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bytemap.h
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bytemap.h
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struct bits3231 {
// 00h time seconds 00 - 59
unsigned timeSec:4; // seconds digit 0 - 9
unsigned timeSec10:3; // tens of seconds digit 0 - 5
unsigned :1; // skip high bit
// 01h time minutes 00 - 59
unsigned timeMin:4; // minutes digit 0 - 9
unsigned timeMin10:3; // tens of minuts digit 0 - 5
unsigned: 1; // skip high bit
// 02h time hour 1 - 12 or 0 - 23
unsigned timeHour:4; // hours digit 0 - 9
unsigned timeHour10:1; // hour ten digit 0 - 1
unsigned timeAP20:1; // 0=am, 1=pm if timeMode12 = 1, else 0 = 0, 1 = 20-hour
unsigned timeMode12:1; // 1=12-hour mode, 0=24-hour mode
unisgned :1; // skip high bit
// 03h time day of week
unsigned timeDay:3; // 1 - 7, user-defined
unisgned :5; // skip bits 7:3
// 04h time date of month 01 - 31
unsigned timeDate:4; // date 0 - 9
unsigned timeDate10:2; // tens 0 - 3
unsigned :2; // skip bits 7:6
// 05h time month 01 - 12
unsigned timeMonth:4; // month digit 0 - 9
unsigned timeMonth10:1; // month tens digit 0 - 1
unsigned :2; // skip bits 6:5
unsigned timeCentury:1; // century bit
// 06h time year 00-99
unsigned timeYear:4; // year digit 0 - 9
unsigned timeYear10:4; // year tens digit 0 - 9
// 07h Alarm 1 seconds 00 - 59
unsigned A1Sec:4; // seconds digit 0 - 9
unsigned A1Sec10:3; // tens of seconds digit 0 - 5
unsigned A1M1:1; // Alarm 1 Bit 1
// 08h Alarm 1 minutes 00 - 59
unsigned A1Min:4; // minutes digit 0 - 9
unsigned A1Min10:3; // tens of minuts digit 0 - 5
unsigned: A1M2; // Alarm 1 Bit 2
// 09h Alarm 1 hour 1 - 12 or 0 - 23
unsigned A1Hour:4; // hours digit 0 - 9
unsigned A1Hour10:1; // hour ten digit 0 - 1
unsigned A1AP20:1; // 0=am, 1=pm if time12 = 1, else 0 = 0, 1 = 20-hour
unsigned A1Mode12:1; // 1=12-hour mode, 0=24-hour mode
unsigned A1M3:1; // Alarm 1 Bit 3
// 0Ah Alarm 1 date
unsigned A1DayDate:4; // month digit 0 - 9 if A1DYDT = 1, else day 1 - 7
unsigned A1Date10:2; // month tens 0-3 if A1DyDT = 1
unsigned A1DYDT:1; // 1 = match month, 0 = match day of week
unsigned A1M4:1; // Alarm 1 Bit 4
//
// note: there is no alarm bit named A2M1
//
// 0Bh Alarm 2 minutes 00 - 59
unsigned A2Min:4; // minutes digit 0 - 9
unsigned A2Min10:3; // tens of minuts digit 0 - 5
unsigned: A2M2; // Alarm 2 Bit 2
// 0Ch Alarm 2 hour 1 - 12 or 0 - 23
unsigned A2Hour:4; // hours digit 0 - 9
unsigned A2Hour10:1; // hour ten digit 0 - 1
unsigned A2AP20:1; // 0=am, 1=pm if time12 = 1, else 0 = 0, 1 = 20-hour
unsigned A2Mode12:1; // 1=12-hour mode, 0=24-hour mode
unsigned A2M3:1; // Alarm 2 Bit 3
// 0Dh Alarm 2 date
unsigned A2DayDate:4; // month digit 0 - 9 if A1DYDT = 1, else day 1 - 7
unsigned A2Date10:2; // month tens 0-3 if A1DyDT = 1
unsigned A2DYDT:1; // 1 = match month, 0 = match day of week
unsigned A2M4:1; // Alarm 2 Bit 4
// 0Eh Device control register; see data sheet
unsigned EOSC:1; // enable oscillator, active low; all data static when high
unsigned BBSQW:1; // battery-backed square wave enable
unsigned CONV:1; // convert temperature, active high
unsigned RS2:1; // set square wave frequency
unsigned RS1:1; // set square wave frequency
unsigned INTCN:1; // interrupt control, high enables interrupt output
unsigned A2IE:1; // enbable interrupt on A2 match
unsigned A1IE:1; // enable interrupt on A1 match
// 0Fh Device control / status register
unsigned OSF:1; // oscillator stop flag
unsigned :3; // skip bits 6:4
unsigned EN23KHZ:1; // enable 32.768kHz square wave output, active high
unsigned BSY:1; // device busy flag
unsigned A2F:1; // alarm 2 flag, high = time match with Alarm 2
unsigned A1F:1; // alarm 1 flag, high = time match with Alarm 1
// 10h Aging offset
signed AgingOffset:8; // aging offset in two's-complement form
// 11h MSB of temperature
signed tempMSB:8; // MSB of temperature in two's complement form
// 12h LSB of temperature
unsigned :6; // skip bits 5:0
unsigned tempLSB:2; // LSB in bits 7:6
}