blob: 506092084900bea9ab4abcf03e6a9d5afcd9d02a (
plain)
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
|
#include <unistd.h>
#include <string.h>
#include "transpose.h"
void transpose_data(volatile uint8_t *rx_buf, volatile struct framebuf *out_fb) {
memset((uint8_t *)out_fb, 0, sizeof(*out_fb));
struct data_format *rxp = (struct data_format *)rx_buf;
for (int bit=0; bit<8; bit++) { /* bits */
uint32_t bit_mask = 1U<<bit;
volatile uint32_t *frame_data = out_fb->frame[bit+2].data;
uint8_t *start_inp = rxp->high;
for (volatile uint32_t *outp=frame_data; outp<frame_data+8; outp++) { /* segments */
uint32_t acc = 0;
uint8_t *inp = start_inp++;
for (int digit=0; digit<32; digit++) {
acc |= (*inp & bit_mask) >> bit << digit;
inp += sizeof(struct data_format);
}
*outp = acc;
}
}
for (int bit=0; bit<2; bit++) { /* bits */
volatile uint32_t *frame_data = out_fb->frame[bit].data;
for (int seg=0; seg<8; seg++) { /* segments */
uint16_t *inp = &rxp->low;
uint32_t mask = 1 << bit << (seg*2);
uint32_t acc = 0;
for (int digit=0; digit<32; digit++) {
acc |= (*inp & mask) >> bit >> seg << digit;
inp += sizeof(struct data_format)/sizeof(uint16_t);
}
frame_data[seg] = acc;
}
}
out_fb->brightness = ((volatile struct framebuf *)rx_buf)->brightness;
}
void untranspose_data(struct framebuf *fb, uint8_t *txbuf) {
memset(txbuf, 0, sizeof(*fb));
struct data_format *tx = (struct data_format *) txbuf;
for (size_t i=0; i<32; i++) { /* digit */
for (size_t j=0; j<8; j++) { /* segment */
for (size_t k=0; k<8; k++) { /* bit */
tx[i].high[j] |= (fb->frame[k+2].data[j] & (1<<i)) ? (1<<k) : 0;
}
}
}
for (size_t i=0; i<32; i++) { /* digit */
for (size_t j=0; j<8; j++) { /* segment */
for (size_t k=0; k<2; k++) { /* bit */
tx[i].low |= (fb->frame[k].data[j] & (1<<i)) ? (1<<k<<(j*2)) : 0;
}
}
}
}
|