Hello TI,
I am working on I2C protocol for TI CC2538 with EEPROM ( OxA0). I have made I2C write function and I2C read function. I am not able to perform the I2C communication with EEPROM.
Kindly have a look at the below code and let me know what could be wrong.
//***************************************************************************/
#include <stdbool.h>
#include <stdint.h>
#include "hw_ints.h"
#include "hw_memmap.h"
#include "gpio.h"
#include "interrupt.h"
#include "ioc.h"
#include "hw_ioc.h"
#include "sys_ctrl.h"
#include "hw_i2cm.h"
#include "hw_i2cs.h"
#include "i2c.h"
#include "uartstdio.h"
#include "bsp.h"
#define EXAMPLE_PIN_UART_RXD GPIO_PIN_0
#define EXAMPLE_PIN_UART_TXD GPIO_PIN_1
#define EXAMPLE_GPIO_UART_BASE GPIO_A_BASE
#define EXAMPLE_PIN_I2C_SCL GPIO_PIN_3
#define EXAMPLE_PIN_I2C_SDA GPIO_PIN_4
#define EXAMPLE_GPIO_I2C_BASE GPIO_D_BASE
#define SLAVE_ADDRESS 0xA0
//uint8_t rtc_arr_val[]={ 0,0,0,
void
InitConsole(void)
{
//
// Map UART signals to the correct GPIO pins and configure them as
// hardware controlled.
//
IOCPinConfigPeriphOutput(EXAMPLE_GPIO_UART_BASE, EXAMPLE_PIN_UART_TXD,
IOC_MUX_OUT_SEL_UART0_TXD);
GPIOPinTypeUARTOutput(EXAMPLE_GPIO_UART_BASE, EXAMPLE_PIN_UART_TXD);
IOCPinConfigPeriphInput(EXAMPLE_GPIO_UART_BASE, EXAMPLE_PIN_UART_RXD,
IOC_UARTRXD_UART0);
GPIOPinTypeUARTInput(EXAMPLE_GPIO_UART_BASE, EXAMPLE_PIN_UART_RXD);
//
// Initialize the UART (UART0) for console I/O.
//
UARTStdioInit(0);
}
//*****************************************************************************
//
// Configure the I2C0 master and slave and connect them using loopback mode.
//
//*****************************************************************************
int
main(void)
{
SysCtrlClockSet(false, false, SYS_CTRL_SYSDIV_16MHZ); //! 1. The clock is set for system I2C block
SysCtrlIOClockSet(SYS_CTRL_SYSDIV_16MHZ); //! 1. The clock is set for I2C bus
bspLedInit();
//! 2. The GPIO is being set for I2C bus communication
SysCtrlPeripheralEnable(SYS_CTRL_PERIPH_I2C);
SysCtrlPeripheralReset(SYS_CTRL_PERIPH_I2C);
GPIOPinTypeI2C(EXAMPLE_GPIO_I2C_BASE, EXAMPLE_PIN_I2C_SCL);
GPIOPinTypeI2C(EXAMPLE_GPIO_I2C_BASE, EXAMPLE_PIN_I2C_SDA);
IOCPinConfigPeriphInput(EXAMPLE_GPIO_I2C_BASE, EXAMPLE_PIN_I2C_SCL,
IOC_I2CMSSCL);
IOCPinConfigPeriphInput(EXAMPLE_GPIO_I2C_BASE, EXAMPLE_PIN_I2C_SDA,
IOC_I2CMSSDA);
IOCPinConfigPeriphOutput(EXAMPLE_GPIO_I2C_BASE, EXAMPLE_PIN_I2C_SCL,
IOC_MUX_OUT_SEL_I2C_CMSSCL);
IOCPinConfigPeriphOutput(EXAMPLE_GPIO_I2C_BASE, EXAMPLE_PIN_I2C_SDA,
IOC_MUX_OUT_SEL_I2C_CMSSDA);
//! The UART is initailize
InitConsole();
UARTprintf("\n Tranferring from : Master -> Slave \n");
EERPROM_write();
EEPROM_read();
}
void EERPROM_write()
{
uint32_t RTC_Int_Flag,Seconds;
UARTprintf("------------- RTC TIME SET -------------- \n");
while(1){
I2CMasterInitExpClk(SysCtrlClockGet(), false); //! 4. Set the SCL clock frequency in I2CM_TPR
I2CMasterEnable(); //! 3. Enable the Master mode in I2C Module
I2CMasterSlaveAddrSet(SLAVE_ADDRESS, false); // 6. Write Slave address // Address written in I2CM_SA
I2CMasterDataPut(0); //! RTC Second address
I2CMasterControl(I2C_MASTER_CMD_BURST_SEND_START);
while(!(I2CMasterIntStatus(false)));
I2CMasterIntClear(); //! Clear Master interrupt source.
