I am trying to tri-state the SAI1-SDA on my stm32439i-eval2 board in order to try and make my ov2640 camera work. To do this, I need to set bit 13 (address 0x300) to 1 on the wm8994 audio chip. I am struggling with this. If anyone could help me either vaguely or specifically that would be great.
Tri-Stating SAI1_SDA for stm32439i-eval2
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Your question is unclear (what's SAI1-SDA?), but if you want to make a pin in an STM32 microcontroller behave like a tri-state pin, here's what you have to do:
GPIO_Init()standard firmware library call) and then reset or set, respectively, the GPIO usingGPIO_ResetBits()andGPIO_SetBits().