DPPU
copy from mbed
Revision 0:b7ac3add7d83, committed 2018-03-02
- Comitter:
- irsanjul
- Date:
- Fri Mar 02 07:01:17 2018 +0000
- Child:
- 1:41dd31bbbe6d
- Commit message:
- copy from mbed
Changed in this revision
| PCF8523.cpp | Show annotated file Show diff for this revision Revisions of this file |
| PCF8523.h | Show annotated file Show diff for this revision Revisions of this file |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/PCF8523.cpp Fri Mar 02 07:01:17 2018 +0000
@@ -0,0 +1,226 @@
+#include "mbed.h"
+#include "PCF8523.h"
+
+extern Serial dbg;
+
+PCF8523::PCF8523(PinName sda, PinName scl) : i2c (sda, scl)
+{
+ i2c.frequency(100000);
+}
+
+PCF8523::~PCF8523()
+{
+
+}
+
+bool PCF8523::write(char adr, char data)
+{
+ w[0] = adr;
+ w[1] = data;
+ if (i2c.write(address, w, 2) != 0) return 0;
+
+ return true;
+}
+
+char PCF8523::read(char adr)
+{
+ char start = adr;
+ if (i2c.write(address, &start, 1, true) != 0) return 0;
+ if (i2c.read(address, r, 1) != 0) return 0;
+
+ return r[0];
+}
+
+time_t PCF8523::now()
+{
+ struct tm now;
+
+ char buffer[6];
+
+ buffer [0] = read(SEC);
+ buffer [1] = read(MIN);
+ buffer [2] = read(HOUR);
+ buffer [3] = read(DAY);
+ buffer [4] = read(MONTH);
+ buffer [5] = read(YEAR);
+
+ 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[4] & 0x1F) - 1;
+ now.tm_year = bcdToDecimal(buffer[5] & 0xFF) + 2000 - 1900;
+
+ return mktime(&now);
+}
+
+bool PCF8523::set_time(time_t time)
+{
+ struct tm *now;
+ char buffer[9];
+
+ now = localtime(&time);
+
+ buffer[0] = decimalToBcd(now->tm_sec) & 0x7F; // VL = 0
+ buffer[1] = decimalToBcd(now->tm_min) & 0x7F;
+ buffer[2] = decimalToBcd(now->tm_hour) & 0x3F;
+ buffer[3] = decimalToBcd(now->tm_mday) & 0x3F;
+ buffer[4] = now->tm_wday + 1;
+ buffer[5] = decimalToBcd(now->tm_mon+1) & 0x1F;
+ buffer[6] = decimalToBcd(now->tm_year + 1900 - 2000);
+
+ if(!write(SEC, buffer[0]))return 0;
+ if(!write(MIN, buffer[1]))return 0;
+ if(!write(HOUR, buffer[2]))return 0;
+ if(!write(DAY, buffer[3]))return 0;
+ if(!write(WDAY, buffer[4]))return 0;
+ if(!write(MONTH, buffer[5]))return 0;
+ if(!write(YEAR, buffer[6]))return 0;
+
+ return true;
+}
+
+bool PCF8523::IsConnected()
+{
+ bool ok = false;
+
+ i2c.start();
+ i2c.stop();
+
+ if (i2c.read(address, &data[0], 1) != 0)
+ {
+ dbg.printf("PCF8523 is not detected\r\n");
+ ok = false;
+ }
+ else
+ {
+ dbg.printf("PCF8523 is detected\r\n");
+ ok = true;
+ }
+
+ data[0] = 0;
+ i2c.start();
+ i2c.stop();
+
+ return ok;
+}
+
+bool PCF8523::set_alarm(const struct tm &now, bool min_en, bool hour_en, bool mday_en)
+{
+ /*
+ // Alarm register | Bit 7 | Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
+ CTRL1 = 0x00, // Ctrl 1 |Cap Sel| T | Stop | SR | 12-24 | SIE | AIE | CIE |
+
+ MINALARM = 0x0A, // Minute | AEN_M | ( 0 - 59 ) |
+ HOURALARM = 0x0B, // Hour | AEN_H | X | ( 0 - 23 ) |
+ // Hour | AEN_H | X | AM/PM | ( 1 - 12 ) |
+ DAYALARM = 0x0C, // Day | AEN_D | X | ( 1 - 31 ) |
+ WDAYALARM = 0x0D, // Day of week | AEN_W | X | X | X | X | ( 0 - 6 ) |
+
+ AEN_M, AEN_H, AEN_D, AEN_W => 0 = enable; 1 = disable
+ */
+
+ char buffer[3] = {0x00, 0x00, 0x00};
+
+// if(now.tm_min >= 60)
+// now.tm_min = 0;
+//
+// if(now.tm_hour >= 24)
+// now.tm_hour = 0;
+//
+// if(now.tm_mday >= 32)
+// now.tm_mday = 1;
+//
+ if(min_en)
+ {
+ buffer[0] = (decimalToBcd(now.tm_min) & 0x7F);
+ if(!write(MINALARM, buffer[0]))return 0;
+ }
+ else
+ {
+ buffer[0] = (decimalToBcd(now.tm_min) | 0x80);
+ if(!write(MINALARM, buffer[0]))return 0;
+ }
+
+ if(hour_en)
+ {
+ buffer[1] = (decimalToBcd(now.tm_hour) & 0x3F);
