[参考译文] TMS320DM6446：TMS320DM6446

Sanjay、

如需了解任何详细的软件支持、请联系下面推荐的任何精选合作伙伴。 他们拥有丰富的 DM64x 软件专业知识和系统经验。

它们是(按字母顺序排列)：

D3 Engineering (sales@d3engineering.com)

eInfochips (ajat.dhawal@einfochips.com)

Ittiam Systems (ids-mkt@ittiam.com)

Path 合作伙伴技术(sales@pathpartnertech.com)

Z3 Technologies (sales@z3technology.com)

此致、
帕维尔

您好！

由于所面临的问题本质上是与 TI ARM 处理器中的标准 I2C 接口相关的通用问题、因此我正在寻找一个问题的紧急解决方案、因此请对下面描述的问题作出响应：

我必须使用的 I2C 外设对 PCA2129执行写和读操作

TMS320DM6446配置为更成熟。  我正在检查从的 I2C 发送的数据(包括从器件地址)

示波器上的 TMS320DM6446与实际数据不匹配

代码中编写的代码。

所使用的 I2C 代码、数据表

PCA2129 、在示波器上捕获的波形和模块原理图随附以供参考。

振荡器频率

我们的电路板为27MHz (I/p 至 TMS320DM6446)。

请建议什么

可能是问题吗？

注- PCA2129需要 I2C 协议

在 PCA2129数据表的第-56页中提到。

如果您需要更多详细信息、请告知我们。

要求 作出迅速反应，因为我们需要紧急解决这一问题。

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

使用的代码如下所示：



#include "stdio.h"
#include "davincievm.h"
#include "davincievm_uart.h"
#include
#include
#include
 
#include "stdlib.h"

#include "davincievm.h"


#include "string.h"

 
 
void main( void )
｛
 
uint32 i;
uint32 jj；
 
unsigned char add_regI2c=0、I2C_len=0、I2C_SLAddr、cntRD；
 
DAVINCIEVM_GPIO_init()；
 
 PINMUX0 &=0xffffff7fE0；
 
 DAVINCIEVM_GPIO_setDirection (12、0)；
 DAVINCIEVM_GPIO_setOutput (12、1)；
 
   
 
  PINMUX1 &=0xffffff7f；
  PINMUX1 |=0x00000080；
  DAVINCIEVM_I2C_RESET()；
 
    add_regI2c=0x03；
    //I2C_len = 0x02；
    //I2C_SLAddr = 0xA2；
    while (1)
    ｛
     DAVINCIEVM_I2C_WRITE (0xA2、&ADD_regI2c、1)；  //发送从地址(0xA2、后跟一个字节数据、即 PCA2129的第二个寄存器(0x03H)的地址
     
     DAVINCIEVM_I2C_READ (0xA3、&RDsec、0x01)；    //从 PCA2129的第二个寄存器(0x03H)只读取一个字节  

 
    cntRD++；
    ｝
｝
 
//注：请参阅 PCA2129的已缓存数据表第56页上的 PCA2129 I2C 协议
 
 
 
 
//将以下文件添加为头文件/源文件/include 文件
 
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/*
 * Copyright 2005 by Spectrum Digital Incorporated。
 * 保留所有权利。 Spectrum Digital Incorporated 的财产。
 *
 * 不可分发。
 *
 
/*
 * I2C 实现
 *
 *
 
#include "davincievm_i2c.h"
 
/*---------------------------------------------- *
 *                                                                         *
 * DAVINCIEVM_I2C_INIT()                                                 *
 *                                                                         *
 *     启用并初始化 I2C 模块                                *
 *                                                                         *
 *     I2C 时钟设置为以20KHz 运行                                *
 *                                                                         *
 ＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊ *
int16 DAVINCIEVM_I2C_init()
｛
   #ifdef ARM_SIDE
 
       CSL_Status 状态；
       CSL_I2cClkSetup i2c_clksetup；
       CSL_I2cHwSetup i2c_hwsetup；
       CSL_I2cParam   i2c_param；
 
       CSL_i2cInit(0)；
       I2C_Handle = CSL_i2cOpen (&i2c_obj、0、&i2c_param、&status)；
 
       I2C_clksetup.prescalar     = 26；
       I2C_clksetup.clklowdiv     = 20；
       i2C_clksetup.clkhighdiv    = 20；
 
