Posted on May 17, 2011 at 09:57Hi all
I am not able to get clock on I2C clock out line
I have done following configuration
SCU_APBPeriphClockConfig(__I2C0,ENABLE);
SCU_APBPeriphClockConfig(__GPIO2, ENABLE);
SCU_APBPeriphReset(__I2C0, DISABLE);
SCU_APBPeriphReset(__GPIO2, DISABLE);
I2C_Cmd (I2C0, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 ;
//GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput;
//GPIO_InitStructure.GPIO_Direction = GPIO_PinInput;
//GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull;
GPIO_InitStructure.GPIO_Type = GPIO_Type_OpenCollector;
GPIO_InitStructure.GPIO_IPInputConnected = GPIO_IPInputConnected_Enable;
//GPIO_InitStructure.GPIO_IPInputConnected = GPIO_IPInputConnected_Disable;
GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt2;
GPIO_Init(GPIO2, &GPIO_InitStructure);
/* I2C0 Configuration */
//I2C_StructInit(&I2C_InitStructure);
I2C_InitStructure.I2C_GeneralCall = I2C_GeneralCall_Disable;
//I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_Ack = I2C_Ack_Disable;
I2C_InitStructure.I2C_CLKSpeed = 400000;
I2C_InitStructure.I2C_OwnAddress = 0xA0;
I2C_Init(I2C0, &I2C_InitStructure);
Uart0printf(''GO'');
I2C_GenerateStart (I2C0, ENABLE);
// Test on EV5 and clear it
while( ! I2C_CheckEvent(I2C0, I2C_EVENT_MASTER_MODE_SELECT) );
Uart0printf(''Start1 Generated'');
while(1)
{
//Uart0printf(''S'');
I2C_SendData (I2C0, 0xAF);
while (!I2C_GetFlagStatus (I2C0, I2C_FLAG_BUSY));
}
OUTPUT:
''GOStart1 Generated'' Displayed on UART.
Clock not received( Observed on CRO ) on I2C ClockOut when data byte is sent
Is there any mistake in code written by me,please let me know.
Regards
Sai
[ This message was edited by: sr_shinde on 05-03-2009 04:51 ]
