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| import RPi.GPIO as GPIO
import spidev
import time
import random
SPI_SPEED_HZ = 1000000
WIDTH = 128
HEIGHT = 64
PIN_CS = 8
PIN_RST = 5
PIN_DC = 6
ST7567_PAGESIZE = 128
ST7567_DISPOFF = 0xae # 0xae: Display OFF (sleep mode) */
ST7567_DISPON = 0xaf # 0xaf: Display ON in normal mode */
ST7567_SETSTARTLINE = 0x40 # 0x40-7f: Set display start line */
ST7567_STARTLINE_MASK = 0x3f
ST7567_REG_RATIO = 0x20
ST7567_SETPAGESTART = 0xb0 # 0xb0-b7: Set page start address */
ST7567_PAGESTART_MASK = 0x07
ST7567_SETCOLL = 0x00 # 0x00-0x0f: Set lower column address */
ST7567_COLL_MASK = 0x0f
ST7567_SETCOLH = 0x10 # 0x10-0x1f: Set higher column address */
ST7567_COLH_MASK = 0x0f
ST7567_SEG_DIR_NORMAL = 0xa0 # 0xa0: Column address 0 is mapped to SEG0 */
ST7567_SEG_DIR_REV = 0xa1 # 0xa1: Column address 128 is mapped to SEG0 */
ST7567_DISPNORMAL = 0xa6 # 0xa6: Normal display */
ST7567_DISPINVERSE = 0xa7 # 0xa7: Inverse display */
ST7567_DISPRAM = 0xa4 # 0xa4: Resume to RAM content display */
ST7567_DISPENTIRE = 0xa5 # 0xa5: Entire display ON */
ST7567_BIAS_1_9 = 0xa2 # 0xa2: Select BIAS setting 1/9 */
ST7567_BIAS_1_7 = 0xa3 # 0xa3: Select BIAS setting 1/7 */
ST7567_ENTER_RMWMODE = 0xe0 # 0xe0: Enter the Read Modify Write mode */
ST7567_EXIT_RMWMODE = 0xee # 0xee: Leave the Read Modify Write mode */
ST7567_EXIT_SOFTRST = 0xe2 # 0xe2: Software RESET */
ST7567_SETCOMNORMAL = 0xc0 # 0xc0: Set COM output direction, normal mode */
ST7567_SETCOMREVERSE = 0xc8 # 0xc8: Set COM output direction, reverse mode */
ST7567_POWERCTRL_VF = 0x29 # 0x29: Control built-in power circuit */
ST7567_POWERCTRL_VR = 0x2a # 0x2a: Control built-in power circuit */
ST7567_POWERCTRL_VB = 0x2c # 0x2c: Control built-in power circuit */
ST7567_POWERCTRL = 0x2f # 0x2c: Control built-in power circuit */
ST7567_REG_RES_RR0 = 0x21 # 0x21: Regulation Resistior ratio */
ST7567_REG_RES_RR1 = 0x22 # 0x22: Regulation Resistior ratio */
ST7567_REG_RES_RR2 = 0x24 # 0x24: Regulation Resistior ratio */
ST7567_SETCONTRAST = 0x81 # 0x81: Set contrast control */
ST7567_SETBOOSTER = 0xf8 # Set booster level */
ST7567_SETBOOSTER4X = 0x00 # Set booster level */
ST7567_SETBOOSTER5X = 0x01 # Set booster level */
ST7567_NOP = 0xe3 # 0xe3: NOP Command for no operation */
ST7565_STARTBYTES = 0
class ST7567:
def __init__(self, pin_rst=PIN_RST, pin_dc=PIN_DC, spi_bus=0, spi_cs=0, spi_speed=SPI_SPEED_HZ):
self._is_setup = False
self.pin_rst = pin_rst
self.pin_dc = pin_dc
self.spi_bus = spi_bus
self.spi_cs = spi_cs
self.spi_speed = spi_speed
self.clear()
def setup(self):
if self._is_setup:
return True
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(self.pin_rst, GPIO.OUT)
GPIO.setup(self.pin_dc, GPIO.OUT)
self.spi = spidev.SpiDev()
self.spi.open(self.spi_bus, self.spi_cs)
self.spi.max_speed_hz = self.spi_speed
self._reset()
self._init()
self._is_setup = True
def dimensions(self):
return (WIDTH, HEIGHT)
def clear(self):
self.buf = [0 for _ in range(128*64//8)]
def _command(self, data):
GPIO.output(self.pin_dc, 0)
self.spi.writebytes(data)
def _data(self, data):
GPIO.output(self.pin_dc, 1)
self.spi.writebytes(data)
def _reset(self):
GPIO.output(self.pin_rst, 0 )
time.sleep(0.01)
GPIO.output(self.pin_rst, 1 )
time.sleep(0.1)
def _init(self):
self._command([
ST7567_BIAS_1_7, # Bais 1/7 (0xA2 = Bias 1/9)
ST7567_SEG_DIR_NORMAL,
ST7567_SETCOMREVERSE, # Reverse COM - vertical flip
ST7567_DISPNORMAL, # Inverse display (0xA6 normal)
ST7567_SETSTARTLINE | 0, # Start at line 0
ST7567_POWERCTRL,
ST7567_REG_RATIO|2,
ST7567_DISPON,
ST7567_SETCONTRAST, # Set contrast
58 # Contrast value
])
def set_pixel(self, x, y, value):
offset = ((y//8) * WIDTH) + x
bit = y % 8
self.buf[offset] &= ~(1 << bit)
self.buf[offset] |= (value & 1) << bit
def show(self):
self.setup()
self._command([ST7567_ENTER_RMWMODE])
for page in range(8):
offset = page * ST7567_PAGESIZE
self._command([ST7567_SETPAGESTART | page, ST7567_SETCOLL, ST7567_SETCOLH])
self._data(self.buf[offset:offset+ST7567_PAGESIZE])
self._command([ST7567_EXIT_RMWMODE])
if __name__ == "__main__":
st7567 = ST7567()
st7567.setup()
for x in range(64):
st7567.set_pixel(x, x, 1)
st7567.set_pixel(64-x, x, 1)
st7567.set_pixel(x+2, x, 1)
st7567.show()
time.sleep(2.0)
try:
while True:
for x in range(128):
for y in range(64):
st7567.set_pixel(x, y, random.randint(0,1))
st7567.show()
except KeyboardInterrupt:
pass |
