| Line No. | Rev | Author | Line |
|---|---|---|---|
| 1 | 6 | kaklik | /*! \file lcd.c \brief Character LCD driver for HD44780/SED1278 displays. */ |
| 2 | //***************************************************************************** |
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| 3 | // |
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| 4 | // File Name : 'lcd.c' |
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| 5 | // Title : Character LCD driver for HD44780/SED1278 displays |
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| 6 | // (usable in mem-mapped, or I/O mode) |
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| 7 | // Author : Pascal Stang |
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| 8 | // Created : 11/22/2000 |
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| 9 | // Revised : 4/30/2002 |
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| 10 | // Version : 1.1 |
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| 11 | // Target MCU : Atmel AVR series |
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| 12 | // Editor Tabs : 4 |
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| 13 | // |
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| 14 | // This code is distributed under the GNU Public License |
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| 15 | // which can be found at http://www.gnu.org/licenses/gpl.txt |
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| 16 | // |
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| 17 | //***************************************************************************** |
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| 18 | |||
| 19 | #include <avr/io.h> |
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| 20 | #include <avr/pgmspace.h> |
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| 21 | |||
| 22 | #include "global.h" |
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| 23 | #include "timer.h" |
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| 24 | |||
| 25 | #include "lcd.h" |
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| 26 | |||
| 27 | // custom LCD characters |
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| 28 | unsigned char __attribute__ ((progmem)) LcdCustomChar[] = |
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| 29 | { |
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| 30 | 0x00, 0x1F, 0x00, 0x00, 0x00, 0x00, 0x1F, 0x00, // 0. 0/5 full progress block |
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| 31 | 0x00, 0x1F, 0x10, 0x10, 0x10, 0x10, 0x1F, 0x00, // 1. 1/5 full progress block |
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| 32 | 0x00, 0x1F, 0x18, 0x18, 0x18, 0x18, 0x1F, 0x00, // 2. 2/5 full progress block |
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| 33 | 0x00, 0x1F, 0x1C, 0x1C, 0x1C, 0x1C, 0x1F, 0x00, // 3. 3/5 full progress block |
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| 34 | 0x00, 0x1F, 0x1E, 0x1E, 0x1E, 0x1E, 0x1F, 0x00, // 4. 4/5 full progress block |
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| 35 | 0x00, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x00, // 5. 5/5 full progress block |
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| 36 | 0x03, 0x07, 0x0F, 0x1F, 0x0F, 0x07, 0x03, 0x00, // 6. rewind arrow |
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| 37 | 0x00, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x00, // 7. stop block |
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| 38 | 0x1B, 0x1B, 0x1B, 0x1B, 0x1B, 0x1B, 0x1B, 0x00, // 8. pause bars |
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| 39 | 0x18, 0x1C, 0x1E, 0x1F, 0x1E, 0x1C, 0x18, 0x00, // 9. fast-forward arrow |
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| 40 | 0x00, 0x04, 0x04, 0x0E, 0x0E, 0x1F, 0x1F, 0x00, // 10. scroll up arrow |
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| 41 | 0x00, 0x1F, 0x1F, 0x0E, 0x0E, 0x04, 0x04, 0x00, // 11. scroll down arrow |
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| 42 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 12. blank character |
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| 43 | 0x00, 0x0E, 0x19, 0x15, 0x13, 0x0E, 0x00, 0x00, // 13. animated play icon frame 0 |
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| 44 | 0x00, 0x0E, 0x15, 0x15, 0x15, 0x0E, 0x00, 0x00, // 14. animated play icon frame 1 |
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| 45 | 0x00, 0x0E, 0x13, 0x15, 0x19, 0x0E, 0x00, 0x00, // 15. animated play icon frame 2 |
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| 46 | 0x00, 0x0E, 0x11, 0x1F, 0x11, 0x0E, 0x00, 0x00, // 16. animated play icon frame 3 |
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| 47 | }; |
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| 48 | |||
| 49 | /*************************************************************/ |
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| 50 | /********************** LOCAL FUNCTIONS **********************/ |
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| 51 | /*************************************************************/ |
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| 52 | |||
| 53 | void lcdInitHW(void) |
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| 54 | { |
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| 55 | // initialize I/O ports |
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| 56 | // if I/O interface is in use |
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| 57 | #ifdef LCD_PORT_INTERFACE |
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| 58 | // initialize LCD control lines |
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| 59 | cbi(LCD_CTRL_PORT, LCD_CTRL_RS); |
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| 60 | cbi(LCD_CTRL_PORT, LCD_CTRL_RW); |
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| 61 | cbi(LCD_CTRL_PORT, LCD_CTRL_E); |
