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Author: PauloCardosoC

lib/st7789py_parallel.py

@@ -0,0 +1,209 @@
+# Extended Class to use TFT ST7789 in parallel bus
+
+from micropython import const
+from utime import sleep_ms, sleep_us
+from machine import Pin
+
+## Pins (wiring) example and description
+#ST7789        STM32F407VGT6
+#LCD_RST <---> 3.3V            #LCD reset control pin, active low, used to force a hardware reset of the board, if unused need be plug on 3.3V 
+#LCD_CS  <---> GND             #LCD chip select control pin, active low, if used only one LCD can be plug on GND
+#LCD_RS  <---> PD13            #LCD register command / data selection control pin, comand active low, data active high
+#LCD_WR  <---> PD5             #LCD write control pin, active low
+#LCD_RD  <---> PD4             #LCD read control pin, active low
+#GND     <---> GND
+#5V      <---> 5V
+
+#LCD_D2  <---> PD0
+#LCD_D3  <---> PD1
+#LCD_D4  <---> PE7
+#LCD_D5  <---> PE8
+#LCD_D6  <---> PE9
+#LCD_D7  <---> PE10
+#LCD_D0  <---> PD14
+#LCD_D1  <---> PD15
+
+## DEFINE PINS CONST
+_LCD_RST       = const(None)      #LCD reset control pin, active low
+_LCD_CS        = const(None)      #LCD chip select control pin, active low
+_LCD_RS        = const(4)         #LCD register command / data selection control pin, comand active low, data active high
+_LCD_WR        = const(5)         #LCD write control pin, active low
+_LCD_RD        = const(None)      #LCD read control pin, active low
+
+_LCD_D0        = const(12)
+_LCD_D1        = const(_LCD_D0 + 1)
+_LCD_D2        = const(_LCD_D0 + 2)
+_LCD_D3        = const(_LCD_D0 + 3)
+_LCD_D4        = const(_LCD_D0 + 4)
+_LCD_D5        = const(_LCD_D0 + 5)
+_LCD_D6        = const(_LCD_D0 + 6)
+_LCD_D7        = const(_LCD_D0 + 7)
+
+## ESP32 GPIO REGISTERS
+_ESP32_GPIO_OUT_REG       = const(0x3FF44004)  # GPIO0-31 output value. (R/W), 32 bits from rigth to left ref pins numbers from 0 to 31
+_ESP32_GPIO_OUT_W1TS_REG  = const(0x3FF44008)  # GPIO0-31 output set register. For every bit that is 1 in the value written here, the corresponding bit in GPIO_OUT_REG will be set. (WO)
+_ESP32_GPIO_OUT_W1TC_REG  = const(0x3FF4400C)  # GPIO0-31 output clear register. For every bit that is 1 in the value written here, the corresponding bit in GPIO_OUT_REG will be cleared. (WO)
+
+_ESP32_GPIO_OUT1_REG       = const(0x3FF44010)  # GPIO32-39 output value. (R/W), 32 bits from rigth to left ref pins numbers from 32 to 39
+_ESP32_GPIO_OUT1_W1TS_REG  = const(0x3FF44014)  # GPIO32-39 output set register. For every bit that is 1 in the value written here, the corresponding bit in GPIO_OUT_REG will be set. (WO)
+_ESP32_GPIO_OUT1_W1TC_REG  = const(0x3FF44018)  # GPIO32-39 output clear register. For every bit that is 1 in the value written here, the corresponding bit in GPIO_OUT_REG will be cleared. (WO)
+
+_ESP32_GPIO_IN_REG        = const(0x3FF4403C)  #GPIO 0-31 input register (RO)
+_ESP32_GPIO_IN1_REG       = const(0x3FF44040)  #GPIO 32-39 input register (RO)
+
+from st7789py import *
+
+_ENCODE_PIXEL = const(">H")
+_ENCODE_POS = const(">HH")
+_DECODE_PIXEL = const(">BBB")
+
+def _encode_pos(x, y):
+    """Encode a postion into bytes."""
+    return struct.pack(_ENCODE_POS, x, y)
+
+
+def _encode_pixel(color):
+    """Encode a pixel color into bytes."""
+    return struct.pack(_ENCODE_PIXEL, color)
+
+class ST7789_PARALLEL(ST7789):
+    def __init__(self, width:(int) = 320, height:(int) = 240, rotation=0,
+                       rst_pin:(int,None) = _LCD_RST, #             LCD reset control pin
+                       cs_pin:(int,None)  = _LCD_CS,  #             LCD chip select control pin
+                       rs_pin:(int,None)  = _LCD_RS,  #**Required** LCD register command / data selection control pin,
+                       wr_pin:(int,None)  = _LCD_WR,  #**Required** LCD write control pin, active low
+                       rd_pin:(int,None)  = _LCD_RD,  #             LCD read control pin, active low
+                       d0_pin:(int,None)  = _LCD_D0   #**Required** LCD D0 pin, all otherpins will be pick seguentially after this.
+                       ):
+        if height != 240 or width not in [320, 240, 135]:
+            raise ValueError("Unsupported display. 320x240, 240x240 and 135x240 are supported.")
+        if rs_pin is None:
+            raise ValueError("rs pin (data/command) is required.")
