STC15W4K56S4 >> C/C++

0.91" OLED 128x32 SSD1306

---

屏：


stc15w4k56s4.h

#ifndef __STC15W4K56S4_H__
#define __STC15W4K56S4_H__

  #include <8051.h>
  #include <compiler.h>

  #ifdef REG8051_H
  #undef REG8051_H
  #endif

  SFR(ACC, 0xE0);
  SFR(B,   0xF0);
  SFR(PSW, 0xD0);
    SBIT(CY,  0xd0, 7);
    SBIT(AC,  0xd0, 6);
    SBIT(F0,  0xd0, 5);
    SBIT(RS1, 0xd0, 4);
    SBIT(RS0, 0xd0, 3);
    SBIT(OV,  0xd0, 2);
    SBIT(P,   0xd0, 0);
  SFR(SP,  0x81);
  SFR(DPL, 0x82);
  SFR(DPH, 0x83);

  SFR(P0, 0x80);
    SBIT(P00, 0x80, 0);
    SBIT(P01, 0x80, 1);
    SBIT(P02, 0x80, 2);
    SBIT(P03, 0x80, 3);
    SBIT(P04, 0x80, 4);
    SBIT(P05, 0x80, 5);
    SBIT(P06, 0x80, 6);
    SBIT(P07, 0x80, 7);
  SFR(P1, 0x90);
    SBIT(P10, 0x90, 0);
    SBIT(P11, 0x90, 1);
    SBIT(P12, 0x90, 2);
    SBIT(P13, 0x90, 3);
    SBIT(P14, 0x90, 4);
    SBIT(P15, 0x90, 5);
    SBIT(P16, 0x90, 6);
    SBIT(P17, 0x90, 7);
  SFR(P2, 0xA0);
    SBIT(P20, 0xa0, 0);
    SBIT(P21, 0xa0, 1);
    SBIT(P22, 0xa0, 2);
    SBIT(P23, 0xa0, 3);
    SBIT(P24, 0xa0, 4);
    SBIT(P25, 0xa0, 5);
    SBIT(P26, 0xa0, 6);
    SBIT(P27, 0xa0, 7);
  SFR(P3, 0xB0);
    SBIT(P30, 0xb0, 0);
    SBIT(P31, 0xb0, 1);
    SBIT(P32, 0xb0, 2);
    SBIT(P33, 0xb0, 3);
    SBIT(P34, 0xb0, 4);
    SBIT(P35, 0xb0, 5);
    SBIT(P36, 0xb0, 6);
    SBIT(P37, 0xb0, 7);
  SFR(P4, 0xC0);
    SBIT(P40, 0xc0, 0);
    SBIT(P41, 0xc0, 1);
    SBIT(P42, 0xc0, 2);
    SBIT(P43, 0xc0, 3);
    SBIT(P44, 0xc0, 4);
    SBIT(P45, 0xc0, 5);
    SBIT(P46, 0xc0, 6);
    SBIT(P47, 0xc0, 7);
  SFR(P5, 0xC8);
    SBIT(P50, 0xc8, 0);
    SBIT(P51, 0xc8, 1);
    SBIT(P52, 0xc8, 2);
    SBIT(P53, 0xc8, 3);
    SBIT(P54, 0xc8, 4);
    SBIT(P55, 0xc8, 5);
    SBIT(P56, 0xc8, 6);
    SBIT(P57, 0xc8, 7);
  SFR(P6, 0xE8);
    SBIT(P60, 0xe8, 0);
    SBIT(P61, 0xe8, 1);
    SBIT(P62, 0xe8, 2);
    SBIT(P63, 0xe8, 3);
    SBIT(P64, 0xe8, 4);
    SBIT(P65, 0xe8, 5);
    SBIT(P66, 0xe8, 6);
    SBIT(P67, 0xe8, 7);
  SFR(P7, 0xF8);
    SBIT(P70, 0xf8, 0);
    SBIT(P71, 0xf8, 1);
    SBIT(P72, 0xf8, 2);
    SBIT(P73, 0xf8, 3);
    SBIT(P74, 0xf8, 4);
    SBIT(P75, 0xf8, 5);
    SBIT(P76, 0xf8, 6);
    SBIT(P77, 0xf8, 7);
  SFR(P0M0, 0x94);
  SFR(P0M1, 0x93);
  SFR(P1M0, 0x92);
  SFR(P1M1, 0x91);
  SFR(P2M0, 0x96);
  SFR(P2M1, 0x95);
  SFR(P3M0, 0xB2);
  SFR(P3M1, 0xB1);
  SFR(P4M0, 0xB4);
  SFR(P4M1, 0xB3);
  SFR(P5M0, 0xCA);
  SFR(P5M1, 0xC9);
  SFR(P6M0, 0xCC);
  SFR(P6M1, 0xCB);
  SFR(P7M0, 0xE2);
  SFR(P7M1, 0xE1);

