I have an embedded board with a PCA9554 on it. It's an 8-bit IO expander similar to the PCF8574 in mainline. One difference is that when reading from the inputs, you have to do the following:
- start condition - send slave address, R/W=0 - send command (0x00 = read input register) - issue another start condition (!) - send slave address, R/W=1 - read data - stop condition Can such a protocol be handled by the i2c subsystem? Thanks, Hans _______________________________________________ i2c mailing list [email protected] http://lists.lm-sensors.org/mailman/listinfo/i2c
