??? 09/04/06 06:26 Read: times |
#123618 - Hardware interface Responding to: ???'s previous message |
Philip, there is nothing intrinsically wrong with the hardware interface you suggested - many have done it much the same way. You can get it down to one octal register (74hc574) if you use 4 bit mode and write only. Actually you only need 6 bits - D0..3, EN, RS and r/*w is tied to 0v. Since you don't poll the ready bit, you use fixed delays.
I've also used an i2c interface for the lcds - but I find the philips 8574 chip is probably more expensive than a small micro or going to a larger micro with more i/o. Nevertheless, it forms a very simple interface. |
Topic | Author | Date |
LCD hardware interface | 01/01/70 00:00 | |
2 wire LCD interface schematic, pcb, software | 01/01/70 00:00 | |
Look at I2C | 01/01/70 00:00 | |
Look at I2C | 01/01/70 00:00 | |
Hardware interface | 01/01/70 00:00 | |
Workable? | 01/01/70 00:00 | |
Workable?![]() | 01/01/70 00:00 |