1 files changed, 0 insertions, 74 deletions
diff --git a/ports/esp32/espneopixel.c b/ports/esp32/espneopixel.c
deleted file mode 100644
index 0b9308e2c0..0000000000
--- a/ports/esp32/espneopixel.c
+++ /dev/null
@@ -1,74 +0,0 @@
-// Original version from https://github.com/adafruit/Adafruit_NeoPixel
-// Modifications by dpgeorge to support auto-CPU-frequency detection
-
-// This is a mash-up of the Due show() code + insights from Michael Miller's
-// ESP8266 work for the NeoPixelBus library: github.com/Makuna/NeoPixelBus
-// Needs to be a separate .c file to enforce ICACHE_RAM_ATTR execution.
-
-#include "py/mpconfig.h"
-#include "py/mphal.h"
-#include "modesp.h"
-
-void IRAM_ATTR esp_neopixel_write(uint8_t pin, uint8_t *pixels, uint32_t numBytes, uint8_t timing) {
-    uint8_t *p, *end, pix, mask;
-    uint32_t t, time0, time1, period, c, startTime, pinMask, gpio_reg_set, gpio_reg_clear;
-
-    #if !CONFIG_IDF_TARGET_ESP32C3
-    if (pin >= 32) {
-        pinMask = 1 << (pin - 32);
-        gpio_reg_set = GPIO_OUT1_W1TS_REG;
-        gpio_reg_clear = GPIO_OUT1_W1TC_REG;
-    } else
-    #endif
-    {
-        pinMask = 1 << pin;
-        gpio_reg_set = GPIO_OUT_W1TS_REG;
-        gpio_reg_clear = GPIO_OUT_W1TC_REG;
-    }
-    p = pixels;
-    end = p + numBytes;
-    pix = *p++;
-    mask = 0x80;
-    startTime = 0;
-
-    uint32_t fcpu = ets_get_cpu_frequency();
-
-    if (timing == 1) {
-        // 800 KHz
-        time0 = (fcpu * 350) / 1000; // 0.35us
-        time1 = (fcpu * 800) / 1000; // 0.8us
-        period = (fcpu * 1250) / 1000; // 1.25us per bit
-    } else {
-        // 400 KHz
-        time0 = (fcpu * 500) / 1000; // 0.5us
-        time1 = (fcpu * 1200) / 1000; // 1.2us
-        period = (fcpu * 2500) / 1000; // 2.5us per bit
-    }
-
-    uint32_t irq_state = mp_hal_quiet_timing_enter();
-    for (t = time0;; t = time0) {
-        if (pix & mask) {
-            t = time1;                                              // Bit high duration
-        }
-        while (((c = mp_hal_ticks_cpu()) - startTime) < period) {
-            ;                                                       // Wait for bit start
-        }
-        GPIO_REG_WRITE(gpio_reg_set, pinMask);                      // Set high
-        startTime = c;                                              // Save start time
-        while (((c = mp_hal_ticks_cpu()) - startTime) < t) {
-            ;                                                       // Wait high duration
-        }
-        GPIO_REG_WRITE(gpio_reg_clear, pinMask);                    // Set low
-        if (!(mask >>= 1)) {                                        // Next bit/byte
-            if (p >= end) {
-                break;
-            }
-            pix = *p++;
-            mask = 0x80;
-        }
-    }
-    while ((mp_hal_ticks_cpu() - startTime) < period) {
-        ;                                              // Wait for last bit
-    }
-    mp_hal_quiet_timing_exit(irq_state);
-}