Rev 0.1 Simple operation of just X, Y, Z values in floating point G's
Dependents: Hello_FXLS8471Q Multi-Sensor sensor AerCloud_MutliTech_Socket_Modem_Example ... more
FXLS8471Q.cpp@0:f89f2dc4b003, 2014-04-07 (annotated)
- Committer:
- JimCarver
- Date:
- Mon Apr 07 00:58:10 2014 +0000
- Revision:
- 0:f89f2dc4b003
- Child:
- 1:c80be04510fe
Rev 0.1 Simple operation of just X, Y, Z values in floating point G's
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
JimCarver | 0:f89f2dc4b003 | 1 | #include "FXLS8471Q.h" |
JimCarver | 0:f89f2dc4b003 | 2 | |
JimCarver | 0:f89f2dc4b003 | 3 | FXLS8471Q::FXLS8471Q(PinName mosi, PinName miso, PinName sck, PinName cs) : _spi(mosi, miso, sck), _spi_cs(cs) { |
JimCarver | 0:f89f2dc4b003 | 4 | _spi_cs = 1; |
JimCarver | 0:f89f2dc4b003 | 5 | wait(0.1); |
JimCarver | 0:f89f2dc4b003 | 6 | begin(); |
JimCarver | 0:f89f2dc4b003 | 7 | } |
JimCarver | 0:f89f2dc4b003 | 8 | |
JimCarver | 0:f89f2dc4b003 | 9 | |
JimCarver | 0:f89f2dc4b003 | 10 | |
JimCarver | 0:f89f2dc4b003 | 11 | void FXLS8471Q::RegWrite( int reg, int *d, int len) |
JimCarver | 0:f89f2dc4b003 | 12 | { |
JimCarver | 0:f89f2dc4b003 | 13 | int ob[2]; |
JimCarver | 0:f89f2dc4b003 | 14 | int c = 0; |
JimCarver | 0:f89f2dc4b003 | 15 | ob[1] = 0; |
JimCarver | 0:f89f2dc4b003 | 16 | ob[0] = reg + 128; |
JimCarver | 0:f89f2dc4b003 | 17 | _spi_cs = 0; |
JimCarver | 0:f89f2dc4b003 | 18 | _spi.write(ob[0]); |
JimCarver | 0:f89f2dc4b003 | 19 | _spi.write(ob[1]); |
JimCarver | 0:f89f2dc4b003 | 20 | while(c < len) _spi.write(d[c++]); |
JimCarver | 0:f89f2dc4b003 | 21 | _spi_cs = 1; |
JimCarver | 0:f89f2dc4b003 | 22 | } |
JimCarver | 0:f89f2dc4b003 | 23 | |
JimCarver | 0:f89f2dc4b003 | 24 | void FXLS8471Q::RegRead( int reg, int *d, int len) |
JimCarver | 0:f89f2dc4b003 | 25 | { |
JimCarver | 0:f89f2dc4b003 | 26 | int ob[2]; |
JimCarver | 0:f89f2dc4b003 | 27 | int c = 0; |
JimCarver | 0:f89f2dc4b003 | 28 | ob[0] = reg; |
JimCarver | 0:f89f2dc4b003 | 29 | ob[1] = 0; |
JimCarver | 0:f89f2dc4b003 | 30 | _spi_cs = 0; |
JimCarver | 0:f89f2dc4b003 | 31 | _spi.write(ob[0]); |
JimCarver | 0:f89f2dc4b003 | 32 | _spi.write(ob[1]); |
JimCarver | 0:f89f2dc4b003 | 33 | while(c < len) d[c++] = _spi.write(0xff); |
JimCarver | 0:f89f2dc4b003 | 34 | _spi_cs = 1; |
JimCarver | 0:f89f2dc4b003 | 35 | } |
JimCarver | 0:f89f2dc4b003 | 36 | |
JimCarver | 0:f89f2dc4b003 | 37 | void FXLS8471Q::begin(void) |
JimCarver | 0:f89f2dc4b003 | 38 | { |
JimCarver | 0:f89f2dc4b003 | 39 | int databyte; |
JimCarver | 0:f89f2dc4b003 | 40 | |
JimCarver | 0:f89f2dc4b003 | 41 | // write 0000 0000 = 0x00 to accelerometer control register 1 to place FXLS8471Q into |