+        if d0_pin is None or (d0_pin + 8) > 31 :
+            raise ValueError("d0_pin is required, need to be continuos and bellow 23, the rest of data pins will be assign seguentially, ex, d0_pin = 12, d1_pin=13, ... ")
+        
+        for x in (rst_pin, cs_pin, rs_pin, wr_pin, rd_pin, d0_pin):
+            if x != None and ((x<0) or (x>44)) :
+                raise ValueError("Pins numbers need to between 0 and 44")
+        
+        
+        self.rst_pin_mask = self.cs_pin_mask = self.rs_pin_mask = (_ESP32_GPIO_OUT_REG, 0b0)
+        self.wr_pin_mask = self.rd_pin_mask = self.d_pin_mask = self.rst_pin_mask
+    
+        self.rst_pin = self.reset = rst_pin 
+        if rst_pin != None :
+            self.rst_pin = self.reset = Pin(rst_pin, Pin.OUT, value=1)
+            if rst_pin < 32 :
+                self.rst_pin_mask = (_ESP32_GPIO_OUT_REG, 1 << rst_pin)
+            else :
+                self.rst_pin_mask = (_ESP32_GPIO_OUT1_REG, 1 << rst_pin-32)
+
+        self.cs_pin = self.cs = cs_pin
+        if cs_pin != None :
+            self.cs_pin = self.cs = Pin(cs_pin,Pin.OUT, value=1)
+            if cs_pin < 32 :
+                self.cs_pin_mask = (_ESP32_GPIO_OUT_REG, 1 << cs_pin)
+            else :
+                self.cs_pin_mask = (_ESP32_GPIO_OUT1_REG, 1 << cs_pin-32)
+        
+        self.rs_pin = self.dc = rs_pin
+        if rs_pin != None :
+            self.rs_pin = self.dc = Pin(rs_pin, Pin.OUT, value=0)
+            if rs_pin < 32 :
+                self.rs_pin_mask = (_ESP32_GPIO_OUT_REG, 1 << rs_pin)
+            else :
+                self.rs_pin_mask = (_ESP32_GPIO_OUT1_REG, 1 << rs_pin-32)
+        
+        self.wr_pin = wr_pin
+        if wr_pin != None :
+            self.wr_pin = Pin(wr_pin, Pin.OUT, value=1)
+            if wr_pin < 32 :
+                self.wr_pin_mask = (_ESP32_GPIO_OUT_REG, 1 << wr_pin)
+            else :
+                self.wr_pin_mask = (_ESP32_GPIO_OUT1_REG, 1 << wr_pin-32)
+        
+        self.rd_pin = rd_pin
+        if rd_pin != None :
+            self.rd_pin = Pin(rd_pin, Pin.OUT, value=1)
+            if rd_pin < 32 :
+                self.rd_pin_mask = (_ESP32_GPIO_OUT_REG, 1 << rd_pin)
+            else :
+                self.rd_pin_mask = (_ESP32_GPIO_OUT1_REG, 1 << rd_pin-32)
+        
+        self.d_pin = []
+        for x in range(0, 8) :
+            self.d_pin.append(Pin(d0_pin + x, Pin.OUT, value=0))
+        self.d_pin_mask = (_ESP32_GPIO_OUT_REG, 0b11111111 << d0_pin)
+        self.d0_pin = d0_pin
+
+        self._display_width = self.width = width
+        self._display_height = self.height = height
+        self.xstart = 0
+        self.ystart = 0
+        
+        self.backlight = None
+        self._rotation = rotation % 4
+
+        self.hard_reset()
+        self.soft_reset()
+        self.sleep_mode(False)
+
+        self._set_color_mode(COLOR_MODE_65K | COLOR_MODE_16BIT)
+        time.sleep_ms(50)
+        self.rotation(self._rotation)
+        self.inversion_mode(False)
+        time.sleep_ms(10)
+        self._write(ST7789_NORON)
+        time.sleep_ms(10)
+        self.fill(0)
+        self._write(ST7789_DISPON)
+        time.sleep_ms(500)
+
+    @micropython.viper
+    def _write_v(self, data: ptr8, size:int, repeat:int):
+        gpio_data   = ptr32(self.d_pin_mask[0])
+        gpio_wr     = ptr32(self.wr_pin_mask[0])
+        wr_pin_mask = int(self.wr_pin_mask[1])
+        d_pin_mask  = int(self.d_pin_mask[1])
+        d0_pin      = int(self.d0_pin)
+        for _ in range(0,repeat):
+            for x in range(0,size):
+                gpio_data[2] = d_pin_mask
+                gpio_data[1] = int(data[x] << d0_pin)
+                gpio_wr[2] = wr_pin_mask
+                gpio_wr[1] = wr_pin_mask
+
+    @micropython.native
+    def _write(self, command=None, data=None, repeat=1):
+        """ParallelSPI write to the device: commands and data."""
+        if self.cs:
+            self.cs.off()
+
+        if command is not None:
+            self.dc.off()
+            if command is not None:
+                command=bytearray([command])
+                self._write_v(command,len(command), repeat)
+        if data is not None:
+            self.dc.on()
+            if data is not None:
+                self._write_v(data,len(data), repeat)
+            if self.cs:
+                self.cs.on()
+        
+    def fill_rect(self, x, y, width, height, color):
+        """
+        Draw a rectangle at the given location, size and filled with color.
+
+        Args:
+            x (int): Top left corner x coordinate
+            y (int): Top left corner y coordinate
+            width (int): Width in pixels
+            height (int): Height in pixels
+            color (int): 565 encoded color
+        """
+        self._set_window(x, y, x + width - 1, y + height - 1)
+        pixel = _encode_pixel(color)
+        
+        self._write(None,pixel,width * height)
+