Diff: Maple.cpp

Revision:

0:0be38b583cf7

Child:

1:aefa1992ce0f

diff -r 000000000000 -r 0be38b583cf7 Maple.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Maple.cpp	Sun Sep 25 11:37:21 2011 +0000
@@ -0,0 +1,213 @@
+// MAPLE board[MARM01-BASE]
+// common functions
+//
+#include "Maple_RTC.h"
+#include "Maple_I2C.h"
+#include "Maple_LCD.h"
+#include "Maple.h"
+#include "mbed.h"
+
+// char to hexadecimal (4 bits to 1 hexadecimal digit)
+char char_to_hex1(int c) {
+    const char hex_code[] = "0123456789abcdef";
+
+    return hex_code[c];
+}
+
+// char to hexadecimal (1 byte, 2 hexadecimal digits)
+void char_to_hex(int c, char h[]) {
+    h[0] = char_to_hex1(c >> 4);
+    h[1] = char_to_hex1(c & 0x0f);
+    h[2] = '\0';
+}
+
+// BCD to integer
+int bcd_to_int(char b) {
+    return ((b >> 4) * 10) + (b & 0x0f);
+}
+
+// integer to BCD
+char int_to_bcd(int i) {
+    return ((i / 10) << 4) + (i % 10);
+}
+
+// increment BCD
+//   (min, max+1)
+//   0x00, 0x99 .. 00-99: year  0x00
+//   0x01, 0x12 .. 01-12: month
+//   0x01, max  .. 01-max: day
+//   0x00, 0x23 .. 00-23: hour
+//   0x00, 0x59 .. 00-59: minute, second
+char increment_bcd(char bcd_data, char bcd_min, char bcd_max) {
+    if((bcd_data & 0x0f) == 0x09) {
+        bcd_data += 0x07;   // + 0x10 - 0x0a + 0x01
+    }
+    else {
+        bcd_data += 0x01;
+    }
+    if(bcd_data > bcd_max) {
+        bcd_data = bcd_min;
+    }
+    return bcd_data;
+}
+
+// decrement bcd
+//   (min, max+1)
+//   0x00, 0x99 .. 00-99: year  0x00
+//   0x01, 0x12 .. 01-12: month
+//   0x01, max  .. 01-max: day
+//   0x00, 0x23 .. 00-23: hour
+//   0x00, 0x59 .. 00-59: minute, second
+char decrement_bcd(char bcd_data, char bcd_min, char bcd_max) {
+    if(bcd_data < (bcd_min + 0x01)) {
+        bcd_data = bcd_max;
+    }        
+    else if((bcd_data & 0x0f) == 0x00) {
+        bcd_data -= 0x07;   // - 0x10 + 0x0a - 0x01;
+    }
+    else {
+        bcd_data -= 0x01;
+    }
+    return bcd_data;
+}
+
+// weekday string(2 characters)
+//  weekday: 0(SU) .. 6(SA)
+void int_to_weekday2(int weekday, char s[]) {
+    const char weekday_string2[7][3] = {"SU", "MO", "TU", "WE", "TH", "FR", "SA"};
+
+    s[0] = weekday_string2[weekday][0];
+    s[1] = weekday_string2[weekday][1];
+    s[2] = '\0';
+}
+
+// weekday string(3 characters)
+//  weekday: 0(SUN) .. 6(SAT)
+void int_to_weekday3(int weekday, char s[]) {
+    const char weekday_string3[7][4] = {"SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT"};
+
+    s[0] = weekday_string3[weekday][0];
+    s[1] = weekday_string3[weekday][1];
+    s[2] = weekday_string3[weekday][2];
+    s[3] = '\0';
+}
+
+// year in 2cyy format
+//   c: century .. 0x00/0x01
+int bcd_to_year(char century, char bcd_year) {
+    return 2000 + (century * 100) + bcd_to_int(bcd_year);
+}
+
+// check leap year
+//   false: no, true:yes
+bool leap_year(int year) {
+    return ((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0);
+}
+
+// days in a month
+int days_in_month(int year, int month) {
+    const int days_leap[13]   = { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
