Junaid Ahmed
/
202A_HW1
Configuring sensors dynamically using serial bus from the host computer.
sine-wave.cpp@0:1efeb3fc4ba6, 2014-02-12 (annotated)
- Committer:
- mja054
- Date:
- Wed Feb 12 22:23:22 2014 +0000
- Revision:
- 0:1efeb3fc4ba6
Home work1
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mja054 | 0:1efeb3fc4ba6 | 1 | #include "mbed.h" |
mja054 | 0:1efeb3fc4ba6 | 2 | #include "AnalogOut.h" |
mja054 | 0:1efeb3fc4ba6 | 3 | #include "AnalogIn.h" |
mja054 | 0:1efeb3fc4ba6 | 4 | #include <math.h> |
mja054 | 0:1efeb3fc4ba6 | 5 | |
mja054 | 0:1efeb3fc4ba6 | 6 | #define I2C0_SDA PTE25 |
mja054 | 0:1efeb3fc4ba6 | 7 | #define I2C0_SCL PTE24 |
mja054 | 0:1efeb3fc4ba6 | 8 | #define MMA8451_I2C_ADDRESS (0x1d<<1) |
mja054 | 0:1efeb3fc4ba6 | 9 | #define MAG3110_I2C_ADDRESS (0x0E<<1) |
mja054 | 0:1efeb3fc4ba6 | 10 | #define LIGHT_SENSOR_PIN PTE22 |
mja054 | 0:1efeb3fc4ba6 | 11 | #define PI 3.141f |
mja054 | 0:1efeb3fc4ba6 | 12 | |
mja054 | 0:1efeb3fc4ba6 | 13 | Serial pc_sine(USBTX, USBRX); |
mja054 | 0:1efeb3fc4ba6 | 14 | Timer timer; |
mja054 | 0:1efeb3fc4ba6 | 15 | |
mja054 | 0:1efeb3fc4ba6 | 16 | |
mja054 | 0:1efeb3fc4ba6 | 17 | void sine_wave() |
mja054 | 0:1efeb3fc4ba6 | 18 | { |
mja054 | 0:1efeb3fc4ba6 | 19 | int t = 0; |
mja054 | 0:1efeb3fc4ba6 | 20 | float s; |
mja054 | 0:1efeb3fc4ba6 | 21 | AnalogOut a(PTE30); |
mja054 | 0:1efeb3fc4ba6 | 22 | while (1) { // sin(2 * PI * f * t / Fs) |
mja054 | 0:1efeb3fc4ba6 | 23 | s = sin(2 * PI * 1 * t / 100.0); |
mja054 | 0:1efeb3fc4ba6 | 24 | s = s/2 + .5; |
mja054 | 0:1efeb3fc4ba6 | 25 | a.write(s); |
mja054 | 0:1efeb3fc4ba6 | 26 | pc_sine.printf ("%f\n", s); |
mja054 | 0:1efeb3fc4ba6 | 27 | if (t == 100) |
mja054 | 0:1efeb3fc4ba6 | 28 | t = 0; |
mja054 | 0:1efeb3fc4ba6 | 29 | else |
mja054 | 0:1efeb3fc4ba6 | 30 | t++; |
mja054 | 0:1efeb3fc4ba6 | 31 | wait(0.01); |
mja054 | 0:1efeb3fc4ba6 | 32 | } |
mja054 | 0:1efeb3fc4ba6 | 33 | } |
mja054 | 0:1efeb3fc4ba6 | 34 | |
mja054 | 0:1efeb3fc4ba6 | 35 | void sine_wave_read() |
mja054 | 0:1efeb3fc4ba6 | 36 | { |
mja054 | 0:1efeb3fc4ba6 | 37 | AnalogIn a(PTB0); |
mja054 | 0:1efeb3fc4ba6 | 38 | while(1) { |
mja054 | 0:1efeb3fc4ba6 | 39 | pc_sine.printf("%f\n", a.read()); |
mja054 | 0:1efeb3fc4ba6 | 40 | wait(0.01); |
mja054 | 0:1efeb3fc4ba6 | 41 | } |
mja054 | 0:1efeb3fc4ba6 | 42 | } |
mja054 | 0:1efeb3fc4ba6 | 43 | |
mja054 | 0:1efeb3fc4ba6 | 44 | /* |
mja054 | 0:1efeb3fc4ba6 | 45 | int main() { |
mja054 | 0:1efeb3fc4ba6 | 46 | sine_wave(); |
mja054 | 0:1efeb3fc4ba6 | 47 | |
mja054 | 0:1efeb3fc4ba6 | 48 | char c = pc_sine.getc(); |
mja054 | 0:1efeb3fc4ba6 | 49 | |
mja054 | 0:1efeb3fc4ba6 | 50 | switch (c) { |
mja054 | 0:1efeb3fc4ba6 | 51 | case '1':sine_wave(); |
mja054 | 0:1efeb3fc4ba6 | 52 | break; |
mja054 | 0:1efeb3fc4ba6 | 53 | case '2': sine_wave_read(); |
mja054 | 0:1efeb3fc4ba6 | 54 | break; |
mja054 | 0:1efeb3fc4ba6 | 55 | } |
mja054 | 0:1efeb3fc4ba6 | 56 | } |
mja054 | 0:1efeb3fc4ba6 | 57 | */ |