CTL_STATUS_t platform_set_digital_pin_speed(int pin, int kHz);
platform_set_digital_pin_speed sets the pin speed for digital I/O.
If a device cannot support the pin speed, platform_set_digital_pin_speed returns a configuration error.
The pin speeds supported by various platforms are:
| Processor | Speeds (MHz) |
| STM32L1 | 0.4, 2, 10, 40 |
| STM32F1 | 2, 25, 50 |
| STM32F4 | 2, 25, 50, 100 |
| LM3S | Not configurable |
| LPC1700 | Not configurable |
| KL05Z | Not configurable |
| KL25Z | Not configurable |
platform_set_multi_digital_pin_speed, platform_digital_pin_speed