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What PART Number for PDIP 40 PIN

 
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soulweed



Joined: 20 Oct 2006
Posts: 23

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What PART Number for PDIP 40 PIN
PostPosted: Mon Mar 05, 2007 6:45 pm     Reply with quote

PIC18* 40 PIN PDIP two UART ,please me
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Mar 05, 2007 7:33 pm     Reply with quote

1. Go to the parametric search page on the Microchip site for the PIC18:
http://www.microchip.com/ParamChartSearch/params.aspx?branchID=1004&mid=10&lang=en&pageId=74

2. Go about halfway down the page. Select these boxes:
Quote:
x 2 AUSART x 2 EUSART


3. Then go the bottom of the page and click the "Search" button.

4. When it finishes searching, click the "Detail" button.

5. Now you have a list of PICs. Scroll over to the right side
of the page. You can see the column for "Pin Count".

That will give you the answer.
future



Joined: 14 May 2004
Posts: 330

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PostPosted: Tue Mar 06, 2007 7:10 pm     Reply with quote

I remember these...

18F452
18F458
18F4520
18F4525
18F4620

The flash size increases downwards.
PCM programmer



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Posts: 21708

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PostPosted: Tue Mar 06, 2007 7:56 pm     Reply with quote

He wants two UARTs:
Quote:
PIC18* 40 PIN PDIP two UART ,please me
soulweed



Joined: 20 Oct 2006
Posts: 23

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PostPosted: Wed Mar 07, 2007 5:23 am     Reply with quote

I saw in microchip website ,any part Number is PDIP has two UART .I am so sorry.

however I fighting for my senior project

so i need to know about I get INT of my software UART because
I'm try to use MAX3100 ,it doesn't work.i don't know WHY ?

I think problem may be occurs HARDWARE more than Sofware because

when I coding I try to SIMMULATE in software and see Timing Diagram,
it correct.Then I think it ERROR By hardware.


Code:



#include <18f452.h>

#fuses XT,NOWDT,NOPROTECT,NOLVP
#use delay(clock=4000000)
#use rs232(baud=19200,xmit=PIN_C6,rcv=PIN_C7) 

#define MAX3100_CS     PIN_C0
#define MAX3100_IRQ    PIN_B0
#define MAX3100_CLK    PIN_C3
#define MAX3100_SDI    PIN_C2
#define MAX3100_SDO    PIN_C4

static unsigned char recv1;
static unsigned char recv2;
static unsigned char recv3;
static unsigned char recv4;
static unsigned char recv5;
static unsigned char recv6;
static unsigned char flagSPI;

/*   ##############   Main   ##################   */
unsigned char read_spi(unsigned char data);
void readMAX3100(unsigned char command,unsigned char data);
void spiputc(unsigned char data);

#INT_EXT
void interrupt_spi(void)
{
        output_low(MAX3100_CS);
       
        recv3 = read_spi(0x00);
        recv4 = read_spi(0x00);
       
       delay_us(1); 
        output_high(MAX3100_CS);
      output_low(MAX3100_CLK);
      output_low(MAX3100_SDI);
    //    output_low(MAX3100_IRQ);
      printf(spiputc,"%2X",recv4);
   //   printf("%2X\n\r",recv4);
      flagSPI = 0;
}

unsigned char read_spi(unsigned char data){
   unsigned char x;
   unsigned char temp;
   temp = 0;
   for(x=0;x<8;++x)
     {
      if(data & 0x80){
        output_high(MAX3100_SDI);
     }
      else{
        output_low(MAX3100_SDI);
     }
        output_low(MAX3100_CLK);
        delay_us(1);
        temp = ((temp <<1) | input(MAX3100_SDO));
        output_high(MAX3100_CLK);
        delay_us(1);

        data = data << 1;       

     }
   output_low(MAX3100_SDI);
   return(temp);
}


void spiputc(unsigned char data)
{
   unsigned int temp;

   readMAX3100(0x00,0x00);
    while((recv1!=0x40) & (recv1!=0xC0))
   {
      readMAX3100(0x00,0x00);
   }

   readMAX3100(0x80,data);

   readMAX3100(0x00,0x00);
   while((recv1==0x00))
   {
      readMAX3100(0x00,0x00);
   }
}


void readMAX3100(unsigned char command,unsigned char data)
{
        output_high(MAX3100_CS);
      output_low(MAX3100_CLK);
      output_low(MAX3100_SDI);
       delay_us(1); 
        output_low(MAX3100_CS);
       
        recv1 = read_spi(command);
        recv2 = read_spi(data);
       
       delay_us(1); 
        output_high(MAX3100_CS);
      output_low(MAX3100_CLK);
      output_low(MAX3100_SDI);
}

void main(void)
{


 unsigned  char  command,SPIcommand,temp1,temp2;
 unsigned int max3100Read; 

   output_high(MAX3100_CS);
   output_low(MAX3100_CLK);
   output_low(MAX3100_SDI);

    ext_int_edge( 0, H_TO_L);
     enable_interrupts(INT_EXT);
     enable_interrupts(GLOBAL);

      readMAX3100(0xC4,0x0A); //Write Config Command and set baud to 9600
     
for(;;){
     
      readMAX3100(0x00,0x00);
        while((recv1==0x00))
      {
         readMAX3100(0x00,0x00);
      }
      delay_ms(500);
    flagSPI = 0;

   printf(spiputc," TEST USART-SPI Max3100   \n\r");
 
      if(flagSPI==1)
      {
         flagSPI = 0;
      }
         
   }
 
 }

/*   ##############   END   ##################   */

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