       I2C_hwsetup.mode           = 1；   // 0：从模式       1：主模式
       I2C_hwsetup.dir            = 0；   // 0：Rx 模式          1：TX 模式
       I2C_hwsetup.addrMode       = 0；   // 0：7位模式       1：10位模式//0
       I2C_hwsetup.sttbyteen      = 0；   // 0：正常模式      1：起始字节模式//0
       I2C_hwsetup.ownaddr        = 1；   //#：自有地址//0
       I2C_hwsetup.ackMode        = 0；   // 0：ACK 模式         1：NACK 模式
       i2c_hwsetup.runMode        = 0；   // 0：无自由运行模式 1：自由运行模式//
       I2C_hwsetup.repeMode     = 0；   // 0：无重复模式   1：重复模式
       I2C_hwsetup.loopBackMode   = 0；   // 0：无环回      1：环回模式//0
       i2c_hwsetup.freeDataFormat = 0；   // 0：无可用数据 fmt 1：免费数据 fmt
       I2C_hwsetup.resetMode      = 1；   // 0：复位            1：超出复位范围//0
       I2C_hwsetup.bcm            = 0；   // 0：不兼容   1：兼容
       i2c_hwsetup.inten          = 0；   //#：INTR 使能掩码
       i2C_hwsetup.clksetup       =&i2c_clksetup；
 
       status = CSL_i2cHwSetup( i2c_handle，&i2c_hwsetup )；
 
       CSL_i2cHwControl (i2c_handle、CSL_I2C_CMD_OUTOFRESET，0)；
       返回0；
 
   #Elif DSP_Side
 
       I2C_ICMDR  = 0；                   //复位 I2C
       I2C_ICPSC  = 26；                  //配置27MHz 的预分频器
       I2C_ICCLKL = 5；                   //针对50kHz 配置 clk 为低电平
       I2C_ICCLKH = 5；                   //针对50kHz 配置 clk 为高电平
       I2C_ICMDR |= ICMDR_IRS；           //从复位状态释放 I2C
       返回0；
 
   #endif
｝
 
/*---------------------------------------------- *
 *                                                                         *
 * DAVINCIEVM_I2C_CLOSE ()                                                *
 *                                                                         *
 ＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊ *
Int16 DAVINCIEVM_I2C_CLOSE ()
｛
   #ifdef ARM_SIDE
 
       cSL_i2cHwControl (i2c_handle、cSL_I2C_CMD_RESET、0)；
       cSL_i2cClose (i2c_handle)；
       返回0；
 
   #Elif DSP_Side
 
       I2C_ICMDR = 0；                     //复位 I2C
       返回0；
 
   #endif
｝
 
/*---------------------------------------------- *
 *                                                                         *
 * DAVINCIEVM_I2C_RESET()                                                *
 *                                                                         *
 *                                                                         *
 *                                                                         *
 ＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊ *
Int16 DAVINCIEVM_I2C_RESET()
｛
   DAVINCIEVM_I2C_CLOSE ()；
   DAVINCIEVM_I2C_INIT()；
   返回0；
｝
 
/*---------------------------------------------- *
 *                                                                         *
 * DAVINCIEVM_I2C_WRITE( i2addr、data、len )                             *
 *                                                                         *
 *     主模式下的 I2C 写入                                           *
 *                                                                         *
 *     i2addr <- I2C 从器件地址                                       *
 *     data   <- I2C data ptr                                            *
 *     len    <-要写入的字节数                                     *
 *                                                                         *
 ＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊ *
int16 DAVINCIEVM_I2C_write( uint16 i2caddr、uint8* data、uint16 len )
｛
   uint16 i；
   Int32超时  = 0x20000；
   Int32 TimeCount = 0；
 
   #ifdef ARM_SIDE
 
       uint16响应；
 
       cSL_i2cHwControl (i2c_handle、cSL_I2C_CMD_SET_DATA_COUNT、&len)；
       cSL_i2cHwControl (i2c_handle、cSL_I2C_CMD_SET_SLAVE_ADDR、&i2cadr)；
       cSL_i2cHwControl (i2c_handle、cSL_I2C_CMD_DIR_transmit、0)；
       cSL_i2cHwControl (i2c_handle、cSL_I2C_CMD_start、0)；
 
       DAVINCIEVM_WAIT (10)；
 
       for (i = 0；i < len；i++)
       ｛
           cSL_i2cWrite (i2c_handle、&data[i])；
 
           TimeCount = 0；
           操作
           ｛
               cSL_i2cGetHwStatus (i2c_handle、cSL_I2C_query_TX_RDY、&Response)；
 
               TimeCount++；
               如果(TimeCount >= timeout)
               ｛
                   DAVINCIEVM_I2C_RESET()；
                   退货1000；
               ｝
 
