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samples: usb: console: get CDC ACM UART device from devicetree

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Add app.overlay which contains chosen node and cdc-acm-uart node.
Rework sample to get CDC ACM UART device from devicetree.

Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
This commit is contained in:
Johann Fischer 2021-07-20 16:46:02 +02:00 • committed by Christopher Friedt
commit c3f87d9247
3 changed files with 27 additions and 17 deletions
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18
samples/subsys/usb/console/app.overlay Normal file
View file

@ -0,0 +1,18 @@
/*
* Copyright (c) 2021 Nordic Semiconductor ASA
*
* SPDX-License-Identifier: Apache-2.0
*/
/ {
chosen {
zephyr,console = &cdc_acm_uart0;
};
};
&zephyr_udc0 {
cdc_acm_uart0: cdc_acm_uart0 {
compatible = "zephyr,cdc-acm-uart";
label = "CDC_ACM_0";
};
};

5
samples/subsys/usb/console/prj.conf
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@ -1,7 +1,6 @@
CONFIG_USB_DEVICE_STACK=y
CONFIG_USB_DEVICE_PRODUCT="Zephyr USB console sample"
CONFIG_USB_UART_CONSOLE=y
CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_SERIAL=y
CONFIG_UART_LINE_CTRL=y
CONFIG_UART_CONSOLE_ON_DEV_NAME="CDC_ACM_0"
CONFIG_USB_UART_CONSOLE=y

21
samples/subsys/usb/console/src/main.c
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@ -6,33 +6,26 @@
#include <zephyr.h>
#include <sys/printk.h>
#include <sys/util.h>
#include <string.h>
#include <usb/usb_device.h>
#include <drivers/uart.h>
BUILD_ASSERT(DT_NODE_HAS_COMPAT(DT_CHOSEN(zephyr_console), zephyr_cdc_acm_uart),
"Console device is not ACM CDC UART device");
void main(void)
{
const struct device *dev = device_get_binding(
CONFIG_UART_CONSOLE_ON_DEV_NAME);
const struct device *dev = DEVICE_DT_GET(DT_CHOSEN(zephyr_console));
uint32_t dtr = 0;
if (usb_enable(NULL)) {
return;
}
/* Poll if the DTR flag was set, optional */
/* Poll if the DTR flag was set */
while (!dtr) {
uart_line_ctrl_get(dev, UART_LINE_CTRL_DTR, &dtr);
}
if (strlen(CONFIG_UART_CONSOLE_ON_DEV_NAME) !=
strlen("CDC_ACM_0") ||
strncmp(CONFIG_UART_CONSOLE_ON_DEV_NAME, "CDC_ACM_0",
strlen(CONFIG_UART_CONSOLE_ON_DEV_NAME))) {
printk("Error: Console device name is not USB ACM\n");
return;
/* Give CPU resources to low priority threads. */
k_sleep(K_MSEC(100));
}
while (1) {