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--- courses:be5b99cpl:labs:lab03 [2018/10/04 15:47]
+++ courses:be5b99cpl:labs:lab03 [2018/10/04 15:47] (current)
@@ Line 1: / Line 1: @@
+====== Lab03 - Nucleo Echo ======
+  * Download sources for a sample project for NUCLEOF401RE {{courses:be5b99cpl:labs:01stm32f401.tar.gz|}}
+  * Get familiar with the project in OpenSTM32 System Workbench
+  * Compile and upload the project into the embedded board
+  * Find the appropriate device (serial line) to receive data - use cat commnad to receive the data
+  * Write a program which will open the communication device and prints the data sent from Nucleo
+  * Get familiar with HomeWork 02
+===== OpenSTM32 System Workbench =====
+The development environment is available in ''/usr/local/Ac6/SystemWorkbench'' and then to start it write ''./eclipse'' . The details about the environment are available at [[http://www.openstm32.org]]
+<code>
+cd /usr/local/Ac6/SystemWorkbench
+./eclipse
+</code>
+===== Lab submission =====
+Show to the lab instructor you can:
+  * Compile the project
+  * Transmit the data from NUCLEO to PC (known serial interface)
+===== NUCLEO Test Code =====
+This is the code from {{courses:be5b99cpl:labs:01stm32f401.tar.gz|}} main.c which initialize the HW and allows to send a string from NUCLEO to PC.
+<code c>
+//
+//  ******************************************************************************
+//  @file    main.c
+//  @author  CPL (Pavel Paces, based on STM examples)
+//  @version V0.0
+//  @date    01-October-2016
+//  @brief   Serial line over ST-Link example
+//  Nucleo STM32F401RE USART2 (Tx PA.2, Rx PA.3)
+//
+//  ******************************************************************************
+//
+#include "stm32f4xx.h"
+// *******************************************************************************
+//
+//  @brief  Enable MCU internal connections to USART and GPIO
+//
+void RCC_Configuration(void)
+{
+  // --- System Clocks Configuration
+  // USART2 clock enable
+  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
+  // GPIOA clock enable
+  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
+} // END void RCC_Configuration(void)
+// *******************************************************************************
+//
+//  @brief  Input/output pins configuration
+//
+void GPIO_Configuration(void)
+{
+  GPIO_InitTypeDef GPIO_InitStructure;
+  // GPIO Configuration
+  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3; // PA.2 USART2_TX, PA.3 USART2_RX
+  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
+  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
+  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
+  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
+  GPIO_Init(GPIOA, &GPIO_InitStructure);
+  // Alternative Functions: Connect USART pins to AF
+  GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_USART2);
+  GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_USART2);
+} // END void GPIO_Configuration(void)
+// *******************************************************************************
+//
+//  @brief  Baud rate settings
+//
+void USART2_Configuration(void)
+{
+  USART_InitTypeDef USART_InitStructure;
+  // USARTx configuration
+  //  - BaudRate = 115200 baud
+  //  - Word Length = 8 Bits
+  //  - One Stop Bit
+  //  - No parity
+  //  - Hardware flow control disabled (RTS and CTS signals)
+  //  - Receive and transmit enabled
+  USART_InitStructure.USART_BaudRate 	= (9600)*3;
+  USART_InitStructure.USART_WordLength 	= USART_WordLength_8b;
+  USART_InitStructure.USART_StopBits 	= USART_StopBits_1;
+  USART_InitStructure.USART_Parity 		= USART_Parity_No;
+  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
+  USART_InitStructure.USART_Mode 		= USART_Mode_Rx | USART_Mode_Tx;
+  USART_Init(USART2, &USART_InitStructure);
+  USART_Cmd(USART2, ENABLE);
+} // END void USART2_Configuration(void)
+// *******************************************************************************
+//
+//  @brief  The function sends characters until 0
+//
+void OutString(char *s)
+{
+	while(*s)
+	{
+		// Wait for Tx Empty
+		while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET);
+		// Send Char
+		USART_SendData(USART2, *s++);
+	} // END while
+} // END void OutString(char *s)
+// *******************************************************************************
+//
+//  @brief  Main loop
+//
+int main(void)
+{
+	// Init
+	RCC_Configuration();
+	GPIO_Configuration();
+	USART2_Configuration();
+	// Process
+	OutString("Welcome to Nucleo F401RE\r\n");
+	while(1) // Don't want to exit
+	{
+		uint16_t Data;
+		while(USART_GetFlagStatus(USART2, USART_FLAG_RXNE) == RESET); // Wait for Char
+		Data = USART_ReceiveData(USART2); // Collect Char
+		while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET); // Wait for Empty
+		OutString("Welcome to Nucleo F401RE\r\n");
+		USART_SendData(USART2, Data); // Echo Char
+		OutString("\n");
+	} // END while(1)
+} // END main
+// *******************************************************************************
+#ifdef  USE_FULL_ASSERT
+/**
+  * @brief  Reports the name of the source file and the source line number
+  *         where the assert_param error has occurred.
+  * @param  file: pointer to the source file name
+  * @param  line: assert_param error line source number
+  * @retval None
+  */
+void assert_failed(uint8_t* file, uint32_t line)
+{
+  /* User can add his own implementation to report the file name and line number,
+     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
+  while (1)
+  {}
+}
+#endif
+</code>