I2C找不到设备可能是焊接问题吗? -

标题: I2C找不到设备可能是焊接问题吗? [打印本页]

作者: wang元 时间: 2023-7-18 17:08
标题: I2C找不到设备可能是焊接问题吗?
I2C通讯下的IC地址是0x88（最后一位写）因为pcb正反面画错，导致焊接时掰引脚，正面在下。驱动程序应该是没错的，因为检查设备时可以收到“无设备”的应答也就是1，所以I2C是可以使用的。现在找不到这个IC，可能是焊接问题吗？

1.png (13.17 KB, 下载次数: 49)

作者: avanyway 时间: 2023-7-18 18:23
尝试用个 IIC地址扫描程序看看会不会扫描出其他地址万一芯片是非正品呢

作者: xuyaqi 时间: 2023-7-18 20:01
如果驱动程序没错，那肯定先检查焊接是否正确。

作者: yzwzfyz 时间: 2023-7-19 08:56
解决方案：
1、查硬件线路，供电及各点电位正常。
2、再仔细阅读芯片手册。是否按手册要求做了。

作者: feeling1791 时间: 2023-7-19 11:26
给个早期的C51的代码你参考，PT2314电源最好用8V，PT2314E可以用5V电源，二者均不支持3V3，上拉电阻拉到PT2314供电上

#include"..\source\audio.h"

//全局变量定义
unsigned char g_Audio_Volume;
unsigned char g_Audio_Treble;
unsigned char g_Audio_Bass;
unsigned char g_Audio_Balance;
unsigned char g_Audio_Channel;
unsigned char code Volume_Buf[] = { 0, 2, 4, 6, 8,10,12,14,16,18,
                                 19,20,21,22,23,24,25,26,27,28,
                                 29,31,33,35,37,39,41,43,45,47,
                                 48,49,50,51,52,53,53 };
/*********************************************************************************************
Function: 此函数把一个字节数据输入到I2C总线上,并确认传输有效
*********************************************************************************************/
bit PT2314_Write_Byte(unsigned char byte)
{
      unsigned char temp = 0x00;
      bit Acknowledge = 0;
      for(temp=0;temp<8;temp++)
      {
                  PT2314_SCL = 0;
                  NOP;
                  NOP;
                     NOP;
                     NOP;
                  if(byte & 0x80)
                           PT2314_SDA = 1;
                  else
                           PT2314_SDA = 0;
            NOP;
                  NOP;
                     NOP;
                     NOP;
                  PT2314_SCL = 1;
                  byte =byte << 1;
      }

      PT2314_SCL = 0;
      PT2314_SDA = 1;
      NOP;
      NOP;
      PT2314_SCL = 1;
      NOP;
      NOP;
         while(!PT2314_SCL);
if(PT2314_SDA)
            Acknowledge = 1;

      PT2314_SCL = 0;
      NOP;
      NOP;
return(Acknowledge);       //Acknowledge = 1数据写入失败
}

//本函数进行命令写入，进行设置命令传输。
void PT2314_Write(unsigned char temp1,unsigned char temp2)
{
unsigned char j = 5;
      PT2314_SCL = 1; //输入设置
      NOP;
      NOP;
      PT2314_SDA = 1;
      NOP;
      NOP;
      while(!PT2314_SCL);
      PT2314_SDA = 0;
      NOP;
      NOP;
      PT2314_SCL = 0;    //I2C启动

      PT2314_Write_Byte(0x88);
while(PT2314_Write_Byte(temp1 + temp2)&&(j--));  //写入失败反复写5次

      NOP;
      NOP;
PT2314_SDA = 0;
NOP;
NOP;
PT2314_SCL = 1;
NOP;
NOP;
      while(!PT2314_SCL);             //I2C结束
PT2314_SDA = 1;
}

//本函数设置输入音频通道
void Set_PT2314_CHL(unsigned char temp_ch)
{
         unsigned char temp;
         if(b_PT2314_Lound)
         {
                  temp = temp_ch | 0x08;
         }
         else
         {
                  temp = temp_ch |0x0c;
         }
         PT2314_Write(0x50,temp);
}
//本函数设置音量衰减,音量增大为衰减量减小
void Set_PT2314_VOL(unsigned char vol)
{
         if(b_PT2314_Mute || (vol == 0))
         {
                  PT2314_Write(0x00,0x3f);
         }
         else
         {
                  PT2314_Write(0x00,(63 - Volume_Buf[vol]));
         }

}
/*********************************/
#if 0
void Set_PT2314_FL(unsigned char fl)
{
         PT2314_Write(0xc0,(0x1f - fl));
}

void Set_PT2314_FR(unsigned char fr)
{
         PT2314_Write(0xe0,(0x1f - fr));
}
#endif
/**********************************/

//下列函数设置高低音调
void Set_PT2314_TRE(unsigned char tre)
{
      if(tre <= 7)
      {
            PT2314_Write(0x70,tre);
      }
      else
      {
                  PT2314_Write(0x70,(23 - tre));
      }
}

void Set_PT2314_BAS(unsigned char bas)
{
      if(bas <= 7)
      {
            PT2314_Write(0x60,bas);
      }
      else
      {
                  PT2314_Write(0x60,(23 - bas));
      }
}

//此函数设置平衡
void Set_PT2314_BAL(unsigned char bal)
{
         if (bal > 7)
         {

