276 lines
7.5 KiB
ReStructuredText
276 lines
7.5 KiB
ReStructuredText
==============
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ESP-WROVER-KIT
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==============
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The `ESP-WROVER-KIT <https://docs.espressif.com/projects/esp-idf/en/latest/esp32/hw-reference/esp32/get-started-wrover-kit.html>`_ is a development board for the ESP32 SoC from Espressif, based on a ESP32-WROVER-B module.
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.. list-table::
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:align: center
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* - .. figure:: esp-wrover-kit-v4.1-layout-back.png
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:align: center
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ESP-WROVER-KIT board layout - front
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- .. figure:: esp-wrover-kit-v4.1-layout-front.png
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:align: center
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ESP-WROVER-KIT board layout - back
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Features
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========
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- ESP32-WROVER-B module
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- LCD screen
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- MicroSD card slot
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Its another distinguishing feature is the embedded FTDI FT2232HL chip,
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an advanced multi-interface USB bridge. This chip enables to use JTAG
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for direct debugging of ESP32 through the USB interface without a separate
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JTAG debugger. ESP-WROVER-KIT makes development convenient, easy, and
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cost-effective.
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Most of the ESP32 I/O pins are broken out to the board's pin headers for easy access.
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Serial Console
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==============
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UART0 is, by default, the serial console. It connects to the on-board
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FT2232HL converter and is available on the USB connector USB CON8 (J5).
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It will show up as /dev/ttyUSB[n] where [n] will probably be 1, since
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the first interface ([n] == 0) is dedicated to the USB-to-JTAG interface.
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Buttons and LEDs
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================
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Board Buttons
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-------------
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There are two buttons labeled Boot and EN. The EN button is not available
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to software. It pulls the chip enable line that doubles as a reset line.
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The BOOT button is connected to IO0. On reset it is used as a strapping
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pin to determine whether the chip boots normally or into the serial
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bootloader. After reset, however, the BOOT button can be used for software
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input.
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Board LEDs
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----------
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There are several on-board LEDs for that indicate the presence of power
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and USB activity.
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There is an RGB LED available for software.
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Pin Mapping
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===========
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===== ========================= ==========
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Pin Signal Notes
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===== ========================= ==========
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0 RGB LED Red / BOOT Button
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2 RGB LED Green
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4 RGB LED Blue
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5 LCD Backlight
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18 LCD Reset
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19 LCD Clock
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21 LCD D/C
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22 LCD CS
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23 LCD MOSI
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25 LCD MISO
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===== ========================= ==========
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Configurations
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==============
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All of the configurations presented below can be tested by running the following commands::
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$ ./tools/configure.sh esp32-wrover-kit:<config_name>
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$ make flash ESPTOOL_PORT=/dev/ttyUSB1 -j
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Where <config_name> is the name of board configuration you want to use, i.e.: nsh, buttons, wifi...
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Then use a serial console terminal like ``picocom`` configured to 115200 8N1.
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autopm
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------
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This configuration makes the device automatically enter the low power consumption mode
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when in the idle state, powering off the cpu and other peripherals.
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In minimum power save mode, the station wakes up every DTIM to receive a beacon. The broadcast
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data will not be lost because it is transmitted after DTIM. However, it can not save much more
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power if DTIM is short as the DTIM is determined by the access point.
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bmp180
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------
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This configuration enables the use of the BMP180 pressure sensor over I2C.
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You can check that the sensor is working by using the ``bmp180`` application::
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nsh> bmp180
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Pressure value = 91531
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Pressure value = 91526
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Pressure value = 91525
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buttons
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-------
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This configuration shows the use of the buttons subsystem. It can be used by executing
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the ``buttons`` application and pressing on any of the available board buttons::
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nsh> buttons
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buttons_main: Starting the button_daemon
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buttons_main: button_daemon started
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button_daemon: Running
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button_daemon: Opening /dev/buttons
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button_daemon: Supported BUTTONs 0x01
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nsh> Sample = 1
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Sample = 0
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gpio
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----
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This is a test for the GPIO driver. It includes the 3 LEDs and one, arbitrary, GPIO.
