diff --git a/lib/led_ws2812b.c b/lib/led_ws2812b.c
index 6774240..8bcd658 100644
--- a/lib/led_ws2812b.c
+++ b/lib/led_ws2812b.c
@@ -50,8 +50,8 @@
  */
 #define LED_WS2812B_SPI_TEMPLATE 0x924924
 
-uint8_t led_ws2812b_data[LED_WS2812B_LEDS * 3 * 3 + 40 * 3 / 8 + 1] = {0};  /**< data encoded to be shifted out by SPI for the WS2812B, plus the 50us reset (~40 data bits) */
-static volatile bool transmit_flag = false; /**< flag set in software when transmission started, clear by interrupt when transmission completed */
+/** data encoded to be shifted out by SPI for the WS2812B, plus the 50us reset (~40 data bits) */
+uint8_t led_ws2812b_data[LED_WS2812B_LEDS * 3 * 3 + 40 * 3 / 8 + 1] = {0};
 
 void led_ws2812b_set_rgb(uint16_t led, uint8_t red, uint8_t green, uint8_t blue)
 {
@@ -59,10 +59,6 @@ void led_ws2812b_set_rgb(uint16_t led, uint8_t red, uint8_t green, uint8_t blue)
 	if (led >= LED_WS2812B_LEDS) {
 		return;
 	}
-	// wait for transmission to complete before changing the color
-	while (transmit_flag) {
-		__WFI();
-	}
 
 	const uint8_t colors[] = {green, red, blue}; // color order for the WS2812B
 	const uint8_t pattern_bit[] = {0x02, 0x10, 0x80, 0x04, 0x20, 0x01, 0x08, 0x40}; // which bit to change in the pattern
@@ -77,28 +73,24 @@ void led_ws2812b_set_rgb(uint16_t led, uint8_t red, uint8_t green, uint8_t blue)
 			}
 		}
 	}
-}
 
-bool led_ws2812b_transmit(void)
-{
-	if (transmit_flag) { // a transmission is already ongoing
-		return false;
-	}
-	transmit_flag = true; // remember transmission started
-	dma_set_memory_address(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI), (uint32_t)led_ws2812b_data);
-	dma_set_number_of_data(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI), LENGTH(led_ws2812b_data)); // set the size of the data to transmit
-	dma_enable_transfer_complete_interrupt(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI)); // warm when transfer is complete to stop transmission
-	dma_enable_channel(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI)); // enable DMA channel
-
-	spi_enable_tx_dma(SPI(LED_WS2812B_SPI)); // use DMA to provide data stream to be transferred
-
-	return true;
 }
 