                        PT2314_Write( 0xe0,(2 * (bal - 7)) ); //right
                        PT2314_Write( 0xc0,0x00 );
         }
         else if (bal < 7)
         {

                        PT2314_Write( 0xc0,(2 * (7 - bal)) ); //left
                        PT2314_Write( 0xe0,0x00 );
         }

            PT2314_Write(0xe0,0x00); //声场平衡恢复居中设置
            PT2314_Write(0xc0,0x00);

}

/**************************************************************/
void Audio_Set_ALL(void)          //音效设置
{
      Set_PT2314_CHL(g_Audio_Channel);
      Set_PT2314_TRE(g_Audio_Treble);
Set_PT2314_BAS(g_Audio_Bass);
Set_PT2314_BAL(g_Audio_Balance);
Set_PT2314_VOL(g_Audio_Volume);
}
/**************************************************************/

void Audio_Channel_SELECT(void) //通道选择
{
         g_Audio_Channel++;

         if(g_Audio_Channel >= 4)
         {

                  g_Audio_Channel = 0;
         }

         if(g_Audio_Channel == DVD_MODE)
         {
                  DVD_POWER = 1;

         }
         else
         {
                  DVD_POWER = 0;

         }

         if(g_Audio_Channel == TUNER_MODE)
         {
            b_tuner_flag = 1;
         }
         else
         {
                  b_tuner_flag = 0;
         }

         Set_PT2314_CHL(g_Audio_Channel);
}
/**************************************************************/
void Audio_Volume_UP(void)       //主音量调节
{
         if(g_Audio_Volume < 36)
         {
                  g_Audio_Volume++;
         }
         Set_PT2314_VOL(g_Audio_Volume);
}
void Audio_Volume_DW(void)
{
         if(0 < g_Audio_Volume)
         {
                  g_Audio_Volume--;
         }
         Set_PT2314_VOL(g_Audio_Volume);
}

/**************************************************************/
void Audio_Treble_UP(void)       //高音调节
{
         if(g_Audio_Treble < 14)
         {
                  g_Audio_Treble++;
         }
         Set_PT2314_TRE(g_Audio_Treble);
}
void Audio_Treble_DW(void)
{
         if(0 < g_Audio_Treble)
         {
                  g_Audio_Treble--;
         }
         Set_PT2314_TRE(g_Audio_Treble);
}

/**************************************************************/
void Audio_Bass_UP(void)       //低音调节
{
         if(g_Audio_Bass < 14)
         {
                  g_Audio_Bass++;
         }
         Set_PT2314_BAS(g_Audio_Bass);
}
void Audio_Bass_DW(void)
{
         if(0 < g_Audio_Bass)
         {
                  g_Audio_Bass--;
         }
         Set_PT2314_BAS(g_Audio_Bass);
}
/**************************************************************/
/*
void Audio_Balance_RIGHT(void)    //平衡调节
{
         if(g_Audio_Balance < 14)
         {
                  g_Audio_Balance++;
         }
         Set_PT2314_BAL(g_Audio_Balance);
}

void Audio_Balance_LEFT(void)
{
         if(0 < g_Audio_Balance)
         {
                  g_Audio_Balance--;
         }
         Set_PT2314_BAL(g_Audio_Balance);
}*/
/**************************************************************/
/*void Audio_Lound_SWITCH(void)    //等响开关
{
         b_PT2314_Lound = ~b_PT2314_Lound;
         Set_PT2314_CHL(g_Audio_Channel);
}
/**************************************************************/
void Audio_MUTE(void)             //静音
{
         AMP_MUTE = ~AMP_MUTE;
         b_PT2314_Mute = ~b_PT2314_Mute;
         Set_PT2314_VOL(g_Audio_Volume);
}
/**************************************************************/
void Audio_Init(void)             //音效初始化
{
         g_Audio_Volume = DEFAULT_VOL;
   g_Audio_Treble = DEFAULT_TRE;
   g_Audio_Bass = DEFAULT_BAS;
   g_Audio_Balance = DEFAULT_BAL;
   g_Audio_Channel = DVD_MODE;

         Audio_Set_ALL();
}

#ifndef _AUDIO_H_
#define _AUDIO_H_
#include "public.h"
#include "configure.h"

////////////////////////////////////////////////////////////////////////////////
//常量定义
#define  DEFAULT_BAL 7
#define  DEFAULT_TRE 7
#define  DEFAULT_BAS 7
#define  DEFAULT_VOL 12

#define  DVD_MODE       3
#define  AUX_MODE       2
#define  PC_MODE       1
#define  TUNER_MODE    0

//全局函数申明
extern void Audio_Set_ALL(void);
extern void Audio_Channel_SELECT(void);
extern void Audio_Volume_UP(void);
extern void Audio_Volume_DW(void);

extern void Audio_Treble_UP(void);
extern void Audio_Treble_DW(void);

extern void Audio_Bass_UP(void);
extern void Audio_Bass_DW(void);

extern void Audio_MUTE(void);
extern void Audio_Init(void);

#endif

作者: hi等你 时间: 2023-7-19 13:19
PT2314？也就是个音量控制，线路不复杂，不要焊在板子上，先建议焊电源线和两个通讯线

送八位命令看看它有没有ACK。

欢迎光临 (http://www.51hei.com/bbs/)