ctypes pointer narf working now

firmware/main.c

@@ -65,8 +65,8 @@ unsigned const char const CRATE_MAP[CRATE_COUNT] = {
 
 unsigned char framebuffer1[BUS_COUNT*BUS_SIZE];
 unsigned char framebuffer2[BUS_COUNT*BUS_SIZE];
-unsigned char *framebuffer_input = framebuffer1;
+volatile unsigned char *framebuffer_input = framebuffer1;
-unsigned char *framebuffer_output = framebuffer2;
+volatile unsigned char *framebuffer_output = framebuffer2;
 
 unsigned long framebuffer_read(void *data, unsigned long len);
 /* Kick off DMA transfer from RAM to SPI interfaces */

host/font.c

@@ -79,7 +79,7 @@ void free_glyphtable(glyphtable_t *glyph_table){
 glyphtable_t *read_bdf(FILE *f){
 	glyphtable_t *glyph_table = malloc(sizeof(glyphtable_t));
 	if(!glyph_table){
-		printf("Cannot allocate glyph table\n");
+		fprintf(stderr, "Cannot allocate glyph table\n");
 		goto error;
 	}
 	memset(glyph_table, 0, sizeof(*glyph_table));

host/main.c

@@ -20,6 +20,7 @@
 
 
 void free_framebuffer(framebuffer_t *fb){
+	printf("Freeing %lx and %lx\n", fb->data, fb);
 	free(fb->data);
 	free(fb);
 }
@@ -78,6 +79,7 @@ framebuffer_t *framebuffer_render_text(char *s, glyphtable_t *glyph_table){
 		if(g->height > gbufheight)
 			gbufheight = g->height;
 
+
 		gbufwidth += g->width;
 	}
 	/* For easier rendering on the terminal, round up to multiples of two */
@@ -301,6 +303,7 @@ framebuffer_t *framebuffer_render_text(char *s, glyphtable_t *glyph_table){
 	fb->w = gbufwidth;
 	fb->h = gbufheight;
 	fb->data = gbuf;
+	printf("Returning buffer with w %ld h %ld memory location %lx\n", gbufwidth, gbufheight, gbuf);
 	return fb;
 error:
 	free(gbuf);
@@ -354,5 +357,6 @@ void console_render_buffer(framebuffer_t *fb){
 		}
 		printf("\n");
 	}
+	printf("\033[0m");
 }
 

host/matelight.py

@@ -1,7 +1,7 @@
 import usb
 import colorsys
 import numpy as np
-import itertools
+from itertools import product
 
 CRATE_WIDTH = 5
 CRATE_HEIGHT = 4
@@ -20,16 +20,20 @@ def sendframe(framedata):
 	The argument contains a h * w array of 3-tuples of (r, g, b)-data or 4-tuples of (r, g, b, a)-data where the a
 	channel is ignored.
 	"""
-	def chunks(l, n):
+	for cx, cy in product(range(CRATES_X), range(CRATES_Y)):
-		for i in xrange(0, len(l), n):
-			yield l[i:i+n]
-
-	for cx, cy in itertools.product(range(DISPLAY_WIDTH), range(DISPLAY_HEIGHT)):
 		data = [ v for x in range(CRATE_WIDTH) for y in range(CRATE_HEIGHT) for v in framedata[cy*CRATE_HEIGHT + y][cx*CRATE_WIDTH + x][:3] ]
+#		data = [0,0,0]*CRATE_WIDTH*CRATE_HEIGHT
+#		for x, y in product(range(CRATE_WIDTH), range(CRATE_HEIGHT)):
+#			r, g, b, _ = framedata[cy*CRATE_HEIGHT + y][cx*CRATE_WIDTH + x]
+#			data[x*3 + y*CRATE_WIDTH*3 + 0] = r
+#			data[x*3 + y*CRATE_WIDTH*3 + 1] = g
+#			data[x*3 + y*CRATE_WIDTH*3 + 2] = b
+#			print(r, g, b)
+		#data = [ framedata[DISPLAY_WIDTH*3*(cy*CRATE_HEIGHT + y) + 3*(cx*CRATE_WIDTH + x)+c] for x in range(CRATE_WIDTH) for y in range(CRATE_HEIGHT) for c in range(3) ]
 		if len(data) != FRAME_SIZE:
 			raise ValueError('Invalid frame data. Expected {} bytes, got {}.'.format(FRAME_SIZE, len(data)))
 		# Send framebuffer data
-		dev.write(0x01, bytes([0, x, y])+bytes(data))
+		dev.write(0x01, bytes([0, cx, cy])+bytes(data))
 	# Send latch command
 	dev.write(0x01, b'\x01')
 

