Posted on December 27, 2007 at 09:49Hello,
I'm encountering problems with I2C Slave operation. Can anyone tell me what the problem is? What am I missing? Any help is appreciated. IHere is my code:
I'm also attaching the whole code.
// I2C Configuration
void I2C_Configuration(void)
{
I2C_InitTypeDef I2C_InitStructure;
/* I2C configuration */
I2C_InitStructure.I2C_GeneralCall = I2C_GeneralCall_Disable;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_CLKSpeed = 100000;
I2C_InitStructure.I2C_OwnAddress = 0x02;
/* I2C Peripheral Enable */
I2C_Cmd (ENABLE);
I2C_ITConfig(ENABLE); // yeni
/* Apply I2C configuration after enabling it */
I2C_Init(&I2C_InitStructure);
}
// EIC Configuration
void EIC_Configuration(void)
{
EIC_IRQInitTypeDef EIC_IRQInitStructure;
/* Configure and enable I2C_IRQChannel */
EIC_IRQInitStructure.EIC_IRQChannel = I2C_IRQChannel;
EIC_IRQInitStructure.EIC_IRQChannelPriority = 1;
EIC_IRQInitStructure.EIC_IRQChannelCmd= ENABLE;
EIC_IRQInit(&EIC_IRQInitStructure);
/* Configure and enable RTC_IRQChannel */
EIC_IRQInitStructure.EIC_IRQChannel = RTC_IRQChannel;
EIC_IRQInitStructure.EIC_IRQChannelPriority = 2;
EIC_IRQInitStructure.EIC_IRQChannelCmd= ENABLE;
EIC_IRQInit(&EIC_IRQInitStructure);
/* ADC IRQ Channel configuration */
EIC_IRQInitStructure.EIC_IRQChannel = ADC_IRQChannel;
EIC_IRQInitStructure.EIC_IRQChannelPriority = 3;
EIC_IRQInitStructure.EIC_IRQChannelCmd = ENABLE;
EIC_IRQInit(&EIC_IRQInitStructure);
/* Enable the interrupt controller */
EIC_IRQCmd(ENABLE);
}
// GPIO Configuration
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* SCL and SDA I2C pins configuration */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 ;
GPIO_Init(GPIO0, &GPIO_InitStructure);
//...
}
// MRCC Configuration
void MRCC_Configuration(void)
{
/* MRCC system reset(for debug purpose) */
MRCC_DeInit();
/* Wait for OSC4M start-up */
OSC4MStartUpStatus = MRCC_WaitForOSC4MStartUp();
if(OSC4MStartUpStatus == SUCCESS)
{
/* Set HCLK to 30MHz */
MRCC_HCLKConfig(MRCC_CKSYS_Div2);
/* Set CKTIM to 30MHz */
MRCC_CKTIMConfig(MRCC_HCLK_Div1);
/* Set PCLK to 30MHz */
MRCC_PCLKConfig(MRCC_CKTIM_Div1);
/* Set CK_SYS to 60 MHz */
MRCC_CKSYSConfig(MRCC_CKSYS_OSC4MPLL, MRCC_PLL_Mul_15);
}
/* GPIO pins optimized for 3V3 operation */
MRCC_IOVoltageRangeConfig(MRCC_IOVoltageRange_3V3);
/* Enable GPIO and UART0 clock */
MRCC_PeripheralClockConfig(MRCC_Peripheral_I2C | MRCC_Peripheral_ADC | MRCC_Peripheral_GPIO | MRCC_Peripheral_UART0, ENABLE);
// Here is the interrupt ruotine:
void I2C_IRQHandler(void)
{
switch (I2C_GetLastEvent())
{
case I2C_EVENT_SLAVE_ADDRESS_MATCHED: // EV1
Rx_Idx = Tx_Idx = 0;
break;
case I2C_EVENT_SLAVE_BYTE_RECEIVED: // EV2
I2C0_Buffer_Rx[Rx_Idx++] = I2C_ReceiveData();
break;
case I2C_EVENT_SLAVE_BYTE_TRANSMITTED: // EV3
I2C_SendData(I2C0_Buffer_Tx[Tx_Idx++]);
break;
case I2C_EVENT_SLAVE_ACK_FAILURE: // EV3-1
I2C_SendData(0xFF);
break;
case I2C_EVENT_SLAVE_STOP_DETECTED: // EV4
Rx_Idx = Tx_Idx = 0;
break;
default:
break;
}
}
[ This message was edited by: ucoskun on 02-01-2008 19:56 ]
