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Allow GPIO 9 and 10 for waveform generation (#5055)

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* Allow GPIO 9 and 10 for waveform generation

While most ESP8266 modules use quad-io mode for their SPI flash ROM,
there are some which only use dual-io mode.  Allow the unused pins
(GPIO 9 and 10) to have waveforms generated on them.  Should the user try
this on a quad-io mode board, expect very bad things to happen.

* Add variant for 8285 to init GPIO 9/10

The 8285 only has 2-bit flash IO, so the other two pins can be used as
inputs (9/10).  Set them to input to mirror the way other pins are set
up.

* Update waveform gen to only allow 9/10 on 8285

Update the common.h in both generic (remove TODO, it's done!) and the
8285 variant to make isFlashInterfacePin macro correct.  Use that macro
to disable pins 9 and 10 in the common, non-8285 case.
This commit is contained in:
Earle F. Philhower, III
2018-09-17 18:58:06 -07:00
committed by Develo
parent cd43337f4f
commit bc2d4ec18b
7 changed files with 143 additions and 3 deletions
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10
variants/esp8285/initD9D10Pins.cpp Normal file
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@ -0,0 +1,10 @@
#include "Arduino.h"
// The 8285 allows the use of GPIO pins 9 and 10, so set them to inputs
// on startup just like the other pins. This allows their use for interrupts
// as well
void initVariant() {
pinMode(9, INPUT);
pinMode(10, INPUT);
}