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  1. import board
  2. import digitalio
  3. import time
  4. import busio
  5. from adafruit_bus_device.spi_device import SPIDevice
  6.  
  7. EPD_WIDTH = 200
  8. EPD_HEIGHT = 200
  9.  
  10. PANEL_SETTING = 0x00
  11. POWER_SETTING = 0x01
  12. POWER_OFF = 0x02
  13. POWER_OFF_SEQUENCE_SETTING = 0x03
  14. POWER_ON = 0x04
  15. POWER_ON_MEASURE = 0x05
  16. BOOSTER_SOFT_START = 0x06
  17. DEEP_SLEEP = 0x07
  18. DATA_START_TRANSMISSION_1 = 0x10
  19. DATA_STOP = 0x11
  20. DISPLAY_REFRESH = 0x12
  21. DATA_START_TRANSMISSION_2 = 0x13
  22. PLL_CONTROL = 0x30
  23. TEMPERATURE_SENSOR_COMMAND = 0x40
  24. TEMPERATURE_SENSOR_CALIBRATION = 0x41
  25. TEMPERATURE_SENSOR_WRITE = 0x42
  26. TEMPERATURE_SENSOR_READ = 0x43
  27. VCOM_AND_DATA_INTERVAL_SETTING = 0x50
  28. LOW_POWER_DETECTION = 0x51
  29. TCON_SETTING = 0x60
  30. TCON_RESOLUTION = 0x61
  31. SOURCE_AND_GATE_START_SETTING = 0x62
  32. GET_STATUS = 0x71
  33. AUTO_MEASURE_VCOM = 0x80
  34. VCOM_VALUE = 0x81
  35. VCM_DC_SETTING_REGISTER = 0x82
  36. PROGRAM_MODE = 0xA0
  37. ACTIVE_PROGRAM = 0xA1
  38. READ_OTP_DATA = 0xA2
  39.  
  40. lut_vcom0 = bytearray([
  41. 0x0E, 0x14, 0x01, 0x0A, 0x06, 0x04, 0x0A, 0x0A,
  42. 0x0F, 0x03, 0x03, 0x0C, 0x06, 0x0A, 0x00
  43. ])
  44.  
  45. lut_w = bytearray([
  46. 0x0E, 0x14, 0x01, 0x0A, 0x46, 0x04, 0x8A, 0x4A,
  47. 0x0F, 0x83, 0x43, 0x0C, 0x86, 0x0A, 0x04
  48. ])
  49.  
  50. lut_b = bytearray([
  51. 0x0E, 0x14, 0x01, 0x8A, 0x06, 0x04, 0x8A, 0x4A,
  52. 0x0F, 0x83, 0x43, 0x0C, 0x06, 0x4A, 0x04
  53. ])
  54.  
  55. lut_g1 = bytearray([
  56. 0x8E, 0x94, 0x01, 0x8A, 0x06, 0x04, 0x8A, 0x4A,
  57. 0x0F, 0x83, 0x43, 0x0C, 0x06, 0x0A, 0x04
  58. ])
  59.  
  60. lut_g2 = bytearray([
  61. 0x8E, 0x94, 0x01, 0x8A, 0x06, 0x04, 0x8A, 0x4A,
  62. 0x0F, 0x83, 0x43, 0x0C, 0x06, 0x0A, 0x04
  63. ])
  64.  
  65. lut_vcom1 = bytearray([
  66. 0x03, 0x1D, 0x01, 0x01, 0x08, 0x23, 0x37, 0x37,
  67. 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  68. ])
  69.  
  70. lut_red0 = bytearray([
  71. 0x83, 0x5D, 0x01, 0x81, 0x48, 0x23, 0x77, 0x77,
  72. 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  73. ])
  74.  
  75. lut_red1 = bytearray([
  76. 0x03, 0x1D, 0x01, 0x01, 0x08, 0x23, 0x37, 0x37,
  77. 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  78. ])
  79.  
  80. led = digitalio.DigitalInOut(board.L)
  81. led.direction = digitalio.Direction.OUTPUT
  82.  
  83. busy = digitalio.DigitalInOut(board.BUSY)
  84. res = digitalio.DigitalInOut(board.RES)
  85. dc = digitalio.DigitalInOut(board.DC)
  86. eink_en = digitalio.DigitalInOut(board.EINK_EN)
  87.  
  88. cs = digitalio.DigitalInOut(board.CS)
  89. comm_port = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
  90. device = SPIDevice(comm_port, cs)
  91.  
