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#ifndef __TRANSPOSE_H__
#define __TRANSPOSE_H__
#include <stdint.h>
enum Segment { SegA, SegB, SegC, SegD, SegE, SegF, SegG, SegDP, NSEGMENTS };
enum {
NROWS = 4,
NCOLS = 8,
MAX_BITS = 10,
MIN_BITS = 6,
};
enum {
FRAME_SIZE_WORDS = NROWS*NCOLS*NSEGMENTS/32,
};
/* Framebuffer data format pre-formatted for BCM ISRs */
struct framebuf {
/* Multiplexing order: first Digits, then Time/bits, last Segments */
union {
uint32_t data[MAX_BITS*FRAME_SIZE_WORDS];
struct {
struct {
uint32_t data[FRAME_SIZE_WORDS];
} frame[MAX_BITS];
};
};
uint8_t brightness; /* 0 or 1; controls global brighntess control */
};
/* Efficiently-packed UART data format */
struct data_format {
union {
uint8_t high[8];
struct { uint8_t ah, bh, ch, dh, eh, fh, gh, dph; };
};
union {
uint16_t low;
struct { uint8_t dpl:2, gl:2, fl:2, el:2, dl:2, cl:2, bl:2, al:2; };
};
} __attribute__((packed));
void transpose_data(volatile uint8_t *rx_buf, volatile struct framebuf *out_fb);
void untranspose_data(struct framebuf *fb, uint8_t *txbuf);
#endif//__TRANSPOSE_H__
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