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docs: Add STM32F407 benchmarks to Features.md document 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Kevin O'Connor 2019-08-31 20:48:02 -04:00
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@ -129,24 +129,25 @@ Step Benchmarks
Below are the results of stepper performance tests. The numbers shown Below are the results of stepper performance tests. The numbers shown
represent total number of steps per second on the micro-controller. represent total number of steps per second on the micro-controller.
| Micro-controller | Fastest step rate | 3 steppers active | | Micro-controller | Fastest step rate | 3 steppers active |
| --------------------------- | ----------------- | ----------------- | | ------------------------------- | ----------------- | ----------------- |
| 16Mhz AVR | 151K | 100K | | 16Mhz AVR | 151K | 100K |
| 20Mhz AVR | 189K | 125K | | 20Mhz AVR | 189K | 125K |
| Arduino Zero (SAMD21) | 234K | 217K | | Arduino Zero (SAMD21) | 234K | 217K |
| "Blue Pill" (STM32F103) | 395K | 356K | | "Blue Pill" (STM32F103) | 395K | 356K |
| Arduino Due (SAM3X8E) | 438K | 438K | | Arduino Due (SAM3X8E) | 438K | 438K |
| Smoothieboard (LPC1768) | 574K | 574K | | Smoothieboard (LPC1768) | 574K | 574K |
| Duet2 Maestro (SAM4S8C) | 578K | 578K | | Duet2 Maestro (SAM4S8C) | 578K | 578K |
| Smoothieboard (LPC1769) | 661K | 661K | | Smoothieboard (LPC1769) | 661K | 661K |
| Beaglebone PRU | 680K | 680K | | Beaglebone PRU | 680K | 680K |
| Duet2 Wifi/Eth (SAM4E8E) | 686K | 686K | | Duet2 Wifi/Eth (SAM4E8E) | 686K | 686K |
| Adafruit Metro M4 (SAMD51) | 733K | 694K | | Adafruit Metro M4 (SAMD51) | 733K | 694K |
| BigTreeTech SKR Pro (STM32F407) | 922K | 711K |
On AVR platforms, the highest achievable step rate is with just one On AVR platforms, the highest achievable step rate is with just one
stepper stepping. On the SAMD21 and STM32F103 the highest step rate is stepper stepping. On the SAMD21 and STM32F103 the highest step rate is
with two simultaneous steppers stepping. On the SAM3X8E, SAM4S8C, with two simultaneous steppers stepping. On the SAM3X8E, SAM4S8C,
SAM4E8E, LPC176x, and PRU the highest step rate is with three SAM4E8E, LPC176x, and PRU the highest step rate is with three
simultaneous steppers. On the SAMD51, the highest step rate is with simultaneous steppers. On the SAMD51 and STM32F4 the highest step rate
four simultaneous steppers. (Further details on the benchmarks are is with four simultaneous steppers. (Further details on the benchmarks
available in the [Benchmarks document](Benchmarks.md).) are available in the [Benchmarks document](Benchmarks.md).)