RGB LED MAX7219 PIC18F4550

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user.c Source code

The following code is the custom code for translating the data from the Universal Serial Bus (USB) to SPI for MAX7219.
It is derived from the Demo02 Code given by Microchip. Compiler : C18
MPLAB v8

user/user.c 
/** I N C L U D E S **********************************************************/
#include <p18cxxx.h>
#include <usart.h>

#include <delays.h>

#include "system\typedefs.h"

#include "system\usb\usb.h"

#include "io_cfg.h"             // I/O pin mapping
#include "user\user.h"
#include <spi.h>

/** V A R I A B L E S ********************************************************/
#pragma udata

byte counter;
byte trf_state;

DATA_PACKET dataPacket;

/** P R I V A T E  P R O T O T Y P E S ***************************************/

void BlinkUSBStatus(void);
void ServiceRequests(void);
void InitMAX7219(void);
void SendRaw7219Packet(void);
void OutSerialData(void);
/** D E C L A R A T I O N S **************************************************/
#pragma code
void UserInit(void)
{
    mInitAllLEDs();
	InitMAX7219();
}//end UserInit


/******************************************************************************
 * Function:        void ProcessIO(void)
 *
 * PreCondition:    None
 *
 * Input:           None
 *
 * Output:          None
 *
 * Side Effects:    None
 *
 * Overview:        This function is a place holder for other user routines.
 *                  It is a mixture of both USB and non-USB tasks.
 *
 * Note:            None
 *****************************************************************************/
void ProcessIO(void)
{   
    BlinkUSBStatus();
    // User Application USB tasks
    if((usb_device_state < CONFIGURED_STATE)||(UCONbits.SUSPND==1)) return;
    
    ServiceRequests();

}//end ProcessIO


void ServiceRequests(void)
{
    byte index;
    
    if(USBGenRead((byte*)&dataPacket,sizeof(dataPacket)))
    {
        counter = 0;
        switch(dataPacket.CMD)
        {
            case READ_VERSION:
                //dataPacket._byte[1] is len
                dataPacket._byte[2] = MINOR_VERSION;
                dataPacket._byte[3] = MAJOR_VERSION;
                counter=0x04;
                break;
			case RAW_MAX_PACKET://RAW_MAX_PACKET
				SendRaw7219Packet();
				dataPacket._byte[2] = ~dataPacket._byte[2];
				dataPacket._byte[3] = ~dataPacket._byte[3];
				counter=0x06;
                break;
			case OUT_SERIAL_DATA:
				OutSerialData();
				LOAD7219 = 1;
				dataPacket._byte[1]=0x02;
				dataPacket._byte[2]=dataPacket._byte[0];
				counter=0x03;
				break;
			case PULSE_LOAD:
				LOAD7219 = 1;
				break;
            case RESET:
                Reset();
                break;
                
            default:
                break;
        }//end switch()
        if(counter != 0)
        {
            if(!mUSBGenTxIsBusy())
                USBGenWrite((byte*)&dataPacket,counter);
        }//end if
    }//end if

}//end ServiceRequests

/******************************************************************************
 * Function:        void InitMAX7219(void)
 *
 * PreCondition:    None
 *
 * Input:           None
 *
 * Output:          None
 *
 * Side Effects:    None
 *
 * Overview:        Initializes the SPI port for MAX7219
 *                  
 *
 * Note:            
 *                  
 *                  
 *****************************************************************************/
void InitMAX7219(void)
{
	TRISCbits.TRISC7 = 0; // Enabling SPI Pins Master mode
	TRISBbits.TRISB1 = 0;

	OpenSPI(SPI_FOSC_64, MODE_00, SMPEND);

	tris_LOAD7219 = OUTPUT_PIN;
	LOAD7219 = 0;
}//end InitMAX7219

void SendRaw7219Packet()
{
	LOAD7219 = 0;	
	
