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ATmegaxxxx - remove single line comments
This commit is contained in:
Phillip Stevens
parent
3ece178dd0
commit
5e32393035
3 changed files with 32 additions and 28 deletions
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@ -600,10 +600,10 @@ void vPortEndScheduler( void )
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disable the tick interrupt here. */
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#if defined (portUSE_WDTO)
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wdt_disable(); // disable Watchdog Timer
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wdt_disable(); /* disable Watchdog Timer */
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#elif defined( portUSE_TIMER0 )
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portTIMSK &= ~( _BV(OCIE0B)|_BV(OCIE0A)|_BV(TOIE0) ); // disable all Timer0 interrupts
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portTIMSK &= ~( _BV(OCIE0B)|_BV(OCIE0A)|_BV(TOIE0) ); /* disable all Timer0 interrupts */
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#endif
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}
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@ -650,7 +650,7 @@ void vPortYieldFromTick( void )
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*/
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void prvSetupTimerInterrupt( void )
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{
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//reset watchdog
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/* reset watchdog */
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wdt_reset();
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/* actual port tick rate in Hz, calculated */
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@ -658,7 +658,7 @@ void prvSetupTimerInterrupt( void )
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/* initialise first second of ticks */
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ticksRemainingInSec = portTickRateHz;
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//set up WDT Interrupt (rather than the WDT Reset).
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/* set up WDT Interrupt (rather than the WDT Reset). */
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wdt_interrupt_enable( portUSE_WDTO );
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}
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@ -719,7 +719,7 @@ uint8_t ucLowByte;
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*
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*/
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ISR(portSCHEDULER_ISR, ISR_NAKED) __attribute__ ((hot, flatten));
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// ISR(portSCHEDULER_ISR, ISR_NAKED ISR_NOBLOCK) __attribute__ ((hot, flatten));
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/* ISR(portSCHEDULER_ISR, ISR_NAKED ISR_NOBLOCK) __attribute__ ((hot, flatten)); */
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ISR(portSCHEDULER_ISR)
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{
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@ -736,7 +736,7 @@ uint8_t ucLowByte;
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* use ISR_NOBLOCK where there is an important timer running, that should preempt the scheduler.
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*/
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ISR(portSCHEDULER_ISR) __attribute__ ((hot, flatten));
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// ISR(portSCHEDULER_ISR, ISR_NOBLOCK) __attribute__ ((hot, flatten));
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/* ISR(portSCHEDULER_ISR, ISR_NOBLOCK) __attribute__ ((hot, flatten)); */
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ISR(portSCHEDULER_ISR)
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{
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@ -86,12 +86,13 @@ typedef uint8_t UBaseType_t;
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/* Architecture specifics. */
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// System Tick - Scheduler timer
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// Prefer to use the enhanced Watchdog Timer, but also Timer0 is ok.
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/* System Tick - Scheduler timer
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* Prefer to use the enhanced Watchdog Timer, but also Timer0 is ok.
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*/
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#if defined(WDIE) && defined(WDIF) // Enhanced WDT with interrupt capability
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#if defined(WDIE) && defined(WDIF) /* If Enhanced WDT with interrupt capability is available */
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#define portUSE_WDTO WDTO_15MS // portUSE_WDTO to use the Watchdog Timer for xTaskIncrementTick
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#define portUSE_WDTO WDTO_15MS /* use the Watchdog Timer for xTaskIncrementTick */
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/* Watchdog period options: WDTO_15MS
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WDTO_30MS
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@ -105,7 +106,7 @@ typedef uint8_t UBaseType_t;
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#else
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#define portUSE_TIMER0 // portUSE_TIMER0 to use 8 bit Timer0 for xTaskIncrementTick
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#define portUSE_TIMER0 /* use the 8-bit Timer0 for xTaskIncrementTick */
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#endif
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@ -117,7 +118,7 @@ typedef uint8_t UBaseType_t;
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* from data sheet.
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*/
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#if defined( portUSE_WDTO )
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#define portTICK_PERIOD_MS ( (TickType_t) _BV( portUSE_WDTO + 4 ) ) // Inaccurately assuming 128 kHz Watchdog Timer.
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#define portTICK_PERIOD_MS ( (TickType_t) _BV( portUSE_WDTO + 4 ) )
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#else
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#define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
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#endif
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@ -133,7 +134,10 @@ extern void vPortYield( void ) __attribute__ ( ( naked ) );
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#if defined(__AVR_ATmega2560__) || defined(__AVR_ATmega2561__)
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/* Task function macros as described on the FreeRTOS.org WEB site. */
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// Add .lowtext tag from the linker script avr6.x for ATmega2560 and ATmega2561. To make sure they are loaded in low memory.
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/* Add .lowtext tag from the avr linker script avr6.x for ATmega2560 and ATmega2561
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* to make sure functions are loaded in low memory.
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*/
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#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters ) __attribute__ ((section (".lowtext")))
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#else
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#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
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@ -8,7 +8,7 @@ This port provides a basis for supporting all modern ATmega devices using either
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This initial commit contains the information required to build with System Tick being generated by either the:
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- Watchdog Timer, or
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- Timer 0 - an 8-bit Timer
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- Timer0 - an 8-bit Timer
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Further commits can add support for 16-bit Timers available on many relevant devices. The availability of these 16-bit Timers is somewhat device specific, and these complex and highly configurable Timers are often used to generate phase correct PWM timing (for example) and they would be wasted as a simple System Tick.
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@ -59,18 +59,11 @@ To avoid this issue causing `pvPort_Malloc()` to failing, the user needs to issu
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if( __malloc_heap_end == 0 )
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__malloc_heap_end = (char *)(RAMEND - __malloc_margin);
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```
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Unfortunately in the repository there is nowhere sensible to include this statement.
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Unfortunately in the repository there is nowhere sensible to include this statement as it should be included early in the `main()` function.
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<h3>Supported Devices</h3>
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ATmega devices without enhanced __WDT__ Interrupt capability - use Timer0.
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- ATmega8A/16A/32A/64A/128A -> 4kB RAM
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- ATmega808/809/1608/1609/3208/3209/4808/4809 -> 6kB RAM
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- ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P -> 4kB RAM
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- ATmega169A/169PA/329A/329PA/3290A/3290PA/649A/649P/6490A/6490P -> 4kB RAM
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ATmega devices with __ENHANCED WDT__ Interrupt capability - use WDT.
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ATmega devices with __ENHANCED WDT__ Interrupt capability - will use WDT.
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- ATmega8U2/16U2/32U2 -> 2kB RAM
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- ATmega16U4/32U4 - Arduino Leonardo -> 2.5kB RAM
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@ -78,3 +71,10 @@ ATmega devices with __ENHANCED WDT__ Interrupt capability - use WDT.
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- ATmega164PA/324PA/644PA/1284P - Goldilocks -> __16kB RAM__
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- ATmega324PB -> 2kB RAM
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- ATmega640/1280/2560/1281/2561 - Arduino Mega -> __8kB RAM + XRAM__
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ATmega devices without enhanced __WDT__ Interrupt capability - will use Timer0.
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- ATmega8A/16A/32A/64A/128A -> 4kB RAM
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- ATmega808/809/1608/1609/3208/3209/4808/4809 -> 6kB RAM
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- ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P -> 4kB RAM
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- ATmega169A/169PA/329A/329PA/3290A/3290PA/649A/649P/6490A/6490P -> 4kB RAM
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