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/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : readme.txt
* Author : MCD Application Team
* Version : V2.0.1
* Date : 06/13/2008
* Description : Description of the DMA I2C 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 description of how to use two DMA channels to transfer a
data buffer from memory to I2C2 through I2C1.
I2C1 is set as the master transmitter and I2C2 as the slave receiver. DMA1 Channel5 is
configured to store the data received from I2C2 into the Rx buffer (reception buffer).
DMA1 Channel6 is configured to transfer data from the Tx buffer (transmission buffer) to
the I2C1 DR register. After the generation of the Start condition and once the slave
address has been acknowledged, DMA capability is enabled for both I2C1 and I2C2. As soon as the
two I2C DMAEN bits are set in the I2C1_CR2 and I2C2_CR2 registers, the transmission of
the Tx buffer is started by DMA1 Channel5 and at the same time the data received on
I2C2 is stored in Rx buffer using DMA1 Channel6 . The transmitted and the received buffers
are compared to check that all data have been correctly transferred.
Directory contents
==================
stm32f10x_conf.h Library Configuration file
stm32f10x_it.c Interrupt handlers
stm32f10x_it.h Interrupt handlers header file
main.c Main program
Hardware environment
====================
This example runs on STMicroelectronics STM3210B-EVAL and STM3210E-EVAL evaluation
boards and can be easily tailored to any other hardware.
- Connect I2C1 SCL pin (PB.06) to I2C2 SCL pin (PB.10)
- Connect I2C1 SDA pin (PB.07) to I2C2 SDA pin (PB.11)
- Check that a pull-up resistor is connected on one I2C SDA pin
- Check that a pull-up resistor is connected on one I2C SCL pin
How to use it
=============
In order to make the program work, you must do the following :
- Create a project and setup all your toolchain's start-up files
- Compile the directory content files and required Library files :
+ stm32f10x_lib.c
+ stm32f10x_dma.c
+ stm32f10x_rcc.c
+ stm32f10x_i2c.c
+ stm32f10x_nvic.c
+ stm32f10x_gpio.c
+ stm32f10x_flash.c
- Link all compiled files and load your image into target memory
- Run the example
******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE******
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