RGB LED Driver with tight timing requirements (STM32C011J4M6 and WS2812C) I'm trying to talk to a string of WS2812C LEDs with an STM32C011J4M6. The timing requirements are:Here's the schematic. I populated R3 and removed R1:I'm hoping for the simplest hardware implementation, so I'm using the HSI 48MHz clock. This means that each clock cycle is 20.8ns, which means that, for a 0, the pin can only be high for at most 18 clock cycles. With that in mind, I tried to write the most efficient driver that also takes the same time for each bit.My problem is that, when I try to output a string of 1s, the timings vary despite the code being the same for each bit:I get 4 short pulses (840ns, good) followed by 4 longer pulses (1670ns, too long). Somehow, ~45 extra clock cycles are embedded in the long pulses, which doesn't make any sense since the code is the same for each bit.Is the microcontroller doing background tasks or something? Why is the timing different in such a predictable way?Here's my main.c:#include "main.h"
#define NUM_COLOURS 3
#define LED_COU
