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Fix ackbtn clearing the edge detector.

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This commit is contained in:
NIIBE Yutaka
2018-10-01 12:56:41 +09:00
parent 02aa678d4c
commit 0ed2e95ea2
4 changed files with 54 additions and 14 deletions
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36
contrib/ackbtn-stm32f103.c
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@@ -35,6 +35,8 @@
#include "sys.h"
static uint32_t pin_config;
#define PINCFG_EDGE 0x80000000
#define PINCFG_EDGE_RISING PINCFG_EDGE
void
ackbtn_init (chopstx_intr_t *intr)
@@ -42,7 +44,6 @@ ackbtn_init (chopstx_intr_t *intr)
uint8_t irq_num;
uint32_t afio_exticr_index;
uint32_t afio_exticr_extiX_pY;
int rising_edge;
switch (SYS_BOARD_ID)
{
@@ -53,36 +54,43 @@ ackbtn_init (chopstx_intr_t *intr)
afio_exticr_extiX_pY = AFIO_EXTICR1_EXTI3_PA;
irq_num = EXTI3_IRQ;
pin_config = 0x0008; /* EXTI_PR_PR3 == EXTI_IMR_MR3 == EXTI_RTSR_TR3 */
rising_edge = 1;
pin_config |= PINCFG_EDGE_RISING;
break;
}
chopstx_claim_irq (intr, irq_num);
/* Configure EXTI line */
if (afio_exticr_extiX_pY)
AFIO->EXTICR[afio_exticr_index] |= afio_exticr_extiX_pY;
/* Interrupt is masked, now */
EXTI->IMR &= ~pin_config;
EXTI->IMR &= ~(pin_config & ~PINCFG_EDGE);
/* Configure which edge is detected */
if (rising_edge)
EXTI->RTSR |= pin_config;
else
EXTI->FTSR |= pin_config;
chopstx_claim_irq (intr, irq_num);
}
void
ackbtn_enable (void)
{
EXTI->PR |= pin_config; /* Clear pending interrupt */
EXTI->IMR |= pin_config; /* Enable interrupt clearing the mask */
/* Clear pending interrupt */
EXTI->PR |= (pin_config & ~PINCFG_EDGE);
/* Enable interrupt, clearing the mask */
EXTI->IMR |= (pin_config & ~PINCFG_EDGE);
/* Configure which edge is detected */
if ((pin_config & PINCFG_EDGE))
EXTI->RTSR |= (pin_config & ~PINCFG_EDGE);
else
EXTI->FTSR |= (pin_config & ~PINCFG_EDGE);
}
void
ackbtn_disable (void)
{
EXTI->IMR &= ~pin_config; /* Disable interrupt having the mask */
EXTI->PR |= pin_config; /* Clear pending interrupt */
/* Disable interrupt having the mask */
EXTI->IMR &= ~(pin_config & ~PINCFG_EDGE);
/* Clear pending interrupt */
/* Disable edge detection */
EXTI->RTSR &= ~(pin_config & ~PINCFG_EDGE);
EXTI->FTSR &= ~(pin_config & ~PINCFG_EDGE);
}