           } while (response =0)；
       ｝
 
     //CSL_i2cHwControl (i2c_handle、CSL_I2C_CMD_stop、0)；
 
       返回0；
 
   #Elif DSP_Side
 
       I2C_ICCNT = len；                   //设置 len
       I2C_ICSAR = i2addr；               //设置 I2C 从器件地址
       I2C_ICMDR = ICMDR_STT              //配置主设备写入
                 | ICMDR_TRX
                 | ICMDR_MST
                 | ICMDR_IRS
                 | ICMDR_FREE
                 ；
 
       DAVINCIEVM_WAIT( 10)；             //短延迟
 
       for (i = 0；i < len；i++)
       ｛
           I2C_ICDXR = DATA[i]；           //写入
 
           TimeCount = 0；
           操作
           ｛
               TimeCount++；
               如果(TimeCount >= timeout)
               ｛
                   DAVINCIEVM_I2C_RESET()；
                   退货1000；
               ｝
           } while ((I2C_ICSTR & ICSTR_ICXRDY)=0)；//等待 Tx 就绪
       ｝
 
       I2C_ICMDR |= ICMDR_STP；            //生成停止
       返回0；
 
   #endif
｝
 
/*---------------------------------------------- *
 *                                                                         *
 * DAVINCIEVM_I2C_READ( i2addr、data、len )                              *
 *                                                                         *
 *     主模式下的 I2C 读取                                            *
 *                                                                         *
 *     i2addr <- I2C 从器件地址                                       *
 *     data   <- I2C data ptr                                            *
 *     len    <-要写入的字节数                                     *
 *                                                                         *
 ＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊ *
int16 DAVINCIEVM_I2C_READ( uint16 i2caddr、uint8* data、uint16 len )
｛
   uint16 i；
   Int32超时  = 0x20000；
   Int32 TimeCount = 0；
 
   #ifdef ARM_SIDE
 
       uint16响应；
 
       cSL_i2cHwControl (i2c_handle、cSL_I2C_CMD_SET_DATA_COUNT、&len)；
       cSL_i2cHwControl (i2c_handle、cSL_I2C_CMD_SET_SLAVE_ADDR、&i2cadr)；
       cSL_i2cHwControl (i2c_handle、cSL_I2C_CMD_DIR_Receive、0)；
       cSL_i2cHwControl (i2c_handle、cSL_I2C_CMD_start、0)；
 
       DAVINCIEVM_WAIT (10)；
 
       for (i = 0；i < len；i++)
       ｛
           TimeCount = 0；
           操作
           ｛
               cSL_i2cGetHwStatus (i2c_handle、cSL_I2C_query_RX_RDY、&Response)；
 
               TimeCount++；
               如果(TimeCount >= timeout)
               ｛
                   DAVINCIEVM_I2C_RESET()；
                   退货1000；
               ｝
 
           } while (response =0)；
 
           cSL_i2cRead (i2c_handle，&data[i])；
       ｝
 
     //CSL_i2cHwControl (i2c_handle、CSL_I2C_CMD_stop、0)；
 
       返回0；
 
   #Elif DSP_Side
 
       I2C_ICCNT = len；                   //设置 len
       I2C_ICSAR = i2addr；               //设置 I2C 从器件地址
       I2C_ICMDR = ICMDR_STT              //配置为主器件读取
                 | ICMDR_MST
                 | ICMDR_IRS
                 | ICMDR_FREE
                 ；
 
       for (i = 0；i < len；i++)
       ｛
           TimeCount = 0；
           操作
           ｛
               TimeCount++；
               如果(TimeCount >= timeout)
               ｛
                   DAVINCIEVM_I2C_RESET()；
                   退货1000；
               ｝
           } while (( I2C_ICSTR & ICSTR_ICRDY )=0)；//等待 Rx 就绪
           DATA[i]= I2C_ICDRR；           //读取
       ｝
 
       I2C_ICMDR |= ICMDR_STP；            //生成停止
       返回0；
 
   #endif
｝
 
/*---------------------------------------------- *
 *                                                                         *
 * DAVINCIEVM_I2C_READ_variable (i2addr、data、len)                     *
 *                                                                         *
 *     主模式下的 I2C 读取                                            *
 *                                                                         *
 *     i2addr <- I2C 从器件地址                                       *
 *     data   <- I2C data ptr                                            *
 *     len    <-要写入的字节数                                     *
 *                                                                         *
 ＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊ *
int16 DAVINCIEVM_I2C_READ_variable (uint16 i2caddr、uint8* data、uint16 len)
｛
   uint16 i；
   Int32超时  = 0x20000；
   Int32 TimeCount = 0；
 