	WriteSPI(dataPacket._byte[2]);
	WriteSPI(dataPacket._byte[3]);

	dataPacket._byte[4]=0x55;
	dataPacket._byte[5]=0xAA;
	LOAD7219 = 1;
	counter = 0xff;
	while(counter--);
}

void OutSerialData()
{
	byte index;	
	//dataPacket.data[DATA_SIZE-1] = 0; // Precaution null terminator
	LOAD7219 = 0;
	index = 0;
	counter = dataPacket.len;
	while(index<counter)
	{
		WriteSPI(dataPacket.data[index]);
		index++;
	}
}

/******************************************************************************
 * Function:        void BlinkUSBStatus(void)
 *
 * PreCondition:    None
 *
 * Input:           None
 *
 * Output:          None
 *
 * Side Effects:    None
 *
 * Overview:        BlinkUSBStatus turns on and off LEDs corresponding to
 *                  the USB device state.
 *
 * Note:            mLED macros can be found in io_cfg.h
 *                  usb_device_state is declared in usbmmap.c and is modified
 *                  in usbdrv.c, usbctrltrf.c, and usb9.c
 *****************************************************************************/
void BlinkUSBStatus(void)
{
    static word led_count=0;
    
    if(led_count == 0)led_count = 10000U;
    led_count--;

    #define mLED_Both_Off()         {mLED_1_Off();mLED_2_Off();}
    #define mLED_Both_On()          {mLED_1_On();mLED_2_On();}
    #define mLED_Only_1_On()        {mLED_1_On();mLED_2_Off();}
    #define mLED_Only_2_On()        {mLED_1_Off();mLED_2_On();}

    if(UCONbits.SUSPND == 1)
    {
        if(led_count==0)
        {
            mLED_1_Toggle();
            mLED_2 = mLED_1;        // Both blink at the same time
        }//end if
    }
    else
    {
        if(usb_device_state == DETACHED_STATE)
        {
            mLED_Both_Off();
        }
        else if(usb_device_state == ATTACHED_STATE)
        {
            mLED_Both_On();
        }
        else if(usb_device_state == POWERED_STATE)
        {
            mLED_Only_1_On();
        }
        else if(usb_device_state == DEFAULT_STATE)
        {
            mLED_Only_2_On();
        }
        else if(usb_device_state == ADDRESS_STATE)
        {
            if(led_count == 0)
            {
                mLED_1_Toggle();
                mLED_2_Off();
            }//end if
        }
        else if(usb_device_state == CONFIGURED_STATE)
        {
            if(led_count==0)
            {
                mLED_1_Toggle();
                mLED_2 = !mLED_1;       // Alternate blink                
            }//end if
        }//end if(...)
    }//end if(UCONbits.SUSPND...)

}//end BlinkUSBStatus


/** EOF user.c ***************************************************************/
user/user.h 
#ifndef PICDEM_FS_DEMO_H
#define PICDEM_FS_DEMO_H

/** I N C L U D E S **********************************************************/
#include "system\typedefs.h"

/** D E F I N I T I O N S ****************************************************/
/* MDB Version */
#define MINOR_VERSION   0x0B    //Demo Version 1.10
#define MAJOR_VERSION   0x01


#define OVER_HEAD   2           //Overhead: 
#define DATA_SIZE   (USBGEN_EP_SIZE - OVER_HEAD)

/** S T R U C T U R E S ******************************************************/
typedef union DATA_PACKET
{
    byte _byte[USBGEN_EP_SIZE];  //For byte access
    word _word[USBGEN_EP_SIZE/2];//For word access(USBGEN_EP_SIZE msut be even)
    struct
    {
        enum
        {
            READ_VERSION    = 0x00,
            /*
            READ_FLASH      = 0x01,
            WRITE_FLASH     = 0x02,
            ERASE_FLASH     = 0x03,
            READ_EEDATA     = 0x04,
            WRITE_EEDATA    = 0x05,
            READ_CONFIG     = 0x06,
            WRITE_CONFIG    = 0x07,