  SFR(PCON, 0x87);
  SFR(AUXR, 0x8E);
  SFR(AUXR1, 0xA2);
  SFR(P_SW1, 0xA2);
  SFR(CLK_DIV, 0x97);
  SFR(BUS_SPEED, 0xA1);
  SFR(P1ASF, 0x9D);
  SFR(P_SW2, 0xBA);

  SFR(IE, 0xA8);
    SBIT(EA,   0xa8, 7);
    SBIT(ELVD, 0xa8, 6);
    SBIT(EADC, 0xa8, 5);
    SBIT(ES,   0xa8, 4);
    SBIT(ET1,  0xa8, 3);
    SBIT(EX1,  0xa8, 2);
    SBIT(ET0,  0xa8, 1);
    SBIT(EX0,  0xa8, 0);
  SFR(IP, 0xB8);
    SBIT(PPCA, 0xb8, 7);
    SBIT(PLVD, 0xb8, 6);
    SBIT(PADC, 0xb8, 5);
    SBIT(PS,   0xb8, 4);
    SBIT(PT1,  0xb8, 3);
    SBIT(PX1,  0xb8, 2);
    SBIT(PT0,  0xb8, 1);
    SBIT(PX0,  0xb8, 0);
  SFR(IE2, 0xAF);
  SFR(IP2, 0xB5);
  SFR(INT_CLKO, 0x8F);

  SFR(TCON, 0x88);
    SBIT(TF1, 0x88, 7);
    SBIT(TR1, 0x88, 6);
    SBIT(TF0, 0x88, 5);
    SBIT(TR0, 0x88, 4);
    SBIT(IE1, 0x88, 3);
    SBIT(IT1, 0x88, 2);
    SBIT(IE0, 0x88, 1);
    SBIT(IT0, 0x88, 0);
  SFR(TMOD, 0x89);
  SFR(TL0, 0x8A);
  SFR(TL1, 0x8B);
  SFR(TH0, 0x8C);
  SFR(TH1, 0x8D);
  SFR(T4T3M, 0xD1);
  SFR(T3T4M, 0xD1);
  SFR(T4H, 0xD2);
  SFR(T4L, 0xD3);
  SFR(T3H, 0xD4);
  SFR(T3L, 0xD5);
  SFR(T2H, 0xD6);
  SFR(T2L, 0xD7);
  SFR(WKTCL, 0xAA);
  SFR(WKTCH, 0xAB);
  SFR(WDT_CONTR, 0xC1);

  SFR(SCON, 0x98);
    SBIT(SM0, 0x98, 7);
    SBIT(SM1, 0x98, 6);
    SBIT(SM2, 0x98, 5);
    SBIT(REN, 0x98, 4);
    SBIT(TB8, 0x98, 3);
    SBIT(RB8, 0x98, 2);
    SBIT(TI, 0x98, 1);
    SBIT(RI, 0x98, 0);
  SFR(SBUF, 0x99);
  SFR(S2CON, 0x9A);
  SFR(S2BUF, 0x9B);
  SFR(S3CON, 0xAC);
  SFR(S3BUF, 0xAD);
  SFR(S4CON, 0x84);
  SFR(S4BUF, 0x85);
  SFR(SADDR, 0xA9);
  SFR(SADEN, 0xB9);

  SFR(ADC_CONTR, 0xBC);
  SFR(ADC_RES, 0xBD);
  SFR(ADC_RESL, 0xBE);

  SFR(SPSTAT, 0xCD);
  SFR(SPCTL, 0xCE);
  SFR(SPDAT, 0xCF);

