STC32G端口设置问题 | 已解决

FL_***

用STC端口2^6和2^7模拟I2C，同样的代码在STC15W4K48S上可以正常运行。尝试移植到STC32G12K128，总是无法点亮OLED12832屏幕，请各位大侠提供一些建议。

不想要外加上拉电阻（原来电路上没有加）；也不想用硬件I2C（不想大改代码）
注：确定电路连接没问题。已尝试过设为准双向口；开内部上拉电阻；SDA设置为开漏+SCL设置为强推挽等均无效。

程序：

神***

1, 打开内部 4K 上拉电阻
2，多加些 NOP 延时，速度快了

FL_***

神*** 发表于 2024-2-7 19:15
1, 打开内部 4K 上拉电阻
2，多加些 NOP 延时，速度快了

//  WTST = 0;  //设置程序指令延时参数，赋值为0可将CPU执行指令的速度设置为最快
  EAXFR = 1; //扩展寄存器(XFR)访问使能
  CKCON = 0; //提高访问XRAM速度
       
         
        P2M0 = 0x00; P2M1 = 0x00;
  P2PU = 0xff;


打开内部 4K 上拉电阻，降速还是不行


void I2C_3(Uchar mcmd)
{
Uchar length = 8;                        // Send Command

        while(length--)
        {
                if(mcmd & 0x80)
                {
                        SDA3=1;
                }
                else
                {
                        SDA3=0;
                }
                uDelay(3);
                SCL3=1;
                uDelay(3);
                SCL3=0;
                uDelay(3);
                mcmd = mcmd << 1;
        }
}

LAO***

由于 CPU构架 复杂程度 STC32 > STC8 > STC15, 总线的复杂程度增加, 引起 IO口翻转速度减慢.

解决方法 1: IO口 加上拉电阻, 可保持原通讯速率.

解决方法 2: 降低通讯速率 , 为原通讯速率 的1/2倍 试试, 如不行只能再降低 通讯速率. 否则会通讯不正常或丢失第一位数据.

21cns***

感觉还是时序方面的原因，速度太快了，建议用逻辑分析仪看一下具体原因，找到合适的通信速率。

FL_***

感谢大家！问题已解决，记录一下解决办法：
1. 转换时加延时；
2.模拟端口2^6、2^7换成2^0、2^1；前面两个端口模拟总是无法成功，加了延时也没有效果，原因不明。

//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

#include <STC32G.h>
//#include "stc15w4k32s4.h"
//#include <reg52.h>
#include <intrins.h>



#define Uchar unsigned char
#define Uint  unsigned int
#define Ulong unsigned long
#define uchar unsigned char
#define uint  unsigned int


//-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//  Pin Definition
//-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

//sbit SDA3=P2^6;                        //2_6串行的数据口51
//sbit SCL3=P2^7;                 //2_7串行的同步时钟52
sbit SDA3=P2^0;                        //2_6串行的数据口41
sbit SCL3=P2^1;                 //2_7串行的同步时钟42
sbit p3_0=P3^0;
sbit p3_1=P3^1;

