Hello Everyone ,
I am interfacing TM4C129XL Launchpad with DS1307 my code is working fine in updating hour,sec,date,year. When I update min, day and month separately it gets updated properly and works fine. But when I try to update these parameters all at a time, they get reset even if the power is ON.
I'm verifying the output on docklight. Attached is the code and the log file.
Can anyone tell me where I'm going wrong
code :
/*
* @PHYSICAL INTERFACE :
* 1) LED(PNO/PN1)
* 2) SWITCH(PN4)
* 3) UART
* a.UART0 (TX:PA1 RX:PA0 )
* b.UART1 (TX:PB1 RX:PB0/PQ4)
* C.UART6 (TX:PP1 RX:PP0)
* 4) RTC (I2C : PB2,PB3 )
*
*
*
*
* */
//#include <stdint.h>
//#include <stdbool.h>
//#include "inc/hw_memmap.h"
//#include "inc/hw_types.h"
//#include "driverlib/gpio.h"
//#include "driverlib/pin_map.h"
//#include "driverlib/sysctl.h"
//#include "driverlib/uart.h"
//to work with interrupts we will use :
//#include "inc/hw_ints.h"
//#include "driverlib/interrupt.h"
//#include "driverlib/i2c.h"
//
//#include "utils/uartstdio.h"
//include files
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include "inc/hw_i2c.h"
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "inc/hw_gpio.h"
#include "driverlib/i2c.h"
#include "driverlib/sysctl.h"
#include "driverlib/gpio.h"
#include "driverlib/pin_map.h"
#include "driverlib/uart.h"
//#include "uartstdio.h"
#include "utils/uartstdio.h"
//Defines for DS1307
#define SLAVE_ADDRESS 0x68
#define SEC 0x00
#define MIN 0x01
#define HRS 0x02
#define DAY 0x03
#define DATE 0x04
#define MONTH 0x05
#define YEAR 0x06
#define CNTRL 0x07
uint32_t g_ui32SysClock;
unsigned char sec,min,hour,day,date,month,year,control;
//initialize I2C module 0
//Slightly modified version of TI's example code
void InitI2C0(void)
{
SysCtlPeripheralReset(SYSCTL_PERIPH_I2C0);
//enable I2C module 0
SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C0);
//reset module
SysCtlPeripheralReset(SYSCTL_PERIPH_I2C0);
//enable GPIO peripheral that contains I2C 0
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
// Configure the pin muxing for I2C0 functions on port B2 and B3.
GPIOPinConfigure(GPIO_PB2_I2C0SCL);
GPIOPinConfigure(GPIO_PB3_I2C0SDA);
// Select the I2C function for these pins.
GPIOPinTypeI2CSCL(GPIO_PORTB_BASE, GPIO_PIN_2);
GPIOPinTypeI2C(GPIO_PORTB_BASE, GPIO_PIN_3);
// Enable and initialize the I2C0 master module. Use the system clock for
// the I2C0 module. The last parameter sets the I2C data transfer rate.
// If false the data rate is set to 100kbps and if true the data rate will
// be set to 400kbps.
I2CMasterInitExpClk(I2C0_BASE, g_ui32SysClock, false);
}
//sends an I2C command to the specified slave
void I2CSend(uint8_t slave_addr, uint32_t num_of_args, ...)
{
// Tell the master module what address it will place on the bus when
// communicating with the slave.
I2CMasterSlaveAddrSet(I2C0_BASE, slave_addr, false);
//stores list of variable number of arguments
va_list vargs;
//specifies the va_list to "open" and the last fixed argument
//so vargs knows where to start looking
va_start(vargs, num_of_args);
//put data to be sent into FIFO
I2CMasterDataPut(I2C0_BASE, va_arg(vargs, uint32_t));
//if there is only one argument, we only need to use the
//single send I2C function
if(num_of_args == 1)
{
//Initiate send of data from the MCU
I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_SINGLE_SEND);
// Wait until MCU is done transferring.
SysCtlDelay(800);
while(I2CMasterBusy(I2C0_BASE));
//"close" variable argument list
va_end(vargs);
}
//otherwise, we start transmission of multiple bytes on the
//I2C bus
else
{
//Initiate send of data from the MCU
I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_BURST_SEND_START);
// Wait until MCU is done transferring.
SysCtlDelay(800);
while(I2CMasterBusy(I2C0_BASE));
//send num_of_args-2 pieces of data, using the
//BURST_SEND_CONT command of the I2C module
unsigned char i;
for(i = 1; i < (num_of_args); i++)
{
//put next piece of data into I2C FIFO
I2CMasterDataPut(I2C0_BASE, va_arg(vargs, uint32_t));
//send next data that was just placed into FIFO
I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_BURST_SEND_CONT);
// Wait until MCU is done transferring.
SysCtlDelay(800);
while(I2CMasterBusy(I2C0_BASE));
}
//put last piece of data into I2C FIFO
I2CMasterDataPut(I2C0_BASE, va_arg(vargs, uint32_t));
//send next data that was just placed into FIFO
I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_BURST_SEND_FINISH);
// Wait until MCU is done transferring.