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| 62 | // initialize LCD control lines to output |
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| 63 | sbi(LCD_CTRL_DDR, LCD_CTRL_RS); |
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| 64 | sbi(LCD_CTRL_DDR, LCD_CTRL_RW); |
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| 65 | sbi(LCD_CTRL_DDR, LCD_CTRL_E); |
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| 66 | // initialize LCD data port to input |
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| 67 | // initialize LCD data lines to pull-up |
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| 68 | #ifdef LCD_DATA_4BIT |
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| 69 | outb(LCD_DATA_DDR, inb(LCD_DATA_DDR)&0x0F); // set data I/O lines to input (4bit) |
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| 70 | outb(LCD_DATA_POUT, inb(LCD_DATA_POUT)|0xF0); // set pull-ups to on (4bit) |
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| 71 | #else |
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| 72 | outb(LCD_DATA_DDR, 0x00); // set data I/O lines to input (8bit) |
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| 73 | outb(LCD_DATA_POUT, 0xFF); // set pull-ups to on (8bit) |
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| 74 | #endif |
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| 75 | #else |
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| 76 | // enable external memory bus if not already enabled |
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| 77 | sbi(MCUCR, SRE); // enable bus interface |
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| 78 | #endif |
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| 79 | } |
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| 80 | |||
| 81 | void lcdBusyWait(void) |
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| 82 | { |
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| 83 | // wait until LCD busy bit goes to zero |
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| 84 | // do a read from control register |
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| 85 | #ifdef LCD_PORT_INTERFACE |
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| 86 | cbi(LCD_CTRL_PORT, LCD_CTRL_RS); // set RS to "control" |
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| 87 | #ifdef LCD_DATA_4BIT |
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| 88 | outb(LCD_DATA_DDR, inb(LCD_DATA_DDR)&0x0F); // set data I/O lines to input (4bit) |
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| 89 | outb(LCD_DATA_POUT, inb(LCD_DATA_POUT)|0xF0); // set pull-ups to on (4bit) |
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| 90 | #else |
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| 91 | outb(LCD_DATA_DDR, 0x00); // set data I/O lines to input (8bit) |
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| 92 | outb(LCD_DATA_POUT, 0xFF); // set pull-ups to on (8bit) |
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| 93 | #endif |
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| 94 | sbi(LCD_CTRL_PORT, LCD_CTRL_RW); // set R/W to "read" |
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| 95 | sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line |
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| 96 | LCD_DELAY; // wait |
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| 97 | while(inb(LCD_DATA_PIN) & 1<<LCD_BUSY) |
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| 98 | { |
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| 99 | cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line |
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| 100 | LCD_DELAY; // wait |
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| 101 | LCD_DELAY; // wait |
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| 102 | sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line |
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| 103 | LCD_DELAY; // wait |
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| 104 | LCD_DELAY; // wait |
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| 105 | #ifdef LCD_DATA_4BIT // do an extra clock for 4 bit reads |
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| 106 | cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line |
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| 107 | LCD_DELAY; // wait |
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| 108 | LCD_DELAY; // wait |
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| 109 | sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line |
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| 110 | LCD_DELAY; // wait |
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| 111 | LCD_DELAY; // wait |
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| 112 | #endif |
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| 113 | } |
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| 114 | cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line |
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| 115 | // leave data lines in input mode so they can be most easily used for other purposes |
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| 116 | #else |
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| 117 | // memory bus read |
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| 118 | // sbi(MCUCR, SRW); // enable RAM waitstate |
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| 119 | // wait until LCD busy bit goes to zero |
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| 120 | while( (*((volatile unsigned char *) (LCD_CTRL_ADDR))) & (1<<LCD_BUSY) ); |
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| 121 | // cbi(MCUCR, SRW); // disable RAM waitstate |
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| 122 | #endif |
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| 123 | } |
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| 124 | |||
