diff --git a/oled.c b/oled.c
index a63d810a9..926428e77 100644
--- a/oled.c
+++ b/oled.c
@@ -82,11 +82,12 @@ static bool is_debug_mode = 0;
 inline void SPISend(uint32_t base, uint8_t *data, int len)
 {
 	int i;
-	delay(400);
+	delay(1);
 	for (i = 0; i < len; i++) {
 		spi_send(base, data[i]);
 	}
-	delay(800);
+	while (!(SPI_SR(base) & SPI_SR_TXE));
+	while ((SPI_SR(base) & SPI_SR_BSY));
 }
 
 /*
@@ -364,18 +365,12 @@ void oledFrame(int x1, int y1, int x2, int y2)
 void oledSwipeLeft(void)
 {
 	int i, j, k;
-	for (i = 0; i < OLED_WIDTH / 4; i++) {
+	for (i = 0; i < OLED_WIDTH; i++) {
 		for (j = 0; j < OLED_HEIGHT / 8; j++) {
-			for (k = OLED_WIDTH / 4 - 1; k > 0; k--) {
-				_oledbuffer[k * 4 + 3 + j * OLED_WIDTH] = _oledbuffer[k * 4 - 1 + j * OLED_WIDTH];
-				_oledbuffer[k * 4 + 2 + j * OLED_WIDTH] = _oledbuffer[k * 4 - 2 + j * OLED_WIDTH];
-				_oledbuffer[k * 4 + 1 + j * OLED_WIDTH] = _oledbuffer[k * 4 - 3 + j * OLED_WIDTH];
-				_oledbuffer[k * 4 + 0 + j * OLED_WIDTH] = _oledbuffer[k * 4 - 4 + j * OLED_WIDTH];
+			for (k = OLED_WIDTH-1; k > 0; k--) {
+				_oledbuffer[j * OLED_WIDTH + k] = _oledbuffer[j * OLED_WIDTH + k - 1];
 			}
 			_oledbuffer[j * OLED_WIDTH] = 0;
-			_oledbuffer[j * OLED_WIDTH + 1] = 0;
-			_oledbuffer[j * OLED_WIDTH + 2] = 0;
-			_oledbuffer[j * OLED_WIDTH + 3] = 0;
 		}
 		oledRefresh();
 	}
diff --git a/setup.c b/setup.c
index c85bd8d0c..b91c2d693 100644
--- a/setup.c
+++ b/setup.c
@@ -55,7 +55,7 @@ void setup(void)
 	gpio_set_af(GPIOA, GPIO_AF5, GPIO5 | GPIO7);
 
 //	spi_disable_crc(SPI1);
-	spi_init_master(SPI1, SPI_CR1_BAUDRATE_FPCLK_DIV_64, SPI_CR1_CPOL_CLK_TO_0_WHEN_IDLE, SPI_CR1_CPHA_CLK_TRANSITION_1, SPI_CR1_DFF_8BIT, SPI_CR1_MSBFIRST);
+	spi_init_master(SPI1, SPI_CR1_BAUDRATE_FPCLK_DIV_8, SPI_CR1_CPOL_CLK_TO_0_WHEN_IDLE, SPI_CR1_CPHA_CLK_TRANSITION_1, SPI_CR1_DFF_8BIT, SPI_CR1_MSBFIRST);
 	spi_enable_ss_output(SPI1);
 //	spi_enable_software_slave_management(SPI1);
 //	spi_set_nss_high(SPI1);
@@ -71,4 +71,5 @@ void setupApp(void)
 {
 	// hotfix for old bootloader
 	gpio_mode_setup(GPIOA, GPIO_MODE_INPUT, GPIO_PUPD_NONE, GPIO9);
+	spi_init_master(SPI1, SPI_CR1_BAUDRATE_FPCLK_DIV_8, SPI_CR1_CPOL_CLK_TO_0_WHEN_IDLE, SPI_CR1_CPHA_CLK_TRANSITION_1, SPI_CR1_DFF_8BIT, SPI_CR1_MSBFIRST);
 }