/*
* This method is non-blocking unless an existing LED update is in progress.
* it does not wait until all the LEDs have been updated, that happens in the background.
*/
void ws2811UpdateStrip(void)
{
static uint32_t waitCounter = 0;
static rgbColor24bpp_t *rgb24;
// wait until previous transfer completes
while(ws2811LedDataTransferInProgress) {
waitCounter++;
}
dmaBufferOffset = 0; // reset buffer memory index
ledIndex = 0; // reset led index
// fill transmit buffer with correct compare values to achieve
// correct pulse widths according to color values
while (ledIndex < WS2811_LED_STRIP_LENGTH)
{
rgb24 = hsvToRgb24(&ledColorBuffer[ledIndex]);
#ifdef USE_FAST_DMA_BUFFER_IMPL
fastUpdateLEDDMABuffer(rgb24);
#else
updateLEDDMABuffer(rgb24->rgb.g);
updateLEDDMABuffer(rgb24->rgb.r);
updateLEDDMABuffer(rgb24->rgb.b);
#endif
ledIndex++;
}
ws2811LedDataTransferInProgress = 1;
ws2811LedStripDMAEnable();
}
/*
* This method is non-blocking unless an existing LED update is in progress.
* it does not wait until all the LEDs have been updated, that happens in the background.
*/
void ws2811UpdateStrip(void)
{
static rgbColor24bpp_t *rgb24;
// don't wait - risk of infinite block, just get an update next time round
if (ws2811LedDataTransferInProgress) {
return;
}
dmaBufferOffset = 0; // reset buffer memory index
ledIndex = 0; // reset led index
// fill transmit buffer with correct compare values to achieve
// correct pulse widths according to color values
while (ledIndex < WS2811_LED_STRIP_LENGTH)
{
rgb24 = hsvToRgb24(&ledColorBuffer[ledIndex]);
#ifdef USE_FAST_DMA_BUFFER_IMPL
fastUpdateLEDDMABuffer(rgb24);
#else
updateLEDDMABuffer(rgb24->rgb.g);
updateLEDDMABuffer(rgb24->rgb.r);
updateLEDDMABuffer(rgb24->rgb.b);
#endif
ledIndex++;
}
ws2811LedDataTransferInProgress = 1;
ws2811LedStripDMAEnable();
}