| 125 | void lcdControlWrite(u08 data) |
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| 126 | { |
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| 127 | // write the control byte to the display controller |
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| 128 | #ifdef LCD_PORT_INTERFACE |
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| 129 | lcdBusyWait(); // wait until LCD not busy |
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| 130 | cbi(LCD_CTRL_PORT, LCD_CTRL_RS); // set RS to "control" |
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| 131 | cbi(LCD_CTRL_PORT, LCD_CTRL_RW); // set R/W to "write" |
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| 132 | #ifdef LCD_DATA_4BIT |
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| 133 | // 4 bit write |
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| 134 | sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line |
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| 135 | outb(LCD_DATA_DDR, inb(LCD_DATA_DDR)|0xF0); // set data I/O lines to output (4bit) |
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| 136 | outb(LCD_DATA_POUT, (inb(LCD_DATA_POUT)&0x0F) | (data&0xF0) ); // output data, high 4 bits |
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| 137 | LCD_DELAY; // wait |
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| 138 | LCD_DELAY; // wait |
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| 139 | cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line |
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| 140 | LCD_DELAY; // wait |
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| 141 | LCD_DELAY; // wait |
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| 142 | sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line |
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| 143 | outb(LCD_DATA_POUT, (inb(LCD_DATA_POUT)&0x0F) | (data<<4) ); // output data, low 4 bits |
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| 144 | LCD_DELAY; // wait |
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| 145 | LCD_DELAY; // wait |
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| 146 | cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line |
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| 147 | #else |
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| 148 | // 8 bit write |
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| 149 | sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line |
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| 150 | outb(LCD_DATA_DDR, 0xFF); // set data I/O lines to output (8bit) |
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| 151 | outb(LCD_DATA_POUT, data); // output data, 8bits |
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| 152 | LCD_DELAY; // wait |
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| 153 | LCD_DELAY; // wait |
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| 154 | cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line |
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| 155 | #endif |
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| 156 | // leave data lines in input mode so they can be most easily used for other purposes |
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| 157 | #ifdef LCD_DATA_4BIT |
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| 158 | outb(LCD_DATA_DDR, inb(LCD_DATA_DDR)&0x0F); // set data I/O lines to input (4bit) |
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| 159 | outb(LCD_DATA_POUT, inb(LCD_DATA_POUT)|0xF0); // set pull-ups to on (4bit) |
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| 160 | #else |
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| 161 | outb(LCD_DATA_DDR, 0x00); // set data I/O lines to input (8bit) |
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| 162 | outb(LCD_DATA_POUT, 0xFF); // set pull-ups to on (8bit) |
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| 163 | #endif |
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| 164 | #else |
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| 165 | // memory bus write |
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| 166 | //sbi(MCUCR, SRW); // enable RAM waitstate |
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| 167 | lcdBusyWait(); // wait until LCD not busy |
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| 168 | *((volatile unsigned char *) (LCD_CTRL_ADDR)) = data; |
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| 169 | //cbi(MCUCR, SRW); // disable RAM waitstate |
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| 170 | #endif |
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| 171 | } |
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| 172 | |||
| 173 | u08 lcdControlRead(void) |
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| 174 | { |
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| 175 | // read the control byte from the display controller |
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| 176 | register u08 data; |
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| 177 | #ifdef LCD_PORT_INTERFACE |
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| 178 | lcdBusyWait(); // wait until LCD not busy |
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| 179 | #ifdef LCD_DATA_4BIT |
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| 180 | outb(LCD_DATA_DDR, inb(LCD_DATA_DDR)&0x0F); // set data I/O lines to input (4bit) |
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| 181 | outb(LCD_DATA_POUT, inb(LCD_DATA_POUT)|0xF0); // set pull-ups to on (4bit) |
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| 182 | #else |
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| 183 | outb(LCD_DATA_DDR, 0x00); // set data I/O lines to input (8bit) |
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| 184 | outb(LCD_DATA_POUT, 0xFF); // set pull-ups to on (8bit) |
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| 185 | #endif |
