# -*- coding:UTF-8 -*-
##
# | file : LCD_1IN44.py
# | version : V2.0
# | date : 2018-07-16
# | function : On the ST7735S chip driver and clear screen, drawing lines, drawing, writing
# and other functions to achieve
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documnetation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
import LCD_Config
import RPi.GPIO as GPIO
import time
import numpy as np
LCD_1IN44 = 1
LCD_1IN8 = 0
if LCD_1IN44 == 1:
LCD_WIDTH = 128 #LCD width
LCD_HEIGHT = 128 #LCD height
LCD_X = 2
LCD_Y = 1
if LCD_1IN8 == 1:
LCD_WIDTH = 160
LCD_HEIGHT = 128
LCD_X = 1
LCD_Y = 2
LCD_X_MAXPIXEL = 132 #LCD width maximum memory
LCD_Y_MAXPIXEL = 162 #LCD height maximum memory
#scanning method
L2R_U2D = 1
L2R_D2U = 2
R2L_U2D = 3
R2L_D2U = 4
U2D_L2R = 5
U2D_R2L = 6
D2U_L2R = 7
D2U_R2L = 8
SCAN_DIR_DFT = U2D_R2L
class LCD:
def __init__(self):
self.width = LCD_WIDTH
self.height = LCD_HEIGHT
self.LCD_Scan_Dir = SCAN_DIR_DFT
self.LCD_X_Adjust = LCD_X
self.LCD_Y_Adjust = LCD_Y
""" Hardware reset """
def LCD_Reset(self):
GPIO.output(LCD_Config.LCD_RST_PIN, GPIO.HIGH)
LCD_Config.Driver_Delay_ms(100)
GPIO.output(LCD_Config.LCD_RST_PIN, GPIO.LOW)
LCD_Config.Driver_Delay_ms(100)
GPIO.output(LCD_Config.LCD_RST_PIN, GPIO.HIGH)
LCD_Config.Driver_Delay_ms(100)
""" Write register address and data """
def LCD_WriteReg(self, Reg):
GPIO.output(LCD_Config.LCD_DC_PIN, GPIO.LOW)
LCD_Config.SPI_Write_Byte([Reg])
def LCD_WriteData_8bit(self, Data):
GPIO.output(LCD_Config.LCD_DC_PIN, GPIO.HIGH)
LCD_Config.SPI_Write_Byte([Data])
def LCD_WriteData_NLen16Bit(self, Data, DataLen):
GPIO.output(LCD_Config.LCD_DC_PIN, GPIO.HIGH)
for i in range(0, DataLen):
LCD_Config.SPI_Write_Byte([Data >> 8])
LCD_Config.SPI_Write_Byte([Data & 0xff])
""" Common register initialization """
def LCD_InitReg(self):
#ST7735R Frame Rate
self.LCD_WriteReg(0xB1)
self.LCD_WriteData_8bit(0x01)
self.LCD_WriteData_8bit(0x2C)
self.LCD_WriteData_8bit(0x2D)
self.LCD_WriteReg(0xB2)
self.LCD_WriteData_8bit(0x01)
self.LCD_WriteData_8bit(0x2C)
self.LCD_WriteData_8bit(0x2D)
self.LCD_WriteReg(0xB3)
self.LCD_WriteData_8bit(0x01)
self.LCD_WriteData_8bit(0x2C)
self.LCD_WriteData_8bit(0x2D)
self.LCD_WriteData_8bit(0x01)
self.LCD_WriteData_8bit(0x2C)
self.LCD_WriteData_8bit(0x2D)
#Column inversion
self.LCD_WriteReg(0xB4)
self.LCD_WriteData_8bit(0x07)
#ST7735R Power Sequence
self.LCD_WriteReg(0xC0)
self.LCD_WriteData_8bit(0xA2)
self.LCD_WriteData_8bit(0x02)
self.LCD_WriteData_8bit(0x84)
self.LCD_WriteReg(0xC1)
self.LCD_WriteData_8bit(0xC5)
self.LCD_WriteReg(0xC2)
self.LCD_WriteData_8bit(0x0A)
self.LCD_WriteData_8bit(0x00)
self.LCD_WriteReg(0xC3)
self.LCD_WriteData_8bit(0x8A)
self.LCD_WriteData_8bit(0x2A)
self.LCD_WriteReg(0xC4)
self.LCD_WriteData_8bit(0x8A)
self.LCD_WriteData_8bit(0xEE)
