/***************************************************************************/ /* Rabbit_RCM3720_to_HD44780LCD_example4.c http://www.frank4dd.com/howto */ /* */ /* Written for a 16x2 HD44780 compatible LCD display on a Rabbit RCM3720 */ /* Ethernet Development Kit. All 8bits are connected but we are going to */ /* send in 4bit mode. We are using port A, keeping the datalines on port */ /* A0 - A3 to Low. RS, E and R/W are connected to Port B on B2, B3 and B4. */ /* Written and tested under Dynamic C Version 9.21 Frank4dd, @2008 */ /***************************************************************************/ #class auto #define RSADDR 2 // Register Select port B bit 2 #define ENADDR 3 // Enable signal port B bit 3 #define RWADDR 4 // Read/Write signal port B bit 4 #define DISPLAYSIZE 16 // The length of the LCD display void ByteSplit(char byte, int bits[8]) { int i; int j; j=0; for(i=128; i>0; i=i/2) { if ((byte & i) != 0) bits[j] = 1; if ((byte & i) == 0) bits[j] = 0; if (j == 7) break; else j++; } } void SetPortAOut() { WrPortI(SPCR, NULL, 0x84); // Set Rabbit port A to output WrPortI(PADR, &PADRShadow, 0x0); // Set all bits of port A to '1' } void MsDelay(unsigned long milliSeconds) { unsigned long ul0; ul0 = MS_TIMER; // get the current timer value while(MS_TIMER < ul0 + milliSeconds); } void pause(unsigned long seconds) { MsDelay(seconds*1000); // multiply sec with 1000 for ms } Lcd4bitInit() { BitWrPortI(PBDR, &PBDRShadow, 0, RSADDR); // Set command mode BitWrPortI(PBDR, &PBDRShadow, 0, RWADDR); // Set LCD write mode BitWrPortI(PADR, &PADRShadow, 1, 4); // Set port A-4 BitWrPortI(PADR, &PADRShadow, 1, 5); // Set port A-5 BitWrPortI(PADR, &PADRShadow, 0, 6); // Set port A-6 BitWrPortI(PADR, &PADRShadow, 0, 7); // Set port A-7 MsDelay(1); BitWrPortI(PBDR, &PBDRShadow, 1, ENADDR); // Start sending data upper 4 bit MsDelay(1); // Wait 1 ms for LCD to read BitWrPortI(PBDR, &PBDRShadow, 0, ENADDR); // Finish transmission upper 4 bit MsDelay(5); BitWrPortI(PADR, &PADRShadow, 1, 4); // Set port A-4 BitWrPortI(PADR, &PADRShadow, 1, 5); // Set port A-5 BitWrPortI(PADR, &PADRShadow, 0, 6); // Set port A-6 BitWrPortI(PADR, &PADRShadow, 0, 7); // Set port A-7 MsDelay(1); BitWrPortI(PBDR, &PBDRShadow, 1, ENADDR); // Start sending data upper 4 bit MsDelay(1); // Wait 1 ms for LCD to read BitWrPortI(PBDR, &PBDRShadow, 0, ENADDR); // Finish transmission upper 4 bit MsDelay(1); BitWrPortI(PADR, &PADRShadow, 1, 4); // Set port A-4 BitWrPortI(PADR, &PADRShadow, 1, 5); // Set port A-5 BitWrPortI(PADR, &PADRShadow, 0, 6); // Set port A-6 BitWrPortI(PADR, &PADRShadow, 0, 7); // Set port A-7 MsDelay(1); BitWrPortI(PBDR, &PBDRShadow, 1, ENADDR); // Start sending data upper 4 bit MsDelay(1); // Wait 1 ms for LCD to read BitWrPortI(PBDR, &PBDRShadow, 0, ENADDR); // Finish transmission upper 4 bit MsDelay(1); BitWrPortI(PADR, &PADRShadow, 0, 4); // Set port A-4 BitWrPortI(PADR, &PADRShadow, 1, 5); // Set port A-5 BitWrPortI(PADR, &PADRShadow, 0, 6); // Set port A-6 BitWrPortI(PADR, &PADRShadow, 0, 7); // Set port A-7 MsDelay(1); BitWrPortI(PBDR, &PBDRShadow, 1, ENADDR); // Start sending data upper 4 bit MsDelay(1); // Wait 1 ms for LCD to read BitWrPortI(PBDR, &PBDRShadow, 0, ENADDR); // Finish transmission upper 4 bit MsDelay(1); } LcdCommandWr(char hex) { int cmdbits[8]; BitWrPortI(PBDR, &PBDRShadow, 0, RSADDR); // Set LCD command mode BitWrPortI(PBDR, &PBDRShadow, 