void EXTIRelease(IO_t io)
{
// don't forget to match cleanup with config
EXTIEnable(io, false);
int chIdx;
chIdx = IO_GPIOPinIdx(io);
if(chIdx < 0)
return;
extiChannelRec_t *rec = &extiChannelRecs[chIdx];
rec->handler = NULL;
}
void EXTIConfig(IO_t io, extiCallbackRec_t *cb, int irqPriority, EXTITrigger_TypeDef trigger)
{
int chIdx;
chIdx = IO_GPIOPinIdx(io);
if(chIdx < 0)
return;
extiChannelRec_t *rec = &extiChannelRecs[chIdx];
int group = extiGroups[chIdx];
rec->handler = cb;
#if defined(STM32F10X)
GPIO_EXTILineConfig(IO_GPIO_PortSource(io), IO_GPIO_PinSource(io));
#elif defined(STM32F303xC)
SYSCFG_EXTILineConfig(IO_EXTI_PortSourceGPIO(io), IO_EXTI_PinSource(io));
#elif defined(STM32F4)
SYSCFG_EXTILineConfig(IO_EXTI_PortSourceGPIO(io), IO_EXTI_PinSource(io));
#else
# warning "Unknown CPU"
#endif
uint32_t extiLine = IO_EXTI_Line(io);
EXTI_ClearITPendingBit(extiLine);
EXTI_InitTypeDef EXTIInit;
EXTIInit.EXTI_Line = extiLine;
EXTIInit.EXTI_Mode = EXTI_Mode_Interrupt;
EXTIInit.EXTI_Trigger = trigger;
EXTIInit.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTIInit);
if(extiGroupPriority[group] > irqPriority) {
extiGroupPriority[group] = irqPriority;
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = extiGroupIRQn[group];
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(irqPriority);
NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(irqPriority);
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
}