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| 186 | cbi(LCD_CTRL_PORT, LCD_CTRL_RS); // set RS to "control" |
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| 187 | sbi(LCD_CTRL_PORT, LCD_CTRL_RW); // set R/W to "read" |
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| 188 | #ifdef LCD_DATA_4BIT |
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| 189 | // 4 bit read |
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| 190 | sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line |
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| 191 | LCD_DELAY; // wait |
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| 192 | LCD_DELAY; // wait |
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| 193 | data = inb(LCD_DATA_PIN)&0xF0; // input data, high 4 bits |
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| 194 | cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line |
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| 195 | LCD_DELAY; // wait |
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| 196 | LCD_DELAY; // wait |
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| 197 | sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line |
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| 198 | LCD_DELAY; // wait |
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| 199 | LCD_DELAY; // wait |
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| 200 | data |= inb(LCD_DATA_PIN)>>4; // input data, low 4 bits |
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| 201 | cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line |
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| 202 | #else |
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| 203 | // 8 bit read |
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| 204 | sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line |
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| 205 | LCD_DELAY; // wait |
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| 206 | LCD_DELAY; // wait |
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| 207 | data = inb(LCD_DATA_PIN); // input data, 8bits |
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| 208 | cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line |
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| 209 | #endif |
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| 210 | // leave data lines in input mode so they can be most easily used for other purposes |
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| 211 | #else |
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| 212 | //sbi(MCUCR, SRW); // enable RAM waitstate |
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| 213 | lcdBusyWait(); // wait until LCD not busy |
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| 214 | data = *((volatile unsigned char *) (LCD_CTRL_ADDR)); |
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| 215 | //cbi(MCUCR, SRW); // disable RAM waitstate |
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| 216 | #endif |
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| 217 | return data; |
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| 218 | } |
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| 219 | |||
| 220 | void lcdDataWrite(u08 data) |
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| 221 | { |
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| 222 | // write a data byte to the display |
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| 223 | #ifdef LCD_PORT_INTERFACE |
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| 224 | lcdBusyWait(); // wait until LCD not busy |
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| 225 | sbi(LCD_CTRL_PORT, LCD_CTRL_RS); // set RS to "data" |
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| 226 | cbi(LCD_CTRL_PORT, LCD_CTRL_RW); // set R/W to "write" |
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| 227 | #ifdef LCD_DATA_4BIT |
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| 228 | // 4 bit write |
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| 229 | sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line |
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| 230 | outb(LCD_DATA_DDR, inb(LCD_DATA_DDR)|0xF0); // set data I/O lines to output (4bit) |
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| 231 | outb(LCD_DATA_POUT, (inb(LCD_DATA_POUT)&0x0F) | (data&0xF0) ); // output data, high 4 bits |
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| 232 | LCD_DELAY; // wait |
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| 233 | LCD_DELAY; // wait |
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| 234 | cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line |
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| 235 | LCD_DELAY; // wait |
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| 236 | LCD_DELAY; // wait |
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| 237 | sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line |
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| 238 | outb(LCD_DATA_POUT, (inb(LCD_DATA_POUT)&0x0F) | (data<<4) ); // output data, low 4 bits |
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| 239 | LCD_DELAY; // wait |
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| 240 | LCD_DELAY; // wait |
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| 241 | cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line |
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| 242 | #else |
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| 243 | // 8 bit write |
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| 244 | sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line |
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| 245 | outb(LCD_DATA_DDR, 0xFF); // set data I/O lines to output (8bit) |
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| 246 | outb(LCD_DATA_POUT, data); // output data, 8bits |
