diff --git a/Core/Src/main.c b/Core/Src/main.c
index 0411f37..8a75d2c 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -29,14 +29,24 @@
 
 /* Private typedef -----------------------------------------------------------*/
 /* USER CODE BEGIN PTD */
-#define CS1_OFF()		HAL_GPIO_WritePin(CS1_GPIO_Port, CS1_Pin, GPIO_PIN_SET)
-#define CS1_ON()		HAL_GPIO_WritePin(CS1_GPIO_Port, CS1_Pin, GPIO_PIN_RESET)
-#define CS2_OFF()		HAL_GPIO_WritePin(CS2_GPIO_Port, CS2_Pin, GPIO_PIN_SET)
-#define CS2_ON()		HAL_GPIO_WritePin(CS2_GPIO_Port, CS2_Pin, GPIO_PIN_RESET)
-#define CS3_OFF()		HAL_GPIO_WritePin(CS3_GPIO_Port, CS3_Pin, GPIO_PIN_SET)
-#define CS3_ON()		HAL_GPIO_WritePin(CS3_GPIO_Port, CS3_Pin, GPIO_PIN_RESET)
-#define RESET_ON()		HAL_GPIO_WritePin(RESET_GPIO_Port, RESET_Pin, GPIO_PIN_SET)
-#define RESET_OFF()		HAL_GPIO_WritePin(RESET_GPIO_Port, RESET_Pin, GPIO_PIN_RESET)
+void GPIO_Set(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
+{
+	GPIOx->BSRR = (uint32_t)GPIO_Pin;
+}
+
+void GPIO_Reset(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
+{
+	GPIOx->BRR = (uint32_t)GPIO_Pin;
+}
+
+#define CS1_OFF()		GPIO_Set(CS1_GPIO_Port, CS1_Pin)
+#define CS1_ON()		GPIO_Reset(CS1_GPIO_Port, CS1_Pin)
+#define CS2_OFF()		GPIO_Set(CS2_GPIO_Port, CS2_Pin)
+#define CS2_ON()		GPIO_Reset(CS2_GPIO_Port, CS2_Pin)
+#define CS3_OFF()		GPIO_Set(CS3_GPIO_Port, CS3_Pin)
+#define CS3_ON()		GPIO_Reset(CS3_GPIO_Port, CS3_Pin)
+#define RESET_ON()		GPIO_Set(RESET_GPIO_Port, RESET_Pin)
+#define RESET_OFF()		GPIO_Reset(RESET_GPIO_Port, RESET_Pin)
 /* USER CODE END PTD */
 
 /* Private define ------------------------------------------------------------*/
@@ -121,17 +131,17 @@ int main(void)
   while (1)
   {
 	  CS1_ON();
-	 res = HAL_SPI_TransmitReceive_IT(&hspi1,  data_in, data_out, sizeof(data_in) / sizeof(data_in[0]));
+	  res = HAL_SPI_TransmitReceive_IT(&hspi1,  data_in, data_out, sizeof(data_in) / sizeof(data_in[0]));
 	  while(!flag_receive && res == 0);
-
 	  CS1_OFF();
 	  flag_receive = 0;
+
 	  CS2_ON();
 	  res = HAL_SPI_TransmitReceive_IT(&hspi1, data_in, &data_out[6], sizeof(data_in) / sizeof(data_in[0]));
 	  while(!flag_receive && res == 0);
-
 	  CS2_OFF();
 	  flag_receive = 0;
+
 	  CS3_ON();
 	  res = HAL_SPI_TransmitReceive_IT(&hspi1, data_in, &data_out[12], sizeof(data_in) / sizeof(data_in[0]));
 	  while(!flag_receive && res == 0) ;
@@ -144,8 +154,7 @@ int main(void)
 
 	  if(res == 0)
 	  {
-		  sprintf (str, "%i;%i;%i;%i;%i;%i\r\n", data[0].rate, data[1].rate, data[2].rate, data[0].temp, data[1].temp, data[2].temp);
-		  res = HAL_UART_Transmit_DMA(&huart1, (uint8_t*)str, sizeof(str) / sizeof(str[0]));
+		  res = sprintf (str, "%i;%i;%i;%i;%i;%i\r\n", data[0].rate, data[1].rate, data[2].rate, data[0].temp, data[1].temp, data[2].temp);
 		  while(flag_transmit);
 		  flag_transmit = 1;
 		  HAL_UART_Transmit_DMA(&huart1, (uint8_t*)str, res);
@@ -333,16 +342,12 @@ static void MX_GPIO_Init(void)
 /* USER CODE BEGIN 4 */
 void HAL_SPI_TxRxCpltCallback(SPI_HandleTypeDef *hspi)
 {
-
-		flag_receive = 1;
-
+	flag_receive = 1;
 }
 
 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
 {
-
-		flag_transmit = 0;
-
+	flag_transmit = 0;
 }
 /* USER CODE END 4 */