94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
#include "ergodox_ez.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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__attribute__ ((weak))
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void * matrix_init_user(void) {
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};
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__attribute__ ((weak))
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void * matrix_scan_user(void) {
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};
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void * matrix_init_kb(void) {
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// keyboard LEDs (see "PWM on ports OC1(A|B|C)" in "teensy-2-0.md")
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TCCR1A = 0b10101001; // set and configure fast PWM
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TCCR1B = 0b00001001; // set and configure fast PWM
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// (tied to Vcc for hardware convenience)
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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-ip enabled
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DDRC &= ~(1<<7);
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DDRD &= ~(1<<7 | 1<<5 | 1<<4);
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DDRE &= ~(1<<6);
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PORTC |= (1<<7);
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PORTD |= (1<<7 | 1<<5 | 1<<4);
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PORTE |= (1<<6);
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ergodox_blink_all_leds();
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if (matrix_init_user) {
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(*matrix_init_user)();
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}
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};
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void * matrix_scan_kb(void) {
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if (matrix_scan_user) {
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(*matrix_scan_user)();
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}
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};
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void ergodox_blink_all_leds(void)
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{
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ergodox_led_all_off();
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ergodox_led_all_set(LED_BRIGHTNESS_HI);
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ergodox_led_all_on();
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_delay_ms(333);
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ergodox_led_all_off();
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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++;
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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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