Paul Evans
Newhaven 320x240 LCD
Diff: newhaven.cpp
- Revision:
- 3:1cf3ec6c70d7
- Parent:
- 2:2058e2f79157
- Child:
- 4:aa6dc362b462
--- a/newhaven.cpp Sun Feb 27 21:40:59 2011 +0000
+++ b/newhaven.cpp Sun Feb 27 23:30:14 2011 +0000
@@ -1,156 +1,155 @@
-/* mbed Newhaven LCD Library
- * Copywrite (c) 2011, Paul Evans
- */
-
-#include "mbed.h"
-#include "newhaven.h"
-
-NHLCD::NHLCD(PinName PIN_E,PinName PIN_RW,PinName PIN_A0,PinName PIN_CS,PinName PIN_RST, BusInOut *BUSLCD)
- : E(PIN_E),RW(PIN_RW),A0(PIN_A0),CS(PIN_CS),RST(PIN_RST){
- LCD_PORT = BUSLCD;
-}
-
-void delay(unsigned int n)
-{
- unsigned int i,j;
- for (i=0;i<n;i++)
- for (j=0;j<350;j++)
- {;}
-}
-void delay1(unsigned int i)
-{
- while(i--);
-}
-
-// send commands to the LCD
-void NHLCD::comm_out(unsigned char j){
- LCD_PORT->output();
- A0 = 1;
- LCD_PORT->write(j);
- CS = 0;
- RW = 0;
- E = 1;
- delay(1);
- E = 0;
- RW = 1;
- CS = 1;
-}
-
-// send data to the LCD
-void NHLCD::data_out(unsigned char j){
- LCD_PORT->output();
- A0 = 0;
- LCD_PORT->write(j);
- CS = 0;
- RW = 0;
- E = 1;
- delay(1);
- E = 0;
- RW = 1;
- CS = 1;
-}
-
-// clears the entire screen
-void NHLCD::clearScreen(){
- int n;
- comm_out(0x46); // command to set cursor location
- data_out(0x00); // 0x00 is the start of text screen
- data_out(0x00);
- comm_out(0x42); // command to write data
- for(n=0;n<1200;n++){ // 1200 locations on the screen
- data_out(0x20); // fill each with a blank
- }
- comm_out(0x46); // command to set cursor location
- data_out(0xB0); // 0x4B0 is the start of drawing screen
- data_out(0x04);
- comm_out(0x42); // command to write data
- for(n=0;n<9600;n++){ // 9600 total byte locations
- data_out(0x00); // set each to 0
- }
-}
-
-// write text on the screen
-void NHLCD::text(char *text, char row, char col){
- int c = row*40+col; // gets the correct address for the cursor
- comm_out(0x46); // command to set cursor location
- data_out((unsigned char)(c&0xFF)); // lower 8 bits of address
- data_out((unsigned char)((c&0xFF00)>>8)); // upper 8 bits of address
- comm_out(0x42); // command to write data to screen
- while(*text != 0) { // write until you hit a null terminator
- data_out(*text); // write the current character to the screen
- text++; // move to the next character
- }
-}
-
-/* set an individual pixel on the screen.
- * pixels are grouped in bytes, so you must isolate a particular pixel.
