Arduinomaple驱动MMA7660例程.doc

Arduino/maple驱动MMA7660例程
2011-07-30 10:15
Arduino/maple驱动MMA7660例程
【整理者】
【提供者】yuyyy
【详细说明】Arduino/maple驱动MMA7660例程
我们是深圳本土最受客户青睐、成长最快、最关注增值服务的MID电子元件提供商之一。我们深圳的长期大量现货型号有：MMA7660, MMA7455, MMA8452QR1, MXC6225XU, MMC3140MS, TS1003,MPU-3050, ALC5621, ALC5625, WM8988, ES8388，联系热线：13714686590，杨先生

//SDA (data line) is on  pin 30, and SCL (clock line) is on  pin 29

#include <Wire.h>

#define I2C_ADDRESS 0x4C
#define I2C_ADDRESS_W 0x99 //MMA7660 Address + 1 bit (Write) pag. 21
#define I2C_ADDRESS_R 0x98 //MMA7660 Address + 0 bit (Read) pag 21
#define TILT_STATUS 0x03
#define SRST 0x04
#define SPCNT 0x05
#define INTSU 0x06
#define MODE 0x07
#define SR 0x08
#define PDET 0x09
#define PD 0x0A

#define POWER_UP_DELAY 10

#define X_OUT 0x00
#define Y_OUT 0x01
#define Z_OUT 0x02

void setup()
{
  SerialUSB.println("Setting up I2C protocol...");
  Wire.begin(30,29);
  SLAVE_I2C_INIT();
  pinMode(13, OUTPUT);
}

void loop()
{
  char x = SLAVE_I2C_READ(X_OUT);
  char y = SLAVE_I2C_READ(Y_OUT);
  char z = SLAVE_I2C_READ(Z_OUT);
  char mode = SLAVE_I2C_READ(0x07);
// char tilt = SLAVE_I2C_READ(0x03);
  char sample = SLAVE_I2C_READ(0x04);
// char fac = SLAVE_I2C_READ(0x0B);

  SerialUSB.print("X=");
  SerialUSB.print(x, DEC);
  SerialUSB.print(", Y=");
  SerialUSB.print(y, DEC);
  SerialUSB.print(", Z=");
  SerialUSB.print(z, DEC);
  SerialUSB.print(", Mode=");
  SerialUSB.print(mode,DEC);
  //Serial.print(", Tilt=");
// Serial.print(tilt,DEC);
  SerialUSB.print(", sample=");
  SerialUSB.print(sample,DEC);
  //Serial.print(", fac=");
  //Serial.print(fac,DEC);
  SerialUSB.println(".");
  delay(100);

}
void SLAVE_I2C_INIT()
{

  SerialUSB.println("Powering up SLAVE interface...");
  delay(POWER_UP_DELAY);

  SLAVE_I2C_SEND(MODE,0x00); // Setting up MODE to Stand by to set SR
  delay(100);

  SLAVE_I2C_SEND(SR,0x00);  // Setting up SR register to 120 samples active and auto sleep mode
  delay(100);

  SLAVE_I2C_SEND(MODE,0x01); //Setting up MODE Active to START measures
  delay(100);

}

void SLAVE_I2C_SEND(unsigned char REG_ADDRESS, unsigned  char DATA)  //SEND data to MMA7660
{
  Wire.beginTransmission(I2C_ADDRESS);
  Wire.send(REG_ADDRESS);
  Wire.send(DATA);
  Wire.endTransmission();
}

unsigned char SLAVE_I2C_READ(unsigned char REG_ADDRESS) //READ MMA7660 data
{
  unsigned char R_VALUE;
  Wire.beginTransmission(I2C_ADDRESS);
  Wire.send(REG_ADDRESS);  // register to read
  Wire.endTransmission();

  Wire.requestFrom(I2C_ADDRESS, 1); // read a byte
  while(!Wire.available())
  {
    digitalWrite(13, HIGH);
    delay(100);
    digitalWrite(13, LOW);
    delay(100);
  }

  R_VALUE = Wire.receive();
  return R_VALUE;
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