| Line No. | Rev | Author | Line |
|---|---|---|---|
| 1 | 6 | kaklik | /*! \file ks0108.c \brief Graphic LCD driver for HD61202/KS0108 displays. */ |
| 2 | //***************************************************************************** |
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| 3 | // |
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| 4 | // File Name : 'ks0108.c' |
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| 5 | // Title : Graphic LCD driver for HD61202/KS0108 displays |
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| 6 | // Author : Pascal Stang - Copyright (C) 2001-2003 |
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| 7 | // Date : 10/19/2002 |
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| 8 | // Revised : 5/5/2003 |
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| 9 | // Version : 0.5 |
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| 10 | // Target MCU : Atmel AVR |
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| 11 | // Editor Tabs : 4 |
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| 12 | // |
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| 13 | // NOTE: This code is currently below version 1.0, and therefore is considered |
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| 14 | // to be lacking in some functionality or documentation, or may not be fully |
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| 15 | // tested. Nonetheless, you can expect most functions to work. |
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| 16 | // |
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| 17 | // This code is distributed under the GNU Public License |
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| 18 | // which can be found at http://www.gnu.org/licenses/gpl.txt |
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| 19 | // |
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| 20 | //***************************************************************************** |
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| 21 | |||
| 22 | #ifndef WIN32 |
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| 23 | // AVR specific includes |
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| 24 | #include <avr/io.h> |
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| 25 | #include <avr/interrupt.h> |
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| 26 | #endif |
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| 27 | |||
| 28 | #include "global.h" |
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| 29 | #include "ks0108.h" |
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| 30 | |||
| 31 | // global variables |
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| 32 | GrLcdStateType GrLcdState; |
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| 33 | |||
| 34 | /*************************************************************/ |
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| 35 | /********************** LOCAL FUNCTIONS **********************/ |
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| 36 | /*************************************************************/ |
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| 37 | |||
| 38 | void glcdInitHW(void) |
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| 39 | { |
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| 40 | // initialize I/O ports |
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| 41 | // if I/O interface is in use |
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| 42 | #ifdef GLCD_PORT_INTERFACE |
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| 43 | |||
| 44 | //TODO: make setup of chip select lines contingent on how |
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| 45 | // many controllers are actually in the display |
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| 46 | |||
| 47 | // initialize LCD control lines levels |
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| 48 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_RS); |
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| 49 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_RW); |
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| 50 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_E); |
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| 51 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_CS0); |
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| 52 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_CS1); |
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| 53 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_CS2); |
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| 54 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_CS3); |
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| 55 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_RESET); |
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| 56 | // initialize LCD control port to output |
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| 57 | sbi(GLCD_CTRL_DDR, GLCD_CTRL_RS); |
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| 58 | sbi(GLCD_CTRL_DDR, GLCD_CTRL_RW); |
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| 59 | sbi(GLCD_CTRL_DDR, GLCD_CTRL_E); |
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| 60 | sbi(GLCD_CTRL_DDR, GLCD_CTRL_CS0); |
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| 61 | sbi(GLCD_CTRL_DDR, GLCD_CTRL_CS1); |
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| 62 | sbi(GLCD_CTRL_DDR, GLCD_CTRL_CS2); |
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| 63 | sbi(GLCD_CTRL_DDR, GLCD_CTRL_CS3); |
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| 64 | sbi(GLCD_CTRL_DDR, GLCD_CTRL_RESET); |
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| 65 | // initialize LCD data |
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| 66 | outb(GLCD_DATA_PORT, 0x00); |
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| 67 | // initialize LCD data port to output |
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| 68 | outb(GLCD_DATA_DDR, 0xFF); |
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| 69 | #endif |
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| 70 | } |
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| 71 | |||
| 72 | void glcdControllerSelect(u08 controller) |
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| 73 | { |
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| 74 | #ifdef GLCD_PORT_INTERFACE |
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| 75 | //TODO: make control of chip select lines contingent on how |