SysCtlDelay(800);
while(I2CMasterBusy(I2C0_BASE));
//"close" variable args list
va_end(vargs);
}
}
//read specified register on slave device
uint32_t I2CReceive(uint32_t slave_addr, uint8_t reg)
{
//specify that we are writing (a register address) to the
//slave device
I2CMasterSlaveAddrSet(I2C0_BASE, slave_addr, false);
//specify register to be read
I2CMasterDataPut(I2C0_BASE, reg);
//send control byte and register address byte to slave device
I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_BURST_SEND_START);
//wait for MCU to finish transaction
SysCtlDelay(800);
while(I2CMasterBusy(I2C0_BASE));
//specify that we are going to read from slave device
I2CMasterSlaveAddrSet(I2C0_BASE, slave_addr, true);
I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_BURST_RECEIVE_START);
//specify that we are going to read from slave device
//wait for MCU to finish transaction
SysCtlDelay(800);
while(I2CMasterBusy(I2C0_BASE));
//send next data that was just placed into FIFO
I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_BURST_RECEIVE_CONT);
//specify that we are going to read from slave device
// Wait until MCU is done transferring.
SysCtlDelay(800);
while(I2CMasterBusy(I2C0_BASE));
I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_BURST_RECEIVE_FINISH);
//specify that we are going to read from slave device
//wait for MCU to finish transaction
SysCtlDelay(800);
while(I2CMasterBusy(I2C0_BASE));
//return data pulled from the specified register
return I2CMasterDataGet(I2C0_BASE);
}
//convert dec to bcd
unsigned char dec2bcd(unsigned char val)
{
return (((val / 10) << 4) | (val % 10));
}
// convert BCD to binary
unsigned char bcd2dec(unsigned char val)
{
return (((val & 0xF0) >> 4) * 10) + (val & 0x0F);
}
//Set Time
/*void SetTimeDate(unsigned char sec, unsigned char min, unsigned char hour, unsigned char day, unsigned char date, unsigned char month,unsigned char year)
{
I2CSend(SLAVE_ADDRESS,8,SEC,dec2bcd(sec),dec2bcd(min),dec2bcd(hour),dec2bcd(day),dec2bcd(date),dec2bcd(month),dec2bcd(year));
}*/
void SetHour(unsigned char hh)
{
unsigned char h=0;
h=dec2bcd(hh);
I2CSend(SLAVE_ADDRESS,2,HRS,h);
}
void SetMinute(unsigned char mm)
{
unsigned char m =0;
m=dec2bcd(mm);
I2CSend(SLAVE_ADDRESS,2,MIN,m);
}
void SetSec(unsigned char ss)
{
unsigned char s =0;
s=dec2bcd(ss);
I2CSend(SLAVE_ADDRESS,2,SEC,s);
}
void SetDay(unsigned char day)
{
unsigned char d;
d=dec2bcd(day);
I2CSend(SLAVE_ADDRESS,2,DAY,d);
}
void SetDate(unsigned char date)
{
unsigned char d;
d=dec2bcd(date);
I2CSend(SLAVE_ADDRESS,2,DATE,d);
}
void SetMonth(unsigned char month)
{
unsigned char m;
m=dec2bcd(month);
I2CSend(SLAVE_ADDRESS,2,MONTH,m);
}
void SetYear(unsigned char year)
{
unsigned char y;
y=dec2bcd(year);
I2CSend(SLAVE_ADDRESS,2,YEAR,y);
}
void SetControl(unsigned char control)
{
I2CSend(SLAVE_ADDRESS,2,CNTRL,dec2bcd(control));
}
//Get Time and Date
unsigned char GetClock(unsigned char reg)
{
unsigned char clockData = I2CReceive(SLAVE_ADDRESS,reg);
return bcd2dec(clockData);
//return clockData;
}
void ConfigureUART(void)
{
// Enable the GPIO Peripheral used by the UART.
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
// Enable UART0.
SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
// Configure GPIO Pins for UART mode.
GPIOPinConfigure(GPIO_PA0_U0RX);
GPIOPinConfigure(GPIO_PA1_U0TX);
GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
// Initialize the UART for console I/O.
UARTStdioConfig(0, 115200, g_ui32SysClock);
//UARTConfigSetExpClk(UART0_BASE, g_ui32SysClock, 115200,(UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |UART_CONFIG_PAR_NONE));
}
void main(void)
{
// Set the clocking to run directly from the external crystal/oscillator.
g_ui32SysClock = SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |SYSCTL_OSC_MAIN|SYSCTL_USE_PLL|SYSCTL_CFG_VCO_480), 120000000);
//initialize I2C module 0
InitI2C0();
ConfigureUART();
//SetTimeDate(36,55,10,4,27,10,16);
SetSec(00);
SetMinute(41);
SetHour(11);
SetDay(2);
SetDate(21);
SetMonth(6);
SetYear(22);
SetControl(0x13);
while(1)
{
sec = GetClock(SEC);
min = GetClock(MIN);
hour = GetClock(HRS);
day = GetClock(DAY);
date = GetClock(DATE);
month = GetClock(MONTH);
year = GetClock(YEAR);
control = GetClock(CNTRL);
UARTprintf("%02d:%02d:%02d\r\n%02d %02d/%0d/%02d\r\n \n%02d\r\n",hour,min,sec,day,date,month,year,control);
//UARTprintf("hh:mm:ss: %02d:%02d:%02d \r\n",hour,min,sec);
//UARTprintf("%02d \r\n",control);
SysCtlDelay(g_ui32SysClock);
}
}
Log file:
//************** log file
11:21:09
22 21/0/22
00
11:21:12
22 21/0/22
00
11:21:15
22 21/0/22
00
11:21:18
22 21/0/22
00
11:21:21
22 21/0/22
00
Regards,
Sagar Kanjariya