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For this example, GPIO22 was used (defined by the board implementation).
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At the nsh, we can turn LEDs on and off with the following::
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nsh> gpio -o 1 /dev/gpio0
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nsh> gpio -o 0 /dev/gpio0
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We can use the interrupt pin to send a signal when the interrupt fires::
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nsh> gpio -w 14 /dev/gpio2
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The pin is configured to as a rising edge interrupt, so after issuing the
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above command, connect it to 3.3V.
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lcd1602
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-------
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This configuration is used to demonstrate the use of an LCD1602 display with
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the ESP32-WROVER-KIT. You can run an example by executing the following commands::
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nsh> slcd
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Opening /dev/slcd0 for read/write access
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Attributes:
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rows: 2 columns: 16 nbars: 0
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max contrast: 0 max brightness: 1
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Clear screen
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WRITING:
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0000: 1b5b46 .[F
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Set brightness to 1
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Print [Hello]
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WRITING:
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0000: 1b5b471b5b30304c1b5b4548656c6c6f .[G.[00L.[EHello
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leds
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----
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This configuration demonstrates the use of the on-board RGB LED with the
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`userleds` subsystem. To check the included example, you can execute the
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following application::
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nsh> leds
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leds_main: Starting the led_daemon
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leds_main: led_daemon started
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led_daemon (pid# 3): Running
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led_daemon: Opening /dev/userleds
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led_daemon: Supported LEDs 0x07
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led_daemon: LED set 0x01
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nsh> led_daemon: LED set 0x02
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led_daemon: LED set 0x03
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led_daemon: LED set 0x04
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led_daemon: LED set 0x05
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lua
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---
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This configuration demonstrates the use of the of the Lua interpreter on NuttX.
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To execute it, just run the ``lua`` application.
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lvgl
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----
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This is a demonstration of the LVGL graphics library running on the NuttX LCD
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driver. You can find LVGL here::
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https://www.lvgl.io/
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https://github.com/lvgl/lvgl
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This configuration uses the LVGL demonstration at `apps/examples/lvgldemo`.
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mmcsdspi
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--------
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This configuration is used to mount a FAT/FAT32 SD Card into the OS' filesystem.
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To access the card's files, execute the following commands::
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nsh> mount -t vfat /dev/mmcsd0 /mnt
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nsh> ls /mnt/
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/mnt:
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song_16_88200_2ch.wav
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song_16_96000_2ch.wav
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song_24_44100_2ch.wav
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song_32_44100_2ch.wav
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nsh
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---
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Basic NuttShell configuration (console enabled in UART0, exposed via
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USB connection by means of FT2232HL converter, at 115200 bps).
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nx
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--
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This config adds a set of tests using the graphic examples at ``apps/example/nx``.
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This configuration illustrates the use of the LCD with the lower performance
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SPI interface.
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oneshot
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-------
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This config demonstrate the use of oneshot timers present on the ESP32.
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To test it, just run the ``oneshot`` example::
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nsh> oneshot
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Opening /dev/oneshot
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Maximum delay is 4294967295999999
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Starting oneshot timer with delay 2000000 microseconds
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Waiting...
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Finished
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rtc
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---
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This configuration demonstrates the use of the RTC driver through alarms.
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You can set an alarm, check its progress and receive a notification after it expires::
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nsh> alarm 10
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alarm_daemon started
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alarm_daemon: Running
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Opening /dev/rtc0
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Alarm 0 set in 10 seconds
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nsh> alarm -r
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Opening /dev/rtc0
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Alarm 0 is active with 10 seconds to expiration
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nsh> alarm_daemon: alarm 0 received
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wifi
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----
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Enables Wi-Fi support. You can define your credentials this way::
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$ make menuconfig
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-> Application Configuration
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-> Network Utilities
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-> Network initialization (NETUTILS_NETINIT [=y])
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-> WAPI Configuration
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Or if you don't want to keep it saved in the firmware you can do it
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at runtime::
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nsh> wapi psk wlan0 mypasswd 3
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nsh> wapi essid wlan0 myssid 1
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nsh> renew wlan0 |