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| 247 | LCD_DELAY; // wait |
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| 248 | LCD_DELAY; // wait |
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| 249 | cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line |
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| 250 | #endif |
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| 251 | // leave data lines in input mode so they can be most easily used for other purposes |
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| 252 | #ifdef LCD_DATA_4BIT |
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| 253 | outb(LCD_DATA_DDR, inb(LCD_DATA_DDR)&0x0F); // set data I/O lines to input (4bit) |
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| 254 | outb(LCD_DATA_POUT, inb(LCD_DATA_POUT)|0xF0); // set pull-ups to on (4bit) |
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| 255 | #else |
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| 256 | outb(LCD_DATA_DDR, 0x00); // set data I/O lines to input (8bit) |
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| 257 | outb(LCD_DATA_POUT, 0xFF); // set pull-ups to on (8bit) |
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| 258 | #endif |
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| 259 | #else |
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| 260 | // memory bus write |
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| 261 | //sbi(MCUCR, SRW); // enable RAM waitstate |
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| 262 | lcdBusyWait(); // wait until LCD not busy |
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| 263 | *((volatile unsigned char *) (LCD_DATA_ADDR)) = data; |
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| 264 | //cbi(MCUCR, SRW); // disable RAM waitstate |
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| 265 | #endif |
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| 266 | } |
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| 267 | |||
| 268 | u08 lcdDataRead(void) |
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| 269 | { |
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| 270 | // read a data byte from the display |
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| 271 | register u08 data; |
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| 272 | #ifdef LCD_PORT_INTERFACE |
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| 273 | lcdBusyWait(); // wait until LCD not busy |
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| 274 | #ifdef LCD_DATA_4BIT |
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| 275 | outb(LCD_DATA_DDR, inb(LCD_DATA_DDR)&0x0F); // set data I/O lines to input (4bit) |
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| 276 | outb(LCD_DATA_POUT, inb(LCD_DATA_POUT)|0xF0); // set pull-ups to on (4bit) |
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| 277 | #else |
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| 278 | outb(LCD_DATA_DDR, 0x00); // set data I/O lines to input (8bit) |
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| 279 | outb(LCD_DATA_POUT, 0xFF); // set pull-ups to on (8bit) |
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| 280 | #endif |
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| 281 | sbi(LCD_CTRL_PORT, LCD_CTRL_RS); // set RS to "data" |
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| 282 | sbi(LCD_CTRL_PORT, LCD_CTRL_RW); // set R/W to "read" |
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| 283 | #ifdef LCD_DATA_4BIT |
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| 284 | // 4 bit read |
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| 285 | sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line |
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| 286 | LCD_DELAY; // wait |
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| 287 | LCD_DELAY; // wait |
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| 288 | data = inb(LCD_DATA_PIN)&0xF0; // input data, high 4 bits |
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| 289 | cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line |
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| 290 | LCD_DELAY; // wait |
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| 291 | LCD_DELAY; // wait |
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| 292 | sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line |
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| 293 | LCD_DELAY; // wait |
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| 294 | LCD_DELAY; // wait |
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| 295 | data |= inb(LCD_DATA_PIN)>>4; // input data, low 4 bits |
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| 296 | cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line |
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| 297 | #else |
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| 298 | // 8 bit read |
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| 299 | sbi(LCD_CTRL_PORT, LCD_CTRL_E); // set "E" line |
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| 300 | LCD_DELAY; // wait |
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| 301 | LCD_DELAY; // wait |
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| 302 | data = inb(LCD_DATA_PIN); // input data, 8bits |
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| 303 | cbi(LCD_CTRL_PORT, LCD_CTRL_E); // clear "E" line |
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| 304 | #endif |
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| 305 | // leave data lines in input mode so they can be most easily used for other purposes |
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| 306 | #else |
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| 307 | // memory bus read |
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| 308 | //sbi(MCUCR, SRW); // enable RAM waitstate |