//*********************************************************************0.66
char code color13[]={
/*--  调入了一幅图像：F:\工作\8051\OLED3\12832\1.bmp  --*/
/*--  宽度x高度=128x32  --*/
0xFF,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,
0x00,0xFF,0xFF,0xFF,0x00,0x00,0x60,0x78,0x5C,0x47,0x43,0x40,0xFF,0xFF,0xFF,0x40,
0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x2F,0x27,0xC3,0x00,0x20,0xE0,0x20,0x20,0x40,0x80,0x08,0x88,0x4F,0x2F,0x2F,0x48,
0x88,0x00,0x00,0x60,0x20,0xE0,0x20,0x60,0x00,0x00,0xC0,0x20,0x20,0x20,0x60,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,
0xFF,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,
0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0xA0,0xBF,0xA0,0x80,
0x80,0x80,0xB0,0xA8,0xA4,0xA2,0xA1,0x80,0x80,0x9C,0xA3,0xA2,0xA3,0x9C,0x80,0xA0,
0xB8,0xA7,0x87,0xB8,0xA0,0x80,0x80,0x90,0xA0,0xA1,0xA1,0x9E,0x80,0x80,0xB0,0xA8,
0xA4,0xA2,0xA1,0x80,0xA0,0xBF,0xA0,0xA0,0x90,0x8F,0x80,0x8F,0x90,0xA0,0xA0,0x90,
0x8F,0x80,0x80,0x80,0xA0,0xBF,0xA0,0x80,0x80,0x80,0xB0,0xA1,0xA2,0xA2,0x9C,0x80,
0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,
0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0xFF
};
char code color14[]={/*--  调入了一幅图像：F:\工作\8051\OLED3\12832\中文显示1.bmp  --*/
/*--  宽度x高度=128x32  --*/
0x00,0x20,0xA0,0x78,0x20,0xF8,0x20,0x00,0x00,0x00,0x10,0xF8,0x00,0x00,0x00,0x00,
0xF0,0x08,0x08,0x08,0xF0,0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00,0x00,0xF8,0x88,
0x88,0x88,0xFE,0x88,0x88,0x88,0x88,0xF8,0x00,0x00,0x20,0x10,0xF8,0x06,0x20,0x20,
0x7E,0x90,0x88,0x88,0x84,0xE0,0x00,0x00,0x00,0x00,0x00,0x80,0x7E,0x80,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0xFE,0x92,0x92,0x92,0xF2,0x92,0x92,0x92,0x9E,0x80,0x80,
0x00,0x00,0x08,0x08,0x08,0xFE,0x08,0x08,0x08,0xFE,0x08,0x08,0x00,0x00,0x20,0x24,
0xA4,0xFC,0xA2,0x22,0x20,0xF8,0x08,0x08,0xF8,0x00,0x00,0x00,0xFE,0x02,0x4A,0x4A,
0xFA,0x4A,0xCA,0x4A,0x02,0xFE,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x07,0x08,0x08,0x08,0x07,0x00,0x00,0x00,0x0C,0x0C,0x00,0x00,0x00,0x00,0x01,0x00,
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0x08,0x18,0x08,0x00,0x00,0x1F,0x10,0x08,0x84,0x00,0x03,0x04,0x08,0x10,0x10,0x1C,
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0x00,0x10,0x08,0x04,0xFE,0x01,0x01,0x08,0x88,0x3F,0x44,0x44,0x42,0x43,0x72,0x00,
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0x00,0x00,0x00,0xFF,0x49,0x49,0x49,0x49,0x79,0xC9,0x49,0x49,0x4F,0x40,0x40,0x00,
0x00,0x00,0x08,0x08,0x08,0x08,0xFF,0x08,0x08,0x08,0x08,0xFF,0x08,0x08,0x08,0x00,
0x00,0x00,0x12,0x12,0xD2,0xFE,0x91,0x11,0x11,0x00,0xFC,0x04,0x04,0x04,0xFC,0x00,
0x00,0x02,0x1F,0x02,0x02,0x1F,0x02,0x02,0x00,0x00,0x10,0x10,0x1F,0x10,0x10,0x00,
0x00,0x00,0x18,0x14,0x12,0x11,0x10,0x18,0x00,0x00,0x00,0x00,0x18,0x18,0x00,0x00,
0x00,0x00,0x00,0x03,0x01,0x01,0x01,0x01,0x7F,0x01,0x01,0x01,0x01,0x03,0x00,0x00,
0x00,0x00,0x02,0x02,0x02,0x02,0x02,0x02,0x7F,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
0x00,0x00,0x20,0x10,0x08,0x06,0x01,0x00,0x00,0x00,0x03,0x06,0x0C,0x18,0x30,0x10,
0x00,0x00,0x00,0x7F,0x20,0x10,0x08,0x00,0x00,0x01,0x06,0x08,0x10,0x20,0x78,0x00,
0x00,0x01,0x01,0x41,0x21,0x19,0x0F,0x05,0x01,0x01,0x03,0x05,0x19,0x71,0x21,0x01,
0x00,0x08,0x04,0x03,0x00,0x7F,0x00,0x07,0x02,0x00,0x1F,0x08,0x08,0x08,0x1F,0x00
};

//-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

void         delay_ms(Uint t)
{
        Uchar i,j;
        while(--t)
        {
        i=50;       
        j=100;

                while(--j)
                        while(--i);
        }
}
void uDelay(Uchar l)
{
        while(l--);
}


void Delay(Uchar n)
{
Uchar i,j,k;

        for(k=0;k<n;k++)
        {
                for(i=0;i<131;i++)
                {
                        for(j=0;j<15;j++)
                        {
                                uDelay(203);       
                        }
                }
        }
}



