basic i2c

[ahmad]

Posted on June 29, 2006 at 14:05

basic i2c

[ahmad]

Posted on June 29, 2006 at 09:29

hi,

i'm a student currently working with STR712FR2. I'm trying to use I2C and have basically wrote a simple code to check the signal out from it. it compiles well and didnt gave any error but the problem is i couldnt detect any signal using oscilloscope. anybody can help me with this?

heres my code

#include ''71x_lib.h''

#include ''i2c.h''

int main (void)

{

u32 MCLK_Freq;

#ifdef DEBUG

debug();

#endif

/* Configure the SDA and the SCL lines to alternate functions Open Drain (MASTERS) */

GPIO_Config(GPIO1,0x2000,GPIO_AF_OD);

GPIO_Config(GPIO1,0x4000,GPIO_AF_OD);

/* Initialize the I2C0 peripheral */

I2C_Init (I2C0);

/* Configure frequency bits */

I2C_FCLKConfig (I2C0);

/* Enable I2C0 peripheral */

I2C_OnOffConfig (I2C0, ENABLE);

/*compute internal RCCU value*/

MCLK_Freq = RCCU_FrequencyValue(RCCU_MCLK);

/* Configure I2C0 clock speed */

I2C_SpeedConfig (I2C0, 100000);

/* Enable Acknowledge */

I2C_AcknowledgeConfig (I2C0, ENABLE);

/* Generate the START condition */

I2C_STARTGenerate (I2C0, ENABLE);

/* Wait until SB bit is set */

while (I2C_FlagStatus (I2C0, DIRECT, I2C_SB)==RESET);

while(1){

I2C_ByteSend (I2C0,0X03);

}

thanx

[ahmad]

Posted on June 29, 2006 at 11:40

hi,

i'm using raisonance Reva starter kit.

maybe this sound a bit stupid. whats a PU? is it a jumper that you put with the SCL & SDA pin. if then so, ive done that.

thanks

[ahmad]

Posted on June 29, 2006 at 14:05

hi again,

well, ihave PU on the SDA and SCL and still it didnt give me any I2C signal. well the code looks correct to me. am i missing something ?

thanks