1 files changed, 45 insertions, 0 deletions
diff --git a/fw/transpose.h b/fw/transpose.h
new file mode 100644
index 0000000..1927a72
--- /dev/null
+++ b/fw/transpose.h
@@ -0,0 +1,45 @@
+#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,
+    nbits = 10,
+};
+
+enum {
+    frame_size_words = nrows*ncols*nsegments/32,
+};
+
+struct framebuf {
+    /* Multiplexing order: first Digits, then Time/bits, last Segments */
+    union {
+        uint32_t data[nbits*frame_size_words];
+        struct {
+            struct {
+                uint32_t data[frame_size_words];
+            } frame[nbits];
+        };
+    };
+    uint8_t brightness; /* 0 or 1; controls global brighntess control */
+};
+
+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__