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I2C driver

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This commit is contained in:
Emanuele Trabattoni
2025-06-21 16:34:11 +02:00
parent 2a33316ba8
commit 83a63c1241
6 changed files with 100 additions and 41 deletions
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189
lib/RTC/WS_PCF85063.cpp Normal file
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#include "WS_PCF85063.h"
datetime_t datetime= {0};
datetime_t Update_datetime= {0};
static uint8_t decToBcd(int val);
static int bcdToDec(uint8_t val);
void Time_printf(void *parameter) {
while(1){
char datetime_str[50];
datetime_to_str(datetime_str,datetime);
printf("Time:%s\r\n",datetime_str);
vTaskDelay(pdMS_TO_TICKS(500));
}
vTaskDelete(NULL);
}
void PCF85063_Init(void) // PCF85063 initialized
{
uint8_t Value = RTC_CTRL_1_DEFAULT|RTC_CTRL_1_CAP_SEL;
I2C_Write(PCF85063_ADDRESS, RTC_CTRL_1_ADDR, &Value, 1);
I2C_Read(PCF85063_ADDRESS, RTC_CTRL_1_ADDR, &Value, 1);
if(Value & RTC_CTRL_1_STOP)
printf("PCF85063 failed to be initialized.state :%d\r\n",Value);
else
printf("PCF85063 is running,state :%d\r\n",Value);
//
// Update_datetime.year = 2024;
// Update_datetime.month = 9;
// Update_datetime.day = 20;
// Update_datetime.dotw = 5;
// Update_datetime.hour = 9;
// Update_datetime.minute = 50;
// Update_datetime.second = 0;
// PCF85063_Set_All(Update_datetime);
xTaskCreatePinnedToCore(
PCF85063Task,
"PCF85063Task",
4096,
NULL,
3,
NULL,
0
);
// xTaskCreatePinnedToCore(
// Time_printf,
// "Time_printf",
// 4096,
// NULL,
// 3,
// NULL,
// 0
// );
}
void PCF85063Task(void *parameter) {
while(1){
PCF85063_Read_Time(&datetime);
vTaskDelay(pdMS_TO_TICKS(100));
}
vTaskDelete(NULL);
}
void PCF85063_Reset() // Reset PCF85063
{
uint8_t Value = RTC_CTRL_1_DEFAULT|RTC_CTRL_1_CAP_SEL|RTC_CTRL_1_SR;
esp_err_t ret = I2C_Write(PCF85063_ADDRESS, RTC_CTRL_1_ADDR, &Value, 1);
if(ret != ESP_OK)
printf("PCF85063 : Reset failure\r\n");
}
void PCF85063_Set_Time(datetime_t time) // Set Time
{
uint8_t buf[3] = {decToBcd(time.second),
decToBcd(time.minute),
decToBcd(time.hour)};
esp_err_t ret = I2C_Write(PCF85063_ADDRESS, RTC_SECOND_ADDR, buf, sizeof(buf));
if(ret != ESP_OK)
printf("PCF85063 : Time setting failure\r\n");
}
void PCF85063_Set_Date(datetime_t date) // Set Date
{
uint8_t buf[4] = {decToBcd(date.day),
decToBcd(date.dotw),
decToBcd(date.month),
decToBcd(date.year - YEAR_OFFSET)};
esp_err_t ret = I2C_Write(PCF85063_ADDRESS, RTC_DAY_ADDR, buf, sizeof(buf));
if(ret != ESP_OK)
printf("PCF85063 : Date setting failed\r\n");
}
void PCF85063_Set_All(datetime_t time) // Set Time And Date
{
uint8_t buf[7] = {decToBcd(time.second),
decToBcd(time.minute),
decToBcd(time.hour),
decToBcd(time.day),
decToBcd(time.dotw),
decToBcd(time.month),
decToBcd(time.year - YEAR_OFFSET)};
esp_err_t ret = I2C_Write(PCF85063_ADDRESS, RTC_SECOND_ADDR, buf, sizeof(buf));
