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PRITEE NIKAM
Joined: 01 Oct 2013
Posts: 5
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| problem in 4*4 matrix keyboard interfacing with pic18f4550 |
 Posted: Tue Oct 01, 2013 4:50 am |
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| Code: | #include "ex_usb_common.h"
#FUSES NOWDT //No Watch Dog Timer
#FUSES WDT128 //Watch Dog Timer uses 1:128 Postscale
#FUSES HS //High speed Osc (> 4mhz for PCM/PCH) (>10mhz for PCD)
#FUSES NOPROTECT //Code not protected from reading
#FUSES NOBROWNOUT //No brownout reset
#FUSES BORV20 //Brownout reset at 2.0V
#FUSES NOPUT //No Power Up Timer
#FUSES NOCPD //No EE protection
#FUSES STVREN //Stack full/underflow will cause reset
#FUSES NODEBUG //No Debug mode for ICD
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOWRT //Program memory not write protected
#FUSES NOWRTD //Data EEPROM not write protected
#FUSES IESO //Internal External Switch Over mode enabled
#FUSES FCMEN //Fail-safe clock monitor enabled
#FUSES PBADEN //PORTB pins are configured as analog input channels on RESET
#FUSES NOWRTC //configuration not registers write protected
#FUSES NOWRTB //Boot block not write protected
#FUSES NOEBTR //Memory not protected from table reads
#FUSES NOEBTRB //Boot block not protected from table reads
#FUSES NOCPB //No Boot Block code protection
#FUSES LPT1OSC //Timer1 configured for low-power operation
#FUSES MCLR //Master Clear pin enabled
#FUSES NOXINST //Extended set extension and Indexed Addressing mode disabled (Legacy mode)
///////////////////////////////////////////////////////////////////////////////
//#use delay(clock=20000000)
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)//RS232
///////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
#if __USB_PIC_PERIF__
#if defined(__PCM__)
#include <pic_usb.h> //Microchip PIC16C765 hardware layer for usb.c
#elif defined(__PCH__)
#include <pic18_usb.h> //Microchip PIC18Fxx5x hardware layer for usb.c
#elif defined(__PCD__)
#include <pic24_usb.h> //Microchip PIC18Fxx5x hardware layer for usb.c
#endif
#else
#include <usbn960x.h> //National 960x hardware layer for usb.c
#endif
#include "usb_desc_keyboard.h" //USB Configuration and Device descriptors for this UBS device
#include "usb.c" //handles usb setup tokens and get descriptor reports
///////////////////////////////////////////////////
#define row1_low output_low(PIN_B0)//ROWS
#define row1_high output_high(PIN_B0)//ROWS
#define row2_low output_low(PIN_B1)
#define row2_high output_high(PIN_B1)
#define row3_high output_high(PIN_B2)
#define row3_low output_low(PIN_B2)
#define row4_high output_high(PIN_B3)
#define row4_low output_low(PIN_B3)
#define read_col1 input(PIN_B4) // COLUMN
#define read_col2 input(PIN_B5)
#define read_col3 input(PIN_B6)
#define read_col4 input(PIN_B7)
int8 value;
int8 key;
char key_value;
void read_key1(void);
void read_key2(void);
void read_key3(void);
void read_key4(void);
void usb_keyboard_task(void);
void usb_debug_task(void)
{
static int8 last_connected;
static int8 last_enumerated;
int8 new_connected;
int8 new_enumerated;
new_connected=usb_attached();
new_enumerated=usb_enumerated();
if (new_connected)
LED_ON(LED2);
else
LED_OFF(LED2);
if (new_enumerated)
LED_ON(LED3);
else
LED_OFF(LED3);
if (new_connected && !last_connected)
printf("\r\n\nUSB connected, waiting for enumaration...");
if (!new_connected && last_connected)
printf("\r\n\nUSB disconnected, waiting for connection...");
if (new_enumerated && !last_enumerated)
printf("\r\n\nUSB enumerated by PC/HOST");
if (!new_enumerated && last_enumerated)
printf("\r\n\nUSB unenumerated by PC/HOST, waiting for enumeration...");
last_connected=new_connected;
last_enumerated=new_enumerated;
}
///////////////////////////////////////////////////
void main()
{
key=0;
key_value=0;
printf("\r\n welcome");
HW_INIT();
// LED_ON(LED1);
// LED_OFF(LED2);
// LED_OFF(LED3);
printf("\r\n\nCCS HID Keyboard Demo");
