {2,9}, {3,9}, {4,9}, {5,9}},
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{{0,8}, {1,8}, {2,8}, {3,8}, {4,8}, {5,8}},
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{{0,7}, {1,7}, {2,7}, {3,7}, {4,7}, {5,7}},
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{{0,6}, {1,6}, {2,6}, {3,6}, {4,6}, {5,6}},
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/* Right hand, matrix positions */
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{{0,5}, {1,5}, {2,5}, {3,5}, {4,5}, {5,5}},
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{{0,4}, {1,4}, {2,4}, {3,4}, {4,4}, {5,4}},
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{{0,3}, {1,3}, {2,3}, {3,3}, {4,3}, {5,3}},
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{{0,2}, {1,2}, {2,2}, {3,2}, {4,2}, {5,2}},
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{{0,1}, {1,1}, {2,1}, {3,1}, {4,1}, {5,1}},
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{{0,0}, {1,0}, {2,0}, {3,0}, {4,0}, {5,0}},
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};
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#endif
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