Read multiple digital inputs at once

SMish.4 · ‎2022-08-31

I am new to STM MCU and have started working with stm8s105k4. I have a 4 bit digital input and wants to know how can I read that 4 bit at once which is connected to PORTC.

Below logic is very lengthy and not a good way to read inputs. Kindly help.

if ((!GPIO_ReadInputPin(GPIOC, GPIO_PIN_3)) && (GPIO_ReadInputPin(GPIOC, GPIO_PIN_4)) && (GPIO_ReadInputPin(GPIOC, GPIO_PIN_5)) && (!GPIO_ReadInputPin(GPIOC, GPIO_PIN_6)))

Tesla DeLorean · ‎2022-08-31

uint16_t foo = GPIOC->IDR;

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Javier1 · ‎2022-08-31

You should take a look at this app note.

It explains all the GPIO's registers and their use. (Including GPIOx_IDR)

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