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cpu/stm32: stm32f4 BRR from BSRR #19670

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May 30, 2023
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cpu/stm32: stm32f4 BRR from BSRR #19670

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4 changes: 3 additions & 1 deletion cpu/stm32/include/gpio_ll_arch.h
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Original file line number Diff line number Diff line change
Expand Up @@ -77,7 +77,9 @@ static inline void gpio_ll_clear(gpio_port_t port, uword_t mask)
#if defined(GPIO_BRR_BR0) && !defined(CPU_FAM_STM32F4)
p->BRR = mask;
#else
p->BSRR = mask << 16;
/* The first half-word sets GPIOs, the second half-world clears GPIOs */
volatile uint16_t *brr = (volatile uint16_t *)&(p->BSRR);
brr[1] = (uint16_t)mask;
#endif
}

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