  SFR(IAP_DATA, 0xC2);
  SFR(IAP_ADDRH, 0xC3);
  SFR(IAP_ADDRL, 0xC4);
  SFR(IAP_CMD, 0xC5);
  SFR(IAP_TRIG, 0xC6);
  SFR(IAP_CONTR, 0xC7);

  SFR(CCON, 0xD8);
    SBIT(CF, 0xd8, 7);
    SBIT(CR, 0xd8, 6);
    SBIT(CCF2, 0xd8, 2);
    SBIT(CCF1, 0xd8, 1);
    SBIT(CCF0, 0xd8, 0);
  SFR(CMOD, 0xD9);
  SFR(CL, 0xE9);
  SFR(CH, 0xF9);
  SFR(CCAPM0, 0xDA);
  SFR(CCAPM1, 0xDB);
  SFR(CCAPM2, 0xDC);
  SFR(CCAP0L, 0xEA);
  SFR(CCAP1L, 0xEB);
  SFR(CCAP2L, 0xEC);
  SFR(PCA_PWM0, 0xF2);
  SFR(PCA_PWM1, 0xF3);
  SFR(PCA_PWM2, 0xF4);
  SFR(CCAP0H, 0xFA);
  SFR(CCAP1H, 0xFB);
  SFR(CCAP2H, 0xFC);

  SFR(CMPCR1, 0xE6);
  SFR(CMPCR2, 0xE7);

  SFR(PWMCFG, 0xf1);
  SFR(PWMCR, 0xf5);
  SFR(PWMIF, 0xf6);
  SFR(PWMFDCR, 0xf7);

  #define PWMC        (*(unsigned int  volatile xdata *)0xfff0)
  #define PWMCH       (*(unsigned char volatile xdata *)0xfff0)
  #define PWMCL       (*(unsigned char volatile xdata *)0xfff1)
  #define PWMCKS      (*(unsigned char volatile xdata *)0xfff2)
  #define PWM2T1      (*(unsigned int  volatile xdata *)0xff00)
  #define PWM2T1H     (*(unsigned char volatile xdata *)0xff00)
  #define PWM2T1L     (*(unsigned char volatile xdata *)0xff01)
  #define PWM2T2      (*(unsigned int  volatile xdata *)0xff02)
  #define PWM2T2H     (*(unsigned char volatile xdata *)0xff02)
  #define PWM2T2L     (*(unsigned char volatile xdata *)0xff03)
  #define PWM2CR      (*(unsigned char volatile xdata *)0xff04)
  #define PWM3T1      (*(unsigned int  volatile xdata *)0xff10)
  #define PWM3T1H     (*(unsigned char volatile xdata *)0xff10)
  #define PWM3T1L     (*(unsigned char volatile xdata *)0xff11)
  #define PWM3T2      (*(unsigned int  volatile xdata *)0xff12)
  #define PWM3T2H     (*(unsigned char volatile xdata *)0xff12)
  #define PWM3T2L     (*(unsigned char volatile xdata *)0xff13)
  #define PWM3CR      (*(unsigned char volatile xdata *)0xff14)
  #define PWM4T1      (*(unsigned int  volatile xdata *)0xff20)
  #define PWM4T1H     (*(unsigned char volatile xdata *)0xff20)
  #define PWM4T1L     (*(unsigned char volatile xdata *)0xff21)
  #define PWM4T2      (*(unsigned int  volatile xdata *)0xff22)
  #define PWM4T2H     (*(unsigned char volatile xdata *)0xff22)
  #define PWM4T2L     (*(unsigned char volatile xdata *)0xff23)
  #define PWM4CR      (*(unsigned char volatile xdata *)0xff24)
  #define PWM5T1      (*(unsigned int  volatile xdata *)0xff30)
  #define PWM5T1H     (*(unsigned char volatile xdata *)0xff30)
  #define PWM5T1L     (*(unsigned char volatile xdata *)0xff31)
  #define PWM5T2      (*(unsigned int  volatile xdata *)0xff32)
  #define PWM5T2H     (*(unsigned char volatile xdata *)0xff32)
  #define PWM5T2L     (*(unsigned char volatile xdata *)0xff33)
  #define PWM5CR      (*(unsigned char volatile xdata *)0xff34)
  #define PWM6T1      (*(unsigned int  volatile xdata *)0xff40)
  #define PWM6T1H     (*(unsigned char volatile xdata *)0xff40)
  #define PWM6T1L     (*(unsigned char volatile xdata *)0xff41)
  #define PWM6T2      (*(unsigned int  volatile xdata *)0xff42)
  #define PWM6T2H     (*(unsigned char volatile xdata *)0xff42)
  #define PWM6T2L     (*(unsigned char volatile xdata *)0xff43)
  #define PWM6CR      (*(unsigned char volatile xdata *)0xff44)
  #define PWM7T1      (*(unsigned int  volatile xdata *)0xff50)
  #define PWM7T1H     (*(unsigned char volatile xdata *)0xff50)
  #define PWM7T1L     (*(unsigned char volatile xdata *)0xff51)
  #define PWM7T2      (*(unsigned int  volatile xdata *)0xff52)
  #define PWM7T2H     (*(unsigned char volatile xdata *)0xff52)
  #define PWM7T2L     (*(unsigned char volatile xdata *)0xff53)
  #define PWM7CR      (*(unsigned char volatile xdata *)0xff54)