  92. # for framebuffer
  93. frame_black = bytearray(round(EPD_WIDTH * EPD_HEIGHT / 8))
  94. frame_red = bytearray(round(EPD_WIDTH * EPD_HEIGHT / 8))
  95.  
  96. def epd_send_cmd(cmd):
  97. dc.value = 0
  98. with device as bus_device:
  99. bus_device.write(bytes([cmd]))
  100.  
  101. def epd_send_data(data):
  102. dc.value = 1
  103. with device as bus_device:
  104. bus_device.write(bytes([data]))
  105.  
  106. def epd_wait_until_idle():
  107. while True:
  108. if busy.value != 0:
  109. break
  110. time.sleep(0.1)
  111. led.value = ~led.value
  112.  
  113. def epd_set_lut_bw():
  114. epd_send_cmd(0x20) #g vcom
  115. for count in range(15):
  116. epd_send_data(lut_vcom0[count])
  117.  
  118. epd_send_cmd(0x21) #g ww --
  119. for count in range(15):
  120. epd_send_data(lut_w[count])
  121.  
  122. epd_send_cmd(0x22) #g bw r
  123. for count in range(15):
  124. epd_send_data(lut_b[count])
  125.  
  126. epd_send_cmd(0x23) #g wb w
  127. for count in range(15):
  128. epd_send_data(lut_g1[count])
  129.  
  130. epd_send_cmd(0x24) #g bb b
  131. for count in range(15):
  132. epd_send_data(lut_g2[count])
  133.  
  134. def epd_set_lut_red():
  135. epd_send_cmd(0x25)
  136. for count in range(15):
  137. epd_send_data(lut_vcom1[count])
  138.  
  139. epd_send_cmd(0x26)
  140. for count in range(15):
  141. epd_send_data(lut_red0[count])
  142.  
  143. epd_send_cmd(0x27)
  144. for count in range(15):
  145. epd_send_data(lut_red1[count])
  146.  
  147. def epd_reset():
  148. res.value = 0
  149. time.sleep(0.2)
  150. res.value = 1
  151. time.sleep(0.2)
  152.  
  153. def epd_display_frame():
  154. epd_send_cmd(DATA_START_TRANSMISSION_1)
  155. time.sleep(0.2)
  156. for i in range(EPD_HEIGHT * EPD_WIDTH / 8):
  157. temp = 0x00
  158. for bit in range(4):
  159. if ((frame_black[i] & (0x80 >> bit)) != 0):
  160. temp |= 0xC0 >> (bit * 2)
  161. epd_send_data(temp)
  162.  
  163. temp = 0x00
  164. for bit in range(4, 8):
  165. if ((frame_black[i] & (0x80 >> bit)) != 0):
  166. temp |= 0xC0 >> ((bit - 4) * 2)
  167. epd_send_data(temp)
  168. time.sleep(0.2)
  169.  
  170. epd_send_cmd(DATA_START_TRANSMISSION_2)
  171. time.sleep(0.2)
  172. for i in range(EPD_HEIGHT * EPD_WIDTH / 8):
  173. epd_send_data(frame_red[i])
  174. time.sleep(0.2)
  175.  
  176. epd_send_cmd(DISPLAY_REFRESH)
  177. epd_wait_until_idle()
  178.  
  179. def epd_init():
  180. epd_reset()
  181. epd_send_cmd(POWER_SETTING)
  182. epd_send_data(0x07)
  183. epd_send_data(0x00)
  184. epd_send_data(0x08)
  185. epd_send_data(0x00)
  186. epd_send_cmd(BOOSTER_SOFT_START)
  187. epd_send_data(0x07)
  188. epd_send_data(0x07)
  189. epd_send_data(0x07)
  190. epd_send_cmd(POWER_ON)
  191. epd_wait_until_idle()
  192.  
  193. epd_send_cmd(PANEL_SETTING)
  194. epd_send_data(0xcf)
  195. epd_send_cmd(VCOM_AND_DATA_INTERVAL_SETTING)
  196. epd_send_data(0x17)
  197. epd_send_cmd(PLL_CONTROL)
  198. epd_send_data(0x39)
  199. epd_send_cmd(TCON_RESOLUTION)
  200. epd_send_data(0xC8)
  201. epd_send_data(0x00)
  202. epd_send_data(0xC8)
  203. epd_send_cmd(VCM_DC_SETTING_REGISTER)
  204. epd_send_data(0x30)
  205.  
