samples: sensortile_box: use generic CDC ACM shield

Remove CDC ACM UART devicetree overlay, and explicit
USB support initialization in favor of generic CDC ACM shield.
For console support via USB CDC ACM, this example is to be built
as follows:

west build -b sensortile_box
  samples/boards/sensortile_box -- -DSHIELD=cdc_acm_console

Signed-off-by: Johann Fischer <[email protected]>

Author: jfischer-no

samples/boards/sensortile_box/README.rst

@@ -37,6 +37,7 @@ Build and flash the sample in the following way:
 .. zephyr-app-commands::
     :zephyr-app: samples/boards/sensortile_box
     :board: sensortile_box
+    :shield: cdc_acm_console
     :goals: build flash
 
 Please note that flashing the board requires a few preliminary steps described

samples/boards/sensortile_box/app.overlay

@@ -16,12 +16,9 @@ CONFIG_STTS751_TRIGGER_NONE=y
 CONFIG_IIS3DHHC_TRIGGER_OWN_THREAD=y
 CONFIG_LIS2MDL_TRIGGER_NONE=y
 
-# config USB and USB console
+# config USB device support
 CONFIG_USB_DEVICE_VID=0x0483
 CONFIG_USB_DEVICE_PID=0x1234
-CONFIG_USB_DEVICE_STACK=y
 CONFIG_USB_DEVICE_PRODUCT="Zephyr CDC SensorTile.box"
 
-CONFIG_UART_INTERRUPT_DRIVEN=y
-CONFIG_UART_LINE_CTRL=y
 CONFIG_CBPRINTF_FP_SUPPORT=y

samples/boards/sensortile_box/prj.conf

@@ -7,3 +7,4 @@ tests:
     platform_allow: sensortile_box
     tags: sensors
     depends_on: i2c spi gpio
+    extra_args: SHIELD="cdc_acm_console"

samples/boards/sensortile_box/sample.yaml

@@ -256,8 +256,7 @@ void main(void)
 	int cnt = 1;
 	uint32_t dtr = 0;
 
-	/* Application must enable USB by itself */
-	if (!device_is_ready(dev) || usb_enable(NULL)) {
+	if (!device_is_ready(dev)) {
 		return;
 	}