| ??? 07/21/08 10:10 Modified: 07/21/08 10:13 Read: times |
#156881 - NEW - Receiver Promlems Responding to: ???'s previous message |
So now I'm having problems with my receiver.
I've tried like 5 different ways of receiving data but it looks like I'm getting the wrong data in SBUF and it receives like 1-2 packets out of 40. I used an osciloscope to see if the packets are sent, and it looks fine. no noises and such. I tried putting the 2 processors on a matrice to check them with a simple program and it works, so I guess it has something to do with the bigger program. This is a LED Matrice project (with scanning) so the extra stuff is related to it. It would be very helpful if someone could comment and maybe find what I'm doing wrong
#include <reg52.h>
#include <intrins.h>
// prototypes
char set_font(unsigned int row, unsigned int letter);
///char pow(char num, char pow);
//bit is_effect(char DATA);
sbit CLK_COL = P3^1;
sbit ROW0 = P1^0;
sbit ROW1 = P1^1;
sbit ROW2 = P1^2;
sbit ROW3 = P1^3;
sbit OE_ROW = P1^4;
sbit OE_COL = P1^5;
sbit OE_COL_D = P3^4;
sbit LE = P1^6;
sbit SER = P1^7;
// global variables
//xdata char my_string[] = {6,4,14,17,6,4,36,17,20,1,8,13,36,14,22,13,25,36,24,14,20,17,36,0,18,18,36,36,36,36};
//xdata char str_len=30;
xdata char output[7][48] = {{0}};
xdata unsigned char my_string[] = {22,4,11,2,14,12,4,36,36,36,36};
xdata unsigned char str_len=11,border;
xdata char timer0_c=0;
xdata unsigned char tmp_sbuf=0;
bit shift_flag=0,data_ready=0,clean_flag=0;
char set_font(unsigned int row, unsigned int letter)
// returns wanted code for font according to wanted row
{
const unsigned char code font[][37] = {
/* 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
/* A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9 spc */
{0x1c,0x3c,0x1c,0x3c,0x3c,0x3e,0x1c,0x22,0x1c,0x02,0x22,0x20,0x22,0x22,0x1c,0x3c,0x1c,0x3c,0x1c,0x3e,0x22,0x22,0x22,0x22,0x22,0x3e,0x3e,0x08,0x3e,0x3e,0x22,0x3e,0x3e,0x3e,0x3e,0x3e,0x00},
{0x22,0x22,0x22,0x22,0x20,0x20,0x22,0x22,0x08,0x02,0x24,0x20,0x36,0x22,0x22,0x22,0x22,0x22,0x22,0x08,0x22,0x22,0x22,0x22,0x22,0x02,0x22,0x18,0x02,0x02,0x22,0x20,0x20,0x02,0x22,0x22,0x00},
{0x22,0x22,0x20,0x22,0x20,0x20,0x20,0x22,0x08,0x02,0x28,0x20,0x2a,0x32,0x22,0x22,0x22,0x22,0x20,0x08,0x22,0x22,0x22,0x14,0x22,0x04,0x22,0x08,0x02,0x02,0x22,0x20,0x20,0x02,0x22,0x22,0x00},
{0x22,0x3c,0x20,0x22,0x3c,0x3c,0x20,0x3e,0x08,0x02,0x30,0x20,0x22,0x2a,0x22,0x22,0x22,0x22,0x1c,0x08,0x22,0x22,0x22,0x08,0x14,0x08,0x22,0x08,0x3e,0x3e,0x3e,0x3e,0x3e,0x04,0x3e,0x3e,0x00},
{0x3e,0x22,0x20,0x22,0x20,0x20,0x2e,0x22,0x08,0x22,0x28,0x20,0x22,0x26,0x22,0x3c,0x2a,0x3c,0x02,0x08,0x22,0x22,0x2a,0x14,0x08,0x10,0x22,0x08,0x20,0x02,0x02,0x02,0x22,0x08,0x22,0x02,0x00},
{0x22,0x22,0x22,0x22,0x20,0x20,0x22,0x22,0x08,0x22,0x24,0x20,0x22,0x22,0x22,0x20,0x26,0x22,0x22,0x08,0x22,0x14,0x36,0x22,0x08,0x20,0x22,0x08,0x20,0x02,0x02,0x02,0x22,0x08,0x22,0x02,0x00},
{0x22,0x3c,0x1c,0x3c,0x3c,0x20,0x1c,0x22,0x1c,0x1c,0x22,0x3c,0x22,0x22,0x1c,0x20,0x1e,0x22,0x1c,0x08,0x1c,0x08,0x22,0x22,0x08,0x3e,0x3e,0x08,0x3e,0x3e,0x02,0x3e,0x3e,0x08,0x3e,0x3e,0x00}
};
if(row<7) return font[row][letter];
else return 0;
}
void SER_ISR() interrupt 4
{
if(RI)
{
RI = 0;
my_string[str_len++] = SBUF;
}
}
void INT0_ISR() interrupt 0
{
SCON = 0x50; // Mode 1, No Parity, Receive Enable
TMOD &= 0x0F;
TMOD |= 0x20; // T1 Mode 2 (auto reload - baud gen).
