Improve STM32 timer conflict messages (#20544)
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Jason Smith
GitHub
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82540be931
commit
094e822070
@ -27,7 +27,6 @@
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// Local defines
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// ------------------------
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// Default timer priorities. Override by specifying alternate priorities in the board pins file.
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// The TONE timer is not present here, as it currently cannot be set programmatically. It is set
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// by defining TIM_IRQ_PRIO in the variant.h or platformio.ini file, which adjusts the default
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@ -96,11 +95,6 @@
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#define STEP_TIMER_DEV _TIMER_DEV(STEP_TIMER)
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#define TEMP_TIMER_DEV _TIMER_DEV(TEMP_TIMER)
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#define __TIMER_IRQ_NAME(X) TIM##X##_IRQn
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#define _TIMER_IRQ_NAME(X) __TIMER_IRQ_NAME(X)
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#define STEP_TIMER_IRQ_NAME _TIMER_IRQ_NAME(STEP_TIMER)
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#define TEMP_TIMER_IRQ_NAME _TIMER_IRQ_NAME(TEMP_TIMER)
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// ------------------------
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// Private Variables
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// ------------------------
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@ -197,87 +191,132 @@ void SetTimerInterruptPriorities() {
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TERN_(HAS_SERVOS, libServo::setInterruptPriority(SERVO_TIMER_IRQ_PRIO, 0));
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}
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// This is a terrible hack to replicate the behavior used in the framework's SoftwareSerial.cpp
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// to choose a serial timer. It will select TIM7 on most boards used by Marlin, but this is more
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// resiliant to new MCUs which may not have a TIM7. Best practice is to explicitly specify
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// TIMER_SERIAL to avoid relying on framework selections which may not be predictable.
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#if !defined(TIMER_SERIAL)
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#if defined (TIM18_BASE)
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#define TIMER_SERIAL TIM18
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#elif defined (TIM7_BASE)
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#define TIMER_SERIAL TIM7
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#elif defined (TIM6_BASE)
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#define TIMER_SERIAL TIM6
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#elif defined (TIM22_BASE)
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#define TIMER_SERIAL TIM22
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#elif defined (TIM21_BASE)
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#define TIMER_SERIAL TIM21
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#elif defined (TIM17_BASE)
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#define TIMER_SERIAL TIM17
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#elif defined (TIM16_BASE)
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#define TIMER_SERIAL TIM16
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#elif defined (TIM15_BASE)
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#define TIMER_SERIAL TIM15
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#elif defined (TIM14_BASE)
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#define TIMER_SERIAL TIM14
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#elif defined (TIM13_BASE)
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#define TIMER_SERIAL TIM13
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#elif defined (TIM11_BASE)
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#define TIMER_SERIAL TIM11
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#elif defined (TIM10_BASE)
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#define TIMER_SERIAL TIM10
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#elif defined (TIM12_BASE)
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#define TIMER_SERIAL TIM12
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#elif defined (TIM19_BASE)
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#define TIMER_SERIAL TIM19
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#elif defined (TIM9_BASE)
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#define TIMER_SERIAL TIM9
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#elif defined (TIM5_BASE)
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#define TIMER_SERIAL TIM5
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#elif defined (TIM4_BASE)
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#define TIMER_SERIAL TIM4
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#elif defined (TIM3_BASE)
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#define TIMER_SERIAL TIM3
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#elif defined (TIM2_BASE)
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#define TIMER_SERIAL TIM2
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#elif defined (TIM20_BASE)
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#define TIMER_SERIAL TIM20
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#elif defined (TIM8_BASE)
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#define TIMER_SERIAL TIM8
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#elif defined (TIM1_BASE)
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#define TIMER_SERIAL TIM1
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#else
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#error No suitable timer found for SoftwareSerial, define TIMER_SERIAL in variant.h
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#endif
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#endif
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// ------------------------
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// Detect timer conflicts
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// ------------------------
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// Place all timers used into an array, then recursively check for duplicates during compilation.
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// This does not currently account for timers used for PWM, such as for fans.
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// Timers are actually pointers. Convert to integers to simplify constexpr logic.
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static constexpr uintptr_t timers_in_use[] = {
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uintptr_t(TEMP_TIMER_DEV), // Override in pins file
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uintptr_t(STEP_TIMER_DEV), // Override in pins file
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#if HAS_TMC_SW_SERIAL
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uintptr_t(TIMER_SERIAL), // Set in variant.h, or as a define in platformio.h if not present in variant.h
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// This list serves two purposes. Firstly, it facilitates build-time mapping between
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// variant-defined timer names (such as TIM1) and timer numbers. It also replicates
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// the order of timers used in the framework's SoftwareSerial.cpp. The first timer in
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// this list will be automatically used by SoftwareSerial if it is not already defined
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// in the board's variant or compiler options.
