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60FPS OLED via pre-rendering, buffer swapping hack

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tobyspark committed Aug 4, 2015
1 parent 6252e23 commit 6f4288ae12b5e2fb2321d9ae0ef1b3fa911082d3
Showing with 33 additions and 17 deletions.
  1. +33 −17 tektononethree.py
@@ -40,17 +40,22 @@
draw.rectangle((0,0,oled.width, oled.height), outline=0, fill=0)

# Load default font.
font = ImageFont.load_default()
font = ImageFont.truetype('miso-bold.ttf', 64)

# Draw something
draw.text((0, 0), 'TEKTON ONE THREE', font=font, fill=255)
draw.text((0, 0), 'INIT', font=font, fill=255)
oled.image(image)
oled.display()

oled_status1_pos = (0,20)
oled_status1_poz = (oled.width,39)
oled_status2_pos = (0,40)
oled_status2_poz = (oled.width, 59)
# Keep a reference to the original buffer, to assign back after assigning to cached buffers
buffer_draw = oled._buffer
# Create a cache of buffer 'images' to pre-render display
buffer_cache = [None] * 10
for i in range(10):
draw.rectangle((0,0,oled.width, oled.height), outline=0, fill=0)
draw.text((0, 0), 'RUN ' + str(i), font=font, fill=255)
oled.image(image)
buffer_cache[i] = list(oled._buffer)

### DRIVE via ARDUINO

@@ -129,6 +134,11 @@
print 'Reject sequence file extension for ' + sequence_path
continue

draw.rectangle((0,0,oled.width, oled.height), outline=0, fill=0)
draw.text((0, 0), 'PARSE', font=font, fill=255)
oled.image(image)
oled.display()

if (sequence_path in sequences):
sequence_meta = sequences[sequence_path]['meta']
sequence_led_f_www = sequences[sequence_path]['led_f_www']
@@ -259,6 +269,11 @@

### GO! --------------------------------

draw.rectangle((0,0,oled.width, oled.height), outline=0, fill=0)
draw.text((0, 0), 'CUE', font=font, fill=255)
oled.image(image)
oled.display()

# Command 11 = Sequence init vpos start
vpos_steps = int(sequence_meta[frame_index][2]*drive_max_steps)
arduinoSerial.write(chr(0xC0 + ((vpos_steps >> 12) & 0x3F)) + chr((vpos_steps >> 6) & 0x3F) + chr(vpos_steps & 0x3F))
@@ -272,7 +287,12 @@
arduinoSerial.write(chr(0xC0 + ((vpos_steps >> 12) & 0x3F)) + chr((vpos_steps >> 6) & 0x3F) + chr(vpos_steps & 0x3F))
if (log_to_console):
print("Sequence init sent, vpos " + str(vpos_steps) + ". Waiting for start signal from Drive")
time.sleep(0.1)
time.sleep(1.0/60)

draw.rectangle((0,0,oled.width, oled.height), outline=0, fill=0)
draw.text((0, 0), 'RUN', font=font, fill=255)
oled.image(image)
oled.display()

if (log_to_console):
print("Go!")
@@ -285,11 +305,12 @@
continue

presentation_time = meta[1]
frame_index = meta[0] - 1

while presentation_time > int(time.time() * 1000) - start_time:
time.sleep(0.001)

frame_index = meta[0] - 1
oled._buffer = buffer_cache[frame_index % 10]
oled.display()
time.sleep(0.0001)

# Set Drive

@@ -308,11 +329,6 @@

if (log_to_console):
print("Frame " + str(frame_index) + " vpos_steps " + str(vpos_steps))

# draw.rectangle([oled_status1_pos, oled_status1_poz], outline=0, fill=0)
# draw.text(oled_status1_pos, "Frame: " + items[frame_index], font=font, fill=255)
# draw.rectangle([oled_status2_pos, oled_status2_poz], outline=0, fill=0)
# draw.text(oled_status2_pos, "Position: " + items[items_meta_vpos_index], font=font, fill=255)
# oled.image(image)
# oled.display()

oled._buffer = buffer_draw

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