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#include "ergodox_ez.h"
#include "i2cmaster.h"
bool i2c_initialized = 0;
uint8_t mcp23018_status = 0x20;
bool ergodox_left_led_1 = 0; // left top
bool ergodox_left_led_2 = 0; // left middle
bool ergodox_left_led_3 = 0; // left bottom
__attribute__ ((weak))
void * matrix_init_user(void) {
};
__attribute__ ((weak))
void * matrix_scan_user(void) {
};
void * matrix_init_kb(void) {
// keyboard LEDs (see "PWM on ports OC1(A|B|C)" in "teensy-2-0.md")
TCCR1A = 0b10101001; // set and configure fast PWM
TCCR1B = 0b00001001; // set and configure fast PWM
// (tied to Vcc for hardware convenience)
DDRB &= ~(1<<4); // set B(4) as input
PORTB &= ~(1<<4); // set B(4) internal pull-up disabled
// unused pins - C7, D4, D5, D7, E6
// set as input with internal pull-ip enabled
DDRC &= ~(1<<7);
DDRD &= ~(1<<7 | 1<<5 | 1<<4);
DDRE &= ~(1<<6);
PORTC |= (1<<7);
PORTD |= (1<<7 | 1<<5 | 1<<4);
PORTE |= (1<<6);
ergodox_blink_all_leds();
if (matrix_init_user) {
(*matrix_init_user)();
}
};
void * matrix_scan_kb(void) {
if (matrix_scan_user) {
(*matrix_scan_user)();
}
};
void ergodox_blink_all_leds(void)
{
ergodox_led_all_off();
ergodox_led_all_set(LED_BRIGHTNESS_HI);
ergodox_led_all_on();
_delay_ms(333);
ergodox_led_all_off();
}
uint8_t init_mcp23018(void) {
mcp23018_status = 0x20;
// I2C subsystem
if (i2c_initialized == 0) {
i2c_init(); // on pins D(1,0)
i2c_initialized++;
_delay_ms(1000);
}
// set pin direction
// - unused : input : 1
// - input : input : 1
// - driving : output : 0
mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
mcp23018_status = i2c_write(IODIRA); if (mcp23018_status) goto out;
mcp23018_status = i2c_write(0b00000000); if (mcp23018_status) goto out;
mcp23018_status = i2c_write(0b00111111); if (mcp23018_status) goto out;
i2c_stop();
// set pull-up
// - unused : on : 1
// - input : on : 1
// - driving : off : 0
mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
mcp23018_status = i2c_write(GPPUA); if (mcp23018_status) goto out;
mcp23018_status = i2c_write(0b00000000); if (mcp23018_status) goto out;
mcp23018_status = i2c_write(0b00111111); if (mcp23018_status) goto out;
out:
i2c_stop();
if (!mcp23018_status) mcp23018_status = ergodox_left_leds_update();
return mcp23018_status;
}
uint8_t ergodox_left_leds_update(void) {
if (mcp23018_status) { // if there was an error
return mcp23018_status;
}
// set logical value (doesn't matter on inputs)
// - unused : hi-Z : 1
// - input : hi-Z : 1
// - driving : hi-Z : 1
mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
mcp23018_status = i2c_write(OLATA); if (mcp23018_status) goto out;
mcp23018_status = i2c_write(0b11111111
& ~(ergodox_left_led_3<<LEFT_LED_3_SHIFT)
); if (mcp23018_status) goto out;
mcp23018_status = i2c_write(0b11111111
& ~(ergodox_left_led_2<<LEFT_LED_2_SHIFT)
& ~(ergodox_left_led_1<<LEFT_LED_1_SHIFT)
); if (mcp23018_status) goto out;
out:
i2c_stop();
return mcp23018_status;
}
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