  206. epd_set_lut_bw()
  207. epd_set_lut_red()
  208.  
  209. time.sleep(0.2)
  210.  
  211. def paint_clear(fb, colored):
  212. if colored:
  213. val = 0x00
  214. else:
  215. val = 0xff
  216. for i in range(len(fb)):
  217. fb[i] = val
  218.  
  219. def epd_sleep():
  220. epd_send_cmd(VCOM_AND_DATA_INTERVAL_SETTING)
  221. epd_send_data(0x17)
  222. epd_send_cmd(VCM_DC_SETTING_REGISTER) #to solve Vcom drop
  223. epd_send_data(0x00)
  224. epd_send_cmd(POWER_SETTING) #power setting
  225. epd_send_data(0x02) #gate switch to external
  226. epd_send_data(0x00)
  227. epd_send_data(0x00)
  228. epd_send_data(0x00)
  229. epd_wait_until_idle()
  230. epd_send_cmd(POWER_OFF)
  231.  
  232. def epaper_pins_off():
  233. busy.direction = digitalio.Direction.OUTPUT
  234. res.direction = digitalio.Direction.OUTPUT
  235. dc.direction = digitalio.Direction.OUTPUT
  236. cs.direction = digitalio.Direction.OUTPUT
  237. eink_en.direction = digitalio.Direction.OUTPUT
  238. res.value = 0
  239. dc.value = 0
  240. cs.value = 0
  241. eink_en.value = 1
  242.  
  243. def epaper_pins_init():
  244. busy.direction = digitalio.Direction.INPUT
  245. res.direction = digitalio.Direction.OUTPUT
  246. res.value = 0
  247. dc.direction = digitalio.Direction.OUTPUT
  248. dc.value = 0
  249. cs.direction = digitalio.Direction.OUTPUT
  250. cs.value = 0
  251.  
  252. time.sleep(0.1)
  253.  
  254. eink_en.direction = digitalio.Direction.OUTPUT
  255. eink_en.value = 1
  256.  
  257. def epaper_on():
  258. time.sleep(0.5)
  259. eink_en.value = 0
  260. time.sleep(0.5)
  261.  
  262. def epaper_off():
  263. time.sleep(0.5)
  264. eink_en.value = 1
  265.  
  266. def paint_draw_pixel(fb, x, y, colored):
  267. if (x < 0 or x >= EPD_WIDTH or y < 0 or y >= EPD_HEIGHT):
  268. return
  269.  
  270. if (colored):
  271. fb[int((x + y * EPD_WIDTH) / 8)] &= ~(0x80 >> (x % 8))
  272. else:
  273. fb[int((x + y * EPD_WIDTH) / 8)] |= 0x80 >> (x % 8)
  274.  
  275. def paint_circle(fb, x, y, radius, colored):
  276. # Bresenham algorithm
  277. x_pos = -radius
  278. y_pos = 0
  279. err = 2 - 2 * radius
  280. e2 = 0
  281.  
  282. while True:
  283. paint_draw_pixel(fb, x - x_pos, y + y_pos, colored)
  284. paint_draw_pixel(fb, x + x_pos, y + y_pos, colored)
  285. paint_draw_pixel(fb, x + x_pos, y - y_pos, colored)
  286. paint_draw_pixel(fb, x - x_pos, y - y_pos, colored)
  287. e2 = err
  288. if (e2 <= y_pos):
  289. y_pos = y_pos + 1
  290. err = err + y_pos * 2 + 1
  291. if(-x_pos == y_pos and e2 <= x_pos):
  292. e2 = 0
  293.  
  294. if (e2 > x_pos):
  295. x_pos = x_pos + 1
  296. err = err + x_pos * 2 + 1
  297.  
  298. if x_pos > 0:
  299. break
  300.  
  301. epaper_pins_init()
  302. epaper_on()
  303. epd_init()
  304.  
  305. paint_clear(frame_black, False)
  306. paint_clear(frame_red, False)
  307.  
  308. for i in range(0, 100, 8):
  309. paint_circle(frame_black, 100, 100, i, True)
  310. paint_circle(frame_red, 100, 100, i+4, True)
  311.  
  312. epd_display_frame()
  313. epd_sleep()
  314.  
  315. while True:
  316. led.value = True
  317. time.sleep(0.5)
  318. led.value = False
  319. time.sleep(0.01)
  320. print("Hello, world!")
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