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Recent content by chandra

  1. C

    Three phase ac to dc motor speed control with pic processor.

    I think PWM will do.So any circuit or link?
  2. C

    Three phase ac to dc motor speed control with pic processor.

    hI, I am using a 3Hp DC motor at 3 phase AC electic with 6 numbers of Thyristors.Now I need a speed control circuit and protection circuit with a Micro.Anybody have a idea or Net Can I find a similar circuit?
  3. C

    PIC12F629 Hello world program

    Dear, Anybody have the Hello world program for PIC12F629.I need to use external OSC 16Mhz and 115200 budrate.
  4. C

    Need help to finding the equation

    Dear, I am always get the same output for an input. Thanks.
  5. C

    Need help to finding the equation

    It is a reply from a microprossor chip.when I send the hex 00 it gives the reply F9. If I send the hex 01 it reply 9D.Same like the other numbers.I want to know the exact proces between the numbers.
  6. C

    Need help to finding the equation

    All the numbers are hex.These are the answers: 00=F9, 01=9D, 02=90, 03=7C, 04=7D, 05=7E, 06=C2, 07=91, 08=92, 09=93, 0A=94, 0B=9A, 0C=7F, 0D=9B, 0E=C0, 0F=C1. 10=46, 11=47, 12=A5, 13=72, 14=75, 15=E0, 16=FA, 17=A6, 18=A7, 19=A3, 1A=A4, 1B=AA, 1C=EB, 1D=AB, 1E=C8, 1F=C9. 20=63, Anybody can...
  7. C

    STI5518 Firmware modification

    I read the firmware by jtag from a working STB with STI5518 chip.I want to add a Uart protocal at the firmware. The protocal is as follows: int SSSP_DoCommand07(void) { char szFront[16]; unsigned char ucaReply[32]; unsigned short wLen; int i, j, k, nErrorCnt; DWORD dwWriteSize, dwReadSize...
  8. C

    Hex string checksum calculation

    I understand.Yes it is perfect with 3F.Thanks a lot.
  9. C

    Hex string checksum calculation

    Thanks for reply. From where you get the 3F.
  10. C

    Hex string checksum calculation

    17 FE B3 50 02 B1 DE A8 0D E9 B6 D1 73 17 70 B3 50 02 B8 DE BB 0D CA B6 57 42 Both lines are Hex strings.The last two bytes are checksum values.Anybody can tell me the method how to calculate for that value. Thanks
  11. C

    PIC24HJ UART TX communication problem

    PIC24HJ UART TX problem I am using 24hj128gp306 and want to establish connection with PC terminal programm at 115200bps.PIC24HJ I am using UART2. But i am not getting any characters at pc.Anybody can check the code and help me. #include <p24Hxxxx.h> #include<libpic30.h> #include<uart.h>...
  12. C

    Need the equation - anybody can solve this?

    Need the equation Anybody can solve the equates: These are the two hex strings in and out.If I am send 000000000000 I am receiving F988F909F902F911F99BF9182E. 000000000000 ---F988F909F902F911F99BF9182E 010000000000 ---9D89F909F902F911F99BF9184B 020000000000...
  13. C

    PIC24HJ with ENC28j60 Ethernet to rs232 adapter

    enc28j60 rs232 I am trying to modyfy the microchip 24HJ bootloader.I have some doughts. The CPU can run only FCY at 80mhz. Or low 73728050hz. Anybody can help? Thanks.
  14. C

    PIC24HJ with ENC28j60 Ethernet to rs232 adapter

    pic24hj I connected the Pic24HJ128gp306 with ENC28J60. ENC28J60 PIC24HJ --------- --------- 1.CS ------- RB15 2.SDO ------- SDI [RF2] 3.SDI ------- SDO [RF3] 4.SCK ------- SCK1 [RF6] 5.INT ------- RD9 6.RST ------- RD8 Also I am using a MAX3232 chip for RS232 and connected the TX,RX...
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