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[SENSOR]/기타센서2009. 6. 8. 12:49

[HMC6352] 지자기 센서 모듈 제작

[HMC6352] 지자기 센서 모듈 제작

테스트 동영상
")//]]> Cortex-M3 STM32 USB를 이용하여 각도값 표시

Posted by nexp

TAG compass, HMC6352

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lee

안녕하세요 궁금한게 있어서 그런데 3축으로 지자기값을 측정해서 각도값을

구하는 공식좀 알수 있을련지요..가르쳐주시면 감사하겠습니다
2009.09.10 00:10 [ ADDR : EDIT/ DEL : REPLY ]

[SENSOR]/기타센서2009. 3. 22. 19:36

[SCP1000-D01] 압력센서 테스트

[SCP1000-D01] 압력센서 테스트

테스트 동영상
SCP1000-D01 압력센서를 이용하여 바닥에서(설정값) 고도에 대한 차이값을 표시

압력값의 표시는 지난번 제작해 두었던 SPI제어 FND모듈 이용하여 압력의 차이값표시를 간단하게 했다.

FND모듈 핀맵

엘리베이터 1~5층 까지 압력 측정 데이터

SCP1000 예제 소스코드 (AVR Mega128)

void Write_Direct_Access_SPI(unsigned char address, unsigned char data)
{
address = (address << 2); // #1, shift the SCP1000 reg address to left by 2
address |= 0x02; // #2, set write bit to one (RW=1)

//set CSB to low
PRESSURE_CS_ASSERT();

// #4, write register address byte (8bits)
SPI0_WriteByte(address);

// #5, write data byte (8bit) to line
SPI0_WriteByte(data);

// Set CSB to HIGH
PRESSURE_CS_DEASSERT();
}

unsigned int Read_Direct_Access_SPI(unsigned char address, unsigned char number_of_bytes)
{
unsigned int value;
value = 0;
address = (address << 2); //shift the SCP1000 reg address to left by 2

PRESSURE_CS_ASSERT();

//write register address byte (8bits)
SPI0_WriteByte(address);

while(number_of_bytes-- > 0)
{
  value <<= 8;
  // Read data byte from MCU SPI register
  value |= SPI0_WriteReadByte(0);
}

// Set CSB to HIGH
PRESSURE_CS_DEASSERT();
return value;
}

unsigned int Read_Indirect_Access_SPI(unsigned char address)
{
unsigned long value;
Write_Direct_Access_SPI(0x02, address); // #1, write reg address to ADDPTR (0x02)
Write_Direct_Access_SPI(0x03, 0x01); // #2, write 0x01 to OPERATION (0x03)
Delay(10); // #3, wait 10ms
value = Read_Direct_Access_SPI(0x20, 0x02); // #4, read two bytes from DATARD16 (0x20)
return value;
}

void Write_Indirect_Access_SPI(unsigned char address, unsigned char data)
{
Write_Direct_Access_SPI(0x02, address); // #1, write reg address to ADDPTR (0x02)
Write_Direct_Access_SPI(0x01, data); // #2, write reg data to DATAWR (0x01)
Write_Direct_Access_SPI(0x03, 0x02); // #3, write 0x02 to OPERATION (0x03)
Delay(50); // #4, wait 50ms
}

void init_scp1000(void)
{
unsigned int DATA;
unsigned char i;

PRESSURE_CS_INIT();
PRESSURE_CS_DEASSERT();

SPI0_Init();
SPI0_MODE0();
SPI0_CLK_DOULBE();
SPI0_CLK_DIV128();

Delay(60); // #3, 60ms wait

DebugPrint("\r\nDATA: ");
for(i = 6; i > 0 ; i--)
{
  DATA = Read_Direct_Access_SPI(0x07, 1);// #4, read STATUS register --> LSB '0'=OK
  DebugPrint("%02X ", DATA);

  if(!(DATA & 0x0001))break;
  Delay(10);
}

if(i == 0)
{
  //fail();
  DebugPrint("\r\nSTATUS register error\r\n");
  return;
}
DebugPrint("STATUS(%d)=0x%02X\r\n", i, DATA);

DATA = Read_Direct_Access_SPI(0x1F, 1); // #5, read DATARD8 register --> LSB '1'=OK

if(!(DATA && 0x0001))
{
  //fail();
  DebugPrint("DATA(%02X) register error\r\n", DATA);
}

Write_Indirect_Access_SPI(0x2D, 0x03); // #6, Low noise configuration
Delay(100); // #7, wait for 100ms
Write_Direct_Access_SPI(0x03, 0x00); // Reset operation mode
Delay(10); // Wait before change new mode
Write_Direct_Access_SPI(0x03, 0x09);
// measurement mode (0x0A)
Delay(100);
}

unsigned short GetPressure(void)
{
unsigned long pressure;

pressure = (uint32_t)((0x0007) & Read_Direct_Access_SPI(0x1F, 1));

pressure <<= 16; // shift 3MSB bits to left by 16
pressure |= (uint32_t)Read_Direct_Access_SPI(0x20, 2);

pressure >>= 2; // Convert to [Pa] by dividing the 19 bit

DebugPrint("%ld\r\n", 0x7FFFF&pressure);
}

Posted by nexp

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choi

안녕하세요. 이 센서를 쓰고 있는 유저인데
데이터값이 제대로 잘 안나오네요
16비트 dsp28335를 쓰고있는데요

////////main.c
DSP28x_usDelay(1800000); // #.1
/*
for(i = 6; i > 0 ; i--)
{
DATA = (spi_read_Press(0x07, 1) & 0xFF);// #4, read STATUS register --> LSB '0'=OK

if(!(DATA & 0x0001))break;
DSP28x_usDelay(300000);
}

if(i == 0)
{
//SCP1000 에러
DSP28x_usDelay(10000);
return;
}
*/

spi_write_Press(0x022D);
spi_write_Press(0x0103);
spi_write_Press(0x0302);
DSP28x_usDelay(1500000);

DSP28x_usDelay(3000000);
spi_write_Press(0x0300);
DSP28x_usDelay(1200000);
spi_write_Press(0x030A);
DSP28x_usDelay(0x0309);
DSP28x_usDelay(3000000);

////////spi.c
void spi_write_Press(WORD tdata)
{
BYTE a,b;

a=tdata&0xFF00;
b=tdata&0x00FF;
a=a<<2;
GpioDataRegs.GPADAT.bit.GPIO9=0;
SpiaRegs.SPITXBUF=a;
delay_loop();
SpiaRegs.SPITXBUF=b;
GpioDataRegs.GPADAT.bit.GPIO9=1;

}

WORD spi_read_Press(BYTE tdata, BYTE type)
{
WORD rdata=0;

SpiaRegs.SPIFFRX.bit.RXFIFORESET = 0;
SpiaRegs.SPIFFRX.bit.RXFIFORESET = 1;

tdata = tdata;

GpioDataRegs.GPADAT.bit.GPIO9=0;
SpiaRegs.SPITXBUF=tdata; //tdata 2byte -> 1byte
while(type-- > 0)
{
rdata <<=8;
rdata |= SpiaRegs.SPIRXBUF;
}
GpioDataRegs.GPADAT.bit.GPIO9=1;
return rdata;
}

/////////interrupt.c

WORD temp_data=0;
WORD pressure=0;

temp_data = spi_read_Press(0x1F, 1); //Read MSB pressure data - 3 lower bits
pressure = spi_read_Press(0x20, 2);
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;

이런식으로 테스트를 하고있는데......

데이터값이 이상하게 나와요 ㅠㅠ
2010.06.30 11:52 [ ADDR : EDIT/ DEL : REPLY ]