I am currently learning CMSIS-RTOS v2 and I have an issue that is bugging me and I can't find the answer I need.
I am using the STM32L476-Disco board and the joystick center button as an interrupt. I have a very simple Interrupt callback for my center joystick interrupt :
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){
//osEventFlagsSet(evt_id,0x0001);
HAL_GPIO_TogglePin(LD5_GPIO_Port,LD5_Pin);
osThreadFlagsSet(ThId_Led_Blink,0x0001);
}
When I call osThreadFlagsSet, the microcontroller freezes and nothing else happen. This is why I've put the HAL_GPIO_TogglePin : to see if the mcu was still responding or not.
I know that my interrupt resets correctly because when I only put my pin toggle, I can toggle the Led correctly.
ThId_Led_Blink is a ThreadId
osThreadId ThId_Led_Blink;
I've checked that the ID is set correctly in my debugger and it is (it's not null).
As you can see, I've tried with osEvenFlagsSet and I have the same result.
When I check the CMSIS_RTOS v2 documentation, it does specify that osThreadFlagsSet can be called from an ISR, but I am not sure if I need to do something else in that case for the Flags to be set correctly and resolve the issue when the ISR is hanging.
Thanks for your help
So after frustrating hours of searching, I finally fixed my issue.
As described in this website : https://www.freertos.org/RTOS-Cortex-M3-M4.html, for STM32 microprocessor, you need to set the NVIC Group Priority to 4. If you look on freeRTOS, they are talking about putting this line in your code :
NVIC_PriorityGroupConfig( NVIC_PriorityGroup_4 );
However, the STM32 has it's own library for the NVIC and the correct function to set the priority group is :
HAL_NVIC_SetPriorityGrouping(4);
Why go with the same name when you can change everything?
So make sure to call this function before your kernel initialization if you are using nested interrupts with FreeRTOS/CMSIS RTOS.
Also, make sure that your nested interrupt priority is in the range of configured interrupt priority for your FreeRTOS, otherwise, the osThreadFlagsSet function will fail automatically.
I created a new STM32CubeIDE project for the STM32F030CC mcu. I added a GPIO output port on PA8 to enable/disable an LED. Now I tried to delay the toggle by calling HAL_Delay. But my problem is, that the interrupt SysTick_Handler does not get called.
I am a bit stuck since I found no working solution. Do I need to set up the systick interrupt myself? Or has someone a sample project which works with the STM32F030CC?
i used STM32Cube for stm32f103, and set like your config and it worked correctly
there isn't need to set up the systick interrupt yourself
did you debug your code?
if this lines occur
HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000U);
HAL_NVIC_SetPriority(SysTick_IRQn, TickPriority ,0U);
your systick should start with 1ms clock
these code are in HAL_InitTick(TICK_INT_PRIORITY); and it call by HAL_Init();
i am working on a project in msp430f2274 microcontroller. In my project i am trying to read an reed switch which is being connected to a GPIO pin at P2.3. Normally the pin will remain HIGH as it is being connected to pull up from the hardware. when once the switch is pressed/activated a LOW will come and it will trigger the Hardware. till here it is working fine. but now i want to read the other interrupt also, when it goes back to high. I have tried the interrupt type from low - high to high -low in ISR but still no efffect. please help.
i have added ISR from the code
static char x=0;
#pragma vector=PORT1_VECTOR
__interrupt void PORT1_ISR(void)
{
P1IES^=BIT2;
P1OUT^=(BIT0); // enrer the rest code for detection of door open or close.
P1IFG &= ~BIT2;
//P1IES&=~BIT2;
__bis_SR_register_on_exit(GIE+LPM0_bits); // Enter LPM3 on ISR exit
}
Just an idea, sry if this doesn't help.
You could use a timer that starts with the button click and triggers an interrupt when the button is released.
I have a problem with both the sleepmodes and NVIC_reset(), aka software reset.
The problem is present on two totally distinct boards, both with a LPC1769 uC.
If I enter the sleepmode within main() or another function, except an interrupt routine, the sleep mode is working perfecly. The uC wakes also with an external interrupt on EINT0. The reset function does its job also well in the main function.
But when a sleepmode or reset request is invoked inside an interrupt routine trouble starts. The sleep mode lookes to be entered but the uC does not wake up anymore.
E.g. enter a sleep mode with EINT1 and wake with EINT0:
void EINT0_IRQHandler(void)
{
EXTI_ClearEXTIFlag(0);
}
void EINT1_IRQHandler(void)
{
EXTI_ClearEXTIFlag(1);
CLKPWR_Sleep();
}
Anybody a clue why this does not work properly?
Have you checked your interrupt priorities?
34.3.5.2.1 Wakeup from WFI or sleep-on-exit
Normally, the processor wakes up only when it detects an exception with sufficient priority
to cause exception entry.
I'm using some Carbon code in my Cocoa project for handling global key events (shortcuts) from other applications. Currently I have setup a kEventHotKeyReleased event handler and I can successfully obtain hot keys when my application is not active. That triggers some operation in my application.