0, RWADDR); // Set LCD write mode // we need to split the 8 bits in half and transmit upper 4 bits, // then the lower 4 bits. ByteSplit(hex, cmdbits); BitWrPortI(PADR, &PADRShadow, cmdbits[3], 4); // Set port A bit 4 BitWrPortI(PADR, &PADRShadow, cmdbits[2], 5); // Set port A bit 5 BitWrPortI(PADR, &PADRShadow, cmdbits[1], 6); // Set port A bit 6 BitWrPortI(PADR, &PADRShadow, cmdbits[0], 7); // Set port A bit 7 MsDelay(1); BitWrPortI(PBDR, &PBDRShadow, 1, ENADDR); // Start sending data upper 4 bit MsDelay(1); // Wait 1 ms for LCD to read BitWrPortI(PBDR, &PBDRShadow, 0, ENADDR); // Finish transmission upper 4 bit MsDelay(1); BitWrPortI(PADR, &PADRShadow, cmdbits[7], 4); // Set port A bit 4 BitWrPortI(PADR, &PADRShadow, cmdbits[6], 5); // Set port A bit 5 BitWrPortI(PADR, &PADRShadow, cmdbits[5], 6); // Set port A bit 6 BitWrPortI(PADR, &PADRShadow, cmdbits[4], 7); // Set port A bit 7 MsDelay(1); BitWrPortI(PBDR, &PBDRShadow, 1, ENADDR); // Start sending data lower 4 bit MsDelay(1); // Wait 1 ms for LCD to read BitWrPortI(PBDR, &PBDRShadow, 0, ENADDR); // Finish transmission lower 4 bit MsDelay(1); } void Lcd_Config() { LcdCommandWr(0x28); // keep 4bit, set 2 lines, 5x7 font LcdCommandWr(0x06); // Set Entry mode, increment move LcdCommandWr(0x10); // Display and cursor shift LcdCommandWr(0x0E); // Switch display and cursor on LcdCommandWr(0x01); // Clear the LCD and jump to zero } void Lcd_Clear() { LcdCommandWr(0x01); // Clear the LCD and jump to zero } void Lcd_solidCursor_On() { // Switch the LCD on LcdCommandWr(0x0E); // Cursor is a solid underline } void Lcd_noCursor_On() { LcdCommandWr(0x0C); // Switch the LCD on (no cursor) } void Lcd_blinkCursor_On() { // Switch the LCD on LcdCommandWr(0x0F); // Cursor is a blinking square } void Cursor_Home() { LcdCommandWr(0x03); // Cursor back to first position } void Lcd_Off() { LcdCommandWr(0x08); // Switch the LCD display off } #define ASCIITABLESIZE 96 char * AsciiCharLookup(char syschar) { char * lcdCode; char charTable[ASCIITABLESIZE][2]; int i; charTable[0][0] = ' '; charTable[0][1] = 0x20; charTable[1][0] = '!'; charTable[1][1] = 0x21; charTable[2][0] = '"'; charTable[2][1] = 0x22; charTable[3][0] = '#'; charTable[3][1] = 0x23; charTable[4][0] = '$'; charTable[4][1] = 0x24; charTable[5][0] = '%'; charTable[5][1] = 0x25; charTable[6][0] = '&'; charTable[6][1] = 0x26; charTable[7][0] = '\''; charTable[7][1] = 0x27; charTable[8][0] = '('; charTable[8][1] = 0x28; charTable[9][0] = ')'; charTable[9][1] = 0x29; charTable[10][0] = '*'; charTable[10][1] = 0x2A; charTable[11][0] = '+'; charTable[11][1] = 0x2B; charTable[12][0] = ','; charTable[12][1] = 0x2C; charTable[13][0] = '-'; charTable[13][1] = 0x2D; charTable[14][0] = '.'; charTable[14][1] = 0x2E; charTable[15][0] = '/'; charTable[15][1] = 0x2F; charTable[16][0] = '0'; charTable[16][1] = 0x30; charTable[17][0] = '1'; charTable[17][1] = 0x31; charTable[18][0] = '2'; charTable[18][1] = 0x32; charTable[19][0] = '3'; charTable[19][1] = 0x33; charTable[20][0] = '4'; charTable[20][1] = 0x34; charTable[21][0] = '5'; charTable[21][1] = 0x35; charTable[22][0] = '6'; charTable[22][1] = 0x36; charTable[23][0] = '7'; charTable[23][1] = 0x37; charTable[24][0] = '8'; charTable[24][1] = 0x38; charTable[25][0] = '9'; charTable[25][1] = 0x39; charTable[26][0] = ':'; charTable[26][1] = 0x3A; charTable[27][0] = ';'; charTable[27][1] = 0x3B; charTable[28][0] = '<'; charTable[28][1] = 