--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Small_CPU/Src/uart.c	Sat Apr 28 11:52:34 2018 +0200
@@ -0,0 +1,76 @@
+/**
+  ******************************************************************************
+  * @file    uart.c 
+  * @author  heinrichs weikamp gmbh
+  * @version V0.0.1
+  * @date    27-March-2014
+  * @brief   button control
+  *           
+  @verbatim                 
+  ============================================================================== 
+                        ##### How to use #####
+  ============================================================================== 
+  @endverbatim
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2015 heinrichs weikamp</center></h2>
+  *
+  ******************************************************************************
+  */ 
+/* Includes ------------------------------------------------------------------*/
+#include "uart.h"
+
+/* Private variables ---------------------------------------------------------*/
+
+UART_HandleTypeDef huart2;
+
+
+/* Exported functions --------------------------------------------------------*/
+
+void MX_USART2_UART_Init(void)
+{
+/* pullup special */
+  GPIO_InitTypeDef   GPIO_InitStructure;
+  __GPIOA_CLK_ENABLE();
+  GPIO_InitStructure.Pin = GPIO_PIN_2;
+  GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
+  GPIO_InitStructure.Pull = GPIO_PULLUP;
+  GPIO_InitStructure.Speed = GPIO_SPEED_FAST;
+  HAL_GPIO_Init(GPIOA, &GPIO_InitStructure); 
+
+/* regular init */	
+  huart2.Instance = USART2;
+  huart2.Init.BaudRate = 1200;
+  huart2.Init.WordLength = UART_WORDLENGTH_8B;
+  huart2.Init.StopBits = UART_STOPBITS_1;
+  huart2.Init.Parity = UART_PARITY_NONE;
+  huart2.Init.Mode = UART_MODE_TX_RX;
+  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
+  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
+  HAL_UART_Init(&huart2);
+}
+
+
+uint8_t UART_ButtonAdjust(uint8_t *array)
+{
+	uint8_t answer[4];
+	
+	HAL_UART_Transmit(&huart2,array,4,1000);
+	HAL_UART_Receive(&huart2,answer,4,2000);
+	if(	(answer[0] == array[0])
+		&&(answer[1] == array[1])
+		&&(answer[2] == array[2])
+		&&(answer[3] == array[3]))
+	return 1;
+	else
+	return 0;
+}
+
+void MX_USART2_UART_DeInit(void)
+{
+	HAL_UART_DeInit(&huart2);
+}
+
+
+/************************ (C) COPYRIGHT heinrichs weikamp *****END OF FILE****/