Enable with ./tools/configure.sh -l esp32-devkitc:dac
DAC channel 0 = GPIO 25
DAC channel 1 = GPIO 26
default path: /dev/dac0
Resolution 8 bits = values 0~255
Voltage: 0~Vref
The reference voltage 'Vref' here is input from the pin VDD3P3_RTC
which ideally equals to the power supply VDD (3.3V).
This commit provides an interface to register ISRs that run from
IRAM and keeps track of the non-IRAM interrupts. It enables, for
instance, to avoid disabling all the interrupts during a SPI flash
operation: IRAM-enabled ISRs are, then, able to run during these
operations.
It also makes the code look more similar to the ESP32-S3 SPI flash
implementation by creating a common `esp32_spiflash_init` that is
responsible to create the SPI flash operation tasks. The function
intended to initialize the SPI flash partions was, then, renamed to
`board_spiflash_init`.
- Add ioctl method to enable allocating the apb buffer.
- Add RX methods to set data width, sample rate, channels and
for receiving data from the I2S peripheral.
- Update the i2schar defconfig to enable the I2S receiver.
- Add nxlooper defconfig to enable testing the RX interface.
- Add specific bindings on ESP32 bringup to enable nxlooper
to work without the need of any specific codec.
Add initial support for the I2S peripheral on ESP32.
Add I2S character driver and generic I2S audio driver.
Include i2schar defconfig for ESP32-DevKitC board.
- Introduce the ESP32_WIFI option to replace the broader
ESP32_WIRELESS option. ESP32_WIRELESS is used by both WIFI and BLE.
- Move common functions from esp32_wifi_adapter to esp32_wireless.
- Change the order of including the external libraries to avoid undefined references.
Signed-off-by: Abdelatif Guettouche <abdelatif.guettouche@espressif.com>
```
board/esp32_bringup.c: In function 'esp32_bringup':
board/esp32_bringup.c:171:9: error: implicit declaration of function 'esp32_efuse_initialize'; did you mean 'esp32_mmcsd_initialize'? [-Werror=implicit-function-declaration]
ret = esp32_efuse_initialize("/dev/efuse");
^~~~~~~~~~~~~~~~~~~~~~
esp32_mmcsd_initialize
```
During the lcd1602 tests on our internal CI we noticed that the
lcd1602 was failing because there is not a I2C display in the
emulated board on QEMU. It is better to remove the "return ret"
from the bringup because the user will see the error anyway.
