Reverse RGB565 byte order for ILI9341 TFT Display

OpenMV Boards
26

Also If I want use a TFT screen with ili9341 Driver ?
Now is clear my misunderstanding , I was thinking that new firmware was fissing the problem rised originally by jacon with ili9341.
Anyway now I’ve solved using the byteswap function develope by jacob and the TFT 2,8 inc works ok .
This is the code

import sensor, image, time
from MP_ili9341 import ili9341

sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.skip_frames(time = 2000)

clock = time.clock()

screen = ili9341()
screen.set_window(0,0,320,240)
#screen.load_image('bots16_320x240.bmp')


while(True):
    clock.tick()
    img_byte_array = sensor.snapshot().bytearray()

    ili9341.byteswap(img_byte_array,len(img_byte_array))
    screen.send_spi(img_byte_array, True)
    print(clock.fps())

and this the drive

from machine import Pin, SPI
import time
import ustruct


class ili9341():

  @micropython.asm_thumb
  def byteswap(r0, r1):               # bytearray, len(bytearray)
    mov(r3, 1)
    lsr(r1, r3) # divide len by 2
    mov(r4, r0)
    add(r4, 1) # dest address
    label(LOOP)
    ldrb(r5, [r0, 0])
    ldrb(r6, [r4, 0])
    strb(r6, [r0, 0])
    strb(r5, [r4, 0])
    add(r0, 2)
    add(r4, 2)
    sub(r1, 1)
    bpl(LOOP)

  def send_spi(self,data, is_data):
    self.dc.value(is_data) #set data/command pin
    self.cs.value(0)
    self.hspi.write(data)
    self.cs.value(1)

  def __init__(self, cs='P3', dc='P9'):
    self.hspi = SPI(2, baudrate=54000000)
    self.cs = Pin(cs, Pin.OUT)
    self.dc = Pin(dc, Pin.OUT)

    for command, data in (
      (0xef, b'\x03\x80\x02'),
      (0xcf, b'\x00\xc1\x30'),
      (0xed, b'\x64\x03\x12\x81'),
      (0xe8, b'\x85\x00\x78'),
      (0xcb, b'\x39\x2c\x00\x34\x02'),
      (0xf7, b'\x20'),
      (0xea, b'\x00\x00'),
      (0xc0, b'\x23'),  # Power Control 1, VRH[5:0]
      (0xc1, b'\x10'),  # Power Control 2, SAP[2:0], BT[3:0]
      (0xc5, b'\x3e\x28'),  # VCM Control 1
      (0xc7, b'\x86'),  # VCM Control 2
      (0x36, b'\xF8'),  # Memory Access Control
      (0x3a, b'\x55'),  # Pixel Format
      (0xb1, b'\x00\x18'),  # FRMCTR1
      (0xb6, b'\x08\x82\x27'),  # Display Function Control
      (0xf2, b'\x00'),  # 3Gamma Function Disable
      (0x26, b'\x01'),  # Gamma Curve Selected
      (0xe0, b'\x0f\x31\x2b\x0c\x0e\x08\x4e\xf1\x37\x07\x10\x03\x0e\x09\x00'), # Set Gamma
      (0xe1, b'\x00\x0e\x14\x03\x11\x07\x31\xc1\x48\x08\x0f\x0c\x31\x36\x0f')):  # Set Gamma
      self.send_spi(bytearray([command]), False)
      self.send_spi(data, True)
    self.send_spi(bytearray([0x11]), False)
    #time.sleep(10)
    self.send_spi(bytearray([0x29]), False)


  def set_window(self, x0=0, y0=0, width=320, height=240):
    x1=x0+width-1
    y1=y0+height-1
    self.send_spi(bytearray([0x2A]),False)            # set Column addr command
    self.send_spi(ustruct.pack(">HH", x0, x1), True)  # x_end
    self.send_spi(bytearray([0x2B]),False)            # set Row addr command
    self.send_spi(ustruct.pack(">HH", y0, y1), True)  # y_end
    self.send_spi(bytearray([0x2C]),False)            # set to write to RAM

  #chuck size can be increased for faster wiring to the screen at cost of RAM
  def load_image(self, image_file, chunk_size=1024):
    BMP_file = open(image_file , "rb")
    data = BMP_file.read(54)              #seek position past header
    data = BMP_file.read(chunk_size)
    while len(data)>0 :                   #read data from file to SPI
      self.send_spi(data, True)
      data = BMP_file.read(chunk_size)
    BMP_file.close()