            ID_BOARD        = 0x31,
            UPDATE_LED      = 0x32,
            SET_TEMP_REAL   = 0x33,
            RD_TEMP         = 0x34,
            SET_TEMP_LOGGING= 0x35,
            RD_TEMP_LOGGING = 0x36,
            RD_POT          = 0x37,
			*/
			RAW_MAX_PACKET  = 0x40,
			OUT_SERIAL_DATA	= 0x41,
			PULSE_LOAD		= 0x42,
            RESET           = 0xFF
        }CMD;
        byte len;
		byte data[DATA_SIZE];
    };
/*    struct
    {
        unsigned :8;
        byte ID;
    };
    struct
    {
        unsigned :8;
        byte led_num;
        byte led_status;
    };
    struct
    {
        unsigned :8;
        word word_data;
    };*/
} DATA_PACKET;

/** P U B L I C  P R O T O T Y P E S *****************************************/
void UserInit(void);
void ProcessIO(void);

#endif //PICDEM_FS_DEMO_H
io_cfg.h 
#ifndef IO_CFG_H
#define IO_CFG_H

/** I N C L U D E S *************************************************/
#include "autofiles\usbcfg.h"

/** T R I S *********************************************************/
#define INPUT_PIN           1
#define OUTPUT_PIN          0

/** U S B ***********************************************************/
#define tris_usb_bus_sense  TRISAbits.TRISA1    // Input

#if defined(USE_USB_BUS_SENSE_IO)
#define usb_bus_sense       PORTAbits.RA1
#else
#define usb_bus_sense       1
#endif

#define tris_self_power     TRISAbits.TRISA2    // Input

#if defined(USE_SELF_POWER_SENSE_IO)
#define self_power          PORTAbits.RA2
#else
#define self_power          1
#endif

/** L E D ***********************************************************/
#define mInitAllLEDs()      LATD &= 0xF0; TRISD &= 0xF0;

#define mLED_1              LATDbits.LATD0
#define mLED_2              LATDbits.LATD1
#define mLED_3              LATDbits.LATD2
#define mLED_4              LATDbits.LATD3

#define mLED_1_On()         mLED_1 = 1;
#define mLED_2_On()         mLED_2 = 1;
#define mLED_3_On()         mLED_3 = 1;
#define mLED_4_On()         mLED_4 = 1;

#define mLED_1_Off()        mLED_1 = 0;
#define mLED_2_Off()        mLED_2 = 0;
#define mLED_3_Off()        mLED_3 = 0;
#define mLED_4_Off()        mLED_4 = 0;

#define mLED_1_Toggle()     mLED_1 = !mLED_1;
#define mLED_2_Toggle()     mLED_2 = !mLED_2;
#define mLED_3_Toggle()     mLED_3 = !mLED_3;
#define mLED_4_Toggle()     mLED_4 = !mLED_4;

/** S W I T C H *****************************************************/
#define mInitAllSwitches()  TRISBbits.TRISB4=1;TRISBbits.TRISB5=1;
#define mInitSwitch2()      TRISBbits.TRISB4=1;
#define mInitSwitch3()      TRISBbits.TRISB5=1;
#define sw2                 PORTBbits.RB4
#define sw3                 PORTBbits.RB5

/** P O T ***********************************************************/
#define mInitPOT()          TRISAbits.TRISA0=1;ADCON0=0x01;ADCON2=0x3C;

/** S P I : Chip Select Lines ***************************************/
#define tris_cs_temp_sensor TRISBbits.TRISB2    // Output
#define cs_temp_sensor      LATBbits.LATB2

#define tris_cs_sdmmc       TRISBbits.TRISB3    // Output
#define cs_sdmmc            LATBbits.LATB3

/** S D M M C *******************************************************/
#define TRIS_CARD_DETECT    TRISBbits.TRISB4    // Input
#define CARD_DETECT         PORTBbits.RB4

#define TRIS_WRITE_DETECT   TRISAbits.TRISA4    // Input
#define WRITE_DETECT        PORTAbits.RA4

/** MAX7219 **/
#define LOAD7219			PORTBbits.RB7
#define tris_LOAD7219		TRISBbits.TRISB7    // Output


#endif //IO_CFG_H
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© 2008 Arun Prabhakar | email: [email protected]