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| 76 | // many controllers are actually in the display |
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| 77 | |||
| 78 | // unselect all controllers |
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| 79 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_CS0); |
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| 80 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_CS1); |
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| 81 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_CS2); |
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| 82 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_CS3); |
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| 83 | |||
| 84 | // select requested controller |
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| 85 | switch(controller) |
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| 86 | { |
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| 87 | case 0: sbi(GLCD_CTRL_PORT, GLCD_CTRL_CS0); break; |
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| 88 | case 1: sbi(GLCD_CTRL_PORT, GLCD_CTRL_CS1); break; |
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| 89 | case 2: sbi(GLCD_CTRL_PORT, GLCD_CTRL_CS2); break; |
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| 90 | case 3: sbi(GLCD_CTRL_PORT, GLCD_CTRL_CS3); break; |
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| 91 | default: break; |
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| 92 | } |
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| 93 | #endif |
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| 94 | } |
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| 95 | |||
| 96 | void glcdBusyWait(u08 controller) |
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| 97 | { |
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| 98 | #ifdef GLCD_PORT_INTERFACE |
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| 99 | cli(); |
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| 100 | // wait until LCD busy bit goes to zero |
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| 101 | // select the controller chip |
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| 102 | glcdControllerSelect(controller); |
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| 103 | // do a read from control register |
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| 104 | outb(GLCD_DATA_PORT, 0xFF); |
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| 105 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_RS); |
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| 106 | outb(GLCD_DATA_DDR, 0x00); |
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| 107 | sbi(GLCD_CTRL_PORT, GLCD_CTRL_RW); |
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| 108 | sbi(GLCD_CTRL_PORT, GLCD_CTRL_E); |
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| 109 | asm volatile ("nop"); asm volatile ("nop"); |
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| 110 | while(inb(GLCD_DATA_PIN) & GLCD_STATUS_BUSY) |
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| 111 | { |
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| 112 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_E); |
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| 113 | asm volatile ("nop"); asm volatile ("nop"); |
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| 114 | asm volatile ("nop"); asm volatile ("nop"); |
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| 115 | sbi(GLCD_CTRL_PORT, GLCD_CTRL_E); |
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| 116 | asm volatile ("nop"); asm volatile ("nop"); |
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| 117 | asm volatile ("nop"); asm volatile ("nop"); |
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| 118 | } |
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| 119 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_E); |
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| 120 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_RW); |
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| 121 | outb(GLCD_DATA_DDR, 0xFF); |
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| 122 | sei(); |
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| 123 | #else |
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| 124 | // sbi(MCUCR, SRW); // enable RAM waitstate |
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| 125 | // wait until LCD busy bit goes to zero |
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| 126 | while(*(volatile unsigned char *) |
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| 127 | (GLCD_CONTROLLER0_CTRL_ADDR + GLCD_CONTROLLER_ADDR_OFFSET*controller) & GLCD_STATUS_BUSY); |
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| 128 | // cbi(MCUCR, SRW); // disable RAM waitstate |
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| 129 | #endif |
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| 130 | } |
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| 131 | |||
| 132 | void glcdControlWrite(u08 controller, u08 data) |
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| 133 | { |
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| 134 | #ifdef GLCD_PORT_INTERFACE |
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| 135 | cli(); |
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| 136 | glcdBusyWait(controller); // wait until LCD not busy |
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| 137 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_RS); |
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| 138 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_RW); |
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| 139 | sbi(GLCD_CTRL_PORT, GLCD_CTRL_E); |
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| 140 | outb(GLCD_DATA_DDR, 0xFF); |
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| 141 | outb(GLCD_DATA_PORT, data); |
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| 142 | asm volatile ("nop"); asm volatile ("nop"); |
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| 143 | asm volatile ("nop"); asm volatile ("nop"); |
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| 144 | asm volatile ("nop"); asm volatile ("nop"); |
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| 145 | asm volatile ("nop"); asm volatile ("nop"); |
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| 146 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_E); |
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| 147 | sei(); |