- */
-void NHLCD::setPixel(int row, int col){
- int loc = (0x04<<8)|(0xB0); //sets location to the top left corner of drawing screen
- int c = loc+row*40+(col/8); // gets address of the correct byte
- comm_out(0x46); // command to set cursor location
- data_out((unsigned char)(c&0xFF)); // lower 8 bits of address
- data_out((unsigned char)((c&0xFF00)>>8)); // upper 8 bits of address
- comm_out(0x43); // command to read the byte
- LCD_PORT->input(); // sets the buffer to input data
- unsigned char buffer = LCD_PORT->read(); // stores byte in buffer
- buffer = buffer|(1<<(7-((row*320+col)%8))); // sets the particular pixel on the byte
- LCD_PORT->output(); // sets the buffer to output data
-
- comm_out(0x46); //command to set cursor location
- data_out((unsigned char)(c&0xFF)); // lower 8 bits of address
- data_out((unsigned char)((c&0xFF00)>>8)); // upper 8 bits of address
- comm_out(0x42); // command to write to the screen
- data_out(buffer); // write buffer to the screen
-}
-
-// initialize the LCD
-void NHLCD::Init(void){
- /* reset the device */
- RST = 0;
- delay(5);
- RST = 1;
- delay(10);
-
- comm_out(0x40); // system set command
- delay(5);
- data_out(0x30); // parameters
- data_out(0x87); // horizontal character size (0x80 = 1) MUST BE MULTIPLE OF 320
- data_out(0x07); // vertical character size (0x00 = 1) MUST BE MULTIPLE OF 240
- data_out(40); // addresses per line
- data_out(80); // bytes per line
- data_out(0xEF); // 240 displace lines
- data_out(0x28); // virtual address 1
- data_out(0x00); // virtual address 2
-
- comm_out(0x44); // scroll
- data_out(0x00); // start address 1
- data_out(0x00); // start address 2
- data_out(0xEF); // 240 lines
- data_out(0xB0); // 2nd screen start1
- data_out(0x04); // 2nd screen start2
- data_out(0xEF); // 2nd screen 240 lines
- data_out(0x00); // 3rd screen address1
- data_out(0x00); // 3rd screen address2
- data_out(0x00); // 4th screen address1
- data_out(0x00); // 4th screen address2
-
- comm_out(0x5A); // hdot scr
- data_out(0x00); // horizontal pixel shift = 0
-
- comm_out(0x5B); // overlay
- data_out(0x00); // OR
-
- comm_out(0x58); // set display
- data_out(0x56);
-
- comm_out(0x5D); // cursor form
- data_out(0x04); // 5 pixels wide
- data_out(0x86); // 7 pixels tall
-
- comm_out(0x4C); // cursor direction = right
-
- comm_out(0x59); // disp on/off
- data_out(0x16); // on
- wait_ms(5);
-}
+/* mbed Newhaven LCD Library
+ * Copywrite (c) 2011, Paul Evans
+ */
+
+#include "mbed.h"
+#include "newhaven.h"
+
+NHLCD::NHLCD(PinName PIN_E,PinName PIN_RW,PinName PIN_A0,PinName PIN_CS,PinName PIN_RST, BusInOut *BUSLCD)
+ : E(PIN_E),RW(PIN_RW),A0(PIN_A0),CS(PIN_CS),RST(PIN_RST){
+ LCD_PORT = BUSLCD;
+}
+
+void delay(unsigned int n){
+ unsigned int i,j;
+ for (i=0;i<n;i++)
+ for (j=0;j<350;j++)
+ {;}
+}
+
+void delay1(unsigned int i){
+ while(i--);
+}
+
+// send commands to the LCD
+void NHLCD::comm_out(unsigned char j){
+ LCD_PORT->output(); // sets the buffer to output data
+ A0 = 1; // set for a command output
+ LCD_PORT->write(j); // send the data in the buffer
+ CS = 0; // active LOW chip select
+ RW = 0; // set to 0 for write operation
+ E = 1; // operation enable
+ delay(1); // wait for operation to complete
+ E = 0; // reset values
+ RW = 1;
+ CS = 1;
+}
+
+// send data to the LCD
+void NHLCD::data_out(unsigned char j){
+ LCD_PORT->output(); // sets the buffer to output data
+ A0 = 0; // set for a data output
+ LCD_PORT->write(j); // send the data in the buffer
+ CS = 0; // active LOW chip select
+ RW = 0; // set to 0 for write operation
+ E = 1; // operation enable
+ delay(1); // wait for operation to complete
+ E = 0; // reset values
+ RW = 1;
+ CS = 1;
+}
+
+// clears the entire screen
+void NHLCD::clearScreen(){
+ int n;
+ comm_out(0x46); // command to set cursor location
+ data_out(0x00); // 0x00 is the start of text screen
+ data_out(0x00);
+ comm_out(0x42); // command to write data
+ for(n=0;n<1200;n++){ // 1200 locations on the screen
+ data_out(0x20); // fill each with a blank
+ }
+ comm_out(0x46); // command to set cursor location
+ data_out(0xB0); // 0x4B0 is the start of drawing screen
+ data_out(0x04);
+ comm_out(0x42); // command to write data
+ for(n=0;n<9600;n++){ // 9600 total byte locations
+ data_out(0x00); // set each to 0
+ }
+}
+
+// write text on the screen
+void NHLCD::text(char *text, char row, char col){
+ int c = row*40+col; // gets the correct address for the cursor
+ comm_out(0x46); // command to set cursor location
+ data_out((unsigned char)(c&0xFF)); // lower 8 bits of address
+ data_out((unsigned char)((c&0xFF00)>>8)); // upper 8 bits of address
+ comm_out(0x42); // command to write data to screen
+ while(*text != 0) { // write until you hit a null terminator
+ data_out(*text); // write the current character to the screen
+ text++; // move to the next character
+ }
+}
+
+/* set an individual pixel on the screen.