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static constexpr struct {uintptr_t base_address; int timer_number;} stm32_timer_map[] = {
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#ifdef TIM18_BASE
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{ uintptr_t(TIM18), 18 },
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#endif
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#if ENABLED(SPEAKER)
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uintptr_t(TIMER_TONE), // Set in variant.h, or as a define in platformio.h if not present in variant.h
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#ifdef TIM7_BASE
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{ uintptr_t(TIM7), 7 },
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#endif
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#if HAS_SERVOS
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uintptr_t(TIMER_SERVO), // Set in variant.h, or as a define in platformio.h if not present in variant.h
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#ifdef TIM6_BASE
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{ uintptr_t(TIM6), 6 },
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#endif
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#ifdef TIM22_BASE
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{ uintptr_t(TIM22), 22 },
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#endif
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#ifdef TIM21_BASE
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{ uintptr_t(TIM21), 21 },
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#endif
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#ifdef TIM17_BASE
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{ uintptr_t(TIM17), 17 },
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#endif
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#ifdef TIM16_BASE
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{ uintptr_t(TIM16), 16 },
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#endif
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#ifdef TIM15_BASE
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{ uintptr_t(TIM15), 15 },
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#endif
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#ifdef TIM14_BASE
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{ uintptr_t(TIM14), 14 },
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#endif
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#ifdef TIM13_BASE
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{ uintptr_t(TIM13), 13 },
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#endif
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#ifdef TIM11_BASE
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{ uintptr_t(TIM11), 11 },
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#endif
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#ifdef TIM10_BASE
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{ uintptr_t(TIM10), 10 },
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#endif
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#ifdef TIM12_BASE
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{ uintptr_t(TIM12), 12 },
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#endif
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#ifdef TIM19_BASE
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{ uintptr_t(TIM19), 19 },
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#endif
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#ifdef TIM9_BASE
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{ uintptr_t(TIM9), 9 },
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#endif
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#ifdef TIM5_BASE
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{ uintptr_t(TIM5), 5 },
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#endif
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#ifdef TIM4_BASE
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{ uintptr_t(TIM4), 4 },
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#endif
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#ifdef TIM3_BASE
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{ uintptr_t(TIM3), 3 },
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#endif
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#ifdef TIM2_BASE
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{ uintptr_t(TIM2), 2 },
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#endif
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#ifdef TIM20_BASE
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{ uintptr_t(TIM20), 20 },
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#endif
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#ifdef TIM8_BASE
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{ uintptr_t(TIM8), 8 },
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#endif
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#ifdef TIM1_BASE
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{ uintptr_t(TIM1), 1 }
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#endif
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};
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static constexpr bool verify_no_duplicate_timers() {
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// Convert from a timer base address to its integer timer number.
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static constexpr int get_timer_num_from_base_address(uintptr_t base_address) {
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for (const auto &timer : stm32_timer_map)
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if (timer.base_address == base_address) return timer.timer_number;
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return 0;
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}
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// The platform's SoftwareSerial.cpp will use the first timer from stm32_timer_map.
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#if HAS_TMC_SW_SERIAL && !defined(TIMER_SERIAL)
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#define TIMER_SERIAL (stm32_timer_map[0].base_address)
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#endif
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// constexpr doesn't like using the base address pointers that timers evaluate to.
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// We can get away with casting them to uintptr_t, if we do so inside an array.
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// GCC will not currently do it directly to a uintptr_t.
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IF_ENABLED(HAS_TMC_SW_SERIAL, static constexpr uintptr_t timer_serial[] = {uintptr_t(TIMER_SERIAL)});
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IF_ENABLED(SPEAKER, static constexpr uintptr_t timer_tone[] = {uintptr_t(TIMER_TONE)});
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IF_ENABLED(HAS_SERVOS, static constexpr uintptr_t timer_servo[] = {uintptr_t(TIMER_SERVO)});
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enum TimerPurpose { TP_SERIAL, TP_TONE, TP_SERVO, TP_STEP, TP_TEMP };
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// List of timers, to enable checking for conflicts.
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// Includes the purpose of each timer to ease debugging when evaluating at build-time.
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// This cannot yet account for timers used for PWM output, such as for fans.
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static constexpr struct { TimerPurpose p; int t; } timers_in_use[] = {
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#if HAS_TMC_SW_SERIAL
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{TP_SERIAL, get_timer_num_from_base_address(timer_serial[0])}, // Set in variant.h, or as a define in platformio.h if not present in variant.h
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#endif
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#if ENABLED(SPEAKER)
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{TP_TONE, get_timer_num_from_base_address(timer_tone[0])}, // Set in variant.h, or as a define in platformio.h if not present in variant.h
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#endif
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#if HAS_SERVOS
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{TP_SERVO, get_timer_num_from_base_address(timer_servo[0])}, // Set in variant.h, or as a define in platformio.h if not present in variant.h
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#endif
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{TP_STEP, STEP_TIMER},
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{TP_TEMP, TEMP_TIMER},
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};
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static constexpr bool verify_no_timer_conflicts() {
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LOOP_L_N(i, COUNT(timers_in_use))
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LOOP_S_L_N(j, i + 1, COUNT(timers_in_use))
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if (timers_in_use[i] == timers_in_use[j]) return false;
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if (timers_in_use[i].t == timers_in_use[j].t) return false;
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return true;
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}
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// If this assertion fails at compile time, review the timers_in_use array. If default_envs is
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// defined properly in platformio.ini, VS Code can evaluate the array when hovering over it,
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// making it easy to identify the conflicting timers.
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static_assert(verify_no_duplicate_timers(), "One or more timer conflict detected");
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// If this assertion fails at compile time, review the timers_in_use array.
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// If default_envs is defined properly in platformio.ini, VS Code can evaluate the array
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// when hovering over it, making it easy to identify the conflicting timers.
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static_assert(verify_no_timer_conflicts(), "One or more timer conflict detected. Examine \"timers_in_use\" to help identify conflict.");
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#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
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