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Infallible Code (lemmy.ml)

submitted 1 week ago by sirico@feddit.uk to c/programmerhumor@lemmy.ml

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[-] Croquette@sh.itjust.works 6 points 1 week ago

I am working with C in embedded designs and I still use 1 or 0 for a bool certain situations, mostly lines level.

For whatever pea-brained reason, it feels yucky to me to set a gpio to true/false instead of a 1/0.

[-] xthexder@l.sw0.com 6 points 1 week ago* (last edited 1 week ago)

GPIOs are usually controlled by a single bit of a register anyway. Most likely you need to do something like:

// Set high
PORTB |= 1 << PINB5;
// Set low
PORTB &= ~(1 << PINB5);

[-] Croquette@sh.itjust.works 2 points 1 week ago

I am a lazy dev (not really, clients always want fast code), so I use the provided HAL libraries 99.9% of the time.

But I have seen code where someone would write something like

gpio_write(PIN_X, true)

and it always stood out to me.

[-] JackbyDev@programming.dev 1 points 1 week ago

Define on as true or something? Or maybe that's more confusing. I'm not a C dev so I'm not gonna pretend to understand idiomatic microcontroller code lol.

[-] Croquette@sh.itjust.works 1 points 1 week ago

Sometimes, people do that. But using 0/1 is explicit enough since you can refer to a line as '1' or '0' for high/low on the hardware as well

this post was submitted on 15 Jul 2025

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