sudo adduser $USER dialout

sudo apt-get remove modemmanager

[779122.426847] usb 3-13.2: New USB device found, idVendor=2e8a, idProduct=000a,
bcdDevice= 1.00
[779122.426850] usb 3-13.2: New USB device strings: Mfr=1, Product=2, SerialNumb
er=3
[779122.426851] usb 3-13.2: Product: Pico
[779122.426852] usb 3-13.2: Manufacturer: Raspberry Pi
[779122.426853] usb 3-13.2: SerialNumber: 000000000000
[779122.436940] cdc_acm 3-13.2:1.0: ttyACM2: USB ACM device

ls /dev/serial/by-id/usb-Raspberry_Pi_Pico*
/dev/serial/by-id/usb-Raspberry_Pi_Pico_000000000000-if00

sudo apt install minicom lrzsz

minicom --device /dev/ttyACM0 --color=on

echo 'pu port /dev/ttyACM0' > ~/.minirc.dfl

*
* This file is based on a file originally part of the
* MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
* Copyright (c) 2019 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/

#if !defined(TINYUSB_HOST_LINKED) && !defined(TINYUSB_DEVICE_LINKED)

#include "tusb.h"
#include "pico/stdio_usb/reset_interface.h"

#define USBD_VID (0x2E8A) // Raspberry Pi
#define USBD_PID (0x000a) // Raspberry Pi Pico SDK CDC

#define TUD_RPI_RESET_DESC_LEN  9
#if !PICO_STDIO_USB_ENABLE_RESET_VIA_VENDOR_INTERFACE
#define USBD_DESC_LEN (TUD_CONFIG_DESC_LEN + TUD_CDC_DESC_LEN)
#else
#define USBD_DESC_LEN (TUD_CONFIG_DESC_LEN + TUD_CDC_DESC_LEN + TUD_RPI_RESET_DESC_LEN)
#endif
#define USBD_MAX_POWER_MA (250)

#define USBD_ITF_CDC       (0) // needs 2 interfaces
#if !PICO_STDIO_USB_ENABLE_RESET_VIA_VENDOR_INTERFACE
#define USBD_ITF_MAX       (2)
#else
#define USBD_ITF_RPI_RESET (2)
#define USBD_ITF_MAX       (3)
#endif

#define USBD_CDC_EP_CMD (0x81)
#define USBD_CDC_EP_OUT (0x02)
#define USBD_CDC_EP_IN (0x82)
#define USBD_CDC_CMD_MAX_SIZE (8)
#define USBD_CDC_IN_OUT_MAX_SIZE (64)

#define USBD_STR_0 (0x00)
#define USBD_STR_MANUF (0x01)
#define USBD_STR_PRODUCT (0x02)
#define USBD_STR_SERIAL (0x03)
#define USBD_STR_CDC (0x04)
#define USBD_STR_RPI_RESET (0x05)

// Note: descriptors returned from callbacks must exist long enough for transfer to complete

static const tusb_desc_device_t usbd_desc_device = {
   .bLength = sizeof(tusb_desc_device_t),
   .bDescriptorType = TUSB_DESC_DEVICE,
   .bcdUSB = 0x0200,
   .bDeviceClass = TUSB_CLASS_MISC,
   .bDeviceSubClass = MISC_SUBCLASS_COMMON,
   .bDeviceProtocol = MISC_PROTOCOL_IAD,
   .bMaxPacketSize0 = CFG_TUD_ENDPOINT0_SIZE,
   .idVendor = USBD_VID,
   .idProduct = USBD_PID,
   .bcdDevice = 0x0100,
   .iManufacturer = USBD_STR_MANUF,
   .iProduct = USBD_STR_PRODUCT,
   .iSerialNumber = USBD_STR_SERIAL,
   .bNumConfigurations = 1,
};

#define TUD_RPI_RESET_DESCRIPTOR(_itfnum, _stridx) \
 /* Interface */\
 9, TUSB_DESC_INTERFACE, _itfnum, 0, 0, TUSB_CLASS_VENDOR_SPECIFIC, RESET_INTERFACE_SUBCLASS, RESET_INTERFACE_PROTOCOL, _stridx,

static const uint8_t usbd_desc_cfg[USBD_DESC_LEN] = {
   TUD_CONFIG_DESCRIPTOR(1, USBD_ITF_MAX, USBD_STR_0, USBD_DESC_LEN,
       0, USBD_MAX_POWER_MA),

   TUD_CDC_DESCRIPTOR(USBD_ITF_CDC, USBD_STR_CDC, USBD_CDC_EP_CMD,
       USBD_CDC_CMD_MAX_SIZE, USBD_CDC_EP_OUT, USBD_CDC_EP_IN, USBD_CDC_IN_OUT_MAX_SIZE),

#if PICO_STDIO_USB_ENABLE_RESET_VIA_VENDOR_INTERFACE
   TUD_RPI_RESET_DESCRIPTOR(USBD_ITF_RPI_RESET, USBD_STR_RPI_RESET)
#endif
};

static const char *const usbd_desc_str[] = {
   [USBD_STR_MANUF] = "Raspberry Pi",
   [USBD_STR_PRODUCT] = "Pico",
   [USBD_STR_SERIAL] = "000000000000", // TODO
   [USBD_STR_CDC] = "Board CDC",
#if PICO_STDIO_USB_ENABLE_RESET_VIA_VENDOR_INTERFACE
   [USBD_STR_RPI_RESET] = "Reset",
#endif
};

const uint8_t *tud_descriptor_device_cb(void) {
   return (const uint8_t *)&usbd_desc_device;
}

const uint8_t *tud_descriptor_configuration_cb(uint8_t index) {
   (void)index;
   return usbd_desc_cfg;
}

const uint16_t *tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
   #define DESC_STR_MAX (20)
   static uint16_t desc_str[DESC_STR_MAX];

   uint8_t len;
   if (index == 0) {
       desc_str[1] = 0x0409; // supported language is English
       len = 1;
   } else {
       if (index >= sizeof(usbd_desc_str) / sizeof(usbd_desc_str[0])) {
           return NULL;
       }
       const char *str = usbd_desc_str[index];
       for (len = 0; len < DESC_STR_MAX - 1 && str[len]; ++len) {
           desc_str[1 + len] = str[len];
       }
   }

   // first byte is length (including header), second byte is string type
   desc_str[0] = (TUSB_DESC_STRING << 8) | (2 * len + 2);

   return desc_str;
}

#endif

/dev/serial/by-id/usb-Raspberry_Pi_Pico_000000000000-if00

screen /dev/tty.usbmodem0000000000001