| ??? 01/15/05 12:24 Read: times |
#85007 - Hardware Responding to: ???'s previous message |
Sorry, that i told with is no topic, but Im electronical engineer. Are you try, that supply in MAX 232 works corectly. It should get a +-10V on capacitors and RS-232 output of chip. Sometimes capacitor supply works bad, wrong polarization or bad capacitor. Just get any multimeter and take a voltage form. You cant change TTL side by puyying it down or up to 5 VDC. Second question is: Why do you initialising UART every time, you can do it only one times after chip is reseted. Last question is setup your terminal, it must be set correct to hardware i AT89C51. for example. 9600,N,8,1. |
| Topic | Author | Date |
| need help on serial communication | 01/01/70 00:00 | |
| Your setup | 01/01/70 00:00 | |
| simulator testing | 01/01/70 00:00 | |
| read eall about it | 01/01/70 00:00 | |
| Hardware | 01/01/70 00:00 | |
| Why the MAX232 | 01/01/70 00:00 | |
| Yes :) you right Steve. | 01/01/70 00:00 | |
| Handshaking? | 01/01/70 00:00 | |
| One step at a time | 01/01/70 00:00 | |
| setup correct? | 01/01/70 00:00 | |
| connector pinouts | 01/01/70 00:00 | |
| Schematic | 01/01/70 00:00 | |
| help again sorry | 01/01/70 00:00 | |
| easy | 01/01/70 00:00 | |
| Exclude trivial problems | 01/01/70 00:00 | |
| code for sending a character | 01/01/70 00:00 | |
loop back handshaking | 01/01/70 00:00 |