host/server.py

@@ -1,14 +1,16 @@
 #!/usr/bin/env python
 
-from ctypes import CDLL, POINTER, c_void_p, Structure, c_uint8, c_size_t, cast
+from ctypes import CDLL, POINTER, c_void_p, Structure, c_uint8, c_size_t, cast, addressof
 import numpy as np
+from itertools import product
 from matelight import sendframe
+from terminal import printframe
 
 class COLOR(Structure):
-	_fields_ = ('r', c_uint8), ('g', c_uint8), ('b', c_uint8), ('a', c_uint8)
+        _fields_ = [('r', c_uint8), ('g', c_uint8), ('b', c_uint8), ('a', c_uint8)]
 
 class FRAMEBUFFER(Structure):
-	_fields_ = ('data', POINTER(COLOR)), ('w', c_size_t), ('h', c_size_t)
+        _fields_ = [('data', POINTER(COLOR)), ('w', c_size_t), ('h', c_size_t)]
 
 bdf = CDLL('./libbdf.so')
 bdf.read_bdf_file.restype = c_void_p
@@ -17,16 +19,41 @@ bdf.framebuffer_render_text.restype = POINTER(FRAMEBUFFER)
 unifont = bdf.read_bdf_file('unifont.bdf')
 
 def render_text(text):
-	assert unifont
+    assert unifont
-	fb = bdf.framebuffer_render_text(str(text), unifont)
+    fb = bdf.framebuffer_render_text(bytes(str(text), 'UTF-8'), unifont)
-	fbd = fb.contents
+    fbd = fb.contents
-	buf = np.ctypeslib.as_array(cast(fbd.data, POINTER(c_uint8)), shape=(fbd.h, fbd.w, 4))
+    print('FB STRUCT: w {} h {} memory location {:x}'.format(fbd.w, fbd.h, addressof(fbd.data.contents)))
-	# Set data pointer to NULL before freeing framebuffer struct to prevent free_framebuffer from also freeing the data
+    print("TYPE:", type(fbd.data))
-	# buffer that is now used by numpy
+    casted = cast(fbd.data, POINTER(c_uint8))
-	fb.data = cast(c_void_p(), POINTER(COLOR))
+    print("CASTED TYPE:" , type(casted))
-	bdf.free_framebuffer(fb)
+    buf = np.ctypeslib.as_array(cast(fbd.data, POINTER(c_uint8)), shape=(fbd.h, fbd.w, 4))
-	return buf
+    print('RAW DATA:')
+    alen = fbd.h*fbd.w
+#    for i in range(alen):
+#        c = fbd.data[i]
+#        print('{:x}'.format(addressof(c)), c.r, c.g, c.b)
+    print('BUF', buf.shape, buf.dtype)
+#    for x, y, z in product(range(fbd.h), range(fbd.w), range(4)):
+#        print(buf[x][y][z])
+
+    # Set data pointer to NULL before freeing framebuffer struct to prevent free_framebuffer from also freeing the data
+    # buffer that is now used by numpy
+    bdf.console_render_buffer(fb)
+    fbd.data = cast(c_void_p(), POINTER(COLOR))
+    bdf.free_framebuffer(fb)
+    print('Rendered {} chars into a buffer of w {} h {} numpy buf {}'.format(len(text), fbd.w, fbd.h, buf.shape))
+    return buf
 
 if __name__ == '__main__':
-	sendframe(render_text('test'));
+    fb = render_text('foobarbaz');
+    print('buffer shape {} dtype {}'.format(fb.shape, fb.dtype))
+#   import colorsys
+#    h, w, _ = fb.shape
+#    for x, y in product(range(w), range(h)):
+#        r,g,b = colorsys.hsv_to_rgb(x*0.03+y*0.05, 1, 1)
+#        fb[x][y] = (r,g,b,0)
+#    print(fb)
+    sendframe(fb)
+    #printframe(fb)
+