get data from l3g4200d by used arm micro(at91sam7x)

mohammadesmaili

i have tried to get data from l3g4200d with using arm micro(at91sam7x256) by spi protocol .but i could not yet.is anyone can help me?

Franklin

What are your problems? How do you have it hooked up and what code are you using? Details please.

mohammadesmaili

i can write data to sensor but i cant read.can you give me a sample code or library that i can used for my code .
# 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<<18);
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<<18);
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;



}
}

mohammadesmaili

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 up.