TH1 = -52; // 1200 baud rate
TR1 = 1;
IE &= 0xef;
IE |= 0x10; // Enable SER ISR
str_len = 0;
data_ready = 1;
}
void timer0_ISR() interrupt 1
{
TH0 = ~(50000/256);
TL0 = -(50000%256);
if(timer0_c<=2)
{
timer0_c++;
}
else
{
timer0_c = 0;
shift_flag = 1;
}
}
void main(void)
{
xdata char carry[48]={0};
xdata char i=0,j,cor_order,tmp,cur_row=5;
border = (str_len>=4) ? str_len : 4;
IE = 0x83; // Timer 0 (rotation). INT0 (serial transmission)
IT0 = 1; // Using FF
SCON = 0x50; // Mode 1, No Parity, Receive Enable
TMOD = 0x21; // T0 Mode 1 (rotate counter). T1 Mode 2 (baud rate generator)
TH1 = -52; // 1200 baud rate
TR1 = 1;
T2CON = 0x01; // T2 Capture Mode
TH0 = ~(50000/256);
TL0 = -(50000%256);
TR0 = 1;
// populate output(array) with font data
for(i=0; i<7; i++)
for(j=str_len-1,cor_order=0; j>=0; j--,cor_order++)
output[i][cor_order] = set_font(i,my_string[j]);
while(1)
{
if(data_ready)
{
data_ready = 0;
if(my_string[str_len--] == 0xaa)
{
str_len-=2;
// Fill font array with new data
for(i=0; i<7; i++)
for(j=str_len-1,cor_order=0; j>=0; j--,cor_order++)
output[i][cor_order] = set_font(i,my_string[j]);
border = (str_len>=4) ? str_len : 4; // Set new borders
//IE &= 0xef; // Disable SER ISR
clean_flag = 0;
}
}
// RESET BEFORE SHOW
LE = 0;
OE_COL_D = 0;
OE_COL = 1;
OE_ROW = 1;
ROW0=cur_row%2;
ROW1=(cur_row>>1)%2;
ROW2=(cur_row>>2)%2;
ROW3=(cur_row>>3)%2;
// shift data left when needed
if(shift_flag)
{
// i = index, j = row
for(j=0; j<7; j++)
{
// save msb
for(i=0; i<border; i++)
carry[i] = _crol_ (output[j][i]&0x80,1);
// shift
for(i=0; i<border; i++)
output[j][i] = output[j][i]<<1;
// get msb(new lsb) from next cell
for(i=0; i<border; i++)
{
if(i==0) output[j][0] += carry[border-1];
else output[j][i] += carry[i-1];
}
}
shift_flag = 0;
}
// output fonts to SER
for(j=0; j<4; j++)
{
tmp = ~output[cur_row-5][j];
for(i=0; i<8; i++)
{
SER = tmp%2;
tmp=tmp>>1;
CLK_COL = 1;
CLK_COL = 0;
}
}
LE = 1;
OE_COL_D = 1;
OE_COL = 0;
OE_ROW = 0;
if(cur_row==11) cur_row=5;
else cur_row++;
TH2 = ~(500/256);
TL2 = -(500%256);
TR2=1;
while(!TF2);
TR2=0;
TF2=0;
}
}
It should work in the following way: 1) I receive an INT0 when a new batch of packets is coming (text) 2) in the INT0 ISR I set all necessary registers for serial commmunication 3) I receive data 4) When finished receiving data I process it (in main program) Thanks in advance.. |
