rtc_lcd code update

Resources/Source_code/Workspace/stm32f4xx_drivers/bsp/ds1307.c

@@ -0,0 +1,199 @@
+
+#include<stdint.h>
+#include<string.h>
+
+#include "ds1307.h"
+
+
+static void ds1307_i2c_pin_config(void);
+static void ds1307_i2c_config(void);
+static uint8_t ds1307_read(uint8_t reg_addr);
+static void ds1307_write(uint8_t value,uint8_t reg_addr);
+static uint8_t bcd_to_binary(uint8_t value);
+static uint8_t binary_to_bcd(uint8_t value);
+
+I2C_Handle_t g_ds1307I2cHandle;
+
+//returns 1 : CH = 1 ; init failed
+//returns 0 : CH = 0 ; init success
+uint8_t ds1307_init(void)
+{
+
+	//1. init the i2c pins
+	ds1307_i2c_pin_config();
+
+	//2. initialize the i2c peripheral
+	ds1307_i2c_config();
+
+	//3. Enable the I2C peripheral
+	I2C_PeripheralControl(DS1307_I2C, ENABLE);
+
+	//4. Make clock halt = 0;
+	ds1307_write(0x00,DS1307_ADDR_SEC);
+
+	//5. Read back clock halt bit
+	uint8_t clock_state = ds1307_read(DS1307_ADDR_SEC);
+
+	return ((clock_state >> 7 ) & 0x1);
+
+}
+
+
+void ds1307_set_current_time(RTC_time_t *rtc_time)
+{
+	uint8_t seconds, hrs;
+	seconds = binary_to_bcd(rtc_time->seconds);
+	seconds &= ~( 1 << 7);
+	ds1307_write(seconds, DS1307_ADDR_SEC);
+
+	ds1307_write(binary_to_bcd(rtc_time->minutes), DS1307_ADDR_MIN);
+
+	hrs = binary_to_bcd(rtc_time->hours);
+
+	if(rtc_time->time_format == TIME_FORMAT_24HRS){
+		hrs &= ~(1 << 6);
+	}else{
+		hrs |= (1 << 6);
+		hrs = (rtc_time->time_format  == TIME_FORMAT_12HRS_PM) ? hrs | ( 1 << 5) :  hrs & ~( 1 << 5) ;
+	}
+
+	ds1307_write(hrs,DS1307_ADDR_HRS);
+
+}
+
+void ds1307_set_current_date(RTC_date_t *rtc_date)
+{
+	ds1307_write(binary_to_bcd(rtc_date->date),DS1307_ADDR_DATE);
+
+	ds1307_write(binary_to_bcd(rtc_date->month),DS1307_ADDR_MONTH);
+
+	ds1307_write(binary_to_bcd(rtc_date->year),DS1307_ADDR_YEAR);
+
+	ds1307_write(binary_to_bcd(rtc_date->day),DS1307_ADDR_DAY);
+
+}
+
+void ds1307_get_current_time(RTC_time_t *rtc_time)
+{
+
+	uint8_t seconds,hrs;
+
+	seconds = ds1307_read(DS1307_ADDR_SEC);
+
+	seconds &= ~( 1 << 7);
+
+	rtc_time->seconds = bcd_to_binary(seconds);
+	rtc_time->minutes = bcd_to_binary(ds1307_read(DS1307_ADDR_MIN));
+
+	hrs = ds1307_read(DS1307_ADDR_HRS);
+	if(hrs & ( 1 << 6)){
+		//12 hr format
+		rtc_time->time_format =  !((hrs & ( 1 << 5)) == 0) ;
+		hrs &= ~(0x3 << 5);//Clear 6 and 5
+	}else{
+		//24 hr format
+		rtc_time->time_format = TIME_FORMAT_24HRS;
+	}
+
+	rtc_time->hours = bcd_to_binary(hrs);
+}
+
+void ds1307_get_current_date(RTC_date_t *rtc_date)
+{
+	rtc_date->day =  bcd_to_binary(ds1307_read(DS1307_ADDR_DAY));
+	rtc_date->date = bcd_to_binary(ds1307_read(DS1307_ADDR_DATE));
+	rtc_date->month = bcd_to_binary(ds1307_read(DS1307_ADDR_MONTH));
+	rtc_date->year = bcd_to_binary(ds1307_read(DS1307_ADDR_YEAR));
+
+}
+
+static void ds1307_i2c_pin_config(void)
+{
+	GPIO_Handle_t i2c_sda,i2c_scl;
+
+	memset(&i2c_sda,0,sizeof(i2c_sda));
+	memset(&i2c_scl,0,sizeof(i2c_scl));
+
+	/*
+	 * I2C1_SCL ==> PB6
+	 * I2C1_SDA ==> PB7
+	 */
+
+	i2c_sda.pGPIOx = DS1307_I2C_GPIO_PORT;
+	i2c_sda.GPIO_PinConfig.GPIO_PinAltFunMode = 4;
+	i2c_sda.GPIO_PinConfig.GPIO_PinMode = GPIO_MODE_ALTFN;
+	i2c_sda.GPIO_PinConfig.GPIO_PinNumber = DS1307_I2C_SDA_PIN;
+	i2c_sda.GPIO_PinConfig.GPIO_PinOPType = GPIO_OP_TYPE_OD;
+	i2c_sda.GPIO_PinConfig.GPIO_PinPuPdControl = DS1307_I2C_PUPD;
+	i2c_sda.GPIO_PinConfig.GPIO_PinSpeed = GPIO_SPEED_FAST;
+
+	GPIO_Init(&i2c_sda);
+
+
+	i2c_scl.pGPIOx = DS1307_I2C_GPIO_PORT;
+	i2c_scl.GPIO_PinConfig.GPIO_PinAltFunMode = 4;
+	i2c_scl.GPIO_PinConfig.GPIO_PinMode = GPIO_MODE_ALTFN;
+	i2c_scl.GPIO_PinConfig.GPIO_PinNumber = DS1307_I2C_SCL_PIN;
+	i2c_scl.GPIO_PinConfig.GPIO_PinOPType = GPIO_OP_TYPE_OD;
+	i2c_scl.GPIO_PinConfig.GPIO_PinPuPdControl = DS1307_I2C_PUPD;
+	i2c_scl.GPIO_PinConfig.GPIO_PinSpeed = GPIO_SPEED_FAST;
+
+	GPIO_Init(&i2c_scl);
+
+}
+
+
+static void ds1307_i2c_config(void)
+{
+	g_ds1307I2cHandle.pI2Cx = DS1307_I2C;
+	g_ds1307I2cHandle.I2C_Config.I2C_AckControl = I2C_ACK_ENABLE;
+	g_ds1307I2cHandle.I2C_Config.I2C_SCLSpeed = DS1307_I2C_SPEED;
+	I2C_Init(&g_ds1307I2cHandle);
+}
+
+
+static void ds1307_write(uint8_t value,uint8_t reg_addr)
+{
+	uint8_t tx[2];
+	tx[0] = reg_addr;
+	tx[1] = value;
+	I2C_MasterSendData(&g_ds1307I2cHandle, tx, 2, DS1307_I2C_ADDRESS, 0);
+}
+
+
+
+static uint8_t ds1307_read(uint8_t reg_addr)
+{
+	uint8_t data;
+    I2C_MasterSendData(&g_ds1307I2cHandle, &reg_addr, 1, DS1307_I2C_ADDRESS, 0);
+    I2C_MasterReceiveData(&g_ds1307I2cHandle, &data, 1, DS1307_I2C_ADDRESS, 0);
+
+    return data;
+}
+
+
+
+static uint8_t binary_to_bcd(uint8_t value)
+{
+	uint8_t m , n;
+	uint8_t bcd;
+
+	bcd = value;
+	if(value >= 10)
+	{
+		m = value /10;
+		n = value % 10;
+		bcd = (m << 4) | n ;
+	}
+
+	return bcd;
+}
+
+static uint8_t bcd_to_binary(uint8_t value)
+{
+	uint8_t m , n;
+	m = (uint8_t) ((value >> 4 ) * 10);
+	n =  value & (uint8_t)0x0F;
+	return (m+n);
+}
+

