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Recent content by kemalkemal

  1. K

    How to assign bit values at once to different port pins of different I/O ports?

    I don't aim a parallel work. I have microchips explorer16/32 development board. And 8 LED's on that board are driven from different ports. (4 of them are from PORTA, 3 from PORTB and one is from PORTC) As i sad in my first post i try to send an ON-OFF command to all those LEDs at once. But after...
  2. K

    How to assign bit values at once to different port pins of different I/O ports?

    thanks for reply. i tried something similar but it didn't work. I dream something like that; when i give a value to myPortB, myBportB would distribute/place all its bit values to appropriate port pins. This results an error of main.c:49:13: error: incompatible types when assigning to type...
  3. K

    How to assign bit values at once to different port pins of different I/O ports?

    how to assign bit values at once to different port pins of different I/O port through a register which I define as comprised of those port pins of I/O ports? I want to define a variable(name=my_reg) of uint8_t type which i plan to use it as a register of 8 bits. Each bit of this register...
  4. K

    [SOLVED] Voltage Follower For Max232 output

    Thanx FvM for the reply. But TX pin; the one in the middle so it is unlikely to fool. But i checked it again: T1OUT of max232 (pin14) ---> to the noninverting input of opamp. And output of opamp(also shorted to inverting input) --->to the 3rd pin(TX) of the DB9 connector. Besides the same...
  5. K

    [SOLVED] Voltage Follower For Max232 output

    It seems LT1112 is giving the best result but not enough. There must be something i am missing or doing wrong.
  6. K

    [SOLVED] Voltage Follower For Max232 output

    Hi all. As you can see from the circuit schematic i try to send some data from PIC to PC(serial USB converter). I used a max232. When i made the connection i saw that PIC-UART signal levels attenuate. So i decided to use a voltage follower after max 232 before serial-USB converter. Although i...
  7. K

    [SOLVED] PIC18f and RealTerm UART problem

    Thanks Brian, level converter idea solved my problem. I changed USB-serial port converter. But it is interesting what i found out. This is the brown converter that i used in the unsuccessful trials.(I paid lots of money to this) **broken link removed** This is the negative signal level when i...
  8. K

    [SOLVED] PIC18f and RealTerm UART problem

    Hi all, I am using PIC18f24K22, mpasm, real term and a 3rd party development board. My problem is; i can send data via uart-tx but i couldn't receive it from the opponent side. My code is just an infinite loop (for debug) that is sending some binary data continously. Interesting thing is i can...
  9. K

    UART-SPI interface Problem

    Hi. Thanks for the answers. I will elaborate my problem with hardware and software details as soon as possible. But in the last working hour of day i found out that one of my RS232-TTL converters may not working properly. This is the scheme i use for USB-RS232-TTL conversion. I need to be...
  10. K

    UART-SPI interface Problem

    Hi; I am using MPLABX, PIC18f2520 and assembler. I have 2 PIC182520 talking to each other with SPI. Master PIC gets data from UART module. Then transmit the same data through SPI module to Slave PIC. Slave PIC gets that data and then transmit it through UART. Initially instead of sensor I use...
  11. K

    [SOLVED] How to implement a string command syntax with PIC assembly

    It worked. You are a life saver KlausST :) Thanx. ( One note if someone interested; After i change "\r" and "\n" with the right codes , I reversed the order of sent bytes because program accepts little endian data. Final and correct core : MOVLW 0x0A ;\n MOVWF data_h CALL P18_usart_send...
  12. K

    [SOLVED] How to implement a string command syntax with PIC assembly

    Hi, Fırst of all I am using PIC18f4520 , MPLABX and assembler. I want to use a serial port data plotter which I downloaded from Microchips site named "PIC Data Plotter". **broken link removed** According to PIC Data Plotters user guide to configure the program and then to send data which is to...
  13. K

    how stretch out the signal band

    thanx Klaus
  14. K

    how stretch out the signal band

    Hi all, I need to strech out a signal band starts from 1,9 volts comes to the middle point at 2,4 volts and ends at 3,0 volts. After the stretching process new band should appear like that: start at 0 volts (middle point 2,4 volts) and ends at 5,0 volts. (I can add a negative 1,9 volts and...
  15. K

    Measuring a transformer with an oscilloscope

    Hi Klaus, thanx for the answer. In the begining, method 1 was also the usual way to me . But as i stated the resultant waveform was crazy. I checked after your message my transformer; secondary side is totaly isolated (no connection to earth). So the mystery perseveres :smile:
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