The problem I have with the behavior of kEventHotKeyReleased is:
Say for example I press the Cmd-Shift-P key combination. As soon as I release the "P" key the hot key event is triggered. I need to be able to trigger the event (or manually trigger it) when all of the keys are unpressed (i.e: the Cmd and Shift keys are released too).
It is easy to monitor for hot keys but I have seen nothing for monitoring individual keystrokes. If I could monitor the modifier key states I would be in business.
Any hints on how to do this?
Thanks in advance!
UPDATE:
I've tried using kEventRawKeyUp and kEventRawKeyModifiersChanged but while kEventHotKeyReleased works those two don't even though I set them up in the exact same way as kEventHotKeyReleased.
EventTypeSpec eventTypes[] = {{kEventClassKeyboard, kEventHotKeyReleased}, {kEventClassKeyboard, kEventRawKeyUp}};
// Changing the order in the list does not help, nor does removing kEventHotKeyReleased
OSStatus err = InstallApplicationEventHandler(&globalHotkeyHandler, GetEventTypeCount(eventTypes), eventTypes, NULL, NULL);
// err == noErr after this line
The globalHotKeyHandler method is called for kEventHotKeyReleased, but not for kEventRawKeyUp for some reason I can't seem to grasp. Here's what my globalHotKeyHandler method looks like:
OSStatus globalHotkeyHandler(EventHandlerCallRef nextHandler, EventRef anEvent, void *userData) {
NSLog(#"Something happened!");
}
Is there an additional call that needs to be made or something else I forgot?
N.B: At first glance, it seems like it could be that Access for Assistive Devices is disabled but it is not. So I'm pretty clueless.
UPDATE 2:
I investigated a bit on the CGEventTap Leibowitzn suggested and I came up with this setup:
CFMachPortRef keyUpEventTap = CGEventTapCreate(kCGHIDEventTap,kCGHeadInsertEventTap,kCGEventTapOptionListenOnly,kCGEventKeyUp,&keyUpCallback,NULL);
CFRunLoopSourceRef keyUpRunLoopSourceRef = CFMachPortCreateRunLoopSource(NULL, keyUpEventTap, 0);
CFRelease(keyUpEventTap);
CFRunLoopAddSource(CFRunLoopGetCurrent(), keyUpRunLoopSourceRef, kCFRunLoopDefaultMode);
CFRelease(keyUpRunLoopSourceRef);
... and the callback:
CGEventRef keyUpCallback (CGEventTapProxy proxy, CGEventType type, CGEventRef event, void *refcon) {
NSLog(#"KeyUp event tapped!");
return event;
}
As you can see I'm using kCGEventKeyUp as the mask for the event tap but somehow I'm receiving mouse down events ??!??
UPDATE 3:
Ok forget that, I overlooked the line in the doc that said to use CGEventMaskBit(kCGEventKeyUp) for this parameter, so the correct call is:
CGEventTapCreate(kCGHIDEventTap,kCGHeadInsertEventTap,kCGEventTapOptionListenOnly,CGEventMaskBit(kCGEventKeyUp),&keyUpCallback,NULL);
I'm still having a problem though: modifier keys do not trigger the kCGEventKeyUp...
UPDATE 4:
Ok forget that again... I'm bound to answer to my own questions 5 minutes after asking them today huh!
To intercept modifier keys, use kCGEventFlagsChanged:
CGEventTapCreate(kCGHIDEventTap,kCGHeadInsertEventTap,kCGEventTapOptionListenOnly,CGEventMaskBit(kCGEventFlagsChanged),&callbackFunction,NULL);
So in essence I got the key and modifier key state detection working, but I'm still interested in knowing why kEventRawKeyUp doesn't work...
N.B: Also note that I'm developing on Tiger with the goal of having support for new and older versions of the OS as much as possible. CGEventTap is 10.4+ only so I'll be using this for now but a backwards-compatible solution would be welcome.
One option is to use EventTaps. This lets you monitor all keyboard events. See:
http://developer.apple.com/mac/library/documentation/Carbon/Reference/QuartzEventServicesRef/Reference/reference.html#//apple_ref/c/func/CGEventTapCreate
Unfortunately event taps will stop working if an application is requesting secure input. For example Quicken.
OSStatus err = InstallApplicationEventHandler(&globalHotkeyHandler, GetEventTypeCount(eventTypes), eventTypes, NULL, NULL);
This is not global. This installs the handler only when your own application is active, and (I believe) after the Carbon Event Manager's own event filters.
You need to use InstallEventHandler, which takes an event target as its first parameter (InstallApplicationEventHandler is a macro that passes the application event target).
For events that occur while your application is not active, the target you want is GetEventMonitorTarget(). For events that occur while your application is active, the target you want is GetEventDispatcherTarget(). To catch events no matter what application is active, install your handler on both targets.
Nowadays, though, I'd just use CGEventTaps, as Leibowitzn suggested.