Samir Bouaziz
/
TSL230essai
test de TSL230 circuit conversion lumière/frequence
main.cpp@1:0ef745d284a1, 2011-10-19 (annotated)
- Committer:
- bouaziz
- Date:
- Wed Oct 19 18:56:53 2011 +0000
- Revision:
- 1:0ef745d284a1
- Parent:
- 0:94a3a01d13c2
version test
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bouaziz | 0:94a3a01d13c2 | 1 | /* |
bouaziz | 0:94a3a01d13c2 | 2 | **************************************************** |
bouaziz | 0:94a3a01d13c2 | 3 | Frequency is measured by interrupts. |
bouaziz | 0:94a3a01d13c2 | 4 | |
bouaziz | 0:94a3a01d13c2 | 5 | Wiring: TSL230 mBed |
bouaziz | 0:94a3a01d13c2 | 6 | p1(s0) H (p39) |
bouaziz | 0:94a3a01d13c2 | 7 | p2(s1) L (p1) |
bouaziz | 0:94a3a01d13c2 | 8 | p7(s2) H (p39) |
bouaziz | 0:94a3a01d13c2 | 9 | p8(s3) H (p39) |
bouaziz | 0:94a3a01d13c2 | 10 | p6(out) p11 |
bouaziz | 0:94a3a01d13c2 | 11 | les pattes du TSL230 qui reste : |
bouaziz | 0:94a3a01d13c2 | 12 | p3(OE), p4(GND) tied to ground. p5(Vcc) tied to 3V3. |
bouaziz | 0:94a3a01d13c2 | 13 | |
bouaziz | 0:94a3a01d13c2 | 14 | Author: Samir Bouaziz. october 2011. |
bouaziz | 0:94a3a01d13c2 | 15 | *********************(****************************** |
bouaziz | 0:94a3a01d13c2 | 16 | */ |
bouaziz | 0:94a3a01d13c2 | 17 | |
bouaziz | 0:94a3a01d13c2 | 18 | |
bouaziz | 0:94a3a01d13c2 | 19 | #include "mbed.h" |
bouaziz | 1:0ef745d284a1 | 20 | #include "math.h" |
bouaziz | 0:94a3a01d13c2 | 21 | |
bouaziz | 0:94a3a01d13c2 | 22 | |
bouaziz | 0:94a3a01d13c2 | 23 | Serial pc(USBTX, USBRX); |
bouaziz | 0:94a3a01d13c2 | 24 | InterruptIn in(p11); |
bouaziz | 0:94a3a01d13c2 | 25 | Timer t,t2; |
bouaziz | 0:94a3a01d13c2 | 26 | |
bouaziz | 0:94a3a01d13c2 | 27 | float period = 0; // This is the period between interrupts in microseconds |
bouaziz | 0:94a3a01d13c2 | 28 | float freq = 0; |
bouaziz | 0:94a3a01d13c2 | 29 | volatile int demiper,n=0,per; |
bouaziz | 0:94a3a01d13c2 | 30 | |
bouaziz | 0:94a3a01d13c2 | 31 | void itup() { |
bouaziz | 0:94a3a01d13c2 | 32 | switch(n){ |
bouaziz | 0:94a3a01d13c2 | 33 | case 0 : |
bouaziz | 0:94a3a01d13c2 | 34 | t.start(); |
bouaziz | 0:94a3a01d13c2 | 35 | n++; |
bouaziz | 0:94a3a01d13c2 | 36 | break; |
bouaziz | 1:0ef745d284a1 | 37 | // case 1 : |
bouaziz | 0:94a3a01d13c2 | 38 | case 10: t.stop(); |
bouaziz | 0:94a3a01d13c2 | 39 | per=t.read_us(); |
bouaziz | 0:94a3a01d13c2 | 40 | n=0; |
bouaziz | 0:94a3a01d13c2 | 41 | t.reset(); |
bouaziz | 0:94a3a01d13c2 | 42 | break; |
bouaziz | 0:94a3a01d13c2 | 43 | default : n++; |
bouaziz | 0:94a3a01d13c2 | 44 | break; |
bouaziz | 0:94a3a01d13c2 | 45 | } |
bouaziz | 0:94a3a01d13c2 | 46 | } |
bouaziz | 0:94a3a01d13c2 | 47 | |
bouaziz | 0:94a3a01d13c2 | 48 | void itdown() { |
bouaziz | 0:94a3a01d13c2 | 49 | demiper=t.read_us(); |
bouaziz | 0:94a3a01d13c2 | 50 | t.stop(); |
bouaziz | 0:94a3a01d13c2 | 51 | } |
bouaziz | 0:94a3a01d13c2 | 52 | |
bouaziz | 0:94a3a01d13c2 | 53 | |
bouaziz | 0:94a3a01d13c2 | 54 | int main() { |
bouaziz | 1:0ef745d284a1 | 55 | float mes; |
bouaziz | 0:94a3a01d13c2 | 56 | // in.mode(PullUp); // Set the pin to Pull Down mode. |
bouaziz | 0:94a3a01d13c2 | 57 | in.rise(&itup); // Set up the interrupt for rising edge |
bouaziz | 0:94a3a01d13c2 | 58 | // in.fall(&itdown); // Set up the interrupt for rising edge |
bouaziz | 0:94a3a01d13c2 | 59 | while (1) { |
bouaziz | 0:94a3a01d13c2 | 60 | wait(1); |
bouaziz | 0:94a3a01d13c2 | 61 | //freq= 100000.0/((float)per); |
bouaziz | 1:0ef745d284a1 | 62 | mes=(10000./((float)per))/0.0069; |
bouaziz | 1:0ef745d284a1 | 63 | pc.printf("%f %f\r\n",mes,10000000./((float)per)); |
bouaziz | 0:94a3a01d13c2 | 64 | |
bouaziz | 0:94a3a01d13c2 | 65 | } |
bouaziz | 0:94a3a01d13c2 | 66 | } |
bouaziz | 0:94a3a01d13c2 | 67 | |
bouaziz | 0:94a3a01d13c2 | 68 | |
bouaziz | 0:94a3a01d13c2 | 69 |