Mimics the I2S/PWMAudio/Stream interface for ease of use.
* Fix non-32b DMA size transfer calculation in ABM
* Rename wasHolding to isHolding in the I2S/PWM
It is the **current** number of bits left, not the past number.
* Add commented microphone example
* Add docs
Now that we have a default parameter, need to only allow it in C++ since
default values are not part of C spec. Should not affect any users since
only legacy code is in C.
Use the PWM hardware to generate a signal suitable for filtering and
amplifying 16bps audio output.
Refactor the AudioBufferManager to allow sharing with I2S
Add example
The ring buffer worked but had issues with IRQs and the available()
procesing. Because it was a pain to debug, move to a linked list
setup where there are filled and empty buffers to work from,
simplifying the underlying logic.
Allow I2S::available() to return free writing space in OUTPUT mode
to make it saner.
* Increase default number of buffers for 32bps
Gives 2x the time between interrutps to handle I2S callbacks.
* Add setBuffers keyword
Fixes#963
The available space calculation didn't account for the fact that one
of the buffers was currently being output, causing ::available() to
be too large and ::write() to block in that case.
* Add support for the WiFi chip on the Pico W board.
* USB interrupt now no longer hard coded (conflicted with the WiFi IRQ).
* Add in Pico W board to makeboards.py
* Add in GPIO and variant support
* Initialize WiFi in the Variant
* Use manual LWIP, fix size accounting
* Remove the SDK WiFi overrides
* Pulling in work done in the ESP8266 core.
* Make IPAddress support IPv6
* Build LWIP with IPv4 and IPv6 support
* Use proper MAC
* Avoid cyw_warn crash. Make macro to a comment while building
* Add WiFiServer
* Add WiFiUdp
* Move LWIP-specific support files to LWIP_Ethernet
* Add WiFi::ping (ICMP ping)
* Move ICMP echo (ping) to LWIPIntfDev
* Move hostByName to LwipIntfDev
* Add AP mode with simple DHCP server
* Add some examples and basic ESP8266 compat hacks
* Update Adafruit TinyUSB to fix crash
* Set DHCP hostname
* Make Wifi.begin() return CONNECTED with link + IP
* Return connected() on WiFi::begin
* Fix spurious TCP retransmission
* Protect LWIP from reentrancy
The Pico SDK calls "sys_check_timeouts() from inside a periodic interrupt.
This appears unsafe, as the interrupt could happen while already in the
(non-reentrant) LWIP code.
Block the interrupt from calling sys_check_timeouts by using a global flag
manually set via an RAII recursive lock.
Add interrupt protection macros around critical sections inside LWIP via
the standard defines.
These two changes should make LWIP significantly more stable and long
running.
* Support disconnecting and reconnecting WiFi
* Add WiFiServer simple example
* Update documentation
Fixes#666Fixed#665
Rewrite the I2S code from scratch to eliminate the dependence on the
pico-extras implementation and to support I2S input as well.
8-bit, 16-bit, 24-bit, and 32-bit words are supported.
Multiple I2S ports are allowed (theoretically up to 6 because
2 DMA channels are required per port).
I2S input and I2S output are supported.
Add input example
Fixes#535Fixes#99Fixes#562
Adds code to define which pins are used, moving them from the defaults, which are the same as the only three analogue input pins, and adding comments to explain how to change them.
The original didn't give any clues about which pins were used, which isn't ideal for a beginner - it was necessary to look at the code for the library, to work that out.
The new code redundantly defines a pWS pin number (as pBCLK+1), which isn't used in the example, but is meant as a reminder to the person using it, of how to wire up WS.
Fixes#167
For Serial when selecting TinyUSB. Can't include in the core because Arduino IDE
will not link in libraries called from the core. Instead, add the header to all
the standard libraries in the hope it will still catch some user cases where they
use these libraries.
See https://github.com/earlephilhower/arduino-pico/issues/167#issuecomment-848622174
