Qubo Screen Bug -

void safe_write(uint8_t *data, size_t len) disable_interrupts(); // Prevent mid-transfer corruption cs_low(); for (int i = 0; i < len; i++) spi_write(data[i]); while (spi_busy()); // Wait for complete cs_high(); enable_interrupts();

void clear_and_redraw() send_command(CLEAR_ALL_SEGMENTS); delay_ms(50); // Allow discharge for (int i = 0; i < NUM_SEGMENTS; i++) update_segment(i, framebuffer[i]); delay_us(500); // Avoid charge bleeding qubo screen bug

Would you like a more specific troubleshooting checklist for your particular QUBO model (e.g., from a thermostat, calculator, or DIY kit)? void safe_write(uint8_t *data