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History

Darian Leung 7f09fe1b23 usb: USB Host stack uses USB PHY driver This commit updates the USB Host stack to use the USB PHY driver. The USB PHY and the OTG Controller should now both be setup/deleted using usb_new_phy() and usb_del_phy() respectively. - The hcd_install() now expects the USB PHY and OTG Contorller to be already setup before it is called - usb_host_install() now has an option to skip calling usb_del_phy() if the user wants to setup their own USB PHY (e.g., in the case of using and external PHY). - CDC-ACM and MSC examples/test updated to use internal PHY Closes https://github.com/espressif/esp-idf/issues/8061		2022-02-18 15:51:05 +08:00
..
main	usb: USB Host stack uses USB PHY driver	2022-02-18 15:51:05 +08:00
CMakeLists.txt	usb: Add USB host CDC-ACM class driver	2021-12-10 10:04:16 +01:00
README.md	usb: Add USB host CDC-ACM class driver	2021-12-10 10:04:16 +01:00

README.md

Supported Targets	ESP32-S2	ESP32-S3

USB CDC-ACM Host Driver BG96 Example

(See the README.md file in the upper level 'examples' directory for more information about examples.)

This example shows how to set up ESP chip to interface with CDC-like device by using the CDC-ACM Host Driver. CDC-like devices implement a Vendor-specific class, and support a subset of the functions of a fully compliant CDC-ACM device.

How to use example

Hardware Required

Any ESP board with USB-OTG supported and a Quectel BG96 LTE/GPS modem.

Connect USB_D+, USB_D-, GND and +5V signals of ESP board to BG96.

Note: Quectel BG96 modem must be started after power-up by applying low pulse on PWRKEY (pin 15).

Pin Assignment

See common pin assignments for USB Device examples from upper level.

Build and Flash

Build the project and flash it to the board, then run monitor tool to view serial output:

idf.py -p PORT flash monitor

(Replace PORT with the name of the serial port to use.)

(To exit the serial monitor, type Ctrl-].)

See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.

Example Output

After the flashing you should see the output at idf monitor:

I (276) BG96: USB Host installed
I (24446) AT: ATE0
I (24446) AT: 
OK

I (24526) AT: 
+QIND: SMS DONE

I (24646) AT: 
APP RDY

I (25446) BG96: Sending AT
I (25446) AT: 
OK

I (26446) BG96: Enabling GNSS
I (26446) AT: 
OK

GPVTG Sentence:
  Track [deg]:   0.00
  Speed [kmph]:  0.00
  Speed [knots]: 0.00
GPGSA Sentence:
  Mode: A
  Fix:  1
  PDOP: 0.00
  HDOP: 0.00
  VDOP: 0.00
GPGGA sentence
Number of satellites: 0
Altitude: 0.000000
GPRMC sentence
Longitude:
  Degrees: 0
  Minutes: 0.000000
  Cardinal:
Latitude:
  Degrees: 0
  Minutes: 0.000000
  Cardinal: 
Date & Time: 00 Jan 00:00:00 1900
Speed, in Knots: 0.000000
Track, in degrees: 0.000000
Magnetic Variation:
  Degrees: 0.000000
  Cardinal: 
Invalid Magnetic Variation Direction!
Adjusted Track (heading): 0.000000
I (27446) BG96: Sending AT+GSN
I (27446) AT: 
860517045660414

OK
...