Missing requestFrom overloaded function

[jrockinl]

Hardware:

Board: ESP32 and ESP 8266
Core Installation version: all
IDE name: Arduino IDE
Flash Frequency: n/a
PSRAM enabled: n/a
Upload Speed: n/a
Computer OS: n/a

Description:

While trying to fix Arduino Due problem with a touch sensor MPR121, I found a function in the Wire library that handled the condition that failed. The MPR121 library did not handle I2C Restart bits properly and actually created a stop and a start. There are i2C devices that toss away data to be read if the read (preceded by a write of desired address) is not followed by Restart bit.

The fixed MPR121 library (Adafruit_MPR121) works for many boards now but seems if fails on ESP32 and ESP8266 because the Wire library doesn't have the following Arduino function:
uint8_t TwoWire::requestFrom(uint8_t address, uint8_t quantity, uint32_t iaddress, uint8_t isize, uint8_t sendStop)

Sketch:

MPR121test.zip

[stickbreaker]

@jrockinl the official Arduino reference arduino.cc WireRequestFrom does not list that variant? Where is it defined?

It looks to me that adafruit made a variant of the Wire() object.

Chuck.

[jrockinl]

No, it wasn't adafruit that created it.  I found it in the arduino wire.cpp.h in the official Arduino files for at very least, Uno, Mega2560 (1.6.23) and Due (1.6.12). On Thursday, September 19, 2019, 2:01:25 PM CDT, chuck todd <[email protected]> wrote: @jrockinl the official Arduino reference arduino.cc WireRequestFrom does not list that variant? Where is it defined? It looks to me that adafruit made a variant of the Wire() object. Chuck. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or mute the thread.

[stickbreaker]

@jrockinl It's not part of documented arduino/ArduinoCore-API .
Someone snuck it in, they are arguing about officially including it.

Chuck.

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[stale]

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