#endif

main.c

#include "stc15w4k56s4.h"

#define I2C_SDA   P01
#define I2C_SCL   P00

#define SSD1306_ADDRESS             0x78
#define SSD1306_LCDWIDTH            128
#define SSD1306_LCDHEIGHT           32
#define SSD1306_SETCONTRAST         0x81
#define SSD1306_DISPLAYALLOW_RESUME 0xA4
#define SSD1306_DISPLAYALLOW        0xA5
#define SSD1306_NORMALDISPLAY       0xA6
#define SSD1306_INVERTDISPLAY       0xA7
#define SSD1306_DISPLAYOFF          0xAE
#define SSD1306_DISPLAYON           0xAF
#define SSD1306_SETDISPLAYOFFSET    0xD3
#define SSD1306_SETCOMPINS          0xDA
#define SSD1306_SETVCOMDETECT       0xDB
#define SSD1306_SETDISPLAYCLOCKDIV  0xD5
#define SSD1306_SETPRECHARGE        0xD9
#define SSD1306_SETMULTIPLEX        0xA8
#define SSD1306_SETLOWCOLUMN        0x00
#define SSD1306_SETHIGHCOLUMN       0x10
#define SSD1306_SETSTARTLINE        0x40
#define SSD1306_MEMORYMODE          0x20
#define SSD1306_COLUMNADDR          0x21
#define SSD1306_PAGEADDR            0x22
#define SSD1306_COMSCANINC          0xC0
#define SSD1306_COMSCANDEC          0xC8
#define SSD1306_SEGREMAP            0xA0
#define SSD1306_CHARGEPUMP          0x8D
#define SSD1306_EXTERNALVCC         0x01
#define SSD1306_SWITCHCAPVCC        0x02

void delay(unsigned cnt)
{
  while(cnt--);
}

void i2c_start(void)
{
  I2C_SDA = 1;
  I2C_SCL = 1;
  delay(10);
  I2C_SDA = 0;
  delay(10);
  I2C_SCL = 0;
}

void i2c_stop(void)
{
  delay(10);
  I2C_SDA = 0;
  delay(10);
  I2C_SCL = 1;
  delay(10);
  I2C_SDA = 1;
}

unsigned char i2c_write(unsigned char val)
{
  unsigned char i=9, ack=0;

  while(--i){
    delay(10);
    I2C_SDA = (val & 0x80) ? 1 : 0;
    delay(10);
    I2C_SCL = 1;
    delay(10);
    val<<= 1;
    I2C_SCL = 0;
  }
  delay(10);
  I2C_SDA = 1;
  delay(10);
  I2C_SCL = 1;
  delay(10);
  ack = I2C_SDA;
  delay(10);
  I2C_SCL = 0;
  return ack;
}

unsigned char i2c_read(unsigned char ack)
{
  unsigned char i=9, val=0;

  while(--i){
    val<<= 1;
    delay(10);
    I2C_SCL = 1;
    delay(10);
    val|= I2C_SDA;
    delay(10);
    I2C_SCL = 0;
  }
  delay(10);
  I2C_SDA = ack;
  delay(10);
  I2C_SCL = 1;
  delay(10);
  I2C_SCL = 0;
  return val;
}

void i2c_write_byte(unsigned char saddr, unsigned char raddr, unsigned char val)
{
  unsigned char i=10;

