LPC2103 spi port drive 74595 8-bit digital display experiment

LPC2103 spi port drive 74595 8-bit digital display experiment

//

//System settings: Fosc, Fcclk, Fcco, Fpclk

//#define Fosc 12000000

//#define Fcclk (Fosc * 5)

//#define Fcco (Fcclk *4)

//#define Fpclk (Fcclk / 4) * 4

//Fpclk=60000000

Wiring instructions: Use three 1P DuPont cables to connect the core board P04/P06/P07 to the backplane JP26

The specific wiring is: P04-SHCP, P06-DS, P07-STCP.

Jumper Description: Short J70

Experimental phenomenon: The digital tube sweeps first and then displays 0-9

************************************************** ***********

#define IN_MAIN

#include "config.h"

#include "LPC2103_lian.H"

#include "ADC.h"

#include "ExtInterrupt.h"

#include "I2C.h"

#include "IAP.h"

#include "Legacy_GPIO.h"

#include "RTC.h"

#include "SPI.h"

#include "SSP.h"

#include "Time.h"

#include "UART.h"

#include "WatchDog.h"

#include "ISR.h"

#pragma import(__use_no_semihosting_swi)

#define rclk_0() IO0CLR=IO0CLR|p07 //74959 latch clock

#define rclk_1() IO0SET=IO0SET|p07

Const uint8 tb[]={

0xfe, 0xfd, 0xfb, 0xf7, 0xef, 0xdf, 0xbf, 0x7f,

0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8, 0x80, 0x90,

0x88, 0x83, 0xc6, 0xa1, 0x86, 0x8e, 0x00,

};

Const uint8 smg_text[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f,};

Const uint8 smg[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x00,};

// 0 1 2 3 4 5 6 7 8 9 all

Const uint8 smg_bit[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80,0xff,};

Uint8 c;

Uint8 d;

Void IRQ_Exception(void)

{

}

//**********************Function Definition************************

Void delay(uint32 dly);

Void spiinit(void);

Uint8 senddata_mspi(uint8 uiData);

//**********************Main function************************ **

Void Main(void)

{

TargetInit(VPBDIV_DATA, PLLCFG_DATA, MAMTIM_DATA); // don't delete

While((PLLSTAT & (1 << 10)) == 0); // can delete

P04_sck0;

P06_mosi0;

P05_miso0;

P07_gpio; //Set the port to gpio port

Gpio_out(p07); // Set as output

Delay(1);

Spiinit();

For(d=0;d<8;d++)

{

For(c=0;c<8;c++)

{

Rclk_0();

Senddata_mspi(smg_bit[d]);

Senddata_mspi(smg_text[c]);

Rclk_1();

Delay(200);

}

}

While(1)

{

For(c=0;c<11;c++)

{

Rclk_0();

Senddata_mspi(smg_bit[8]);

Senddata_mspi(smg[c]);

Rclk_1();

Delay(200);

Delay(200);

Delay(200);

}

}

}

//********************* Initialize the SPI interface********************

Void spiinit(void)

{

SPI_SPCCR = 8; / / set the SPI clock divider, the value must be greater than or equal to 8 even (the greater the value, the lower the spi clock)

SPI_SPCR =0<<2 | // Transfer 8-bit data at a time

0<<3 | //CPHA=0, the first edge sampling. CPHA=1, the second edge sampling

0<<4 | // When the SPI bus is idle, CPOL = 1, the clock is high. CPOL = 0, the clock is low

1<<5 | //MSTR=1, set to master mode

0<<6 | //LSBF=0, SPI transmits MSB first

0<<7 ; //SPIE=0, SPI interrupt disabled

}

//******************spi send and receive data ******************

Uint8 senddata_mspi(uint8 uiData)

{

SPI_SPDR=uiData;

While((SPI_SPSR&0x80)==0); // Wait for the data to be sent

Return(SPI_SPDR);

}

//************************Delay********************** ****

Void delay(uint32 dly)

{

Uint32 i;

For(;dly>0;dly--)

{

For(i=0;i<5000;i++);

}

}

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