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6 years, 10 months ago.
KL25Z Inverted GPIO (HIGH is LOW, LOW is HIGH, DigitalIn is DigitalOut , DigitalOut is DigitalIn)
Hello!
As the title says , I'm trying to program a KL25Z in mbed . More specifically , I'm trying to read a HC-SR04 Ultrasonic Sensor .
Echo (5V) is passed through a voltage divider so I can send 3.3V to KL .
The problem I'm having is that I can only send HIGH on a DigitalOut by writing a LOW ... and vice versa . The trigger pin defined as a DigitalOut is not outputting anything, while the echo pin defined as a DigitalIn is outputting 3.3V .
Did anybody else encounter this problem ? Am I doing something wrong ?
Thanks for reading my question !
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