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| 309 | lcdBusyWait(); // wait until LCD not busy |
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| 310 | data = *((volatile unsigned char *) (LCD_DATA_ADDR)); |
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| 311 | //cbi(MCUCR, SRW); // disable RAM waitstate |
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| 312 | #endif |
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| 313 | return data; |
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| 314 | } |
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| 315 | |||
| 316 | |||
| 317 | |||
| 318 | /*************************************************************/ |
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| 319 | /********************* PUBLIC FUNCTIONS **********************/ |
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| 320 | /*************************************************************/ |
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| 321 | |||
| 322 | void lcdInit() |
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| 323 | { |
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| 324 | // initialize hardware |
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| 325 | lcdInitHW(); |
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| 326 | // LCD function set |
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| 327 | lcdControlWrite(LCD_FUNCTION_DEFAULT); |
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| 328 | // clear LCD |
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| 329 | lcdControlWrite(1<<LCD_CLR); |
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| 330 | delay(60000); // wait 60ms |
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| 331 | // set entry mode |
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| 332 | lcdControlWrite(1<<LCD_ENTRY_MODE | 1<<LCD_ENTRY_INC); |
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| 333 | // set display to on |
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| 334 | //lcdControlWrite(1<<LCD_ON_CTRL | 1<<LCD_ON_DISPLAY | 1<<LCD_ON_BLINK); |
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| 335 | lcdControlWrite(1<<LCD_ON_CTRL | 1<<LCD_ON_DISPLAY ); |
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| 336 | // move cursor to home |
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| 337 | lcdControlWrite(1<<LCD_HOME); |
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| 338 | // set data address to 0 |
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| 339 | lcdControlWrite(1<<LCD_DDRAM | 0x00); |
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| 340 | |||
| 341 | // load the first 8 custom characters |
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| 342 | lcdLoadCustomChar((u08*)LcdCustomChar,0,0); |
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| 343 | lcdLoadCustomChar((u08*)LcdCustomChar,1,1); |
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| 344 | lcdLoadCustomChar((u08*)LcdCustomChar,2,2); |
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| 345 | lcdLoadCustomChar((u08*)LcdCustomChar,3,3); |
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| 346 | lcdLoadCustomChar((u08*)LcdCustomChar,4,4); |
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| 347 | lcdLoadCustomChar((u08*)LcdCustomChar,5,5); |
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| 348 | lcdLoadCustomChar((u08*)LcdCustomChar,6,6); |
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| 349 | lcdLoadCustomChar((u08*)LcdCustomChar,7,7); |
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| 350 | } |
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| 351 | |||
| 352 | void lcdHome(void) |
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| 353 | { |
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| 354 | // move cursor to home |
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| 355 | lcdControlWrite(1<<LCD_HOME); |
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| 356 | } |
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| 357 | |||
| 358 | void lcdClear(void) |
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| 359 | { |
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| 360 | // clear LCD |
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| 361 | lcdControlWrite(1<<LCD_CLR); |
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| 362 | } |
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| 363 | |||
| 364 | void lcdGotoXY(u08 x, u08 y) |
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| 365 | { |
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| 366 | register u08 DDRAMAddr; |
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| 367 | |||
| 368 | // remap lines into proper order |
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| 369 | switch(y) |
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| 370 | { |
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| 371 | case 0: DDRAMAddr = LCD_LINE0_DDRAMADDR+x; break; |
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| 372 | case 1: DDRAMAddr = LCD_LINE1_DDRAMADDR+x; break; |
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| 373 | case 2: DDRAMAddr = LCD_LINE2_DDRAMADDR+x; break; |
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| 374 | case 3: DDRAMAddr = LCD_LINE3_DDRAMADDR+x; break; |
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| 375 | default: DDRAMAddr = LCD_LINE0_DDRAMADDR+x; |
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| 376 | } |
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| 377 | |||
| 378 | // set data address |
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| 379 | lcdControlWrite(1<<LCD_DDRAM | DDRAMAddr); |
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| 380 | } |
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| 381 | |||
| 382 | void lcdLoadCustomChar(u08* lcdCustomCharArray, u08 romCharNum, u08 lcdCharNum) |
