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cpu/stm32: adapt gpio driver to default CMSIS exti structure

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This commit is contained in:
Alexandre Abadie 2020-05-26 14:52:32 +02:00
parent 3ef40f3321
commit 97942ddbe6
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GPG Key ID: 1C919A403CAE1405
1 changed files with 22 additions and 10 deletions
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32
cpu/stm32/periph/gpio_all.c
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@ -43,6 +43,18 @@
static gpio_isr_ctx_t isr_ctx[EXTI_NUMOF];
#endif /* MODULE_PERIPH_GPIO_IRQ */
#if defined(CPU_FAM_STM32L4) || defined(CPU_FAM_STM32WB)
#define EXTI_REG_RTSR (EXTI->RTSR1)
#define EXTI_REG_FTSR (EXTI->FTSR1)
#define EXTI_REG_PR (EXTI->PR1)
#define EXTI_REG_IMR (EXTI->IMR1)
#else
#define EXTI_REG_RTSR (EXTI->RTSR)
#define EXTI_REG_FTSR (EXTI->FTSR)
#define EXTI_REG_PR (EXTI->PR)
#define EXTI_REG_IMR (EXTI->IMR)
#endif
/**
* @brief Extract the port base address from the given pin identifier
*/
@ -140,12 +152,12 @@ void gpio_init_analog(gpio_t pin)
void gpio_irq_enable(gpio_t pin)
{
EXTI->IMR |= (1 << _pin_num(pin));
EXTI_REG_IMR |= (1 << _pin_num(pin));
}
void gpio_irq_disable(gpio_t pin)
{
EXTI->IMR &= ~(1 << _pin_num(pin));
EXTI_REG_IMR &= ~(1 << _pin_num(pin));
}
int gpio_read(gpio_t pin)
@ -227,28 +239,28 @@ int gpio_init_int(gpio_t pin, gpio_mode_t mode, gpio_flank_t flank,
}
#endif
/* configure the active flank */
EXTI->RTSR &= ~(1 << pin_num);
EXTI->RTSR |= ((flank & 0x1) << pin_num);
EXTI->FTSR &= ~(1 << pin_num);
EXTI->FTSR |= ((flank >> 1) << pin_num);
EXTI_REG_RTSR &= ~(1 << pin_num);
EXTI_REG_RTSR |= ((flank & 0x1) << pin_num);
EXTI_REG_FTSR &= ~(1 << pin_num);
EXTI_REG_FTSR |= ((flank >> 1) << pin_num);
/* enable specific pin as exti sources */
SYSCFG->EXTICR[pin_num >> 2] &= ~(0xf << ((pin_num & 0x03) * 4));
SYSCFG->EXTICR[pin_num >> 2] |= (port_num << ((pin_num & 0x03) * 4));
/* clear any pending requests */
EXTI->PR = (1 << pin_num);
EXTI_REG_PR = (1 << pin_num);
/* unmask the pins interrupt channel */
EXTI->IMR |= (1 << pin_num);
EXTI_REG_IMR |= (1 << pin_num);
return 0;
}
void isr_exti(void)
{
/* only generate interrupts against lines which have their IMR set */
uint32_t pending_isr = (EXTI->PR & EXTI->IMR);
uint32_t pending_isr = (EXTI_REG_PR & EXTI_REG_IMR);
for (size_t i = 0; i < EXTI_NUMOF; i++) {
if (pending_isr & (1 << i)) {
EXTI->PR = (1 << i); /* clear by writing a 1 */
EXTI_REG_PR = (1 << i); /* clear by writing a 1 */
isr_ctx[i].cb(isr_ctx[i].arg);
}
}