+ * pixels are grouped in bytes, so you must isolate a particular pixel.
+ */
+void NHLCD::setPixel(int row, int col){
+ int loc = (0x04<<8)|(0xB0); //sets location to the top left corner of drawing screen
+ int c = loc+row*40+(col/8); // gets address of the correct byte
+ comm_out(0x46); // command to set cursor location
+ data_out((unsigned char)(c&0xFF)); // lower 8 bits of address
+ data_out((unsigned char)((c&0xFF00)>>8)); // upper 8 bits of address
+ comm_out(0x43); // command to read the byte
+ LCD_PORT->input(); // sets the buffer to input data
+ unsigned char buffer = LCD_PORT->read(); // stores byte in buffer
+ buffer = buffer|(1<<(7-((row*320+col)%8))); // sets the particular pixel on the byte
+ LCD_PORT->output(); // sets the buffer to output data
+
+ comm_out(0x46); //command to set cursor location
+ data_out((unsigned char)(c&0xFF)); // lower 8 bits of address
+ data_out((unsigned char)((c&0xFF00)>>8)); // upper 8 bits of address
+ comm_out(0x42); // command to write to the screen
+ data_out(buffer); // write buffer to the screen
+}
+
+// initialize the LCD
+void NHLCD::Init(void){
+ /* reset the device */
+ RST = 0;
+ delay(5);
+ RST = 1;
+ delay(10);
+
+ comm_out(0x40); // system set command
+ delay(5);
+ data_out(0x30); // parameters
+ data_out(0x87); // horizontal character size (0x80 = 1) MUST BE MULTIPLE OF 320
+ data_out(0x07); // vertical character size (0x00 = 1) MUST BE MULTIPLE OF 240
+ data_out(40); // addresses per line
+ data_out(80); // bytes per line
+ data_out(0xEF); // 240 displace lines
+ data_out(0x28); // virtual address 1
+ data_out(0x00); // virtual address 2
+
+ comm_out(0x44); // scroll
+ data_out(0x00); // start address 1
+ data_out(0x00); // start address 2
+ data_out(0xEF); // 240 lines
+ data_out(0xB0); // 2nd screen start1
+ data_out(0x04); // 2nd screen start2
+ data_out(0xEF); // 2nd screen 240 lines
+ data_out(0x00); // 3rd screen address1
+ data_out(0x00); // 3rd screen address2
+ data_out(0x00); // 4th screen address1
+ data_out(0x00); // 4th screen address2
+
+ comm_out(0x5A); // hdot scr
+ data_out(0x00); // horizontal pixel shift = 0
+
+ comm_out(0x5B); // overlay
+ data_out(0x00); // OR
+
+ comm_out(0x58); // set display
+ data_out(0x56);
+
+ comm_out(0x5D); // cursor form
+ data_out(0x04); // 5 pixels wide
+ data_out(0x86); // 7 pixels tall
+
+ comm_out(0x4C); // cursor direction = right
+
+ comm_out(0x59); // disp on/off
+ data_out(0x16); // on
+ wait_ms(5);
+}