esp32/espneopixel: Add support for GPIO32 and GPIO33.
Adds support for NeoPixels on GPIO32 and GPIO33 on ESP32.  Otherwise,
NeoPixels wired to GPIO32/33 wll silently fail without any hints to the
user.
With thanks to
Fixes issue
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;
+ uint32_t t, time0, time1, period, c, startTime, pinMask, gpio_reg_set, gpio_reg_clear;
+ if (pin < 32) {
pinMask = 1 << pin;
+ gpio_reg_set = GPIO_OUT_W1TS_REG;
+ gpio_reg_clear = GPIO_OUT_W1TC_REG;
+ } else {
+ pinMask = 1 << (pin - 32);
+ gpio_reg_set = GPIO_OUT1_W1TS_REG;
+ gpio_reg_clear = GPIO_OUT1_W1TC_REG;
+ }
p = pixels;
end = p + numBytes;
pix = *p++;
@@ -42,12 +50,12 @@ void IRAM_ATTR esp_neopixel_write(uint8_t pin, uint8_t *pixels, uint32_t numByte
while (((c = mp_hal_ticks_cpu()) - startTime) < period) {
; // Wait for bit start
}
- GPIO_REG_WRITE(GPIO_OUT_W1TS_REG, pinMask); // Set high
+ 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_OUT_W1TC_REG, pinMask); // Set low
+ GPIO_REG_WRITE(gpio_reg_clear, pinMask); // Set low
if (!(mask >>= 1)) { // Next bit/byte
if (p >= end) {
break;