//****************************************************************************
//-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//  Read/Write Sequence
//-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
void I2C_3(Uchar mcmd)
{
Uchar length = 8;                        // Send Command

        while(length--)
        {
                if(mcmd & 0x80)
                {
                        SDA3=1;
                }
                else
                {
                        SDA3=0;
                }
                uDelay(3);
                SCL3=1;
                uDelay(3);
                SCL3=0;
                uDelay(3);
                mcmd = mcmd << 1;
        }
}


void I2C_Ack3()
{
        SDA3=1;
        uDelay(3);
        SCL3=1;
        uDelay(3);
        SCL3=0;
        uDelay(3);
}


void I2C_NAck3()
{
        SDA3=0;
        uDelay(3);
        SCL3=1;
        uDelay(3);
        SCL3=0;
        uDelay(3);
}


void I2C_Start3()
{
        SDA3=0;
        uDelay(3);
        SCL3=1;
        uDelay(3);
        SCL3=0;
        uDelay(3);
        I2C_3(0x78);
        I2C_Ack3();
}


void I2C_Stop3()
{
        SCL3=1;
        uDelay(5);
        SDA3=0;
        uDelay(5);
        SDA3=1;
        uDelay(5);
}


void Write_Command3(Uchar Data)
{
        I2C_Start3();
        I2C_3(0x00);
        I2C_Ack3();
        I2C_3(Data);
        I2C_Ack3();
        I2C_Stop3();
}


void Write_Data3(Uchar Data)
{
        I2C_Start3();
        I2C_3(0x40);
        I2C_Ack3();
        I2C_3(Data);
        I2C_Ack3();
        I2C_Stop3();
}
//-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

void        LCD_Init3(void)
{


        Write_Command3(0xae);        //--turn off oled panel

        Write_Command3(0x00);        //--set low column address
        Write_Command3(0x10);        //--set high column address

        Write_Command3(0x00);        //--set start line address

        Write_Command3(0xb0);        //--set page address

        Write_Command3(0x81);        //--set contrast control register
        Write_Command3(0xff);

        Write_Command3(0xa1);        //--set segment re-map 127 to 0   a0:0 to seg127
        Write_Command3(0xa6);        //--set normal display

        Write_Command3(0xc8);        //--set com(N-1)to com0  c0:com0 to com(N-1)

        Write_Command3(0xa8);        //--set multiples ratio(1to64)
        Write_Command3(0x1f);        //--1/64 duty

        Write_Command3(0xd3);        //--set display offset
        Write_Command3(0x00);        //--not offset

        Write_Command3(0xd5);        //--set display clock divide ratio/oscillator frequency
        Write_Command3(0x80);        //--set divide ratio

        Write_Command3(0xd9);        //--set pre-charge period
        Write_Command3(0x04);

        Write_Command3(0xda);        //--set com pins hardware configuration
        Write_Command3(0x00);

        Write_Command3(0xdb);        //--set vcomh
        Write_Command3(0x30);

        Write_Command3(0x8d);        //--set chare pump enable/disable
        Write_Command3(0x14);        //--set(0x10) disable
        //Write_Command3(0x10);        //--set(0x10) disable
        Write_Command3(0xaf);        //--turn on oled panel
        //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=void         LCD_Init(void)
}


//***********************************************************************
void clr_display3(void)
{
        Uchar i,j;
        for(j=0;j<4;j++)
        {
                Write_Command3(0x22);//--set page1
                Write_Command3(j);//--set start page
                Write_Command3(0x03);//--set end page

                for(i=0;i<128;i++)                                                  //显示单色数据到LCD
                {
                        Write_Data3(0x00);
                }
        }
}
                       
//-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

//-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
void pic13(void)
{
        Uchar i,j;
        Uint k;
        k=0;
        for(j=0;j<4;j++)
        {
                Write_Command3(0x22);//--set page1
                Write_Command3(j);//--set start page
                Write_Command3(0x03);//--set end page

                for(i=0;i<128;i++)                                                  //显示单色数据到LCD
                {
                        Write_Data3(color13[k]);
                        k=k+1;
               
                }
        }
}


void pic14(void)
{
        Uchar i,j;
        Uint k;
        k=0;
        for(j=0;j<4;j++)
        {
                Write_Command3(0x22);//--set page1
                Write_Command3(j);//--set start page
                Write_Command3(0x03);//--set end page

                for(i=0;i<128;i++)                                                  //显示单色数据到LCD
                {
                        Write_Data3(color14[k]);
                        k=k+1;
               
                }
        }
}
                       
//-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

//-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
void main()
{
        WTST = 0;  //设置程序指令延时参数，赋值为0可将CPU执行指令的速度设置为最快
        EAXFR = 1; //扩展寄存器(XFR)访问使能
        CKCON = 0; //提高访问XRAM速度
       
         
        P2M0 = 0x00; P2M1 = 0x00;
  P2PU = 0xff;

        LCD_Init3();
        p3_0=1;p3_1=0;       
        while(1)

        {   
                pic13();
                delay_ms(10);
                pic14();
                delay_ms(10);
                p3_0=~p3_0;

        }
}

神***

可以用仿真器来访，查找软件的原因


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