PIC/Torbens/barcode.c

#include <pic18.h>

#include "barcode.h"
#include "globals.h"

unsigned char barcode_length;
bit barcode_ready;

void barcode_init(void)
{
        SPEN = 0; //Make sure serial port is disabled
        
        // snupset fra  Kim H Pedersens serialmain.c 
        // Set Port C bit 6 output (TxD) and bit 7 input (RxD)
    TRISC6 = 0;
    TRISC7 = 1;

    SPBRG = 25;         //      x = Fosc/(16 * Baud Rate) - 1
                                        //      x = 4000000/(16 * 9600) - 1
                                        //      x = 25.0417 ~ 25
                                        //      Baud Rate = Fosc/(16 * (x+1))
                                        //      Baud Rate = 4000000/(16 * (25+1))
                                        //      Baud Rate = 9615
    TXSTA = 0x24;       //      TXSTA7 = 0      Don't care in asynchronous
                                        //      TXSTA6 = 0      8-bit transmission
                                        //      TXSTA5 = 1      Transmit enabled
                                        //      TXSTA4 = 0      Asynchronous mode
                                        //      TXSTA3 = 0      Unimplemented
                                        //      TXSTA2 = 1      High speed
                                        //      TXSTA1 = 0      TSR empty
                                        //      TXSTA0 = 0      9th bit                                         */
    RCSTA = 0x90;       //      RCSTA7 = 0      Serial port disabled
                                        //      RCSTA6 = 0      8-bit reception
                                        //      RCSTA5 = 0      Don't care in asynchronous
                                        //      RCSTA4 = 1      Receiver enabled
                                        //      RCSTA3 = 0      Don't care (8-bit operation)
                                        //      RCSTA2 = 0      No framing error
                                        //      RCSTA1 = 0      Overrun error bit
                                        //      RCSTA0 = 0      9th bit                                         */

        //config completed
        SPEN = 1; //Enable Serial port
        
        //Set module-scope variables
        barcode_length = 0;
        barcode_ready = 0;
        
        //Configure interrupts
        TXIE = 0; //Disable AUX TX interrupt - testes med TXIF;
        RCIE = 1; //Enable AUX Recieve interrupt - testes med RCIF;

        IPEN = 0; // IPEN=Interrupt Priority ENable bit - her bruges ingen prioritet
        
        PEIE = 1; // PEIE = PEriphal Interrupt Enable
                
        TXIF = 0; //nulstil intterupt flag
        RCIF = 0;

        GIE = 1; //Global interrupt enable bit

}

void barcode_reset(void)
{
        barcode_length = 0;
        barcode_ready = 0;
}

unsigned char barcode_is_ready(void)
{
        return barcode_ready;
}

unsigned char barcode_get_length()
{
        return barcode_length;
}

/* interrupt entry function - barcode is the only module using interrupts */
void interrupt barcode_interrupt(void)
{
        char data = RCREG;
        RCIF = 0;
        
        if (barcode_ready == 0)
        {
                if (data == '\r')
                {
                        return;
                }
                else if (data == '\n')
                {
                        barcode_ready = 1;
                }
                else
                {
                        global_barcode_buffer[barcode_length++] = RCREG;
                }
        }

        
        

}
1	torben	77	#include <pic18.h>
2
3			#include "barcode.h"
4			#include "globals.h"
5
6			unsigned char barcode_length;
7			bit barcode_ready;
8
9			void barcode_init(void)
10			{
11			SPEN = 0; //Make sure serial port is disabled
12
13			// snupset fra Kim H Pedersens serialmain.c
14			// Set Port C bit 6 output (TxD) and bit 7 input (RxD)
15			TRISC6 = 0;
16			TRISC7 = 1;
17
18			SPBRG = 25; // x = Fosc/(16 * Baud Rate) - 1
19			// x = 4000000/(16 * 9600) - 1
20			// x = 25.0417 ~ 25
21			// Baud Rate = Fosc/(16 * (x+1))
22			// Baud Rate = 4000000/(16 * (25+1))
23			// Baud Rate = 9615
24			TXSTA = 0x24; // TXSTA7 = 0 Don't care in asynchronous
25			// TXSTA6 = 0 8-bit transmission
26			// TXSTA5 = 1 Transmit enabled
27			// TXSTA4 = 0 Asynchronous mode
28			// TXSTA3 = 0 Unimplemented
29			// TXSTA2 = 1 High speed
30			// TXSTA1 = 0 TSR empty
31			// TXSTA0 = 0 9th bit */
32			RCSTA = 0x90; // RCSTA7 = 0 Serial port disabled
33			// RCSTA6 = 0 8-bit reception
34			// RCSTA5 = 0 Don't care in asynchronous
35			// RCSTA4 = 1 Receiver enabled
36			// RCSTA3 = 0 Don't care (8-bit operation)
37			// RCSTA2 = 0 No framing error
38			// RCSTA1 = 0 Overrun error bit
39			// RCSTA0 = 0 9th bit */
40
41			//config completed
42			SPEN = 1; //Enable Serial port
43
44			//Set module-scope variables
45			barcode_length = 0;
46			barcode_ready = 0;
47
48			//Configure interrupts
49			TXIE = 0; //Disable AUX TX interrupt - testes med TXIF;
50			RCIE = 1; //Enable AUX Recieve interrupt - testes med RCIF;
51
52			IPEN = 0; // IPEN=Interrupt Priority ENable bit - her bruges ingen prioritet
53
54			PEIE = 1; // PEIE = PEriphal Interrupt Enable
55
56			TXIF = 0; //nulstil intterupt flag
57			RCIF = 0;
58
59			GIE = 1; //Global interrupt enable bit
60
61			}
62
63			void barcode_reset(void)
64			{
65			barcode_length = 0;
66			barcode_ready = 0;
67			}
68
69			unsigned char barcode_is_ready(void)
70			{
71			return barcode_ready;
72			}
73
74			unsigned char barcode_get_length()
75			{
76			return barcode_length;
77			}
78
79			/* interrupt entry function - barcode is the only module using interrupts */
80			void interrupt barcode_interrupt(void)
81			{
82			char data = RCREG;
83			RCIF = 0;
84
85			if (barcode_ready == 0)
86			{
87			if (data == '\r')
88			{
89			return;
90			}
91			else if (data == '\n')
92			{
93			barcode_ready = 1;
94			}
95			else
96			{
97			global_barcode_buffer[barcode_length++] = RCREG;
98			}
99			}
100
101
102
103
104			}