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[mawrob]

Is there a fast gpio in the Apollo3 Arduino implementation and are there any examples?

In the document Apollo3 Porting Guide (https://ambiq.com/wp-content/uploads/20 ... sGuide.pdf) page 23, macros for Fast GPIO are described so it appears that this may be possible.

[mawrob]

I think I have found the answer to my own question. It seems one can include the Ambiq code for Fast GPIO by:

Code: Select all

// Including the Ambiq gpio library
#include <am_hal_gpio.h>

#define _clockPin 37
....
// Initialize fast gpio where the HEX number is the pin map for the fast gpio pins i.e. pin 37 as an output
 am_hal_gpio_fast_pinconfig((uint64_t)0x1000000000, g_AM_HAL_GPIO_OUTPUT, 0);
 am_hal_gpio_fastgpio_enable(_clockPin);

...

//then use
//digitalWrite(_clockPin, HIGH);
 am_hal_gpio_fastgpio_set(_clockPin);

//digitalWrite(_clockPin, LOW);
 am_hal_gpio_fastgpio_clr(_clockPin);