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Add stub for analogReference (#7809)

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Fixes #6410

We actually provide a function prototype for `analogReference()` in
`Arduino.h`, but no implementation.  Add a dummy one that only supports
DEFAULT (like other Arduino boards).
This commit is contained in:
Earle F. Philhower, III 2021-01-07 21:14:14 -08:00 committed by GitHub
parent 67e1dfc5a4
commit adbd23b6e2
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1 changed files with 12 additions and 0 deletions
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cores/esp8266/core_esp8266_wiring_analog.cpp
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@ -39,4 +39,16 @@ extern int __analogRead(uint8_t pin)
extern int analogRead(uint8_t pin) __attribute__ ((weak, alias("__analogRead"))); extern int analogRead(uint8_t pin) __attribute__ ((weak, alias("__analogRead")));
void __analogReference(uint8_t mode)
{
// Only DEFAULT is supported on the ESP8266
if (mode != DEFAULT) {
DEBUGV("analogReference called with illegal mode");
}
}
extern void analogReference(uint8_t mode) __attribute__ ((weak, alias("__analogReference")));
}; };