self.LCD_WriteReg(0xC5)#VCOM
self.LCD_WriteData_8bit(0x0E)
#ST7735R Gamma Sequence
self.LCD_WriteReg(0xe0)
self.LCD_WriteData_8bit(0x0f)
self.LCD_WriteData_8bit(0x1a)
self.LCD_WriteData_8bit(0x0f)
self.LCD_WriteData_8bit(0x18)
self.LCD_WriteData_8bit(0x2f)
self.LCD_WriteData_8bit(0x28)
self.LCD_WriteData_8bit(0x20)
self.LCD_WriteData_8bit(0x22)
self.LCD_WriteData_8bit(0x1f)
self.LCD_WriteData_8bit(0x1b)
self.LCD_WriteData_8bit(0x23)
self.LCD_WriteData_8bit(0x37)
self.LCD_WriteData_8bit(0x00)
self.LCD_WriteData_8bit(0x07)
self.LCD_WriteData_8bit(0x02)
self.LCD_WriteData_8bit(0x10)
self.LCD_WriteReg(0xe1)
self.LCD_WriteData_8bit(0x0f)
self.LCD_WriteData_8bit(0x1b)
self.LCD_WriteData_8bit(0x0f)
self.LCD_WriteData_8bit(0x17)
self.LCD_WriteData_8bit(0x33)
self.LCD_WriteData_8bit(0x2c)
self.LCD_WriteData_8bit(0x29)
self.LCD_WriteData_8bit(0x2e)
self.LCD_WriteData_8bit(0x30)
self.LCD_WriteData_8bit(0x30)
self.LCD_WriteData_8bit(0x39)
self.LCD_WriteData_8bit(0x3f)
self.LCD_WriteData_8bit(0x00)
self.LCD_WriteData_8bit(0x07)
self.LCD_WriteData_8bit(0x03)
self.LCD_WriteData_8bit(0x10)
#Enable test command
self.LCD_WriteReg(0xF0)
self.LCD_WriteData_8bit(0x01)
#Disable ram power save mode
self.LCD_WriteReg(0xF6)
self.LCD_WriteData_8bit(0x00)
#65k mode
self.LCD_WriteReg(0x3A)
self.LCD_WriteData_8bit(0x05)
#********************************************************************************
#function: Set the display scan and color transfer modes
#parameter:
# Scan_dir : Scan direction
# Colorchose : RGB or GBR color format
#********************************************************************************
def LCD_SetGramScanWay(self, Scan_dir):
#Get the screen scan direction
self.LCD_Scan_Dir = Scan_dir
#Get GRAM and LCD width and height
if (Scan_dir == L2R_U2D) or (Scan_dir == L2R_D2U) or (Scan_dir == R2L_U2D) or (Scan_dir == R2L_D2U) :
self.width = LCD_HEIGHT
self.height = LCD_WIDTH
if Scan_dir == L2R_U2D:
MemoryAccessReg_Data = 0X00 | 0x00
elif Scan_dir == L2R_D2U:
MemoryAccessReg_Data = 0X00 | 0x80
elif Scan_dir == R2L_U2D:
MemoryAccessReg_Data = 0x40 | 0x00
else: #R2L_D2U:
MemoryAccessReg_Data = 0x40 | 0x80
else:
self.width = LCD_WIDTH
self.height = LCD_HEIGHT
if Scan_dir == U2D_L2R:
MemoryAccessReg_Data = 0X00 | 0x00 | 0x20
elif Scan_dir == U2D_R2L:
MemoryAccessReg_Data = 0X00 | 0x40 | 0x20
elif Scan_dir == D2U_L2R:
MemoryAccessReg_Data = 0x80 | 0x00 | 0x20
else: #R2L_D2U
MemoryAccessReg_Data = 0x40 | 0x80 | 0x20
#please set (MemoryAccessReg_Data & 0x10) != 1
if (MemoryAccessReg_Data & 0x10) != 1:
self.LCD_X_Adjust = LCD_Y
self.LCD_Y_Adjust = LCD_X
else:
self.LCD_X_Adjust = LCD_X
self.LCD_Y_Adjust = LCD_Y
# Set the read / write scan direction of the frame memory
self.LCD_WriteReg(0x36) #MX, MY, RGB mode
