| ??? 01/26/09 08:02 Read: times |
#161737 - Layers Responding to: ???'s previous message |
Nes Yox said:
Let me clear my self. It is always best to do that in your first post - rather than having to clear-up confusion later! Remember: nobody reading your post knows anything at all about you or your project apart from what you clearly and explicitly state in your posts. Neil It's Andy, actually. I can see voltage on the datasheet. Good: that allows you to determine if the two units are electrically compatible; ie, if you can connect them together without blowing them up, and if each will be able to "see" the other's signals - or if you need some sort of interface circuit... I ask if the microcontroler can send 'asci' The microcontroller's UART (its "serial port") just sends & receives bytes; it neither knows nor cares anything about the meaning or significance of those bytes to your application - that is a matter for your application. Note that the term is ASCII - American Standard Code for Information Interchange. As the name suggests, it is just a Code - that is, a way for assigning the numerical values of bytes to represent characters; eg, In ASCII, the numerical value 0x30 represents the character '0' (zero). You can find a tables giving the full ASCII code here: http://www.asciitable.com/ so it can comunicate rs232 port RS232 is about electrical signal characteristics (voltages, impedances, slew rates) and mechanical connector details - it also neither knows nor cares anything about the meaning or significance of the data that may be exchanged over the circuits. or I must have max232 to convert the '0' '1'? The pins at the microcontroller will not be compatible with RS232 voltages - so, if you want to have an RS232 interface (eg, because your GSM unit has an RS232 interface), then you will have to add an RS232 Transceiver (a MAX232, or similar) Yes I know it is a sudent question. You should really be talking to your tutors about this - unlike people on internet forums, they do know you and your project. They also know your course - so they will be able to advise if you are getting distracted by unnecessary details. They will also be able to help you if you are falling behind with stuff that you should know at this stage of your course. Hopefully, there should also be less of a language barrier? I just new in the microcontroller buisnes. See above - student assignments are set on that basis that you are keeping up with the course expectations. |
| Topic | Author | Date |
| rs232 serial communication and microcontroller | 01/01/70 00:00 | |
| Cross-post | 01/01/70 00:00 | |
| GSM Module serial interface | 01/01/70 00:00 | |
| Not true | 01/01/70 00:00 | |
| Ive corected my post | 01/01/70 00:00 | |
| That's confusing! | 01/01/70 00:00 | |
| A case in point | 01/01/70 00:00 | |
| depends... | 01/01/70 00:00 | |
| more spesipic | 01/01/70 00:00 | |
| Set up matrix | 01/01/70 00:00 | |
| More info required! | 01/01/70 00:00 | |
| Layers | 01/01/70 00:00 | |
RS232 and Serial Communications | 01/01/70 00:00 | |
| Resistor is NOT an answer! | 01/01/70 00:00 |