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