   #ifdef ARM_SIDE
 
       uint16响应；
 
       cSL_i2cHwControl (i2c_handle、cSL_I2C_CMD_SET_DATA_COUNT、&len)；
       cSL_i2cHwControl (i2c_handle、cSL_I2C_CMD_SET_SLAVE_ADDR、&i2cadr)；
       cSL_i2cHwControl (i2c_handle、cSL_I2C_CMD_DIR_Receive、0)；
       cSL_i2cHwControl (i2c_handle、cSL_I2C_CMD_start、0)；
 
       DAVINCIEVM_WAIT (10)；
 
       for (i = 0；i < len；i++)
       ｛
           如果(i ==1)
           ｛
               len =数据[0]；
               cSL_i2cHwControl (i2c_handle、cSL_I2C_CMD_SET_DATA_COUNT、&len)；
           ｝
 
           TimeCount = 0；
           操作
           ｛
               cSL_i2cGetHwStatus (i2c_handle、cSL_I2C_query_RX_RDY、&Response)；
 
               TimeCount++；
               如果(TimeCount >= timeout)
               ｛
                   DAVINCIEVM_I2C_RESET()；
                   退货1000；
               ｝
 
           } while (response =0)；
 
           cSL_i2cRead (i2c_handle，&data[i])；
       ｝
 
     //CSL_i2cHwControl (i2c_handle、CSL_I2C_CMD_stop、0)；
 
       返回0；
 
   #Elif DSP_Side
 
       I2C_ICCNT = len；                   //设置 len
       I2C_ICSAR = i2addr；               //设置 I2C 从器件地址
       I2C_ICMDR = ICMDR_STT              //配置为主器件读取
                 | ICMDR_MST
                 | ICMDR_IRS
                 | ICMDR_FREE
                 ；
 
       for (i = 0；i < len；i++)
       ｛
           如果(i ==1)
           ｛
               len =数据[0]；
               I2C_ICCNT = len；           //设置 len
           ｝
 
           TimeCount = 0；
           操作
           ｛
               TimeCount++；
               如果(TimeCount >= timeout)
               ｛
                   DAVINCIEVM_I2C_RESET()；
                   退货1000；
               ｝
           } while (( I2C_ICSTR & ICSTR_ICRDY )=0)；//等待 Rx 就绪
           DATA[i]= I2C_ICDRR；           //读取
       ｝
 
       I2C_ICMDR |= ICMDR_STP；            //生成停止
       返回0；
 
   #endif
｝
 
 
 
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
 
 
/*
 * Copyright 2005 by Spectrum Digital Incorporated。
 * 保留所有权利。 Spectrum Digital Incorporated 的财产。
 *
 * 不可分发。
 *
 
/*
 * I2C 头文件
 *
 *
 
ifndef I2C_
#define I2C_
 
#include "davincievm.h"
 
#ifdef ARM_SIDE
 
   #include "cSL_i2c.h"
   静态 CSL_I2cHandle i2c_handle；
   静态 CSL_I2cObj   i2c_obj；
 
#Elif DSP_Side
 
#endif
 
/*---------------------------------------------- *
 *                                                                         *
 * I2C 原型                                                         *
 *                                                                         *
 ＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊ *
int16 DAVINCIEVM_I2C_init ()；
int16 DAVINCIEVM_I2C_CLOSE ()；
int16 DAVINCIEVM_I2C_WRITE( uint16 slaveaddr、uint8* data、uint16 len )；
int16 DAVINCIEVM_I2C_READ ( uint16 slaveaddr、uint8* data、uint16 len )；
 
#endif
 
 
  
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//在 include EX：csl_i2c.h 等中添加了更多与 I2C 相关的头文件

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

代码中仅启用写入功能的波形如下所示：(从地址0xA2 和数据0x03不匹配！)

代码中仅启用读取功能的波形如下所示：(从地址0xA2 和数据0x03不匹配！)

//使用中的原理图：

数据上拉、CLK 线为0.9K 、VCC=1.8V

建议您尽快提问。

  

此致

Sanjay Kumar Singh
经理。
Crypto & Datacom、C-D&E、
Bharat Electronics Ltd.
Bangalore -560013。
PH：+91-80-22195844 

你好、Pavel、我仍然没有从你提供的链接中得到任何回复。

请按以下方式回答有关 I2C 的一般性问题：

ADD_regI2c[0]= 0x0F；

add_regI2c[1]=0x06；

DAVINCIEVM_I2C_WRITE (0x51、&add_regI2c[0]、0x02)；

上述指令不会发出有效的停止波形！！！

请告诉我们达芬奇 ARM 不是什么原因

是否发出正确的停止？