Search found 16 matches

Thanks ALL for very helpful advices!

I have added ERROR option in my program, but still have got stuck. The transmiter side is out of my control, I can just received data stream, eg. 10 02 9D 03 45 ...

I have got a problem with getc() when I use RS3227 data output -----> RS232 data input.

It is often stuck on the third getc(), I check the manual, it wrote:

If a built-in USART is used the ha ...

I have tried in the following links:

keep the data link unchanged, add power from external power supply:

D9 PIN4 and PIN7 connect to +10V,
PIN5 is ground.

Still no data was captured (':evil' ...

I have a board, which outputs data with RS232 (MAX3227), the board get power out of PC RS232 port ( or from TD/RTS/DTR).

Now I want to work this board with PIC micro controller, need to supply powe ...

dbotkin, you are right. I check the RS232 boards of the both sides, found the board of sending RS232, which get power supply from PC D-9 cable (PIN 4: DTR, PIN7: RTS, 10V), but can not get power if I ...

The connect is:
unknow micro controller <-----> RS232 data output ------> RS232 (max232) <------> PIC18F452.

Today I did some experiments, the system was set up as follow:

RS232 data output ---> PC COM2, received data, then from COM1 ------> RS232 micro controller, all with data baud rate 57600.
It ...

I have tried other programs, like ex10 and ex11 (CCS gave example program), it works well. The RS232 can getc() receiving data from key hit.

Any suggestion how can I solve this problem?

I got su ...

Hi, I have got a problem:

From a RS232 output, the baud rate is 57600, I can read data from hyperterminal by PC, but had problem with PIC18F452 (XTL: 20MHz).

I code:

#use rs232 (baud=57600, p ...

Thanks all for very valuable advises!

I use 5V power supply, will save 8 bytes data, can anybody kindly send me your schematics?

Thanks a lot!
oliver

Hi, I need your instruction.

How can I save my data (just one float data) in flash memory (or eeprom) when power is suddenly down?

Thanks,
oliver

I have problem with rs232 for 4k data file from PC to PIC, need your helps!!!!!!!!!!

Thanks!

Oliver

Thanks, Neutone for your kindly suggestion!

My problem actually is: I don't know how to get the data file, which is saved in PC, into PIC (the data file is the code of MAX1463 hex file).

Oliver

I have MAX1463 and PIC18F452, the interface between them is SPI.

How can I programming MAX1463 through PIC18F452?

Need your knowlege and any suggestions urgent!

Thanks!

Oliver

Can anybody help me to find my code bug? I can not read any data by 3 wire SPI. Thanks!

unsigned long read_spi()
{
byte i;
unsigned long data16=0;

write_spi(0x0 ...