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| 148 | #else |
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| 149 | //sbi(MCUCR, SRW); // enable RAM waitstate |
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| 150 | glcdBusyWait(controller); // wait until LCD not busy |
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| 151 | *(volatile unsigned char *) (GLCD_CONTROLLER0_CTRL_ADDR + GLCD_CONTROLLER_ADDR_OFFSET*controller) = data; |
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| 152 | //cbi(MCUCR, SRW); // disable RAM waitstate |
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| 153 | #endif |
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| 154 | } |
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| 155 | |||
| 156 | u08 glcdControlRead(u08 controller) |
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| 157 | { |
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| 158 | register u08 data; |
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| 159 | #ifdef GLCD_PORT_INTERFACE |
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| 160 | cli(); |
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| 161 | glcdBusyWait(controller); // wait until LCD not busy |
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| 162 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_RS); |
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| 163 | outb(GLCD_DATA_DDR, 0x00); |
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| 164 | sbi(GLCD_CTRL_PORT, GLCD_CTRL_RW); |
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| 165 | sbi(GLCD_CTRL_PORT, GLCD_CTRL_E); |
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| 166 | asm volatile ("nop"); asm volatile ("nop"); |
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| 167 | asm volatile ("nop"); asm volatile ("nop"); |
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| 168 | asm volatile ("nop"); asm volatile ("nop"); |
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| 169 | asm volatile ("nop"); asm volatile ("nop"); |
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| 170 | data = inb(GLCD_DATA_PIN); |
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| 171 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_E); |
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| 172 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_RW); |
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| 173 | outb(GLCD_DATA_DDR, 0xFF); |
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| 174 | sei(); |
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| 175 | #else |
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| 176 | //sbi(MCUCR, SRW); // enable RAM waitstate |
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| 177 | glcdBusyWait(controller); // wait until LCD not busy |
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| 178 | data = *(volatile unsigned char *) (GLCD_CONTROLLER0_CTRL_ADDR + GLCD_CONTROLLER_ADDR_OFFSET*controller); |
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| 179 | //cbi(MCUCR, SRW); // disable RAM waitstate |
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| 180 | #endif |
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| 181 | return data; |
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| 182 | } |
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| 183 | |||
| 184 | void glcdDataWrite(u08 data) |
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| 185 | { |
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| 186 | register u08 controller = (GrLcdState.lcdXAddr/GLCD_CONTROLLER_XPIXELS); |
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| 187 | #ifdef GLCD_PORT_INTERFACE |
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| 188 | cli(); |
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| 189 | glcdBusyWait(controller); // wait until LCD not busy |
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| 190 | sbi(GLCD_CTRL_PORT, GLCD_CTRL_RS); |
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| 191 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_RW); |
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| 192 | sbi(GLCD_CTRL_PORT, GLCD_CTRL_E); |
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| 193 | outb(GLCD_DATA_DDR, 0xFF); |
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| 194 | outb(GLCD_DATA_PORT, data); |
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| 195 | asm volatile ("nop"); asm volatile ("nop"); |
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| 196 | asm volatile ("nop"); asm volatile ("nop"); |
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| 197 | asm volatile ("nop"); asm volatile ("nop"); |
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| 198 | asm volatile ("nop"); asm volatile ("nop"); |
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| 199 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_E); |
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| 200 | sei(); |
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| 201 | #else |
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| 202 | //sbi(MCUCR, SRW); // enable RAM waitstate |
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| 203 | glcdBusyWait(controller); // wait until LCD not busy |
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| 204 | *(volatile unsigned char *) (GLCD_CONTROLLER0_CTRL_ADDR + GLCD_CONTROLLER_ADDR_OFFSET*controller) = data; |
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| 205 | //cbi(MCUCR, SRW); // disable RAM waitstate |
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| 206 | #endif |
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| 207 | // increment our local address counter |
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| 208 | GrLcdState.ctrlr[controller].xAddr++; |
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| 209 | GrLcdState.lcdXAddr++; |
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| 210 | if(GrLcdState.lcdXAddr >= GLCD_XPIXELS) |
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| 211 | { |
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| 212 | GrLcdState.lcdYAddr++; |
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| 213 | glcdSetYAddress(GrLcdState.lcdYAddr); |
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| 214 | glcdSetXAddress(0); |
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| 215 | } |
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| 216 | } |
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| 217 | |||
| 218 | u08 glcdDataRead(void) |
