Change default sm_id values of PIO drivers

Camera drivers no longer have a default, must be specified
Example driver initialization now uses sm_id 4 and 5 to not conflict with XRP's encoders

Author: sfe-SparkFro

cv2_drivers/cameras/hm01b0_pio.py

@@ -10,9 +10,9 @@ def __init__(
         pin_vsync,
         pin_hsync,
         pin_pclk,
+        sm_id,
         pin_xclk = None,
         xclk_freq = 25_000_000,
-        sm_id = 0,
         num_data_pins = 1,
         i2c_address = 0x24,
     ):

cv2_drivers/cameras/ov5640_pio.py

@@ -10,9 +10,9 @@ def __init__(
         pin_vsync,
         pin_hsync,
         pin_pclk,
+        sm_id,
         pin_xclk = None,
         xclk_freq = 5_000_000,
-        sm_id = 0,
         i2c_address = 0x3c
     ):
         # Create the frame buffer

examples/cv2_hardware_init/camera.py

@@ -19,6 +19,7 @@
     pin_vsync = 13,
     pin_hsync = 14,
     pin_pclk = 15,
+    sm_id = 5,
     pin_xclk = None, # Optional xclock pin, specify if needed
     num_data_pins = 1 # Number of data pins used by the camera (1, 4, or 8)
 )

examples/cv2_hardware_init/display.py

@@ -28,7 +28,7 @@
 # display = st7789_pio.ST7789_PIO(
 #     width = 240,
 #     height = 320,
-#     sm_id = 1,
+#     sm_id = 4,
 #     pin_clk = 18,
 #     pin_tx = 19,
 #     pin_dc = 16,