JimCarver | 0:f89f2dc4b003 | 42 | // standby |
JimCarver | 0:f89f2dc4b003 | 43 | // [7-1] = 0000 000 |
JimCarver | 0:f89f2dc4b003 | 44 | // [0]: active=0 |
JimCarver | 0:f89f2dc4b003 | 45 | databyte = 0x00; |
JimCarver | 0:f89f2dc4b003 | 46 | RegWrite(FXLS8471Q_CTRL_REG1, &databyte, 1); |
JimCarver | 0:f89f2dc4b003 | 47 | |
JimCarver | 0:f89f2dc4b003 | 48 | // write 0000 0001= 0x01 to XYZ_DATA_CFG register |
JimCarver | 0:f89f2dc4b003 | 49 | // [7]: reserved |
JimCarver | 0:f89f2dc4b003 | 50 | // [6]: reserved |
JimCarver | 0:f89f2dc4b003 | 51 | // [5]: reserved |
JimCarver | 0:f89f2dc4b003 | 52 | // [4]: hpf_out=0 |
JimCarver | 0:f89f2dc4b003 | 53 | // [3]: reserved |
JimCarver | 0:f89f2dc4b003 | 54 | // [2]: reserved |
JimCarver | 0:f89f2dc4b003 | 55 | // [1-0]: fs=00 for accelerometer range of +/-2g with 0.244mg/LSB |
JimCarver | 0:f89f2dc4b003 | 56 | databyte = 0x00; |
JimCarver | 0:f89f2dc4b003 | 57 | RegWrite(FXLS8471Q_XYZ_DATA_CFG, &databyte, 1); |
JimCarver | 0:f89f2dc4b003 | 58 | |
JimCarver | 0:f89f2dc4b003 | 59 | // write 0001 0101b = 0x15 to accelerometer control register 1 |
JimCarver | 0:f89f2dc4b003 | 60 | // [7-6]: aslp_rate=00 |
JimCarver | 0:f89f2dc4b003 | 61 | // [5-3]: dr=010 for 200Hz data rate |
JimCarver | 0:f89f2dc4b003 | 62 | // [2]: lnoise=1 for low noise mode |
JimCarver | 0:f89f2dc4b003 | 63 | // [1]: f_read=0 for normal 16 bit reads |
JimCarver | 0:f89f2dc4b003 | 64 | // [0]: active=1 to take the part out of standby and enable sampling |
JimCarver | 0:f89f2dc4b003 | 65 | databyte = 0x15; |
JimCarver | 0:f89f2dc4b003 | 66 | RegWrite(FXLS8471Q_CTRL_REG1, &databyte, 1); |
JimCarver | 0:f89f2dc4b003 | 67 | } |
JimCarver | 0:f89f2dc4b003 | 68 | |
JimCarver | 0:f89f2dc4b003 | 69 | void FXLS8471Q::ReadXYZ(float * fdata) |
JimCarver | 0:f89f2dc4b003 | 70 | { |
JimCarver | 0:f89f2dc4b003 | 71 | int raw[7]; |
JimCarver | 0:f89f2dc4b003 | 72 | int16_t ix, iy, iz; |
JimCarver | 0:f89f2dc4b003 | 73 | RegRead(FXLS8471Q_STATUS, raw, 7); |
JimCarver | 0:f89f2dc4b003 | 74 | |
JimCarver | 0:f89f2dc4b003 | 75 | ix = ((raw[1] * 256) + raw[2]);// / 4; |
JimCarver | 0:f89f2dc4b003 | 76 | iy = ((raw[3] * 256) + raw[4]);// / 4; |
JimCarver | 0:f89f2dc4b003 | 77 | iz = ((raw[5] * 256) + raw[6]);// / 4; |
JimCarver | 0:f89f2dc4b003 | 78 | fdata[0] = ((float) ix) / 16384.0; |
JimCarver | 0:f89f2dc4b003 | 79 | fdata[1] = ((float) iy) / 16384.0; |
JimCarver | 0:f89f2dc4b003 | 80 | fdata[2] = ((float) iz) / 16384.0; |
JimCarver | 0:f89f2dc4b003 | 81 | } |
JimCarver | 0:f89f2dc4b003 | 82 |