+    const int days_common[13] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
+
+    if (leap_year(year)) {
+        return days_leap[month];
+    }
+    else {
+        return days_common[month];
+    }
+}
+
+// (days in a month) + 1 in BCD
+char bcd_days_in_month(char century, char bcd_year, char bcd_month) {
+    return int_to_bcd(days_in_month(bcd_to_year(century, bcd_year), bcd_to_int(bcd_month)));
+}
+
+// Zeller's congruence for Calendario gregoriano
+//   0:SUN .. 6:SAT
+int bcd_date_to_weekday(char bcd_century, char bcd_year, char bcd_month, char bcd_day) {
+    int century, year, month, day;
+
+    century = 20 + bcd_century;
+    year  = bcd_to_int(bcd_year);
+    month = bcd_to_int(bcd_month);
+    day   = bcd_to_int(bcd_day);
+    return (day + (((month + 1) * 26 ) / 10) + year + year / 4 + century / 4 - century * 2 + 6) % 7;
+}
+
+// test test test test test test test test
+// test: RTC read and raw print to LCD
+void RTC_to_LCD_raw() {
+    char d[17];
+
+    i2c_RTC_read(RTC_REG_CONTROL1, d, 16);
+    LCD_locate(0, 0);
+    for(int i = 0; i < 8; ++i) {
+        LCD_print_hex(d[i]);
+    }
+    LCD_locate(1, 0);
+    for(int i = 8; i < 16; ++i) {
+        LCD_print_hex(d[i]);
+    }
+}
+
+// test 2 of LCD
+//   display 64 characters in 1st/2nd row and shift 
+//
+void LCD_display_all_char_shift() {
+        LCD_display_32char_shift(0x00);
+        LCD_display_32char_shift(0x40);
+        LCD_display_32char_shift(0x80);
+        LCD_display_32char_shift(0xC0);
+}
+
+static void LCD_display_32char_shift(char base) {
+    int i;
+    
+    LCD_clear_display();                             // select 1st row and clear display
+    for(i = 0; i < 32; ++i) {
+        LCD_print_char(base + i);     // write 32 characters
+    }
+    LCD_locate(1, 0);                                // select 2nd row
+    for(i = 32; i < 64; ++i) {
+        LCD_print_char(base + i);     // write 32 characters
+    }
+    for(i = 0; i < 24; ++i) {
+        LCD_cursor_or_display_shift(1, 0);           // shift right 24 times
+        wait_ms(1000);
+    }
+    for(i = 0; i < 32; ++i) {
+        LCD_cursor_or_display_shift(1, 1);           // shift left 32 times
+        wait_ms(1000);
+    }
+    for(i = 0; i < 8; ++i) {
+        LCD_cursor_or_display_shift(1, 0);           // shift right 8 times
+        wait_ms(1000);
+    }
+}
+
+// test 1 of LCD
+//   display 16x2 characters with 1st and 2nd row 
+void LCD_display_all_char() { 
+    LCD_display_32char(0x00);
+    LCD_display_32char(0x20);
+    LCD_display_32char(0x40);
+    LCD_display_32char(0x60);
+    LCD_display_32char(0x80);
+    LCD_display_32char(0xa0);
+    LCD_display_32char(0xc0);
+    LCD_display_32char(0xe0);
+}
+
+static void LCD_display_32char(char base) {
+    int i;
+
+    LCD_clear_display();                             // select 1st row and clear display
+    for(i = 0; i < 16; ++i) {
+        LCD_print_char(base + i);     // write 1st-half 16 characters
+    }
+    LCD_locate(1, 0);                                // select 2nd row
+    for(i = 16; i < 32; ++i) {
+        LCD_print_char(base + i);     // write 2nd-half 16 characters
+    }
+    wait_ms(3000);
+}