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-rw-r--r--keyboards/gergo/gergo.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/keyboards/gergo/gergo.c b/keyboards/gergo/gergo.c
new file mode 100644
index 0000000000..c6ba91bb28
--- /dev/null
+++ b/keyboards/gergo/gergo.c
@@ -0,0 +1,66 @@
+#include QMK_KEYBOARD_H
+
+bool i2c_initialized = 0;
+i2c_status_t mcp23018_status = 0x20;
+
+void matrix_init_kb(void) {
+ // (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-up enabled
+ DDRC &= ~(1<<7);
+ DDRD &= ~(1<<5 | 1<<4 | 1<<6 | 1<<7);
+ DDRE &= ~(1<<6);
+ PORTC |= (1<<7);
+ PORTD |= (1<<5 | 1<<4 | 1<<6 | 1<<7);
+ PORTE |= (1<<6);
+
+ matrix_init_user();
+}
+
+
+uint8_t init_mcp23018(void) {
+ print("starting init");
+ 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 = true;
+ _delay_ms(1000);
+ }
+ // i2c_init(); // on pins D(1,0)
+ // _delay_ms(1000);
+
+ // set pin direction
+ // - unused : input : 1
+ // - input : input : 1
+ // - driving : output : 0
+ mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(IODIRA, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(0b10000000, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(0b11111111, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
+ i2c_stop(ERGODOX_EZ_I2C_TIMEOUT);
+
+ // set pull-up
+ // - unused : on : 1
+ // - input : on : 1
+ // - driving : off : 0
+ mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(GPPUA, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(0b10000000, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(0b11111111, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
+
+out:
+ i2c_stop(ERGODOX_EZ_I2C_TIMEOUT);
+ // SREG=sreg_prev;
+ //uprintf("Init %x\n", mcp23018_status);
+ return mcp23018_status;
+}