if LCD_1IN44 == 1:
self.LCD_WriteData_8bit( MemoryAccessReg_Data | 0x08) #0x08 set RGB
else:
self.LCD_WriteData_8bit( MemoryAccessReg_Data & 0xf7) #RGB color filter panel
#/********************************************************************************
#function:
# initialization
#********************************************************************************/
def LCD_Init(self, Lcd_ScanDir):
if (LCD_Config.GPIO_Init() != 0):
return -1
#Turn on the backlight
GPIO.output(LCD_Config.LCD_BL_PIN,GPIO.HIGH)
#Hardware reset
self.LCD_Reset()
#Set the initialization register
self.LCD_InitReg()
#Set the display scan and color transfer modes
self.LCD_SetGramScanWay(Lcd_ScanDir)
LCD_Config.Driver_Delay_ms(200)
#sleep out
self.LCD_WriteReg(0x11)
LCD_Config.Driver_Delay_ms(120)
#Turn on the LCD display
self.LCD_WriteReg(0x29)
#/********************************************************************************
#function: Sets the start position and size of the display area
#parameter:
# Xstart : X direction Start coordinates
# Ystart : Y direction Start coordinates
# Xend : X direction end coordinates
# Yend : Y direction end coordinates
#********************************************************************************/
def LCD_SetWindows(self, Xstart, Ystart, Xend, Yend):
#set the X coordinates
self.LCD_WriteReg(0x2A)
self.LCD_WriteData_8bit(0x00)
self.LCD_WriteData_8bit((Xstart & 0xff) + self.LCD_X_Adjust)
self.LCD_WriteData_8bit(0x00)
self.LCD_WriteData_8bit(((Xend - 1) & 0xff) + self.LCD_X_Adjust)
#set the Y coordinates
self.LCD_WriteReg (0x2B)
self.LCD_WriteData_8bit(0x00)
self.LCD_WriteData_8bit((Ystart & 0xff) + self.LCD_Y_Adjust)
self.LCD_WriteData_8bit(0x00)
self.LCD_WriteData_8bit(((Yend - 1) & 0xff )+ self.LCD_Y_Adjust)
self.LCD_WriteReg(0x2C)
def LCD_Clear(self):
#hello
_buffer = [0xff]*(self.width * self.height * 2)
self.LCD_SetWindows(0, 0, self.width, self.height)
GPIO.output(LCD_Config.LCD_DC_PIN, GPIO.HIGH)
for i in range(0,len(_buffer),4096):
LCD_Config.SPI_Write_Byte(_buffer[i:i+4096])
def LCD_ShowImage(self,Image,Xstart,Ystart):
if (Image == None):
return
imwidth, imheight = Image.size
if imwidth != self.width or imheight != self.height:
raise ValueError('Image must be same dimensions as display \
({0}x{1}).' .format(self.width, self.height))
img = np.asarray(Image)
pix = np.zeros((self.width,self.height,2), dtype = np.uint8)
pix[...,[0]] = np.add(np.bitwise_and(img[...,[0]],0xF8),np.right_shift(img[...,[1]],5))
pix[...,[1]] = np.add(np.bitwise_and(np.left_shift(img[...,[1]],3),0xE0),np.right_shift(img[...,[2]],3))
pix = pix.flatten().tolist()
self.LCD_SetWindows(0, 0, self.width , self.height)
GPIO.output(LCD_Config.LCD_DC_PIN, GPIO.HIGH)
for i in range(0,len(pix),4096):
LCD_Config.SPI_Write_Byte(pix[i:i+4096])
