Markus Kalkbrenner / Mbed 2 deprecated Pinscape_Controller

work in progress

Dependencies:   FastAnalogIn FastIO USBDevice mbed FastPWM SimpleDMA

Fork of Pinscape_Controller by Mike R

TSL1410R/tsl410r.cpp@2:c174f9ee414a, 2014-07-22 (annotated)

Committer:
mjr
Date:
Tue Jul 22 04:33:47 2014 +0000
Revision:
2:c174f9ee414a
Child:
6:cc35eb643e8f
Before change to ISR for accelerometer

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mjr 2:c174f9ee414a 1 #include "mbed.h"
mjr 2:c174f9ee414a 2 #include "tsl1410r.h"
mjr 2:c174f9ee414a 3
mjr 2:c174f9ee414a 4 TSL1410R::TSL1410R(PinName siPort, PinName clockPort, PinName aoPort)
mjr 2:c174f9ee414a 5 : si(siPort), clock(clockPort), ao(aoPort)
mjr 2:c174f9ee414a 6 {
mjr 2:c174f9ee414a 7 // clear out power-on noise by clocking through all pixels twice
mjr 2:c174f9ee414a 8 clear();
mjr 2:c174f9ee414a 9 clear();
mjr 2:c174f9ee414a 10 }
mjr 2:c174f9ee414a 11
mjr 2:c174f9ee414a 12 void TSL1410R::clear()
mjr 2:c174f9ee414a 13 {
mjr 2:c174f9ee414a 14 // clock in an SI pulse
mjr 2:c174f9ee414a 15 si = 1;
mjr 2:c174f9ee414a 16 clock = 1;
mjr 2:c174f9ee414a 17 clock = 0;
mjr 2:c174f9ee414a 18 si = 0;
mjr 2:c174f9ee414a 19
mjr 2:c174f9ee414a 20 // clock out all pixels
mjr 2:c174f9ee414a 21 for (int i = 0 ; i < nPix + 1 ; ++i) {
mjr 2:c174f9ee414a 22 clock = 1;
mjr 2:c174f9ee414a 23 clock = 0;
mjr 2:c174f9ee414a 24 }
mjr 2:c174f9ee414a 25 }
mjr 2:c174f9ee414a 26
mjr 2:c174f9ee414a 27 void TSL1410R::read(uint16_t *pix, int n)
mjr 2:c174f9ee414a 28 {
mjr 2:c174f9ee414a 29 // Start the next integration cycle by pulsing SI and one clock.
mjr 2:c174f9ee414a 30 si = 1;
mjr 2:c174f9ee414a 31 clock = 1;
mjr 2:c174f9ee414a 32 clock = 0;
mjr 2:c174f9ee414a 33 si = 0;
mjr 2:c174f9ee414a 34
mjr 2:c174f9ee414a 35 // figure how many pixels to skip on each read
mjr 2:c174f9ee414a 36 int skip = nPix/n - 1;
mjr 2:c174f9ee414a 37
mjr 2:c174f9ee414a 38 // read the pixels
mjr 2:c174f9ee414a 39 for (int src = 0, dst = 0 ; src < nPix ; ++src)
mjr 2:c174f9ee414a 40 {
mjr 2:c174f9ee414a 41 // read this pixel
mjr 2:c174f9ee414a 42 pix[dst++] = ao.read_u16();
mjr 2:c174f9ee414a 43
mjr 2:c174f9ee414a 44 // clock in the next pixel
mjr 2:c174f9ee414a 45 clock = 1;
mjr 2:c174f9ee414a 46 clock = 0;
mjr 2:c174f9ee414a 47
mjr 2:c174f9ee414a 48 // clock skipped pixels
mjr 2:c174f9ee414a 49 for (int i = 0 ; i < skip ; ++i, ++src) {
mjr 2:c174f9ee414a 50 clock = 1;
mjr 2:c174f9ee414a 51 clock = 0;
mjr 2:c174f9ee414a 52 }
mjr 2:c174f9ee414a 53 }
mjr 2:c174f9ee414a 54
mjr 2:c174f9ee414a 55 // clock out one extra pixel to leave A1 in the high-Z state
mjr 2:c174f9ee414a 56 clock = 1;
mjr 2:c174f9ee414a 57 clock = 0;
mjr 2:c174f9ee414a 58 }