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soulweed
Joined: 20 Oct 2006
Posts: 23
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| What PART Number for PDIP 40 PIN |
 Posted: Mon Mar 05, 2007 6:45 pm |
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| PIC18* 40 PIN PDIP two UART ,please me |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon Mar 05, 2007 7:33 pm |
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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. |
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future
Joined: 14 May 2004
Posts: 330
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| Posted: Tue Mar 06, 2007 7:10 pm |
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I remember these...
18F452
18F458
18F4520
18F4525
18F4620
The flash size increases downwards. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Mar 06, 2007 7:56 pm |
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He wants two UARTs:
| Quote: | | PIC18* 40 PIN PDIP two UART ,please me |
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soulweed
Joined: 20 Oct 2006
Posts: 23
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| Posted: Wed Mar 07, 2007 5:23 am |
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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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