 void led_ws2812b_setup(void)
 {
+	// fill buffer with bit pattern
+	for (uint16_t i = 0; i < LED_WS2812B_LEDS * 3; i++) {
+		led_ws2812b_data[i * 3 + 0] = (uint8_t)(LED_WS2812B_SPI_TEMPLATE >> 16);
+		led_ws2812b_data[i * 3 + 1] = (uint8_t)(LED_WS2812B_SPI_TEMPLATE >> 8);
+		led_ws2812b_data[i * 3 + 2] = (uint8_t)(LED_WS2812B_SPI_TEMPLATE >> 0);
+	}
+	// fill remaining with with 0 to encode the reset code
+	for (uint16_t i = LED_WS2812B_LEDS * 3 * 3; i < LENGTH(led_ws2812b_data); i++) {
+		led_ws2812b_data[i] = 0;
+	}
+
 	// setup SPI to transmit data
-	rcc_periph_clock_enable(RCC_SPI_MISO_PORT(LED_WS2812B_SPI)); // enable clock for SPI output peripheral
+	rcc_periph_clock_enable(RCC_SPI_MOSI_PORT(LED_WS2812B_SPI)); // enable clock for SPI output peripheral
 	gpio_set_mode(SPI_MOSI_PORT(LED_WS2812B_SPI), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, SPI_MOSI_PIN(LED_WS2812B_SPI)); // set MISO as output (needs to be shifted to 5V)
 	rcc_periph_clock_enable(RCC_AFIO); // enable clock for SPI alternate function
 	rcc_periph_clock_enable(RCC_SPI(LED_WS2812B_SPI)); // enable clock for SPI peripheral
@@ -118,37 +110,15 @@ void led_ws2812b_setup(void)
 	// configure DMA to provide the pattern to be shifted out from SPI to the WS2812B LEDs
 	rcc_periph_clock_enable(RCC_DMA_SPI(LED_WS2812B_SPI)); // enable clock for DMA peripheral
 	dma_channel_reset(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI)); // start with fresh channel configuration
-	dma_set_memory_address(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI), (uint32_t)led_ws2812b_data); // set bit pattern as source address
-	dma_set_peripheral_address(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI), (uint32_t)&SPI_DR(SPI(LED_WS2812B_SPI)));  // set SPI as peripheral destination address
 	dma_set_read_from_memory(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI)); // set direction from memory to peripheral
-	dma_enable_memory_increment_mode(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI)); // go through bit pattern
 	dma_set_memory_size(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI), DMA_CCR_MSIZE_8BIT); // read 8 bits from memory
+	dma_set_memory_address(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI), (uint32_t)led_ws2812b_data); // set bit pattern as source address
+	dma_enable_memory_increment_mode(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI)); // go through bit pattern
+	dma_set_number_of_data(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI), LENGTH(led_ws2812b_data)); // set the size of the data to transmit
+	dma_set_peripheral_address(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI), (uint32_t)&SPI_DR(SPI(LED_WS2812B_SPI)));  // set SPI as peripheral destination address
 	dma_set_peripheral_size(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI), DMA_CCR_PSIZE_8BIT); // write 8 bits to peripheral
 	dma_set_priority(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI), DMA_CCR_PL_HIGH); // set priority to high since time is crucial for the peripheral
-	nvic_enable_irq(DMA_IRQ_SPI_TX(LED_WS2812B_SPI)); // enable interrupts for this DMA channel
-
-	// fill buffer with bit pattern
-	for (uint16_t i = 0; i < LED_WS2812B_LEDS * 3; i++) {
-		led_ws2812b_data[i * 3 + 0] = (uint8_t)(LED_WS2812B_SPI_TEMPLATE >> 16);
-		led_ws2812b_data[i * 3 + 1] = (uint8_t)(LED_WS2812B_SPI_TEMPLATE >> 8);
-		led_ws2812b_data[i * 3 + 2] = (uint8_t)(LED_WS2812B_SPI_TEMPLATE >> 0);
-	}
-	// fill remaining with with 0 to encode the reset code
-	for (uint16_t i = LED_WS2812B_LEDS * 3 * 3; i < LENGTH(led_ws2812b_data); i++) {
-		led_ws2812b_data[i] = 0;
-	}
-	led_ws2812b_transmit(); // set LEDs
-}
-
-/** DMA interrupt service routine to stop transmission after it finished */
-void DMA_ISR_SPI_TX(LED_WS2812B_SPI)(void)
-{
-	if (dma_get_interrupt_flag(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI), DMA_TCIF)) { // transfer completed
-		dma_clear_interrupt_flags(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI), DMA_TCIF); // clear flag
-		dma_disable_transfer_complete_interrupt(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI)); // stop warning transfer completed
-		spi_disable_tx_dma(SPI(LED_WS2812B_SPI)); // stop SPI asking for more data
-		while (SPI_SR(SPI(LED_WS2812B_SPI)) & SPI_SR_BSY); // wait for data to be shifted out
-		dma_disable_channel(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI)); // stop using DMA
-		transmit_flag = false; // transmission completed
-	}
+	dma_enable_circular_mode(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI)); // always send the data
+	dma_enable_channel(DMA_SPI(LED_WS2812B_SPI), DMA_CHANNEL_SPI_TX(LED_WS2812B_SPI)); // enable DMA channel
+	spi_enable_tx_dma(SPI(LED_WS2812B_SPI)); // use DMA to provide data stream to be transferred
 }
diff --git a/lib/led_ws2812b.h b/lib/led_ws2812b.h
index e36584f..3817ee5 100644
--- a/lib/led_ws2812b.h
+++ b/lib/led_ws2812b.h
@@ -33,7 +33,3 @@ void led_ws2812b_setup(void);
  *  @note transmission needs to be done separately
  */
 void led_ws2812b_set_rgb(uint16_t led, uint8_t red, uint8_t green, uint8_t blue);
-/** transmit color values to WS2812B LEDs
- *  @return true if transmission started, false if another transmission is already ongoing
- */
-bool led_ws2812b_transmit(void);