Change default pins in examples to use named pins

Author: sfe-SparkFro

red_vision_examples/ex08_high_fps_camera.py

@@ -30,6 +30,7 @@
 
 # Import machine and rp2 for I2C and PIO.
 import machine
+from machine import Pin
 import rp2
 i2c = machine.I2C()
 rp2.PIO(1).gpio_base(16)
@@ -61,8 +62,8 @@
     spi = machine.SPI(
         baudrate = 24_000_000,
     ),
-    pin_dc = 20,
-    pin_cs = 21,
+    pin_dc = Pin.board.DISPLAY_DC,
+    pin_cs = Pin.board.DISPLAY_CS,
 )
 driver_display = rv.displays.ST7789(
     interface = interface_display,
@@ -78,11 +79,11 @@
 # color format.
 interface_camera = rv.cameras.DVP_RP2_PIO(
     sm_id = 5,
-    pin_d0 = 28,
-    pin_vsync = 42,
-    pin_hsync = 41,
-    pin_pclk = 40,
-    pin_xclk = 44, # Specify the XCLK pin if needed by your camera.
+    pin_d0 = Pin.board.CAMERA_D0,
+    pin_vsync = Pin.board.CAMERA_VSYNC,
+    pin_hsync = Pin.board.CAMERA_HSYNC,
+    pin_pclk = Pin.board.CAMERA_PCLK,
+    pin_xclk = Pin.board.CAMERA_XCLK, # Specify the XCLK pin if needed.
 )
 driver_camera = rv.cameras.OV5640(
     interface = interface_camera,

red_vision_examples/rv_init/camera.py

@@ -15,6 +15,9 @@
 # Import the Red Vision package.
 import red_vision as rv
 
+# Import the Pin class for the board's default pins.
+from machine import Pin
+
 ################################################################################
 # DVP Camera
 ################################################################################
@@ -29,13 +32,13 @@
 # PIO interface, only available on Raspberry Pi RP2 processors.
 interface = rv.cameras.DVP_RP2_PIO(
     sm_id = 5,
-    pin_d0 = 28,
-    pin_vsync = 42,
-    pin_hsync = 41,
-    pin_pclk = 40,
+    pin_d0 = Pin.board.CAMERA_D0,
+    pin_vsync = Pin.board.CAMERA_VSYNC,
+    pin_hsync = Pin.board.CAMERA_HSYNC,
+    pin_pclk = Pin.board.CAMERA_PCLK,
 
     # Optionally specify the XCLK pin if needed by your camera.
-    pin_xclk = 44,
+    # pin_xclk = Pin.board.CAMERA_XCLK,
 )
 
 ##########

red_vision_examples/rv_init/display.py

@@ -15,6 +15,9 @@
 # Import the Red Vision package.
 import red_vision as rv
 
+# Import the Pin class for the board's default pins.
+from machine import Pin
+
 ################################################################################
 # SPI Display
 ################################################################################
@@ -30,18 +33,18 @@
 # the fastest option (24Mbps on RP2350).
 interface = rv.displays.SPI_Generic(
     spi = spi,
-    pin_dc = 20,
-    pin_cs = 21,
+    pin_dc = Pin.board.DISPLAY_DC,
+    pin_cs = Pin.board.DISPLAY_CS,
 )
 
 # PIO interface. This is only available on Raspberry Pi RP2 processors,
 # but is much faster than the SPI interface (75Mbps on RP2350).
 # interface = rv.displays.SPI_RP2_PIO(
 #     sm_id = 4,
-#     pin_clk = 22,
-#     pin_tx = 23,
-#     pin_dc = 20,
-#     pin_cs = 21,
+#     pin_clk = Pin.board.DISPLAY_CLK,
+#     pin_tx = Pin.board.DISPLAY_TX,
+#     pin_dc = Pin.board.DISPLAY_DC,
+#     pin_cs = Pin.board.DISPLAY_CS,
 # )
 
 ##########

red_vision_examples/rv_init/sd_card.py

@@ -11,7 +11,7 @@
 # specific board and configuration.
 #-------------------------------------------------------------------------------
 
-# Import the Pin class for the chip select pin
+# Import the Pin class for the board's default pins.
 from machine import Pin
 
 # Import the SPI bus
@@ -25,8 +25,8 @@
 spi_str = str(spi)
 baudrate = int(spi_str[spi_str.index("baudrate=") + 9:].partition(",")[0])
 
-# Set the chip select pin for the SD card
-sd_cs = Pin(7, Pin.OUT)
+# Set the chip select pin for the SD card.
+sd_cs = Pin(Pin.board.SD_CS, Pin.OUT)
 
 try:
     # Import the SD card module. This is often not installed by default in