get data from l3g4200d by used arm micro(at91sam7x)

Development Boards MicroMod
1

I would connect a l3g4200d to a arm(at91sam7x256) using SPI connection.

But i dont find in what do I have to send to the sensor to receive true data.

So i think i just don’t send the write data to my sensors .the sample code i have used peresent at bellow

include <AT91SAM7X256.H>

int main(void)

{

int i;

float a;

AT91C_BASE_WDTC->WDTC_WDMR=AT91C_WDTC_WDDIS;

AT91C_BASE_RSTC->RSTC_RMR=0xA5000001;

//----------------------------------------------------SPEED UP-----------------------------

AT91C_BASE_CKGR->CKGR_MOR=0xF01;

AT91C_BASE_CKGR->CKGR_PLLR=0x2903FFC;

AT91C_BASE_PMC->PMC_MCKR=0x3;

AT91C_BASE_PMC->PMC_SCER=0x1;

//------------------------------------------------------------------------------------

AT91C_BASE_PMC->PMC_PCER=(1<<AT91C_ID_PIOA);

AT91C_BASE_PMC->PMC_PCER=(1<<AT91C_ID_SPI0);

//------------------------------------------------------------------------Enable Multiplexing on PIO Controller A-------------------------------------

AT91C_BASE_PIOA->PIO_PDR=(1<<12|1<<13|1<<14|1<<15|1<<16|1<<17|1<<1 8);

AT91C_BASE_PIOA->PIO_MDER=(1<<12|1<<13|1<<14|1<<15|1<<16|1<<17|1<< 18);

AT91C_BASE_PIOA->PIO_ASR=(1<<12|1<<13|1<<14|1<<15|1<<16|1<<17|1<<1 8);

AT91C_BASE_PIOA->PIO_PPUER=(1<<12|1<<13|1<<14|1<<15|1<<16|1<<17|1< <18);

//-----------------------------------------------------------------------configure spi register---------------------------------------------------------------

AT91C_BASE_SPI0->SPI_MR=0x0F000001;

AT91C_BASE_SPI0->SPI_CSR[0]=0x0F0FFF81;

//------------------------------------------------------------------------enable spi-----------------------------------

AT91C_BASE_SPI0->SPI_CR=0x1;

//-----------------------------------------------------------------------configure sensors registers(CTRl_ReG1 to CTRL_REG5)------------------------------------------------------------------

while(!(AT91C_BASE_SPI0->SPI_SR&0x2));

AT91C_BASE_SPI0->SPI_TDR=0x0F80;

AT91C_BASE_SPI0->SPI_TDR=0x1E80;

while(!(AT91C_BASE_SPI0->SPI_SR&0x2));

AT91C_BASE_SPI0->SPI_TDR=0x0084;

while(!(AT91C_BASE_SPI0->SPI_SR&0x2));

AT91C_BASE_SPI0->SPI_TDR=0x0088;

while(!(AT91C_BASE_SPI0->SPI_SR&0x2));

AT91C_BASE_SPI0->SPI_TDR=0x008C;

while(!(AT91C_BASE_SPI0->SPI_SR&0x2));

AT91C_BASE_SPI0->SPI_TDR=0x0090;

while(1)

{

//------------------------------------------------------------reading data from sensor register----------------------------------------

while(!(AT91C_BASE_SPI0->SPI_SR&0x2));

AT91C_BASE_SPI0->SPI_TDR=0x3D;

while(!(AT91C_BASE_SPI0->SPI_SR&0x1));

a=AT91C_BASE_SPI0->SPI_RDR&0xFFFF;

}

}