Is 'STM32F103C8' 'digitalWrite' and 'digitalRead' possible in FAST mode? about arduino_stm32 HOT 10 OPEN

Is it possible to operate ‘Fast mode’ through ‘CORE1’?

Hi
You can easily write such "fast mode" itself, using the direct port manipulation:

int pin = PA5;
// generate a port and mask for defined pin
uint32_t* pin_set_register = portSetRegister(pin);
uint32_t pin_set_mask = digitalPinToBitMask(pin);

// set pin HIGH  ( as digitalWrite() HIGH)
*pin_set_register = pin_set_mask;

// set pin LOW (digitalWrite() LOW)
*pin_set_register = pin_set_mask << 16;

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@board707

Thank you.
I understand how to do it.

Is there a method using 'digitalRead'?

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I think that the syntax seems to be the similar, but I never need a "fast" digitalRead() in my projects.

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use:

uint16_t value = *portInputRegister(pin) & digitalPinToBitMask(pin);

if value == 0 then pin is "low", otherwise pin is "high".

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@stevstrong
Thank you for answer.
However, I'm saying this because I don't know much, but 'an error occurs during compilation'.

code :
int pin7 = PA5;
uint16_t value1 = *portInputRegister(pin7)& digitalPinToBitMask(pin7);

error :
\generic_stm32f103c/variant.h:7:44: error: base operand of '->' is not a pointer
#define portInputRegister(port) ( &(port->regs->IDR) )

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then try:

uint16_t value1 = portInputRegister(pin7) & digitalPinToBitMask(pin7);

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code :
uint16_t value1 = *portInputRegister(digitalPinToPort(pin7)) & digitalPinToBitMask(pin7);

Thank you.

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@stevstrong

It doesn't work.

code:
const int SIG[] = {PA5, PA4, PA0, PA15};
//------------------------------------------------ --------------------//
value1 = *portInputRegister(digitalPinToPort(SIG[0])) & digitalPinToBitMask(SIG[0]);
value2 = *portInputRegister(digitalPinToPort(SIG[1])) & digitalPinToBitMask(SIG[1]);
value3 = *portInputRegister(digitalPinToPort(SIG[2])) & digitalPinToBitMask(SIG[2]);
uint16_t hall_y = 0; uint16_t hall_b = 0; uint16_t hall_g = 0;
if(value1==0){ hall_y = 0; }else{ hall_y = 1; }
if(value2==0){ hall_b = 0; }else{ hall_b = 1; }
if(value3==0){ hall_g = 0; }else{ hall_g = 1; }
//------------------------------------------------ --------------------//

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What exactly do you mean "it doesn't work"? Which part does not work?

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It doesn't work.

@SeongJongKwak
The port access syntax is correct, the error somewhere else in your code.

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