Pni RM3000-F Sensor Suite Instrukcja Użytkownika Pobierz pdf (Strona 45)

PNI Sensor Corporation Doc #1016102 r04

RM3000-f & RM2000-f Sensor Suite User Manual Page 45

/*************************************************************************

* Function Name : ThreeD_magic_init

* Description : initializes the 3D MagIC.

* Input : None

* Output : None

* Return : None

*************************************************************************/

void ThreeD_magic_init(void)

{

unsigned char i;

unsigned int cycle_count = 200;

unsigned int cycle_count_read_back[3];

// change the phase and polarity to be 1/1

spi_1_go_0_phase_0_pol();

//Set Cycle Count HERE

usec_delay(1);

SPI_tom_CS_LOW();

usec_delay(1);

//Write Cycle Count Reg, start at X-axis, auto increment to Y & Z

SPI_read_write(0x83);

//CC is programmed as 200 for now.

for(i=0;i<3;i++)

{

usec_delay(1);

SPI_read_write((unsigned char)(cycle_count>>8));

usec_delay(1);

SPI_read_write((unsigned char)cycle_count));

}

SPI_tom_CS_HIGH();

//Read CC

usec_delay(1);

SPI_tom_CS_LOW();

usec_delay(1);

//Optional-Read Cycle Count Reg, start at X-axis, auto increment to Y&Z

//for verification purpose only.

SPI_read_write(0xc3);

for(i=0;i<3;i++)

{

usec_delay(1);

cycle_count_read_back[i]=(SPI_read_write(0)<<8);

usec_delay(1);

cycle_count_read_back[i]|=SPI_read_write(0);

}

SPI_tom_CS_HIGH();

// change the phase and polarity to be 1/1

spi_1_go_1_phase_1_pol();

}

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