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Add MAXIMUM_STEPPER_RATE, enforce in multi-stepping

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The timing value should be properly set for ALL boards. The compiler will check and set maximum step rate calculations based on those values.
This commit is contained in:
etagle
2018-06-03 14:24:23 -03:00
committed by Scott Lahteine
parent 39a7e7720d
commit 6f14bcaa3e
120 changed files with 699 additions and 224 deletions
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21
Marlin/src/inc/Conditionals_post.h
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@ -1444,6 +1444,15 @@
#define USE_EXECUTE_COMMANDS_IMMEDIATE
#endif
// Calculate a default maximum stepper rate, if not supplied
#ifndef MAXIMUM_STEPPER_RATE
#if MINIMUM_STEPPER_PULSE
#define MAXIMUM_STEPPER_RATE (1000000UL / (2UL * (MINIMUM_STEPPER_PULSE)))
#else
#define MAXIMUM_STEPPER_RATE 500000UL
#endif
#endif
//
// Estimate the amount of time the ISR will take to execute
//
@ -1533,8 +1542,16 @@
// And the total minimum loop time is, without including the base
#define MIN_ISR_LOOP_CYCLES (ISR_X_STEPPER_CYCLES + ISR_Y_STEPPER_CYCLES + ISR_Z_STEPPER_CYCLES + ISR_E_STEPPER_CYCLES + ISR_MIXING_STEPPER_CYCLES)
// Calculate the minimum MPU cycles needed per pulse to enforce not surpassing the maximum stepper rate
#define _MIN_STEPPER_PULSE_CYCLES(N) MAX((F_CPU) / (MAXIMUM_STEPPER_RATE), ((F_CPU) / 500000UL) * (N))
#if MINIMUM_STEPPER_PULSE
#define MIN_STEPPER_PULSE_CYCLES _MIN_STEPPER_PULSE_CYCLES(MINIMUM_STEPPER_PULSE)
#else
#define MIN_STEPPER_PULSE_CYCLES _MIN_STEPPER_PULSE_CYCLES(1)
#endif
// But the user could be enforcing a minimum time, so the loop time is
#define ISR_LOOP_CYCLES (ISR_LOOP_BASE_CYCLES + ((MINIMUM_STEPPER_PULSE*2UL) > MIN_ISR_LOOP_CYCLES ? (MINIMUM_STEPPER_PULSE*2UL) : MIN_ISR_LOOP_CYCLES))
#define ISR_LOOP_CYCLES (ISR_LOOP_BASE_CYCLES + MAX(MIN_STEPPER_PULSE_CYCLES, MIN_ISR_LOOP_CYCLES))
// If linear advance is enabled, then it is handled separately
#if ENABLED(LIN_ADVANCE)
@ -1547,7 +1564,7 @@
#endif
// And the real loop time
#define ISR_LA_LOOP_CYCLES ((MINIMUM_STEPPER_PULSE*2UL) > MIN_ISR_LA_LOOP_CYCLES ? (MINIMUM_STEPPER_PULSE*2UL) : MIN_ISR_LA_LOOP_CYCLES)
#define ISR_LA_LOOP_CYCLES MAX(MIN_STEPPER_PULSE_CYCLES, MIN_ISR_LA_LOOP_CYCLES)
#else
#define ISR_LA_LOOP_CYCLES 0UL