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| 383 | { |
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| 384 | register u08 i; |
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| 385 | u08 saveDDRAMAddr; |
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| 386 | |||
| 387 | // backup the current cursor position |
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| 388 | saveDDRAMAddr = lcdControlRead() & 0x7F; |
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| 389 | |||
| 390 | // multiply the character index by 8 |
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| 391 | lcdCharNum = (lcdCharNum<<3); // each character occupies 8 bytes |
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| 392 | romCharNum = (romCharNum<<3); // each character occupies 8 bytes |
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| 393 | |||
| 394 | // copy the 8 bytes into CG (character generator) RAM |
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| 395 | for(i=0; i<8; i++) |
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| 396 | { |
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| 397 | // set CG RAM address |
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| 398 | lcdControlWrite((1<<LCD_CGRAM) | (lcdCharNum+i)); |
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| 399 | // write character data |
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| 400 | lcdDataWrite( pgm_read_byte(lcdCustomCharArray+romCharNum+i) ); |
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| 401 | } |
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| 402 | |||
| 403 | // restore the previous cursor position |
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| 404 | lcdControlWrite(1<<LCD_DDRAM | saveDDRAMAddr); |
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| 405 | |||
| 406 | } |
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| 407 | |||
| 408 | void lcdPrintData(char* data, u08 nBytes) |
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| 409 | { |
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| 410 | register u08 i; |
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| 411 | |||
| 412 | // check to make sure we have a good pointer |
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| 413 | if (!data) return; |
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| 414 | |||
| 415 | // print data |
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| 416 | for(i=0; i<nBytes; i++) |
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| 417 | { |
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| 418 | lcdDataWrite(data[i]); |
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| 419 | } |
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| 420 | } |
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| 421 | |||
| 422 | void lcdProgressBar(u16 progress, u16 maxprogress, u08 length) |
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| 423 | { |
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| 424 | u08 i; |
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| 425 | u32 pixelprogress; |
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| 426 | u08 c; |
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| 427 | |||
| 428 | // draw a progress bar displaying (progress / maxprogress) |
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| 429 | // starting from the current cursor position |
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| 430 | // with a total length of "length" characters |
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| 431 | // ***note, LCD chars 0-5 must be programmed as the bar characters |
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| 432 | // char 0 = empty ... char 5 = full |
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| 433 | |||
| 434 | // total pixel length of bargraph equals length*PROGRESSPIXELS_PER_CHAR; |
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| 435 | // pixel length of bar itself is |
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| 436 | pixelprogress = ((progress*(length*PROGRESSPIXELS_PER_CHAR))/maxprogress); |
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| 437 | |||
| 438 | // print exactly "length" characters |
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| 439 | for(i=0; i<length; i++) |
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| 440 | { |
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| 441 | // check if this is a full block, or partial or empty |
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| 442 | // (u16) cast is needed to avoid sign comparison warning |
||
| 443 | if( ((i*(u16)PROGRESSPIXELS_PER_CHAR)+5) > pixelprogress ) |
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| 444 | { |
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| 445 | // this is a partial or empty block |
||
| 446 | if( ((i*(u16)PROGRESSPIXELS_PER_CHAR)) > pixelprogress ) |
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| 447 | { |
||
| 448 | // this is an empty block |
||
| 449 | // use space character? |
||
| 450 | c = 0; |
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| 451 | } |
||
| 452 | else |
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| 453 | { |
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| 454 | // this is a partial block |
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| 455 | c = pixelprogress % PROGRESSPIXELS_PER_CHAR; |
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| 456 | } |
||
| 457 | } |
||
| 458 | else |
||
| 459 | { |
||
| 460 | // this is a full block |
||
| 461 | c = 5; |
||
| 462 | } |
||
| 463 | |||
| 464 | // write character to display |
||
| 465 | lcdDataWrite(c); |
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| 466 | } |
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| 467 | |||
| 468 | } |
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| 469 |
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