diff options
Diffstat (limited to 'keyboard/ergodox_ez/ergodox_ez.c')
| -rw-r--r-- | keyboard/ergodox_ez/ergodox_ez.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/keyboard/ergodox_ez/ergodox_ez.c b/keyboard/ergodox_ez/ergodox_ez.c new file mode 100644 index 0000000000..f7e156b319 --- /dev/null +++ b/keyboard/ergodox_ez/ergodox_ez.c @@ -0,0 +1,123 @@ +#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; +} + |