8000 L4 integration: External interupt/events. by tobbad · Pull Request #1924 · micropython/micropython · GitHub
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L4 integration: External interupt/events. #1924

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L4 integration: External interupt/events. #1924

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46 changes: 43 additions & 3 deletions stmhal/extint.c
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< 8000 /tr>
Original file line number Diff line number Diff line change
Expand Up @@ -90,9 +90,17 @@
// register in an atomic fashion by using bitband addressing.
#define EXTI_MODE_BB(mode, line) (*(__IO uint32_t *)(PERIPH_BB_BASE + ((EXTI_OFFSET + (mode)) * 32) + ((line) * 4)))

#if defined(MCU_SERIES_L4)
// L4 support 40 Events/IRQs lines of the type configurable and direct.
// The L4 port only supports configurable line types which are already supported by
// micropython. Details see page 330 of RM0351, Rev 1.
// The USB_FS_WAKUP event is a direct type and there is no support for it.
#define EXTI_Mode_Interrupt offsetof(EXTI_TypeDef, IMR1)
#define EXTI_Mode_Event offsetof(EXTI_TypeDef, EMR1)
#else
#define EXTI_Mode_Interrupt offsetof(EXTI_TypeDef, IMR)
#define EXTI_Mode_Event offsetof(EXTI_TypeDef, EMR)

#endif
#define EXTI_SWIER_BB(line) (*(__IO uint32_t *)(PERIPH_BB_BASE + ((EXTI_OFFSET + offsetof(EXTI_TypeDef, SWIER)) * 32) + ((line) * 4)))

typedef struct {
Expand All @@ -108,13 +116,26 @@ STATIC uint32_t pyb_extint_mode[EXTI_NUM_VECTORS];
#if !defined(OTG_HS_WKUP_IRQn)
#define OTG_HS_WKUP_IRQn 76 // Some MCUs don't have HS, but we want a value to put in our table
#endif
#if !defined(OTG_FS_WKUP_IRQn)
#define OTG_FS_WKUP_IRQn 42 // Some MCUs don't have FS IRQ, but we want a value to put in our table
#endif

STATIC const uint8_t nvic_irq_channel[EXTI_NUM_VECTORS] = {
EXTI0_IRQn, EXTI1_IRQn, EXTI2_IRQn, EXTI3_IRQn, EXTI4_IRQn,
EXTI9_5_IRQn, EXTI9_5_IRQn, EXTI9_5_IRQn, EXTI9_5_IRQn, EXTI9_5_IRQn,
EXTI15_10_IRQn, EXTI15_10_IRQn, EXTI15_10_IRQn, EXTI15_10_IRQn, EXTI15_10_IRQn,
EXTI15_10_IRQn, PVD_IRQn, RTC_Alarm_IRQn, OTG_FS_WKUP_IRQn, ETH_WKUP_IRQn,
OTG_HS_WKUP_IRQn, TAMP_STAMP_IRQn, RTC_WKUP_IRQn
EXTI15_10_IRQn,
#if defined(MCU_SERIES_L4)
PVD_PVM_IRQn,
#else
PVD_IRQn,
#endif
RTC_Alarm_IRQn,
OTG_FS_WKUP_IRQn,
ETH_WKUP_IRQn,
OTG_HS_WKUP_IRQn,
TAMP_STAMP_IRQn,
RTC_WKUP_IRQn
};

// Set override_callback_obj to true if you want to unconditionally set the
Expand Down Expand Up @@ -230,7 +251,11 @@ void extint_swint(uint line) {
if (line >= EXTI_NUM_VECTORS) {
return;
}
#if defined(MCU_SERIES_L4)
EXTI->SWIER1 = (1 << line);
#else
EXTI->SWIER = (1 << line);
#endif
}

/// \method line()
Expand Down Expand Up @@ -273,12 +298,27 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_1(extint_obj_swint_obj, extint_obj_swint);
/// \classmethod regs()
/// Dump the values of the EXTI registers.
STATIC mp_obj_t extint_regs(void) {
#if defined(MCU_SERIES_L4)
printf("EXTI_IMR1 %08lx\n", EXTI->IMR1);
printf("EXTI_IMR2 %08lx\n", EXTI->IMR2);
printf("EXTI_EMR1 %08lx\n", EXTI->EMR1);
printf("EXTI_EMR2 %08lx\n", EXTI->EMR2);
printf("EXTI_RTSR1 %08lx\n", EXTI->RTSR1);
printf("EXTI_RTSR2 %08lx\n", EXTI->RTSR2);
printf("EXTI_FTSR1 %08lx\n", EXTI->FTSR1);
printf("EXTI_FTSR2 %08lx\n", EXTI->FTSR2);
printf("EXTI_SWIER1 %08lx\n", EXTI->SWIER1);
printf("EXTI_SWIER2 %08lx\n", EXTI->SWIER2);
printf("EXTI_PR1 %08lx\n", EXTI->PR1);
printf("EXTI_PR2 %08lx\n", EXTI->PR2);
#else
printf("EXTI_IMR %08lx\n", EXTI->IMR);
printf("EXTI_EMR %08lx\n", EXTI->EMR);
printf("EXTI_RTSR %08lx\n", EXTI->RTSR);
printf("EXTI_FTSR %08lx\n", EXTI->FTSR);
printf("EXTI_SWIER %08lx\n", EXTI->SWIER);
printf("EXTI_PR %08lx\n", EXTI->PR);
#endif
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(extint_regs_fun_obj, extint_regs);
Expand Down
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