if(ret != ESP_OK)
printf("PCF85063 : Failed to set the date and time\r\n");
}
void PCF85063_Read_Time(datetime_t *time) // Read Time And Date
{
uint8_t buf[7] = {0};
esp_err_t ret = I2C_Read(PCF85063_ADDRESS, RTC_SECOND_ADDR, buf, sizeof(buf));
if(ret != ESP_OK)
printf("PCF85063 : Time read failure\r\n");
else{
time->second = bcdToDec(buf[0] & 0x7F);
time->minute = bcdToDec(buf[1] & 0x7F);
time->hour = bcdToDec(buf[2] & 0x3F);
time->day = bcdToDec(buf[3] & 0x3F);
time->dotw = bcdToDec(buf[4] & 0x07);
time->month = bcdToDec(buf[5] & 0x1F);
time->year = bcdToDec(buf[6]) + YEAR_OFFSET;
}
}
void PCF85063_Enable_Alarm() // Enable Alarm and Clear Alarm flag
{
uint8_t Value = RTC_CTRL_2_DEFAULT | RTC_CTRL_2_AIE;
Value &= ~RTC_CTRL_2_AF;
esp_err_t ret = I2C_Write(PCF85063_ADDRESS, RTC_CTRL_2_ADDR, &Value, 1);
if(ret != ESP_OK)
printf("PCF85063 : Failed to enable Alarm Flag and Clear Alarm Flag \r\n");
}
uint8_t PCF85063_Get_Alarm_Flag() // Get Alarm flag
{
uint8_t Value = 0;
esp_err_t ret = I2C_Read(PCF85063_ADDRESS, RTC_CTRL_2_ADDR, &Value, 1);
if(ret != ESP_OK)
printf("PCF85063 : Failed to obtain a warning flag.\r\n");
else
Value &= RTC_CTRL_2_AF | RTC_CTRL_2_AIE;
//printf("Value = 0x%x",Value);
return Value;
}
void PCF85063_Set_Alarm(datetime_t time) // Set Alarm
{
uint8_t buf[5] ={
decToBcd(time.second)&(~RTC_ALARM),
decToBcd(time.minute)&(~RTC_ALARM),
decToBcd(time.hour)&(~RTC_ALARM),
//decToBcd(time.day)&(~RTC_ALARM),
//decToBcd(time.dotw)&(~RTC_ALARM)
RTC_ALARM, //disalbe day
RTC_ALARM //disalbe weekday
};
esp_err_t ret = I2C_Write(PCF85063_ADDRESS, RTC_SECOND_ALARM, buf, sizeof(buf));
if(ret != ESP_OK)
printf("PCF85063 : Failed to set alarm flag\r\n");
}
void PCF85063_Read_Alarm(datetime_t *time) // Read Alarm
{
uint8_t buf[5] = {0};
esp_err_t ret = I2C_Read(PCF85063_ADDRESS, RTC_SECOND_ALARM, buf, sizeof(buf));
if(ret != ESP_OK)
printf("PCF85063 : Failed to read the alarm sign\r\n");
else{
time->second = bcdToDec(buf[0] & 0x7F);
time->minute = bcdToDec(buf[1] & 0x7F);
time->hour = bcdToDec(buf[2] & 0x3F);
time->day = bcdToDec(buf[3] & 0x3F);
time->dotw = bcdToDec(buf[4] & 0x07);
}
}
static uint8_t decToBcd(int val) // Convert normal decimal numbers to binary coded decimal
{
return (uint8_t)((val / 10 * 16) + (val % 10));
}
static int bcdToDec(uint8_t val) // Convert binary coded decimal to normal decimal numbers
{
return (int)((val / 16 * 10) + (val % 16));
}
void datetime_to_str(char *datetime_str,datetime_t time)
{
sprintf(datetime_str, " %d.%d.%d %d:%d:%d %s", time.year, time.month,
time.day, time.hour, time.minute, time.second, Week[time.dotw]);
}

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lib/RTC/WS_PCF85063.h Normal file
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#pragma once
#include "I2C_Driver.h"
//PCF85063_ADDRESS
#define PCF85063_ADDRESS (0x51)
//
#define YEAR_OFFSET (1970)
