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#include "frenchdev.h"
#include "i2cmaster.h"
bool i2c_initialized = 0;
uint8_t mcp23018_status = 0x20;
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
// unused pins - D4, D5, D7, E6
// set as input with internal pull-ip enabled
DDRD &= ~(1<<5 | 1<<4);
DDRE &= ~(1<<6);
PORTD |= (1<<5 | 1<<4);
PORTE |= (1<<6);
frenchdev_blink_all_leds();
frenchdev_blink_all_leds();
frenchdev_blink_all_leds();
frenchdev_blink_all_leds();
matrix_init_user();
}
void frenchdev_blink_all_leds(void)
{
frenchdev_led_all_off();
frenchdev_led_all_set(LED_BRIGHTNESS_HI);
frenchdev_led_1_on();
_delay_ms(50);
frenchdev_led_2_on();
_delay_ms(50);
frenchdev_led_3_on();
_delay_ms(50);
frenchdev_led_1_off();
_delay_ms(50);
frenchdev_led_2_off();
_delay_ms(50);
frenchdev_led_3_off();
frenchdev_led_all_off();
}
uint8_t init_mcp23018(void) {
mcp23018_status = 0x20;
// I2C subsystem
// uint8_t sreg_prev;
// sreg_prev=SREG;
// cli();
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();
// SREG=sreg_prev;
return mcp23018_status;
}
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