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| 219 | { |
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| 220 | register u08 data; |
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| 221 | register u08 controller = (GrLcdState.lcdXAddr/GLCD_CONTROLLER_XPIXELS); |
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| 222 | #ifdef GLCD_PORT_INTERFACE |
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| 223 | cli(); |
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| 224 | glcdBusyWait(controller); // wait until LCD not busy |
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| 225 | sbi(GLCD_CTRL_PORT, GLCD_CTRL_RS); |
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| 226 | outb(GLCD_DATA_DDR, 0x00); |
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| 227 | sbi(GLCD_CTRL_PORT, GLCD_CTRL_RW); |
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| 228 | sbi(GLCD_CTRL_PORT, GLCD_CTRL_E); |
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| 229 | asm volatile ("nop"); asm volatile ("nop"); |
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| 230 | asm volatile ("nop"); asm volatile ("nop"); |
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| 231 | asm volatile ("nop"); asm volatile ("nop"); |
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| 232 | asm volatile ("nop"); asm volatile ("nop"); |
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| 233 | data = inb(GLCD_DATA_PIN); |
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| 234 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_E); |
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| 235 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_RW); |
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| 236 | sei(); |
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| 237 | #else |
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| 238 | //sbi(MCUCR, SRW); // enable RAM waitstate |
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| 239 | glcdBusyWait(controller); // wait until LCD not busy |
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| 240 | data = *(volatile unsigned char *) (GLCD_CONTROLLER0_CTRL_ADDR + GLCD_CONTROLLER_ADDR_OFFSET*controller); |
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| 241 | //cbi(MCUCR, SRW); // disable RAM waitstate |
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| 242 | #endif |
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| 243 | // increment our local address counter |
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| 244 | GrLcdState.ctrlr[controller].xAddr++; |
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| 245 | GrLcdState.lcdXAddr++; |
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| 246 | if(GrLcdState.lcdXAddr >= GLCD_XPIXELS) |
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| 247 | { |
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| 248 | GrLcdState.lcdYAddr++; |
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| 249 | glcdSetYAddress(GrLcdState.lcdYAddr); |
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| 250 | glcdSetXAddress(0); |
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| 251 | } |
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| 252 | return data; |
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| 253 | } |
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| 254 | |||
| 255 | void glcdReset(u08 resetState) |
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| 256 | { |
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| 257 | // reset lcd if argument is true |
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| 258 | // run lcd if argument is false |
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| 259 | #ifdef GLCD_PORT_INTERFACE |
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| 260 | if(resetState) |
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| 261 | cbi(GLCD_CTRL_PORT, GLCD_CTRL_RESET); |
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| 262 | else |
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| 263 | sbi(GLCD_CTRL_PORT, GLCD_CTRL_RESET); |
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| 264 | #endif |
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| 265 | } |
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| 266 | |||
| 267 | void glcdSetXAddress(u08 xAddr) |
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| 268 | { |
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| 269 | u08 i; |
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| 270 | // record address change locally |
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| 271 | GrLcdState.lcdXAddr = xAddr; |
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| 272 | |||
| 273 | // clear y (col) address on all controllers |
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| 274 | for(i=0; i<GLCD_NUM_CONTROLLERS; i++) |
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| 275 | { |
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| 276 | glcdControlWrite(i, GLCD_SET_Y_ADDR | 0x00); |
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| 277 | GrLcdState.ctrlr[i].xAddr = 0; |
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| 278 | } |
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| 279 | |||
| 280 | // set y (col) address on destination controller |
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| 281 | glcdControlWrite((GrLcdState.lcdXAddr/GLCD_CONTROLLER_XPIXELS), |
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| 282 | GLCD_SET_Y_ADDR | (GrLcdState.lcdXAddr & 0x3F)); |
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| 283 | } |
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| 284 | |||
| 285 | void glcdSetYAddress(u08 yAddr) |
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| 286 | { |
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| 287 | u08 i; |
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| 288 | // record address change locally |
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| 289 | GrLcdState.lcdYAddr = yAddr; |
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| 290 | // set page address for all controllers |
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| 291 | for(i=0; i<GLCD_NUM_CONTROLLERS; i++) |
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| 292 | { |
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| 293 | glcdControlWrite(i, GLCD_SET_PAGE | yAddr); |
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| 294 | } |
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| 295 | } |
