TMS320VC5509驱动AT24C02

1. 刚开始的波形不太对，比如如下代码

        i2c_status = I2C_write( at24c02_write_buf,          //pointer to data array
                                ,                //length of data to be transmitted
                                ,                //master or slaver
                                0x78,        //slave address to transmit to
                                ,                //transfer mode of operation
                                            //time out for bus busy
                                );

但是实际的波形是，把0x78左移了一位，我估计是DSP5509会自动在最后一位加上读写位

所以本次AT24C02的地址是0XA0，那么实际写的应该是0x50

        i2c_status = I2C_write( at24c02_write_buf,          //pointer to data array
                                ,                //length of data to be transmitted
                                ,                //master or slaver
                                0x50,        //slave address to transmit to
                                ,                //transfer mode of operation
                                            //time out for bus busy
                                );

2. 最后的综合代码如下

#include <csl.h>
#include <csl_i2c.h>
#include <stdio.h>
#include <csl_pll.h>
#include <csl_gpio.h>

#define BUF_LEN 20
#define AT24C02_WRITE_ADDR  0x50
#define AT24C02_READ_ADDR  0X50

Uint16 i2c_status;

/*锁相环的设置*/
PLL_Config  myConfig      = {
  ,    //IAI: the PLL locks using the same process that was underway
                //before the idle mode was entered
  ,    //IOB: If the PLL indicates a break in the phase lock,
                //it switches to its bypass mode and restarts the PLL phase-locking
                //sequence
  ,    //PLL multiply value; multiply 24 times
               //Divide by 2 PLL divide value; it can be either PLL divide value
                //(when PLL is enabled), or Bypass-mode divide value
                //(PLL in bypass mode, if PLL multiply value is set to 1)
};

/* This next struct shows how to use the I2C API */
/* Create and initialize an I2C initialization structure */
I2C_Setup I2Cinit = {
        ,              /* 7 bit address mode */
        ,         /* own address - don't care if master */
        ,            /* clkout value (Mhz)  */
        ,            /* a number between 10 and 400*/
        ,              /* number of bits/byte to be received or transmitted (8)*/
        ,              /* DLB mode on*/
                       /* FREE mode of operation on*/
};

Uint16 at24c02_write_buf[] ={0x00,0x00,0x00};
Uint16 test_write_buf[BUF_LEN+] = {};
I2C_Config testI2C;

void delay(Uint32 k)
{
   while(k--);
}

void main(void)
{
    unsigned char i= ;
    i2c_status = ;
    /*初始化CSL库*/
    CSL_init();

    /*设置系统的运行速度为140MHz*/
    PLL_config(&myConfig);

    /*确定方向为输出*/
    GPIO_RSET(IODIR,0xFF);
    GPIO_RSET(IODATA,0x00);

    /*I2C is undet reset*/
    I2C_RSET(I2CMDR,);
    /*设置预分频寄存器,I2C的mode clock is 10MHz*/
    delay();
    I2C_RSET(I2CSAR,0x001A);
    I2C_RSET(I2CMDR,0x0620);

    I2C_setup(&I2Cinit);
    /*设置Ｉ２Ｃ的Mater clock*/
    I2C_RSET(I2CCLKL,);
    I2C_RSET(I2CCLKH,);

    I2C_getConfig(&testI2C);

    //
    for(i=;i<BUF_LEN;i++)
    {
        at24c02_write_buf[] = i;
        at24c02_write_buf[] = +i;
        i2c_status = I2C_write( at24c02_write_buf,          //pointer to data array
                                ,                //length of data to be transmitted
                                ,                //master or slaver
                                AT24C02_WRITE_ADDR,        //slave address to transmit to
                                ,                //transfer mode of operation
                                            //time out for bus busy
                                );
        delay();
    }

    for(i=;i<BUF_LEN;i++)
    {
        at24c02_write_buf[] = i;
        at24c02_write_buf[] = ;
        test_write_buf[i] = ;
        i2c_status = I2C_write( at24c02_write_buf,          //pointer to data array
                                ,                //length of data to be transmitted
                                ,                //master or slaver
                                AT24C02_WRITE_ADDR,        //slave address to transmit to
                                ,                //transfer mode of operation
                                            //time out for bus busy
                                );

        i2c_status = I2C_read( &(test_write_buf[i]),          //pointer to data array
                                ,                //length of data to be transmitted
                                ,                //master or slaver
                                AT24C02_READ_ADDR,        //slave address to transmit to
                                ,                //transfer mode of operation
                                ,            //time out for bus busy

                                );
        delay();
    }

    while();
}

3. 看下仿真的结果

4. 看下写数据的波形

读数据的波形