// registar overview - crtl & status reg
#define RTC_CTRL_1_ADDR (0x00)
#define RTC_CTRL_2_ADDR (0x01)
#define RTC_OFFSET_ADDR (0x02)
#define RTC_RAM_by_ADDR (0x03)
// registar overview - time & data reg
#define RTC_SECOND_ADDR (0x04)
#define RTC_MINUTE_ADDR (0x05)
#define RTC_HOUR_ADDR (0x06)
#define RTC_DAY_ADDR (0x07)
#define RTC_WDAY_ADDR (0x08)
#define RTC_MONTH_ADDR (0x09)
#define RTC_YEAR_ADDR (0x0A) // years 0-99; calculate real year = 1970 + RCC reg year
// registar overview - alarm reg
#define RTC_SECOND_ALARM (0x0B)
#define RTC_MINUTE_ALARM (0x0C)
#define RTC_HOUR_ALARM (0x0D)
#define RTC_DAY_ALARM (0x0E)
#define RTC_WDAY_ALARM (0x0F)
// registar overview - timer reg
#define RTC_TIMER_VAL (0x10)
#define RTC_TIMER_MODE (0x11)
//RTC_CTRL_1 registar
#define RTC_CTRL_1_EXT_TEST (0x80)
#define RTC_CTRL_1_STOP (0x20) //0-RTC clock runs 1- RTC clock is stopped
#define RTC_CTRL_1_SR (0X10) //0-no software reset 1-initiate software rese
#define RTC_CTRL_1_CIE (0X04) //0-no correction interrupt generated 1-interrupt pulses are generated at every correction cycle
#define RTC_CTRL_1_12_24 (0X02) //0-24H 1-12H
#define RTC_CTRL_1_CAP_SEL (0X01) //0-7PF 1-12.5PF
//RTC_CTRL_2 registar
#define RTC_CTRL_2_AIE (0X80) //alarm interrupt 0-disalbe 1-enable
#define RTC_CTRL_2_AF (0X40) //alarm flag 0-inactive/cleared 1-active/unchanged
#define RTC_CTRL_2_MI (0X20) //minute interrupt 0-disalbe 1-enable
#define RTC_CTRL_2_HMI (0X10) //half minute interrupt
#define RTC_CTRL_2_TF (0X08)
//
#define RTC_OFFSET_MODE (0X80)
//
#define RTC_TIMER_MODE_TE (0X04) //timer enable 0-disalbe 1-enable
#define RTC_TIMER_MODE_TIE (0X02) //timer interrupt enable 0-disalbe 1-enable
#define RTC_TIMER_MODE_TI_TP (0X01) //timer interrupt mode 0-interrupt follows timer flag 1-interrupt generates a pulse
// format
#define RTC_ALARM (0x80) // set AEN_x registers
#define RTC_CTRL_1_DEFAULT (0x00)
#define RTC_CTRL_2_DEFAULT (0x00)
#define RTC_TIMER_FLAG (0x08)
typedef struct {
uint16_t year;
uint8_t month;
uint8_t day;
uint8_t dotw;
uint8_t hour;
uint8_t minute;
uint8_t second;
}datetime_t;
const unsigned char MonthStr[12][4] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov","Dec"};
const unsigned char Week[7][5] = {"SUN","Mon","Tues","Wed","Thur","Fri","Sat"};
extern datetime_t datetime;
void PCF85063_Init(void);
void PCF85063_Reset(void);
void PCF85063Task(void *parameter);
void PCF85063_Set_Time(datetime_t time);
void PCF85063_Set_Date(datetime_t date);
void PCF85063_Set_All(datetime_t time);
void PCF85063_Read_Time(datetime_t *time);
void PCF85063_Enable_Alarm(void);
uint8_t PCF85063_Get_Alarm_Flag();
void PCF85063_Set_Alarm(datetime_t time);
void PCF85063_Read_Alarm(datetime_t *time);
void datetime_to_str(char *datetime_str,datetime_t time);
// weekday format
// 0 - sunday
// 1 - monday
// 2 - tuesday
// 3 - wednesday
// 4 - thursday
// 5 - friday
// 6 - saturday