printf("\r\nCharacters received over serial get sent as a HID keyboard");
#ifdef __PCH__
printf("\r\nPCH: v");
printf(__PCH__);
#elif defined(__PCD__)
printf("\r\nPCD: v");
printf(__PCD__);
#else
printf("\r\nPCM: v");
printf(__PCM__);
#endif
usb_init_cs();
#if !(__USB_PIC_PERIF__)
printf("\r\nUSBN: 0x%X", usbn_get_version());
#endif
printf("\r\n");
while(1)
{
unsigned int8 tx_msg[7];
usb_task();
usb_debug_task();
delay_ms(20);
if (usb_enumerated())
{
if (usb_tbe(1))
{
read_key1();
memset(tx_msg, 0x00, sizeof(tx_msg));
tx_msg[2] = key_value;
}
usb_put_packet(1, tx_msg, sizeof(tx_msg), USB_DTS_TOGGLE);
}
key_value = 0;
}
}
//-------------------------- READ MUX KEY PAD ----------------------------------
void read_key1(void)
{
row1_high;
row2_high;
row3_high;
row4_high;
/////////////////////
row1_low;
row2_high;
row3_high;
row4_high;
delay_ms(5);
key=input_b();
key=(key & 0xF0);
if(key==0xE0)
{
key_value=0x09;
output_low(PIN_C1);
goto exit_key;
}
if(key==0xD0)
{
key_value=0x05;
goto exit_key;
}
if(key==0xB0)
{
key_value=0x24;
goto exit_key;
}
if(key==0x70)
{
key_value=0x20;
goto exit_key;
} [/b]
row1_high;
row2_low;
row3_high;
row4_high;
delay_ms(5);
key=input_b();
key=(key & 0xF0);
if(key==0xE0)
{
key_value=0x08;
goto exit_key;
}
if(key==0xD0)
{
key_value=0x04;
goto exit_key;
}
if(key==0xB0)
{
key_value=0x23;
goto exit_key;
}
if(key==0x70)
{
key_value=0x1F;
goto exit_key;
}
row1_high;
row2_high;
row3_low;
row4_high;
delay_ms(5);
key=input_b();
key=(key & 0xF0);
if(key==0xE0)
{
key_value=0x07;
goto exit_key;
}
if(key==0xD0)
{
key_value=0x26;
goto exit_key;
}
if(key==0xB0)
{
key_value=0x22;
goto exit_key;
}
if(key==0x70)
{
key_value=0x1E;
goto exit_key;
}
row1_high;
row2_high;
row3_high;
row4_low;
delay_ms(5);
key=input_b();
key=(key & 0xF0);
if(key==0xE0)
{
key_value=0x06;
goto exit_key;
}
if(key==0xD0)
{
key_value=0x25;
goto exit_key;
}
if(key==0xB0)
{
key_value=0x21;
goto exit_key;
}
if(key==0x70)
{
key_value=0x27;
goto exit_key;
}
exit_key:;
delay_ms(20);
} |
This is my 4*4 matrix keypad code. I want USB output. This code is partially working. First row is not working.
If i run same code for rs232 output by changing only display function its working properly. But same code when i integrate for USB then its creating problem.
please help me...
thnx |
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temtronic
Joined: 01 Jul 2010
Posts: 9163
Location: Greensville,Ontario
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| Posted: Tue Oct 01, 2013 5:29 am |
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debugging101...
Since you say the KPD code works using RS-232 then hardware and KPD driver should be OK.
Since row1 doesn't work, look for something 'common' or used by both KPD row1 code and the USB drivers.
I suspect the USB code test LEDs( LED2, LED3). One might be connected to B0. I can't check the code( on wrong computer), but that's the first place I'd look.
hth
jay |
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PRITEE NIKAM
Joined: 01 Oct 2013
Posts: 5
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| Posted: Tue Oct 01, 2013 9:55 pm |
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I have checked all port pins but here I'm facing different problem..
when i write routine for row1 first in main program, row1 is not working. If i interchange other row routine (row2 or row3 or row4) with row1 then that particular row is not working...
I guess there is problem in my usb code but I'm not getting it exactly... |
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PRITEE NIKAM
Joined: 01 Oct 2013
Posts: 5
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| Posted: Wed Oct 02, 2013 1:44 am |
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in this code i want to send 3 key_values(hid codes) at one keypress..
eg.- if i press one key it should send hid code of a,b,c (0x04,0x05,0x06)
how can i send???
please help me
i need it urgently. |
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