Collaboration diagram for USART_Interrupt:

Macros
#define	countof(a) (sizeof(a) / sizeof(*(a)))
#define	RxBufferSize1 TxBufferSize2
#define	RxBufferSize2 TxBufferSize1
#define	TxBufferSize1 (countof(TxBuffer1) - 1)
#define	TxBufferSize2 (countof(TxBuffer2) - 1)

Enumerations
enum	TestStatus { FAILED = 0, PASSED = !FAILED }

Functions
TestStatus	Buffercmp (uint8_t pBuffer1, uint8_t pBuffer2, uint16_t BufferLength)
	Compares two buffers.
void	BusFault_Handler (void)
	This function handles Bus Fault exception.
void	DebugMon_Handler (void)
	This function handles Debug Monitor exception.
void	GPIO_Configuration (void)
	Configures the different GPIO ports.
void	HardFault_Handler (void)
	This function handles Hard Fault exception.
int	main (void)
	Main program.
void	MemManage_Handler (void)
	This function handles Memory Manage exception.
void	NMI_Handler (void)
	This function handles NMI exception.
void	NVIC_Configuration (void)
	Configures the nested vectored interrupt controller.
void	PendSV_Handler (void)
	This function handles PendSV_Handler exception.
void	RCC_Configuration (void)
	Configures the different system clocks.
void	SVC_Handler (void)
	This function handles SVCall exception.
void	SysTick_Handler (void)
	This function handles SysTick Handler.
void	UsageFault_Handler (void)
	This function handles Usage Fault exception.
void	USARTy_IRQHandler (void)
	This function handles USARTy global interrupt request.
void	USARTz_IRQHandler (void)
	This function handles USARTz global interrupt request.

Variables
uint8_t	NbrOfDataToRead1
uint8_t	NbrOfDataToRead1 = RxBufferSize1
uint8_t	NbrOfDataToRead2
uint8_t	NbrOfDataToRead2 = RxBufferSize2
uint8_t	NbrOfDataToTransfer1
uint8_t	NbrOfDataToTransfer1 = TxBufferSize1
uint8_t	NbrOfDataToTransfer2
uint8_t	NbrOfDataToTransfer2 = TxBufferSize2
uint8_t	RxBuffer1 []
uint8_t	RxBuffer1 [RxBufferSize1]
uint8_t	RxBuffer2 []
uint8_t	RxBuffer2 [RxBufferSize2]
__IO uint8_t	RxCounter1
__IO uint8_t	RxCounter1 = 0x00
__IO uint8_t	RxCounter2
__IO uint8_t	RxCounter2 = 0x00
__IO TestStatus	TransferStatus1 = FAILED
__IO TestStatus	TransferStatus2 = FAILED
uint8_t	TxBuffer1 []
uint8_t	TxBuffer1 [] = "USART Interrupt Example: USARTy -> USARTz using Interrupt"
uint8_t	TxBuffer2 []
uint8_t	TxBuffer2 [] = "USART Interrupt Example: USARTz -> USARTy using Interrupt"
__IO uint8_t	TxCounter1
__IO uint8_t	TxCounter1 = 0x00
__IO uint8_t	TxCounter2
__IO uint8_t	TxCounter2 = 0x00
USART_InitTypeDef	USART_InitStructure

Detailed Description

USART Interrupts example

  ******************** (C) COPYRIGHT 2011 STMicroelectronics *******************
  * @file    Device/ST/STM32F10x/Examples/UART_INTERRUPT/readme.txt 
  * @author  MCD Application Team
  * @version V3.5.0
  * @date    08-April-2011
  * @brief   Description of the USART Interrupts example.
  ******************************************************************************
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  ******************************************************************************

Example Description

This example provides a basic communication between USARTy and USARTz using interrupts. USARTy and USARTz can be USART1 and USART2 or USART2 and USART3, depending on the STMicroelectronics EVAL board you are using.

USARTz sends TxBuffer2 to USARTy which sends TxBuffer1 to USARTz. The data received by USARTy and USARTz are stored respectively in RxBuffer1 and RxBuffer2. The data transfer is managed in USARTy_IRQHandler and USARTz_IRQHandler in stm32f10x_it.c file.

USARTy and USARTz configured as follow:

BaudRate = 9600 baud
Word Length = 8 Bits
One Stop Bit
No parity
Hardware flow control disabled (RTS and CTS signals)
Receive and transmit enabled

Directory contents

USART/Interrupt/platform_config.h Evaluation board specific configuration file
USART/Interrupt/stm32f10x_conf.h Library Configuration file
USART/Interrupt/stm32f10x_it.h Interrupt handlers header file
USART/Interrupt/stm32f10x_it.c Interrupt handlers
USART/Interrupt/main.c Main program
USART/Interrupt/system_stm32f10x.c STM32F10x system source file

Hardware and Software environment

This example runs on STM32F10x Connectivity line, High-Density, High-Density Value line, Medium-Density, XL-Density, Medium-Density Value line, Low-Density and Low-Density Value line Devices.

