1 files changed, 85 insertions, 0 deletions
diff --git a/keyboards/ergodox/ez/ez.c b/keyboards/ergodox/ez/ez.c
new file mode 100644
index 000000000..e7afc9859
--- /dev/null
+++ b/keyboards/ergodox/ez/ez.c
@@ -0,0 +1,85 @@
+#include "ez.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
+
+    // (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();
+
+    matrix_init_user();
+}
+
+void ergodox_blink_all_leds(void)
+{
+    ergodox_led_all_off();
+    ergodox_led_all_set(LED_BRIGHTNESS_HI);
+    ergodox_right_led_1_on();
+    _delay_ms(50);
+    ergodox_right_led_2_on();
+    _delay_ms(50);
+    ergodox_right_led_3_on();
+    _delay_ms(50);
+    ergodox_right_led_1_off();
+    _delay_ms(50);
+    ergodox_right_led_2_off();
+    _delay_ms(50);
+    ergodox_right_led_3_off();
+    //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();
+
+    return mcp23018_status;
+}
+
+