main.c

I2c接口编程

/******************** (C) COPYRIGHT 2003 STMicroelectronics ********************
* File Name          : main.c
* Author             : MCD Application Team
* Date First Issued  : 16/05/2003
* Description        : example using the I2C library for transmission of buffers
*                      between the two I2C modules
********************************************************************************
* History:
*  16/05/03 : Created.
*******************************************************************************/
#include "71x_lib.h"

#define I2C0_SCL 0x2000
#define I2C0_SDA 0x4000
#define I2C1_SCL 0x0004
#define I2C1_SDA 0x0008

void Main(void)
{
	I2C_Tx_Status SendResult;
	u8 bTableau[10] = {1, 2, 3, 4, 15};
	u8 *pBuffer = bTableau;

#ifdef DEBUG
	debug();
#endif

	//Configure the SDA And the SCL pin of the I2C0 and I2C1 to alternate function Open Drain
	GPIO_Config(GPIO1, I2C0_SCL, GPIO_AF_OD);
	GPIO_Config(GPIO1, I2C0_SDA, GPIO_AF_OD);
	GPIO_Config(GPIO0, I2C1_SCL, GPIO_AF_OD);
	GPIO_Config(GPIO0, I2C1_SDA, GPIO_AF_OD);

	//configure the Interrupt to be used
	EIC_IRQChannelPriorityConfig(I2C1_IRQChannel, 0x05);
	EIC_IRQChannelConfig(I2C1_IRQChannel, ENABLE);
	EIC_IRQConfig(ENABLE);
	EIC_IRQChannelPriorityConfig(I2C1ITERR_IRQChannel, 0x05);
	EIC_IRQChannelConfig(I2C1ITERR_IRQChannel, ENABLE);
	EIC_IRQConfig(ENABLE);

	//Configure the I2C1 module
	I2C_Init(I2C1);
	I2C_FCLKConfig(I2C1);
	//Enable the I2C1
	I2C_OnOffConfig(I2C1, ENABLE);
	//Configure the I2C1 speed
	I2C_SpeedConfig(I2C1, 100000);
	//Configure the I2C1 address (to be used specially when this cell has to be adressed)
	I2C_AddressConfig(I2C1,0x3C0, I2C_Mode10);
	//Enable the Acknowledge
	I2C_AcknowledgeConfig(I2C1, ENABLE);
	// Enable the interrupt generation
	I2C_ITConfig(I2C1, ENABLE);
	//Configure I2C0 module
	I2C_Init(I2C0);
	I2C_FCLKConfig(I2C0);
	//Enable the I2C0
	I2C_OnOffConfig(I2C0, ENABLE);
	//Configure the I2C0 speed
	I2C_SpeedConfig(I2C0, 100000);
	//Configure the I2C0 address (to be used specially when this cell has to be adressed)
	I2C_AddressConfig(I2C0,0x3A0, I2C_Mode10);
	//Enable Start generation
	I2C_STARTGenerate(I2C0, ENABLE);
	//Wait til the SB flag is set to confirm the START generation
	while(I2C_FlagStatus(I2C0, DIRECT, I2C_SB) == RESET);
	//Send the slave address
	I2C_AddressSend(I2C0, 0xc0, I2C_Mode7, I2C_TX);
	//Test the end of address transmission
	while(I2C_FlagStatus(I2C0, DIRECT, I2C_ENDAD) == RESET);
	I2C_FlagClear(I2C0, I2C_ENDAD);
	//Send Data to the slave
	SendResult = I2C_BufferSend(I2C0, pBuffer, 5);
	//Stop the communication
	I2C_STOPGenerate(I2C0, ENABLE);
	//Disable I2C0 and I2C1
	I2C_OnOffConfig(I2C0, DISABLE);
	I2C_OnOffConfig(I2C1, DISABLE);
}

/******************* (C) COPYRIGHT 2003 STMicroelectronics *****END OF FILE****/