0x3C; charTable[29][0] = '='; charTable[29][1] = 0x3D; charTable[30][0] = '>'; charTable[30][1] = 0x3E; charTable[31][0] = '?'; charTable[31][1] = 0x3F; charTable[32][0] = '@'; charTable[32][1] = 0x40; charTable[33][0] = 'A'; charTable[33][1] = 0x41; charTable[34][0] = 'B'; charTable[34][1] = 0x42; charTable[35][0] = 'C'; charTable[35][1] = 0x43; charTable[36][0] = 'D'; charTable[36][1] = 0x44; charTable[37][0] = 'E'; charTable[37][1] = 0x45; charTable[38][0] = 'F'; charTable[38][1] = 0x46; charTable[39][0] = 'G'; charTable[39][1] = 0x47; charTable[40][0] = 'H'; charTable[40][1] = 0x48; charTable[41][0] = 'I'; charTable[41][1] = 0x49; charTable[42][0] = 'J'; charTable[42][1] = 0x4A; charTable[43][0] = 'K'; charTable[43][1] = 0x4B; charTable[44][0] = 'L'; charTable[44][1] = 0x4C; charTable[45][0] = 'M'; charTable[45][1] = 0x4D; charTable[46][0] = 'N'; charTable[46][1] = 0x4E; charTable[47][0] = 'O'; charTable[47][1] = 0x4F; charTable[48][0] = 'P'; charTable[48][1] = 0x50; charTable[49][0] = 'Q'; charTable[49][1] = 0x51; charTable[50][0] = 'R'; charTable[50][1] = 0x52; charTable[51][0] = 'S'; charTable[51][1] = 0x53; charTable[52][0] = 'T'; charTable[52][1] = 0x54; charTable[53][0] = 'U'; charTable[53][1] = 0x55; charTable[54][0] = 'V'; charTable[54][1] = 0x56; charTable[55][0] = 'W'; charTable[55][1] = 0x57; charTable[56][0] = 'X'; charTable[56][1] = 0x58; charTable[57][0] = 'Y'; charTable[57][1] = 0x59; charTable[58][0] = 'Z'; charTable[58][1] = 0x5A; charTable[59][0] = '['; charTable[59][1] = 0x5B; charTable[60][0] = ' '; charTable[60][1] = 0x5C; // The Yen currency symbol charTable[61][0] = ']'; charTable[61][1] = 0x5D; charTable[62][0] = '^'; charTable[62][1] = 0x5E; charTable[63][0] = '_'; charTable[63][1] = 0x5F; charTable[64][0] = '\\'; charTable[64][1] = 0x60; charTable[65][0] = 'a'; charTable[65][1] = 0x61; charTable[66][0] = 'b'; charTable[66][1] = 0x62; charTable[67][0] = 'c'; charTable[67][1] = 0x63; charTable[68][0] = 'd'; charTable[68][1] = 0x64; charTable[69][0] = 'e'; charTable[69][1] = 0x65; charTable[70][0] = 'f'; charTable[70][1] = 0x66; charTable[71][0] = 'g'; charTable[71][1] = 0x67; charTable[72][0] = 'h'; charTable[72][1] = 0x68; charTable[73][0] = 'i'; charTable[73][1] = 0x69; charTable[74][0] = 'j'; charTable[74][1] = 0x6A; charTable[75][0] = 'k'; charTable[75][1] = 0x6B; charTable[76][0] = 'l'; charTable[76][1] = 0x6C; charTable[77][0] = 'm'; charTable[77][1] = 0x6D; charTable[78][0] = 'n'; charTable[78][1] = 0x6E; charTable[79][0] = 'o'; charTable[79][1] = 0x6F; charTable[80][0] = 'p'; charTable[80][1] = 0x70; charTable[81][0] = 'q'; charTable[81][1] = 0x71; charTable[82][0] = 'r'; charTable[82][1] = 0x72; charTable[83][0] = 's'; charTable[83][1] = 0x73; charTable[84][0] = 't'; charTable[84][1] = 0x74; charTable[85][0] = 'u'; charTable[85][1] = 0x75; charTable[86][0] = 'v'; charTable[86][1] = 0x76; charTable[87][0] = 'w'; charTable[87][1] = 0x77; charTable[88][0] = 'x'; charTable[88][1] = 0x78; charTable[89][0] = 'y'; charTable[89][1] = 0x79; charTable[90][0] = 'z'; charTable[90][1] = 0x7A; charTable[91][0] = '{'; charTable[91][1] = 0x7B; charTable[92][0] = '|'; charTable[92][1] = 0x7C; charTable[93][0] = '}'; charTable[93][1] = 0x7D; charTable[94][0] = ' '; charTable[94][1] = 0x7E; // arrow pointing right charTable[95][0] = ' '; charTable[95][1] = 0x7F; // arrow pointing left lcdCode = NULL; for(i=0;i