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| 296 | |||
| 297 | /*************************************************************/ |
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| 298 | /********************* PUBLIC FUNCTIONS **********************/ |
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| 299 | /*************************************************************/ |
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| 300 | |||
| 301 | void glcdInit() |
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| 302 | { |
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| 303 | u08 i; |
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| 304 | // initialize hardware |
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| 305 | glcdInitHW(); |
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| 306 | // bring lcd out of reset |
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| 307 | glcdReset(FALSE); |
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| 308 | // Turn on LCD |
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| 309 | for(i=0; i<GLCD_NUM_CONTROLLERS; i++) |
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| 310 | { |
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| 311 | glcdControlWrite(i, GLCD_ON_CTRL | GLCD_ON_DISPLAY); |
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| 312 | } |
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| 313 | // clear lcd |
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| 314 | glcdClearScreen(); |
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| 315 | // initialize positions |
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| 316 | glcdHome(); |
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| 317 | } |
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| 318 | |||
| 319 | void glcdHome(void) |
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| 320 | { |
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| 321 | u08 i; |
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| 322 | // initialize addresses/positions |
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| 323 | glcdStartLine(0); |
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| 324 | glcdSetAddress(0,0); |
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| 325 | // initialize local data structures |
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| 326 | for(i=0; i<GLCD_NUM_CONTROLLERS; i++) |
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| 327 | { |
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| 328 | GrLcdState.ctrlr[i].xAddr = 0; |
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| 329 | GrLcdState.ctrlr[i].yAddr = 0; |
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| 330 | } |
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| 331 | } |
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| 332 | |||
| 333 | void glcdClearScreen(void) |
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| 334 | { |
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| 335 | u08 pageAddr; |
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| 336 | u08 xAddr; |
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| 337 | |||
| 338 | // clear LCD |
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| 339 | // loop through all pages |
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| 340 | for(pageAddr=0; pageAddr<(GLCD_YPIXELS>>3); pageAddr++) |
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| 341 | { |
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| 342 | // set page address |
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| 343 | glcdSetAddress(0, pageAddr); |
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| 344 | // clear all lines of this page of display memory |
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| 345 | for(xAddr=0; xAddr<GLCD_XPIXELS; xAddr++) |
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| 346 | { |
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| 347 | glcdDataWrite(0x00); |
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| 348 | } |
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| 349 | } |
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| 350 | } |
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| 351 | |||
| 352 | void glcdStartLine(u08 start) |
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| 353 | { |
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| 354 | glcdControlWrite(0, GLCD_START_LINE | start); |
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| 355 | glcdControlWrite(1, GLCD_START_LINE | start); |
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| 356 | } |
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| 357 | |||
| 358 | void glcdSetAddress(u08 x, u08 yLine) |
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| 359 | { |
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| 360 | // set addresses |
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| 361 | glcdSetYAddress(yLine); |
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| 362 | glcdSetXAddress(x); |
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| 363 | } |
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| 364 | |||
| 365 | void glcdGotoChar(u08 line, u08 col) |
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| 366 | { |
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| 367 | glcdSetAddress(col*6, line); |
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| 368 | } |
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| 369 | |||
| 370 | void glcdDelay(u16 p) // 1-8us ...2-13us ...5-31us |
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| 371 | { // 10-60us ...50-290us |
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| 372 | unsigned int i; // 100-580us ...500-2,9ms |
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| 373 | unsigned char j; // 1000-5,8ms ...5000-29ms |
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| 374 | // 10000-56ms ...30000-170ms |
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| 375 | // 50000-295ms...60000-345ms |
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| 376 | // for (i = 0; i < p; i++) for (j = 0; j < 10; j++) asm volatile ("nop"); |
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| 377 | for (i = 0; i < p; i++) for (j = 0; j < 10; j++); |
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| 378 | } |
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| 379 | |||
| 380 | |||
| 381 | // Higher level functionality has been moved to the API-layer glcd.c/glcd.h |
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