1bpp WIP

software/libdvi/tmds_encode.h

@@ -17,10 +17,6 @@ void tmds_setup_palette_symbols(const uint16_t *palette, uint32_t *symbuf, size_
 void tmds_setup_palette24_symbols(const uint32_t *palette, uint32_t *symbuf, size_t n_palette);
 void tmds_encode_palette_data(const uint32_t *pixbuf, const uint32_t *tmds_palette, uint32_t *symbuf, size_t n_pix, uint32_t palette_bits);
 
-#if defined(__cplusplus)
-}
-#endif
-
 // Functions from tmds_encode.S
 
 void tmds_encode_1bpp(const uint32_t *pixbuf, uint32_t *symbuf, size_t n_pix);

src/PicoDVI.cpp

@@ -237,3 +237,43 @@ void DVIGFX8x2::swap(bool copy_framebuffer, bool copy_palette) {
     memcpy(palette[back_index], palette[1 - back_index], sizeof(palette[0]));
   }
 }
+
+// 1-bit WIP --------
+
+DVIGFX1::DVIGFX1(const uint16_t w, const uint16_t h,
+                 const struct dvi_timing &t, vreg_voltage v,
+                 const struct dvi_serialiser_cfg &c)
+    : PicoDVI(t, v, c), GFXcanvas1(w, h) {}
+
+DVIGFX1::~DVIGFX1(void) { gfxptr = NULL; }
+
+static void mainloop1(struct dvi_inst *inst) {
+  ((DVIGFX1 *)gfxptr)->foo();
+}
+
+#include "libdvi/tmds_encode.h"
+
+void DVIGFX1::foo(void) {
+  uint8_t *buf = getBuffer();
+  for (;;) {
+    for (uint16_t y = 0; y < HEIGHT; y++) {
+      const uint32_t *colourbuf = (const uint32_t*)(buf + y * (WIDTH + 7) / 8);
+      uint32_t *tmdsbuf;
+      queue_remove_blocking_u32(&dvi0.q_tmds_free, &tmdsbuf);
+      //tmds_encode_1bpp(colourbuf, tmdsbuf, WIDTH);
+      queue_add_blocking_u32(&dvi0.q_tmds_valid, &tmdsbuf);
+    }
+  }
+}
+
+bool DVIGFX1::begin(void) {
+  uint8_t *bufptr = getBuffer();
+  if ((bufptr)) {
+    gfxptr = this;
+    mainloop = mainloop1;
+    PicoDVI::begin();
+    wait_begin = false; // Set core 1 in motion
+    return true;
+  }
+  return false;
+}

src/PicoDVI.h

@@ -92,3 +92,18 @@ protected:
   uint8_t back_index = 0;      // Which of 2 buffers receives draw ops
   volatile bool swap_wait = 0; // For syncronizing front/back buffer swap
 };
+
+class DVIGFX1 : public PicoDVI, public GFXcanvas1 {
+public:
+  DVIGFX1(const uint16_t w = 1280, const uint16_t h = 720,
+          const struct dvi_timing &t = dvi_timing_1280x720p_30hz,
+          vreg_voltage v = VREG_VOLTAGE_1_25,
+          const struct dvi_serialiser_cfg &c = pimoroni_demo_hdmi_cfg);
+  ~DVIGFX1(void);
+  bool begin(void);
+  void foo(void);
+  void _scanline_callback(void);
+
+protected:
+  uint16_t scanline = 2; // First 2 scanlines are set up before DVI start
+};