  while(--i){
    i2c_start();
    if(i2c_write(saddr)){
      continue;
    }
    if(i2c_write(raddr)){
      continue;
    }
    if(i2c_write(val)){
      continue;
    }
    i2c_stop();
    break;
  }
}

unsigned char i2c_read_byte(unsigned char saddr, unsigned char raddr)
{
  unsigned char i=10, value=0;

  while(--i){
    i2c_start();
    if(i2c_write(saddr & 0xfe)){
      continue;
    }
    if(i2c_write(raddr)){
      continue;
    }
    i2c_start();
    if(i2c_write(saddr | 1)){
      continue;
    }
    value = i2c_read(1);
    i2c_stop();
    break;
  }
  return value;
}

void gpio_init(void)
{
  P0M0 = 0x00;
  P0M1 = 0x00;
  P1M0 = 0x00;
  P1M1 = 0x00;
  P2M0 = 0x00;
  P2M1 = 0x00;
  P3M0 = 0x00;
  P3M1 = 0x00;
  P4M0 = 0x00;
  P4M1 = 0x00;
}

void ssd1306_cmd(unsigned char c)
{
  i2c_start();
  i2c_write(SSD1306_ADDRESS);
  i2c_write(0x00);
  i2c_write(c);
  i2c_stop();
}

void ssd1306_data(unsigned char c)
{
  i2c_start();
  i2c_write(SSD1306_ADDRESS);
  i2c_write(0x40);
  i2c_write(c);
  i2c_stop();
}

void ssd1306_init(void)
{
  ssd1306_cmd(SSD1306_DISPLAYOFF);
  ssd1306_cmd(SSD1306_SETDISPLAYCLOCKDIV);
  ssd1306_cmd(0x80);
  ssd1306_cmd(SSD1306_SETMULTIPLEX);
  ssd1306_cmd(0x1F);
  ssd1306_cmd(SSD1306_SETDISPLAYOFFSET);
  ssd1306_cmd(0x00);
  ssd1306_cmd(SSD1306_SETSTARTLINE);
  ssd1306_cmd(SSD1306_CHARGEPUMP);
  ssd1306_cmd(0x14);
  ssd1306_cmd(SSD1306_MEMORYMODE);
  ssd1306_cmd(0x00);
  ssd1306_cmd(SSD1306_SEGREMAP | 0x01);
  ssd1306_cmd(SSD1306_COMSCANDEC);
  ssd1306_cmd(SSD1306_SETCOMPINS);
  ssd1306_cmd(0x02);
  ssd1306_cmd(SSD1306_SETCONTRAST);
  ssd1306_cmd(0x8F);
  ssd1306_cmd(SSD1306_SETPRECHARGE);
  ssd1306_cmd(0xF1);
  ssd1306_cmd(SSD1306_SETVCOMDETECT);
  ssd1306_cmd(0x40);
  ssd1306_cmd(SSD1306_DISPLAYALLOW_RESUME);
  ssd1306_cmd(SSD1306_NORMALDISPLAY);
  ssd1306_cmd(SSD1306_DISPLAYON);
}

void ssd1306_set_col_addr(void)
{
  ssd1306_cmd(SSD1306_COLUMNADDR);
  ssd1306_cmd(0);
  ssd1306_cmd(SSD1306_LCDWIDTH-1);
}

void ssd1306_set_page_addr(void)
{
  ssd1306_cmd(SSD1306_PAGEADDR);
  ssd1306_cmd(0);
  ssd1306_cmd((SSD1306_LCDHEIGHT/8)-1);
}

void main(void)
{
  unsigned int i, col=0;

  gpio_init();
  AUXR|= 0x80;

  ssd1306_init();

  while(1){
    ssd1306_set_col_addr();
    ssd1306_set_page_addr();
         
    i2c_start();
    i2c_write(SSD1306_ADDRESS);
    i2c_write(0x40);
    for(i=0; i<512; i++){
      i2c_write(0xff);
    }
    i2c_stop();
  }
}

Makefile

all:
	sdcc main.c
	packihx main.ihx > main.hex

flash:
	sudo stcgal -p /dev/ttyO2 -P stc15 -o clock_source=external main.hex

clean:
	rm -rf main.ihx main.lst main.mem main.rst main.lk main.map main.rel main.sym main.hex

完成

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