while(I2CMasterBusy()) //! 8. BUSY bit of the I2CM_STAT -- I2CM_STAT = 0x4E -> Error!
{
}
while(I2CMasterErr()) // ! 9. Check the ERROR bit in the I2CM_STAT
{
}
/**************************************************/
I2CMasterDataPut(0);
I2CMasterControl(I2C_MASTER_CMD_BURST_SEND_START);
while(!(I2CMasterIntStatus(false)));
I2CMasterIntClear(); //! Clear Master interrupt source.
while(I2CMasterBusy()) //! 8. BUSY bit of the I2CM_STAT -- I2CM_STAT = 0x4E -> Error!
{
}
while(I2CMasterErr()) // ! 9. Check the ERROR bit in the I2CM_STAT
{
}
/*************************************************/
I2CMasterDataPut(2);
I2CMasterControl(I2C_MASTER_CMD_BURST_SEND_START);
while(!(I2CMasterIntStatus(false)));
I2CMasterIntClear(); //! Clear Master interrupt source.
while(I2CMasterBusy()) //! 8. BUSY bit of the I2CM_STAT -- I2CM_STAT = 0x4E -> Error!
{
}
while(I2CMasterErr()) // ! 9. Check the ERROR bit in the I2CM_STAT
{
}
}}
uint32_t EEPROM_read()
{
uint32_t RTC_Int_Flag,Seconds;
UARTprintf("\n ------------- RTC TIME READ -------------- \n");
I2CMasterInitExpClk(SysCtrlClockGet(), false); //! 4. Set the SCL clock frequency in I2CM_TPR
I2CMasterEnable(); //! 3. Enable the Master mode in I2C Module
I2CMasterSlaveAddrSet(SLAVE_ADDRESS, false); // 6. Write Slave address // Address written in I2CM_SA
I2CMasterDataPut(0);
I2CMasterControl(I2C_MASTER_CMD_SINGLE_SEND);
while(!(I2CMasterIntStatus(false)));
I2CMasterIntClear(); //! Clear Master interrupt source.
while(I2CMasterBusy()) //! 8. BUSY bit of the I2CM_STAT -- I2CM_STAT = 0x4E -> Error!
{
}
while(I2CMasterErr()) // ! 9. Check the ERROR bit in the I2CM_STAT
{
}
I2CMasterSlaveAddrSet(SLAVE_ADDRESS, true);
I2CMasterControl(I2C_MASTER_CMD_SINGLE_RECEIVE);
while(!(I2CMasterIntStatus(false)));
I2CMasterIntClear(); //! Clear Master interrupt source.
while(I2CMasterBusy()) //! 8. BUSY bit of the I2CM_STAT -- I2CM_STAT = 0x4E -> Error!
{
}
while(I2CMasterErr()) // ! 9. Check the ERROR bit in the I2CM_STAT
{
}
RTC_Int_Flag=I2CMasterDataGet(); //! RTC Second address
UARTprintf("Recieved data : %d ",RTC_Int_Flag);
}
void callbackFunc()
{
while(!(I2CMasterIntStatus(false)));
I2CMasterIntClear(); //! Clear Master interrupt source.
}
