diff --git a/lib/oled_ssd1306.c b/lib/oled_ssd1306.c
index cf57871..2d2aa6b 100644
--- a/lib/oled_ssd1306.c
+++ b/lib/oled_ssd1306.c
@@ -68,7 +68,7 @@ bool oled_ssd1306_setup(void)
 		// Addressing Setting
 		0x20, 0x00 // Set Memory Addressing Mode: Horizontal Addressing Mode
 	}; // command to initialize the display
-	return I2C_MASTER_RC_NONE==i2c_master_slave_write(OLED_SSD1306_I2C, OLED_SSD1306_SLAVE, false, oled_init, LENGTH(oled_init)); // send command to initialize display
+	return I2C_MASTER_RC_NONE == i2c_master_slave_write(OLED_SSD1306_I2C, OLED_SSD1306_SLAVE, false, oled_init, LENGTH(oled_init)); // send command to initialize display
 }
 
 void oled_ssd1306_on(void)
@@ -109,7 +109,7 @@ void oled_ssd1306_test(void)
 void oled_ssd1306_display(const uint8_t* display_data, uint16_t display_length)
 {
 	// verify input
-	if (0==display_length || NULL==display_data) {
+	if (0 == display_length || NULL == display_data) {
 		return;
 	}
 
@@ -120,19 +120,19 @@ void oled_ssd1306_display(const uint8_t* display_data, uint16_t display_length)
 		0x10 // Set Higher Column Start Address for Page Addressing Mode: 0
 	}; // command to set addressing mode
 	i2c_master_slave_write(OLED_SSD1306_I2C, OLED_SSD1306_SLAVE, false, oled_start_page, LENGTH(oled_start_page)); // send command to set addressing mode
-	if (I2C_MASTER_RC_NONE!=i2c_master_start(OLED_SSD1306_I2C)) { // send start condition
+	if (I2C_MASTER_RC_NONE != i2c_master_start(OLED_SSD1306_I2C)) { // send start condition
 		return;
 	}
-	if (I2C_MASTER_RC_NONE!=i2c_master_select_slave(OLED_SSD1306_I2C, OLED_SSD1306_SLAVE, false, true)) { // select OLED display
+	if (I2C_MASTER_RC_NONE != i2c_master_select_slave(OLED_SSD1306_I2C, OLED_SSD1306_SLAVE, false, true)) { // select OLED display
 		return;
 	}
 	const uint8_t oled_data[] = {
 		0x40, // control byte: continuous (multiple byes), data
 	};
-	if (I2C_MASTER_RC_NONE!=i2c_master_write(OLED_SSD1306_I2C, oled_data, LENGTH(oled_data))) { // send data header
+	if (I2C_MASTER_RC_NONE != i2c_master_write(OLED_SSD1306_I2C, oled_data, LENGTH(oled_data))) { // send data header
 		return;
 	}
-	if (I2C_MASTER_RC_NONE!=i2c_master_write(OLED_SSD1306_I2C, display_data, display_length)) { // send template picture to display
+	if (I2C_MASTER_RC_NONE != i2c_master_write(OLED_SSD1306_I2C, display_data, display_length)) { // send template picture to display
 		return;
 	}
 	i2c_master_stop(OLED_SSD1306_I2C); // send stop condition