Resources/Source_code/Workspace/stm32f4xx_drivers/bsp/ds1307.h

@@ -0,0 +1,71 @@
+
+
+#ifndef DS1307_H_
+#define DS1307_H_
+
+#include "stm32f407xx.h"
+
+/*Application configurable items */
+#define DS1307_I2C  			I2C1
+#define DS1307_I2C_GPIO_PORT    GPIOB
+#define DS1307_I2C_SDA_PIN 		GPIO_PIN_NO_7
+#define DS1307_I2C_SCL_PIN 		GPIO_PIN_NO_6
+#define DS1307_I2C_SPEED 		I2C_SCL_SPEED_SM
+#define DS1307_I2C_PUPD			GPIO_PIN_PU
+
+/*Register addresses */
+#define DS1307_ADDR_SEC 		0x00
+#define DS1307_ADDR_MIN 		0x01
+#define DS1307_ADDR_HRS			0x02
+#define DS1307_ADDR_DAY			0x03
+#define DS1307_ADDR_DATE		0x04
+#define DS1307_ADDR_MONTH		0x05
+#define DS1307_ADDR_YEAR		0x06
+
+
+#define TIME_FORMAT_12HRS_AM 	0
+#define TIME_FORMAT_12HRS_PM 	1
+#define TIME_FORMAT_24HRS 		2
+
+#define DS1307_I2C_ADDRESS      0x68
+
+
+#define SUNDAY  	1;
+#define MONDAY  	2;
+#define TUESDAY  	3;
+#define WEDNESDAY   4;
+#define THURSDAY  	5;
+#define FRIDAY  	6;
+#define SATURDAY  	7;
+
+
+typedef struct
+{
+	uint8_t date;
+	uint8_t month;
+	uint8_t year;
+	uint8_t day;
+}RTC_date_t;
+
+
+typedef struct
+{
+	uint8_t seconds;
+	uint8_t minutes;
+	uint8_t hours;
+	uint8_t time_format;
+}RTC_time_t;
+
+
+
+//Function prototypes
+
+uint8_t ds1307_init(void);
+
+void ds1307_set_current_time(RTC_time_t *);
+void ds1307_get_current_time(RTC_time_t *);
+
+void ds1307_set_current_date(RTC_date_t *);
+void ds1307_get_current_date(RTC_date_t *);
+
+#endif /* DS1307_H_ */