+ if(!write(HOURALARM, buffer[1]))return 0;
+ }
+ else
+ {
+ buffer[1] = (decimalToBcd(now.tm_hour) | 0x80);
+ if(!write(HOURALARM, buffer[1]))return 0;
+ }
+
+ if(mday_en)
+ {
+ buffer[2] = (decimalToBcd(now.tm_mday) & 0x3F);
+ if(!write(DAYALARM, buffer[2]))return 0;
+ }
+ else
+ {
+ buffer[2] = (decimalToBcd(now.tm_mday) | 0x80);
+ if(!write(DAYALARM, buffer[2]))return 0;
+ }
+ return true;
+}
+
+bool PCF8523::enable_alarm(bool enable)
+{
+ char buffer = read(CTRL1);
+
+ if(enable)
+ {
+ // Disable Clockout & other Timers
+ if(!write(TMRCLKOUT, 0x38))
+
+ // Clear any existing flags
+ alarm_off(0x08);
+
+ // enable AIE bit
+ buffer = buffer | 0x02;
+ }
+ else
+ {
+ buffer &= ~0x02;
+ }
+
+ if(!write(CTRL1, buffer)) return 0;
+
+ return true;
+}
+
+bool PCF8523::alarm_off(char buffer)
+{
+ // clear AF flag
+ buffer = buffer - 0x08;
+
+ if(!write(CTRL2, buffer))return 0;
+
+ return true;
+}
+
+bool PCF8523::check_alarm()
+{
+ char buffer;
+
+ buffer = read(CTRL2);
+
+ if(buffer & 0x08)
+ {
+ if(alarm_off(buffer))
+ return true;
+ else return 0;
+ }
+ else return 0;
+}
+
+bool PCF8523::software_reset()
+{
+ char buffer = 0x58;
+
+ if(!write(CTRL1, buffer)) return 0;
+
+ return 1;
+}
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/PCF8523.h Fri Mar 02 07:01:17 2018 +0000
@@ -0,0 +1,76 @@
+#ifndef PCF8523_H
+#define PCF8523_H
+
+#include "mbed.h"
+
+#define address 0xD0
+
+class PCF8523
+{
+public:
+
+ enum RegisterName
+ {
+ // Control Register | Bit 7 | Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
+ CTRL1 = 0x00, // Ctrl 1 |Cap Sel| T | Stop | SR | 12-24 | SIE | AIE | CIE |
+ CTRL2 = 0x01, // Ctrl 2 | WTAF | CTAF | CTBF | SF | AF | WTAIE | CTAIE | CTBIE |
+ CTRL3 = 0x02, // Ctrl 3 | PM [2:0] | X | BSF | BLF | BSIE | BLIE |
+
+ // Time and Date Register
+ SEC = 0x03, // Second | OS | ( 0 - 59 ) |
+ MIN = 0x04, // Minute | X | ( 0 - 59 ) |
+ HOUR = 0x05, // Hour | X | X | AM/PM | ( 1 - 12 ) |
+ // Hour | X | X | ( 0 - 23 ) |
+ DAY = 0x06, // Day | X | X | ( 1 - 31 ) |
+ WDAY = 0x07, // Day of week | X | X | X | X | X | ( 0 - 6 ) |
+ MONTH = 0x08, // month | X | X | X | ( 1 - 12 ) |
+ YEAR = 0x09, // year | ( 0 - 99 ) |
+
+ // Alarm register
+ MINALARM = 0x0A, // Minute | AEN_M | ( 0 - 59 ) |
+ HOURALARM = 0x0B, // Hour | AEN_H | X | ( 0 - 23 ) |
+ // Hour | AEN_H | X | AM/PM | ( 1 - 12 ) |
+ DAYALARM = 0x0C, // Day | AEN_D | X | ( 1 - 31 ) |
+ WDAYALARM = 0x0D, // Day of week | AEN_W | X | X | X | X | ( 0 - 6 ) |
+
+ // Offset Control Register
+ OFFSET = 0x0E, // OffSet ctrl | MODE | OFFSET |
+
+ // ClockOut adn Timer Register
+ TMRCLKOUT = 0x0F, // Timer Clk Out| TAM | TBM | COF | TAC | TBC |
+ TIMERAFR = 0x10, // Timer A Freq | X | X | X | X | X | TAQ |
+ TIMERARG = 0x11, // Timer A Reg | T_A [7:0] |
+ TIMERBFR = 0x12, // Timer B Freq | X | TBW | X | TBQ |
+ TIMERBRG = 0x13, // Timer B Reg | T_B [7:0] |
+ };
+
+ bool write(char adr, char data);
+ char read(char adr);
+ time_t now();
+ bool set_time(time_t time);
+ bool set_alarm(const struct tm &now, bool min_en=false, bool hour_en=false, bool mday_en=false);
+ bool enable_alarm(bool enable=false);
+ bool alarm_off(char buffer);
+ bool check_alarm();
+ bool IsConnected();
+ bool software_reset();
+
+ PCF8523(PinName scl, PinName sda);
+ ~PCF8523();
+
+private:
+ I2C i2c;
+ char data[64];
+ char w[32];
+ char r[32];
+
+ static int bcdToDecimal(int bcd) {
+ return ((bcd & 0xF0) >> 4) * 10 + (bcd & 0x0F);
+ }
+
+ static int decimalToBcd(int dec) {
+ return (dec % 10) + ((dec / 10) << 4);
+ }
+};
+
+#endif
\ No newline at end of file