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DaVinci™ Video Processors
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DM6437 GPIO voltage level
I'm now using the gpio in DVSDK.
The problem is :
If I configure the register like this :
gpioRegs -> DIR6 = 0; // all pin as output
gpioRegs -> OUT_DATA6 = 0x00005678; //assign the output value
And I measure the voltage on the pins.
The high level sometimes are standard 3.3v ,but sometimes 1.33v or 2v.
It's really weird.
Could anyone tell me why ?
Is that the VDD3P3V_PWDN problem?
I've configure the sysModuleRegs -> VDD3P3V_PWDN = 0; // all power up !!
But the result is still the same....
Some output pins are multiplexed with other functions besides GPIO. Depending on your pin mux register settings, other peripherals may be controlling the output of those pins. Refer to the datasheet and your PINMUX registers.
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