Hello,
I want to interface ds1307 external rtc with tiva-c tm4c123gh6pm.i have send my code,but in the ccs it show me master is alway in busy state,i don't understand the problem with it.What can i do?
I have use 1k external pull up resister with both data and clk line.
3201.rtc.txt
#include "utils/ustdlib.h"
#include "inc/hw_i2c.h"
#include "driverlib/i2c.h"
#include <string.h>
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/fpu.h"
#include "driverlib/gpio.h"
#include "driverlib/interrupt.h"
#include "driverlib/rom.h"
#include "driverlib/sysctl.h"
#include "driverlib/systick.h"
#include "grlib/grlib.h"
#include "utils/cmdline.h"
//#include "utils/uartstdio.h"
#include "fatfs/src/ff.h"
#include "fatfs/src/diskio.h"
#include "drivers/cfal96x64x16.h"
#include "driverlib/timer.h"
#include "driverlib/debug.h"
#include "driverlib/adc.h"
#include "driverlib/pin_map.h"
#include "driverlib/uart.h"
#define BYTE unsigned char
#define SLAVE_ADDRESS 0x68
extern void InitConsole(void);
extern unsigned char dec2bcd(unsigned char val) ;
extern unsigned char bcd2dec(unsigned char val) ;
unsigned long tsec,tmin,thour,tday,tdate,tmonth,tyear;
unsigned char dec2bcd(unsigned char val)
{
return ((val/0xA*0x10)+(val%0xA));
}
// convert BCD to binary
unsigned char bcd2dec(unsigned char val)
{
return ((val/0x10*0xA)+(val%0x10));
}
void InitConsole(void)
{
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
//GPIOPinConfigure(GPIO_PA0_U0RX);
//GPIOPinConfigure(GPIO_PA1_U0TX);
// GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
// UARTStdioInit(0);
}
int main()
{
unsigned long sec=3,min =10,hour = 5,day = 4,date = 17,month = 4,year = 14;
unsigned char Last_Value = 1;
SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN | SYSCTL_XTAL_8MHZ);
InitConsole();
SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C0);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
SysTickPeriodSet(SysCtlClockGet());
SysTickEnable();
GPIOPinConfigure(GPIO_PB2_I2C0SCL);
GPIOPinConfigure(GPIO_PB3_I2C0SDA);
GPIOPinTypeI2C(GPIO_PORTB_BASE, GPIO_PIN_2 | GPIO_PIN_3);
I2CMasterInitExpClk(I2C0_MASTER_BASE, SysCtlClockGet(), false);
I2CMasterSlaveAddrSet(I2C0_MASTER_BASE, SLAVE_ADDRESS , false);
I2CMasterDataPut(I2C0_MASTER_BASE, 0);
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_SINGLE_SEND);
while(I2CMasterBusy(I2C0_MASTER_BASE));
I2CMasterDataPut(I2C0_MASTER_BASE, dec2bcd(sec));
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_SEND_CONT);
while(I2CMasterBusy(I2C0_MASTER_BASE));
I2CMasterDataPut(I2C0_MASTER_BASE, dec2bcd(min));
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_SEND_CONT);
while(I2CMasterBusy(I2C0_MASTER_BASE));
I2CMasterDataPut(I2C0_MASTER_BASE, dec2bcd(hour));
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_SEND_CONT);
while(I2CMasterBusy(I2C0_MASTER_BASE));
I2CMasterDataPut(I2C0_MASTER_BASE, dec2bcd(day));
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_SEND_CONT);
while(I2CMasterBusy(I2C0_MASTER_BASE));
I2CMasterDataPut(I2C0_MASTER_BASE, dec2bcd(date));
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_SEND_CONT);
while(I2CMasterBusy(I2C0_MASTER_BASE));
I2CMasterDataPut(I2C0_MASTER_BASE, dec2bcd(month));
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_SEND_CONT);
while(I2CMasterBusy(I2C0_MASTER_BASE));
I2CMasterDataPut(I2C0_MASTER_BASE, dec2bcd(year));
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_SEND_FINISH);
while(I2CMasterBusy(I2C0_MASTER_BASE));
while(1)
{
I2CMasterSlaveAddrSet(I2C0_MASTER_BASE, SLAVE_ADDRESS , false);
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_SEND_START);
I2CMasterDataPut(I2C0_MASTER_BASE, 0x00);
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_SEND_FINISH);
while(I2CMasterBusy(I2C0_MASTER_BASE));
I2CMasterSlaveAddrSet(I2C0_MASTER_BASE, SLAVE_ADDRESS , true);
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_RECEIVE_START);
while(I2CMasterBusy(I2C0_MASTER_BASE));
sec = I2CMasterDataGet(I2C0_MASTER_BASE);
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_RECEIVE_CONT);
while(I2CMasterBusy(I2C0_MASTER_BASE));
min = I2CMasterDataGet(I2C0_MASTER_BASE);
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_RECEIVE_CONT);
while(I2CMasterBusy(I2C0_MASTER_BASE));
hour = I2CMasterDataGet(I2C0_MASTER_BASE);
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_RECEIVE_CONT);
while(I2CMasterBusy(I2C0_MASTER_BASE));
day = I2CMasterDataGet(I2C0_MASTER_BASE);
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_RECEIVE_CONT);
while(I2CMasterBusy(I2C0_MASTER_BASE));
date = I2CMasterDataGet(I2C0_MASTER_BASE);
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_RECEIVE_CONT);
while(I2CMasterBusy(I2C0_MASTER_BASE));
month = I2CMasterDataGet(I2C0_MASTER_BASE);
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_RECEIVE_CONT);
while(I2CMasterBusy(I2C0_MASTER_BASE));
year = I2CMasterDataGet(I2C0_MASTER_BASE);
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_RECEIVE_FINISH);
while(I2CMasterBusy(I2C0_MASTER_BASE));
tsec = bcd2dec(sec)&0x7f;
tmin = bcd2dec(min);
thour = bcd2dec(hour)&0x3f;
tday = bcd2dec(day);
tdate = bcd2dec(date);
tmonth = bcd2dec(month);
tyear = bcd2dec(year);
}
}
-darshan