my prototype PCF8563's library
Diff: PCF8563.cpp
- Revision:
- 0:47c63ed3af91
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PCF8563.cpp Fri Jan 22 08:50:40 2016 +0000 @@ -0,0 +1,118 @@ +#include "mbed.h" +#include "PCF8563.h" + +extern Serial dbg; + +PCF8563::PCF8563(PinName sda, PinName scl) : pcf8563_i2c (sda, scl) +{ + pcf8563_i2c.frequency(PCF8563_FREQ); +} + +time_t PCF8563::now() +{ + struct tm now; + char start = 0x02; + char buffer[7]; + + if(pcf8563_i2c.write(W8563_ADDR, &start, 1) != 0) return 0; + if(pcf8563_i2c.read(R8563_ADDR, buffer, 7) != 0) return 0; + + now.tm_sec = bcdToDecimal(buffer[0] & 0x7F); + now.tm_min = bcdToDecimal(buffer[1] & 0x7F); + now.tm_hour = bcdToDecimal(buffer[2] & 0x3F); + now.tm_mday = bcdToDecimal(buffer[3] & 0x3F); + now.tm_mon = bcdToDecimal(buffer[5] & 0x1F) - 1; + now.tm_year = bcdToDecimal(buffer[6]) + 2000 - 1900; + + return mktime(&now); +} + +bool PCF8563::set_time(time_t time) +{ + struct tm *now; + char buffer[8]; + + now = localtime(&time); + + buffer[0] = 0x02; // memory address + buffer[1] = decimalToBcd(now->tm_sec) & 0x7F; // VL = 0 + buffer[2] = decimalToBcd(now->tm_min) & 0x7F; + buffer[3] = decimalToBcd(now->tm_hour) & 0x3F; + buffer[4] = now->tm_wday + 1; + buffer[5] = decimalToBcd(now->tm_mday) & 0x3F; + buffer[6] = decimalToBcd(now->tm_mon+1) & 0x1F; + buffer[7] = decimalToBcd(now->tm_year + 1900 - 2000); + + if(pcf8563_i2c.write(W8563_ADDR, buffer, 9) != 0) return 0; + + return true; +} + +bool PCF8563::set_alarm(time_t time) +{ + struct tm *now; + char buffer[5]; + + now = localtime(&time); + + buffer[0] = 0x09; // memory address + buffer[1] = decimalToBcd(now->tm_min) & 0x80; + buffer[2] = decimalToBcd(now->tm_hour) & 0x80; + buffer[3] = decimalToBcd(now->tm_mday) & 0x80; + buffer[4] = (now->tm_wday + 1) & 0x80; + if(pcf8563_i2c.write(W8563_ADDR, buffer, 4) != 0) return 0; + + char Int[2]; + Int[0] = 0x01; // control address + Int[1] = 0x02; // set AIE to 1 for INT pin + if(pcf8563_i2c.write(W8563_ADDR, Int, 2) != 0) return 0; + + return true; +} + +bool PCF8563::alarmOff() +{ + char start = 0x01; + char buffer; + + if(pcf8563_i2c.write(W8563_ADDR, &start, 1) != 0) return 0; + //if(pcf8563_i2c.read(R8563_ADDR, buffer, 1) != 0) return 0; + + pcf8563_i2c.start(); + pcf8563_i2c.write(R8563_ADDR); + buffer = pcf8563_i2c.read(0); + pcf8563_i2c.stop(); + + buffer = buffer - 0x08; // clear AF to turn off alarm + + char send[2]; + send[0] = 0x01; //control 1 address + send[1] = buffer; + if(pcf8563_i2c.write(W8563_ADDR, send, 2) != 0) return 0; + + return true; +} + +bool PCF8563::check_alarm() +{ + char start = 0x01; + char buffer; + + if(pcf8563_i2c.write(W8563_ADDR, &start, 1) != 0) return 0; + //if(pcf8563_i2c.read(R8563_ADDR, buffer, 1) != 0) return 0; + + pcf8563_i2c.start(); + pcf8563_i2c.write(R8563_ADDR); + buffer = pcf8563_i2c.read(0); + pcf8563_i2c.stop(); + + buffer = buffer & 0x08; + if(buffer == 0x08) + { + dbg.printf("== ALARM ON ==\r\n"); + wait_ms(200); + + alarmOff(); + } + return true; +}