1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
#ifndef __INC_CLOCKLESS_ARM_K20_H
#define __INC_CLOCKLESS_ARM_K20_H
// Definition for a single channel clockless controller for the k20 family of chips, like that used in the teensy 3.0/3.1
// See clockless.h for detailed info on how the template parameters are used.
#if defined(FASTLED_TEENSY3)
template <uint8_t DATA_PIN, int T1, int T2, int T3, EOrder RGB_ORDER = RGB, int XTRA0 = 0, bool FLIP = false, int WAIT_TIME = 500>
class ClocklessController : public CLEDController {
typedef typename FastPin<DATA_PIN>::port_ptr_t data_ptr_t;
typedef typename FastPin<DATA_PIN>::port_t data_t;
data_t mPinMask;
data_ptr_t mPort;
CMinWait<WAIT_TIME> mWait;
public:
virtual void init() {
FastPin<DATA_PIN>::setOutput();
mPinMask = FastPin<DATA_PIN>::mask();
mPort = FastPin<DATA_PIN>::port();
}
virtual void clearLeds(int nLeds) {
showColor(CRGB(0, 0, 0), nLeds, 0);
}
// set all the leds on the controller to a given color
virtual void showColor(const struct CRGB & rgbdata, int nLeds, CRGB scale) {
mWait.wait();
cli();
showRGBInternal(PixelController<RGB_ORDER>(rgbdata, nLeds, scale, getDither()));
// Adjust the timer
long microsTaken = nLeds * CLKS_TO_MICROS(24 * (T1 + T2 + T3));
MS_COUNTER += (microsTaken / 1000);
sei();
mWait.mark();
}
virtual void show(const struct CRGB *rgbdata, int nLeds, CRGB scale) {
mWait.wait();
cli();
showRGBInternal(PixelController<RGB_ORDER>(rgbdata, nLeds, scale, getDither()));
// Adjust the timer
long microsTaken = nLeds * CLKS_TO_MICROS(24 * (T1 + T2 + T3));
MS_COUNTER += (microsTaken / 1000);
sei();
mWait.mark();
}
#ifdef SUPPORT_ARGB
virtual void show(const struct CARGB *rgbdata, int nLeds, CRGB scale) {
mWait.wait();
cli();
showRGBInternal(PixelController<RGB_ORDER>(rgbdata, nLeds, scale, getDither()));
// Adjust the timer
long microsTaken = nLeds * CLKS_TO_MICROS(24 * (T1 + T2 + T3));
MS_COUNTER += (microsTaken / 1000);
sei();
mWait.mark();
}
#endif
template<int BITS> __attribute__ ((always_inline)) inline static void writeBits(register uint32_t & next_mark, register data_ptr_t port, register data_t hi, register data_t lo, register uint8_t & b) {
for(register uint32_t i = BITS; i > 0; i--) {
while(ARM_DWT_CYCCNT < next_mark);
next_mark = ARM_DWT_CYCCNT + (T1+T2+T3);
FastPin<DATA_PIN>::fastset(port, hi);
uint32_t flip_mark = next_mark - ((b&0x80) ? (T3) : (T2+T3));
b <<= 1;
while(ARM_DWT_CYCCNT < flip_mark);
FastPin<DATA_PIN>::fastset(port, lo);
}
}
// This method is made static to force making register Y available to use for data on AVR - if the method is non-static, then
// gcc will use register Y for the this pointer.
static void showRGBInternal(PixelController<RGB_ORDER> pixels) {
register data_ptr_t port = FastPin<DATA_PIN>::port();
register data_t hi = *port | FastPin<DATA_PIN>::mask();;
register data_t lo = *port & ~FastPin<DATA_PIN>::mask();;
*port = lo;
// Setup the pixel controller and load/scale the first byte
pixels.preStepFirstByteDithering();
register uint8_t b = pixels.loadAndScale0();
// Get access to the clock
ARM_DEMCR |= ARM_DEMCR_TRCENA;
ARM_DWT_CTRL |= ARM_DWT_CTRL_CYCCNTENA;
ARM_DWT_CYCCNT = 0;
uint32_t next_mark = ARM_DWT_CYCCNT + (T1+T2+T3);
while(pixels.has(1)) {
pixels.stepDithering();
// Write first byte, read next byte
writeBits<8+XTRA0>(next_mark, port, hi, lo, b);
b = pixels.loadAndScale1();
// Write second byte, read 3rd byte
writeBits<8+XTRA0>(next_mark, port, hi, lo, b);
b = pixels.loadAndScale2();
// Write third byte
writeBits<8+XTRA0>(next_mark, port, hi, lo, b);
b = pixels.advanceAndLoadAndScale0();
};
}
};
#endif
#endif
|
