return 0;
} else {
uint8_t data = 0;
- mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
- mcp23018_status = i2c_write(GPIOB); if (mcp23018_status) goto out;
- mcp23018_status = i2c_start(I2C_ADDR_READ); if (mcp23018_status) goto out;
- data = i2c_read_nack();
- data = ~data;
+ mcp23018_status = i2c_start(I2C_ADDR_WRITE, 0); if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(GPIOB, 0); if (mcp23018_status) goto out;
+ mcp23018_status = i2c_start(I2C_ADDR_READ, 0); if (mcp23018_status) goto out;
+ mcp23018_status = i2c_read_nack(0); if (mcp23018_status < 0) goto out;
+ data = ~((uint8_t)mcp23018_status);
out:
- i2c_stop();
+ i2c_stop(0);
return data;
}
} else {
} else {
// set active row low : 0
// set other rows hi-Z : 1
- mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
- mcp23018_status = i2c_write(GPIOA); if (mcp23018_status) goto out;
- mcp23018_status = i2c_write(0xFF & ~(1<<row)); if (mcp23018_status) goto out;
+ mcp23018_status = i2c_start(I2C_ADDR_WRITE, 0); if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(GPIOA, 0); if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(0xFF & ~(1<<row), 0); if (mcp23018_status) goto out;
out:
- i2c_stop();
+ i2c_stop(0);
}
} else {
// select on teensy