mirror of
https://github.com/antirez/uc8151_micropython.git
synced 2026-03-18 14:53:17 +08:00
Play with different LUTs for different refesh times.
This commit is contained in:
antirez
161
uc8151.py
161
uc8151.py
@@ -211,9 +211,15 @@ class UC8151:
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self.write(CMD_PSR,psr_settings)
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# Set the lookup tables depending on the speed.
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self.set_waveform_lut()
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# Here we set the voltage levels that are used for the low-high
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# transitions states, driven by the waveforms provided in the
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# lookup tables for refresh.
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#
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# The VCOM_DC is left to the default of -0.10v, since
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# CMD_VDCS is not given.
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self.write(CMD_PWR, \
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[VDS_INTERNAL|VDG_INTERNAL,
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VCOM_VD|VGHL_16V,
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@@ -256,6 +262,150 @@ class UC8151:
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self.write(CMD_POF)
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self.wait_ready()
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# Set the lookup tables used during the display refresh.
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# We have a table for each transition possibile:
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# white -> white
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# white -> black
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# black -> black
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# black -> white
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# and a final table that controls the VCOM voltage.
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#
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# The update process happens in phases, each 6 rows of each
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# table tells the display how to set each pixel based on the
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# transition (WW, WB, BB, BW) and VCOM in each phase.
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# VCOM is different and explained later, but for the first four
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# tables, this is how to interpret them. For instance the
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# lookup for WW in turbo speed has the first phase set to:
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#
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# 0x54, 0x01, 0x01, 0x02, 0x00, 0x01
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#
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# The first byte must be read as four two bits integers:
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#
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# 0x54 is: 01|01|01|00
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#
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# Where each 2 bit number menas:
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# 00 - Put to ground
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# 01 - Put to VDH voltage (11v in our config)
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# 10 - Put to VDL voltage (-11v in our config)
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# 11 - Not used.
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#
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# Then the next four bytes in the row mean how many
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# "frames" (the refresh tick time, less than 1ms) we
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# hold a given state.
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# So in the above case: hold pixel at VDH for 1 frame, then
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# again VDH for 1 frame, and again, the last entry says 0 frames
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# so it's not used. The final number in the row, 0x01, means
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# that this sequence must be repeated just once. If it was 2
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# the sequence would repeat 2 times and so forth.
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#
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# The VCOM table is similar, but the bits meaning is different:
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# 00 - Put VCOM to VCM_DC voltage
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# 01 - Put VCOM to VDH+VCM_DC voltage (see PWR register config)
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# 10 - Put VCOM to VDL+VCM_DC voltage
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# 11 - Floating
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#
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# The meaning of the additional two bytes in the VCOM table
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# apparently is the following (but I'm not sure what it means):
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# first additional byte: ST_XON, if a (1<<phase) bit is set, for the
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# that phase all gates are on. Second byte: ST_CHV. Like ST_XON
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# but if a bit is set VCOM voltage is set to high for this phase.
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def set_waveform_lut(self):
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if self.speed == UPDATE_SPEED_DEFAULT: return
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if self.speed == UPDATE_SPEED_MEDIUM:
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VCOM = bytes([
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0x00, 0x16, 0x16, 0x0d, 0x00, 0x01,
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0x00, 0x23, 0x23, 0x00, 0x00, 0x02,
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0x00, 0x16, 0x16, 0x0d, 0x00, 0x01,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00
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])
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WHITE = bytes([
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0x54, 0x16, 0x16, 0x0d, 0x00, 0x01,
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0x60, 0x23, 0x23, 0x00, 0x00, 0x02,
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0xa8, 0x16, 0x16, 0x0d, 0x00, 0x01,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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])
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BLACK = bytes([
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0xa8, 0x16, 0x16, 0x0d, 0x00, 0x01,
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0x60, 0x23, 0x23, 0x00, 0x00, 0x02,
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0x54, 0x16, 0x16, 0x0d, 0x00, 0x01,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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])
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elif self.speed == UPDATE_SPEED_FAST:
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VCOM = bytes([
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0x40, 0x17, 0x00, 0x00, 0x00, 0x02,
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0x00, 0x17, 0x17, 0x00, 0x00, 0x02,
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0x00, 0x0A, 0x01, 0x00, 0x00, 0x01,
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0x00, 0x0E, 0x0E, 0x00, 0x00, 0x02,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00
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])
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WHITE = bytes([
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0x40, 0x17, 0x00, 0x00, 0x00, 0x02,
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0x90, 0x17, 0x17, 0x00, 0x00, 0x02,
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0x40, 0x0A, 0x01, 0x00, 0x00, 0x01,
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0xA0, 0x0E, 0x0E, 0x00, 0x00, 0x02,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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])
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BLACK = bytes([
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0x80, 0x17, 0x00, 0x00, 0x00, 0x02,
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0x90, 0x17, 0x17, 0x00, 0x00, 0x02,
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0x80, 0x0A, 0x01, 0x00, 0x00, 0x01,
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0x50, 0x0E, 0x0E, 0x00, 0x00, 0x02,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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])
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elif self.speed == UPDATE_SPEED_TURBO:
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VCOM = bytes([
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0x00, 0x01, 0x01, 0x02, 0x00, 0x01,
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0x00, 0x02, 0x02, 0x00, 0x00, 0x02,
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0x00, 0x02, 0x02, 0x03, 0x00, 0x02,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00
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])
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WHITE = bytes([
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0x54, 0x01, 0x01, 0x02, 0x00, 0x01,
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0x60, 0x02, 0x02, 0x00, 0x00, 0x02,
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0xa8, 0x02, 0x02, 0x03, 0x00, 0x02,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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])
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BLACK = bytes([
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0xa8, 0x01, 0x01, 0x02, 0x00, 0x01,
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0x60, 0x02, 0x02, 0x00, 0x00, 0x02,
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0x54, 0x02, 0x02, 0x03, 0x00, 0x02,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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])
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self.write(CMD_LUT_VCOM,VCOM)
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self.write(CMD_LUT_WW,WHITE)
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self.write(CMD_LUT_BW,WHITE)
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self.write(CMD_LUT_BB,BLACK)
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self.write(CMD_LUT_WB,BLACK)
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# Wait for the display to return back able to accept commands
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# (if it is updating the display it remains busy), and switch
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# it off once it is possible.
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@@ -284,9 +434,16 @@ class UC8151:
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if __name__ == "__main__":
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from machine import SPI
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import random
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spi = SPI(0, baudrate=12000000, phase=0, polarity=0, sck=Pin(18), mosi=Pin(19), miso=Pin(16))
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eink = UC8151(spi,cs=17,dc=20,rst=21,busy=26)
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eink = UC8151(spi,cs=17,dc=20,rst=21,busy=26,speed=UPDATE_SPEED_TURBO)
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eink.fb.ellipse(10,10,10,10,1)
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eink.fb.ellipse(50,50,10,10,1)
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eink.fb.text("SUKA",80,80,1)
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x = random.randrange(100)
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y = random.randrange(100)
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eink.fb.text("TEST",x,y,1)
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start = time.ticks_ms()
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eink.update(blocking=True)
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print("Update time:",time.ticks_ms() - start)
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