This example has been tested with STMicroelectronics STM32100E-EVAL (High-Density Value line), STM32100B-EVAL (Medium-Density Value line), STM3210C-EVAL (Connectivity line), STM3210E-EVAL (High-Density and XL-Density) and STM3210B-EVAL (Medium-Density) evaluation boards and can be easily tailored to any other supported device and development board. To select the STMicroelectronics evaluation board used to run the example, uncomment the corresponding line in USART/Interrupt/platform_config.h file

STM32100E-EVAL Set-up
- Connect a null-modem female/female RS232 cable between CN10 (USART1) and CN5 (USART2).
  Note
  Make sure that jumper JP5 is not open.
STM32100B-EVAL Set-up
- Connect a null-modem female/female RS232 cable between CN10 (USART1) and CN9 (USART2).
  Note
  In this case USART2 Tx and Rx pins are remapped by software on PD.05 and PD.06 respectively.
STM3210C-EVAL Set-up
- Connect USART2 Tx pin (PD.05) to USART3 Rx pin (PC.11)
- Connect USART2 Rx pin (PD.06) to USART3 Tx pin (PC.10)
  Note
  In this case USART3 Tx and Rx pins are remapped by software. Make sure that jumpers JP19 and JP18 are open.
STM3210E-EVAL Set-up
- Connect a null-modem female/female RS232 cable between CN12 (USART1) and CN8 (USART2).

STM3210B-EVAL Set-up
- Connect a null-modem female/female RS232 cable between CN6 (USART1) and CN5 (USART2).
  - In this case USART2 Tx and Rx pins are remapped by software on PD.05 and PD.06 respectively.

How to use it ?

In order to make the program work, you must do the following :

Copy all source files from this example folder to the template folder under Project
Open your preferred toolchain
Rebuild all files and load your image into target memory
Run the example

Note

Low-density Value line devices are STM32F100xx microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes.
Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes.
Medium-density Value line devices are STM32F100xx microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
High-density Value line devices are STM32F100xx microcontrollers where the Flash memory density ranges between 256 and 512 Kbytes.
High-density devices are STM32F101xx and STM32F103xx microcontrollers where the Flash memory density ranges between 256 and 512 Kbytes.
XL-density devices are STM32F101xx and STM32F103xx microcontrollers where the Flash memory density ranges between 512 and 1024 Kbytes.
Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.

© COPYRIGHT 2011 STMicroelectronics

Macro Definition Documentation

#define countof ( a ) (sizeof(a) / sizeof(*(a)))

Definition at line 53 of file main.c.

#define RxBufferSize1 TxBufferSize2

Definition at line 49 of file main.c.

Referenced by main().

#define RxBufferSize2 TxBufferSize1

Definition at line 50 of file main.c.

Referenced by main().

#define TxBufferSize1 (countof(TxBuffer1) - 1)

Definition at line 47 of file main.c.

#define TxBufferSize2 (countof(TxBuffer2) - 1)

Definition at line 48 of file main.c.

Enumeration Type Documentation

enum TestStatus

Enumerator:

FAILED
PASSED

Definition at line 44 of file main.c.

Function Documentation

TestStatus Buffercmp	(	uint8_t *	pBuffer1,
		uint8_t *	pBuffer2,
		uint16_t	BufferLength
	)

Compares two buffers.

Parameters

pBuffer1,pBuffer2,:	buffers to be compared.
BufferLength,:	buffer's length

Return values

PASSED,: pBuffer1 identical to pBuffer2 FAILED: pBuffer1 differs from pBuffer2

Definition at line 257 of file main.c.

References FAILED, and PASSED.

Referenced by main().

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void BusFault_Handler ( void )

This function handles Bus Fault exception.

Parameters

None

Return values

None

Definition at line 100 of file stm32f10x_it.c.

void DebugMon_Handler ( void )

This function handles Debug Monitor exception.

Parameters

None

Return values

None

Definition at line 135 of file stm32f10x_it.c.

void GPIO_Configuration ( void )

Configures the different GPIO ports.

Parameters

None

Return values

None

Definition at line 190 of file main.c.

References USARTy_GPIO, USARTy_RxPin, USARTy_TxPin, USARTz_GPIO, USARTz_RxPin, and USARTz_TxPin.

Referenced by main().

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void HardFault_Handler ( void )

This function handles Hard Fault exception.

Parameters

None

Return values

None

Definition at line 74 of file stm32f10x_it.c.

int main ( void )

Main program.

Parameters

None

Return values

None

< At this stage the microcontroller clock setting is already configured, this is done through SystemInit() function which is called from startup file (startup_stm32f10x_xx.s) before to branch to application main. To reconfigure the default setting of SystemInit() function, refer to system_stm32f10x.c file

Definition at line 85 of file main.c.

References Buffercmp(), GPIO_Configuration(), NVIC_Configuration(), RCC_Configuration(), RxBufferSize1, RxBufferSize2, USARTy, and USARTz.

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