Library for MMA7660FC Accelerometer device
Dependents: TestCode_MMA7660FC 3D_Accelerometer_Tester RTOS-aap-board-modules embed_Grove_3-Axis_Digital_Accelerometer ... more
Revision 4:6e931d9bbf4b, committed 2012-07-04
- Comitter:
- edodm85
- Date:
- Wed Jul 04 20:20:27 2012 +0000
- Parent:
- 3:df25c72e16be
- Child:
- 5:d2f90c0be13f
- Commit message:
- Rev 5
Changed in this revision
MMA7660FC.cpp | Show annotated file Show diff for this revision Revisions of this file |
MMA7660FC.h | Show annotated file Show diff for this revision Revisions of this file |
--- a/MMA7660FC.cpp Tue Jul 03 18:37:19 2012 +0000 +++ b/MMA7660FC.cpp Wed Jul 04 20:20:27 2012 +0000 @@ -33,6 +33,10 @@ #define PD_STATUS 0xA // Tap/Pulse Debounce Count Register (Read/Write) +float TILT_XY[64] = {0, 2.69, 5.38, 8.08, 10.81, 13.55, 16.33, 19.16, 22.02, 24.95, 27.95, 31.04, 34.23, 37.54, 41.01, 44.68, 48.59, 52.83, 57.54, 62.95, 69.64, 79.86, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -79.86, -69.64, -62.95, -57.54, -52.83, -48.59, -44.68, -41.01, -37.54, -34.23, -31.04, -27.95, -24.95, -22.02, -19.16, -16.33, -13.55, -10.81, -8.08, -5.38, -2.69}; +float TILT_Z[64] = {90.00, 87.31, 84.62, 81.92, 79.19, 76.45, 73.67, 70.84, 67.98, 65.05, 62.05, 58.96, 55.77, 52.46, 48.99, 45.32, 41.41, 37.17, 32.46, 27.05, 20.36, 10.14, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -10.14, -20.36, -27.05, -32.46, -37.17, -41.41, -45.32, -48.99, -52.46, -55.77, -58.96, -62.05, -65.05, -67.98, -70.84, -73.67, -76.45, -79.19, -81.92, -84.62}; + + // Connect module at I2C address addr using I2C port pins sda and scl MMA7660FC::MMA7660FC(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr) @@ -59,8 +63,8 @@ } - // Reads X, Y, Z data -void MMA7660FC::read_g(int *x, int *y, int *z) + // Reads the tilt angle +void MMA7660FC::read_Tilt(float *x, float *y, float *z) { const char Addr_X = OUT_X; @@ -69,9 +73,10 @@ m_i2c.write(m_addr, &Addr_X, 1); // Pointer to the OUT_X register m_i2c.read(m_addr, buf, 3); // Read register content into buffer with 6bit - *x = buf[0]; - *y = buf[1]; - *z = buf[2]; + // returns the x, y, z coordinates transformed into full degrees + *x = TILT_XY[buf[0]]; + *y = TILT_XY[buf[1]]; + *z = TILT_Z[buf[2]]; }
--- a/MMA7660FC.h Tue Jul 03 18:37:19 2012 +0000 +++ b/MMA7660FC.h Wed Jul 04 20:20:27 2012 +0000 @@ -42,10 +42,10 @@ * while(1) * { * int x=0, y=0, z=0; - * Acc.read_g(&x, &y, &z); - * pc.printf("x: \n", x); - * pc.printf("x: \n", y); - * pc.printf("x: \n", z); + * Acc.read_Tilt(&x, &y, &z); + * pc.printf("Tilt x: %2.2f degree \n", x); // Print the tilt orientation of the X axis + * pc.printf("Tilt y: %2.2f degree \n", y); // Print the tilt orientation of the Y axis + * pc.printf("Tilt z: %2.2f degree \n", z); // Print the tilt orientation of the Z axis * wait(1); * } * } @@ -74,13 +74,13 @@ */ void init(); - /** Read the x,y,z axis acceleration and return a 6bit unsigned data + /** Read the Tilt Angle using Three Axis * - * @param *x Value of X acceleration - * @param *y Value of Y acceleration - * @param *z Value of Z acceleration + * @param *x Value of x tilt + * @param *y Value of y tilt + * @param *z Value of z tilt */ - void read_g(int *x, int *y, int *z); + void read_Tilt(float *x, float *y, float *z); /** Read the x register of the MMA7660FC * @@ -98,7 +98,7 @@ * * @returns The value of z acceleration */ - float read_z(); + float read_z(); /** Read from specified MMA7660FC register *