diff options
author | Alex Ong <the.onga@gmail.com> | 2019-01-26 11:36:28 +1100 |
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committer | Alex Ong <the.onga@gmail.com> | 2019-01-26 11:36:28 +1100 |
commit | d977daa8dc9136746425f9e1414e1f93cb161877 (patch) | |
tree | 209ab8082580e5fdf37f1a8b7c1169250b7548c0 /keyboards/gergo/gergo.c | |
parent | 47c91fc7f75ae0a477e55b687aa0fc30da0a283c (diff) | |
parent | 0306e487e2cd6a77ad840d0a441b478747b7ccd0 (diff) |
Merge branch 'master' of https://github.com/qmk/qmk_firmware
Diffstat (limited to 'keyboards/gergo/gergo.c')
-rw-r--r-- | keyboards/gergo/gergo.c | 66 |
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; +} |