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Improve speed of display() and clear() functions

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by using horizontal addressing mode.
This commit is contained in:
Scott Allen
2014-07-31 22:37:58 -04:00
parent a32fd2c499
commit 9c5568418a
2 changed files with 49 additions and 37 deletions
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78
MicroView.cpp
View File

@@ -258,24 +258,25 @@ void MicroView::setColumnAddress(uint8_t add) {
To clear GDRAM inside the LCD controller, pass in the variable mode = ALL and to clear screen page buffer pass in the variable mode = PAGE.
*/
void MicroView::clear(uint8_t mode) {
// uint8_t page=6, col=0x40;
if (mode==ALL) {
for (int i=0;i<8; i++) {
setPageAddress(i);
setColumnAddress(0);
MVSPI.packetBegin();
DCHIGH;
command(SETADDRESSMODE, 0); // Set horizontal addressing mode
command(SETCOLUMNBOUNDS, 0, LCDTOTALWIDTH - 1); // Set width
command(SETPAGEBOUNDS, 0, LCDTOTALPAGES - 1); // Set height
MVSPI.packetBegin();
DCHIGH;
MVSPI.transfer(0);
for (int i = 1; i < LCDTOTALWIDTH * LCDTOTALPAGES; i++) {
MVSPI.wait();
MVSPI.transfer(0);
for (int j=1; j<0x80; j++) {
MVSPI.wait();
MVSPI.transfer(0);
}
MVSPI.packetEnd();
}
MVSPI.packetEnd();
command(SETADDRESSMODE, 2); // Return display to page addressing mode
}
else
{
memset(screenmemory,0,384); // (64 x 48) / 8 = 384
memset(screenmemory, 0, LCDWIDTH * LCDPAGES);
//display();
}
}
@@ -285,24 +286,25 @@ void MicroView::clear(uint8_t mode) {
To clear GDRAM inside the LCD controller, pass in the variable mode = ALL with c character and to clear screen page buffer, pass in the variable mode = PAGE with c character.
*/
void MicroView::clear(uint8_t mode, uint8_t c) {
//uint8_t page=6, col=0x40;
if (mode==ALL) {
for (int i=0;i<8; i++) {
setPageAddress(i);
setColumnAddress(0);
MVSPI.packetBegin();
DCHIGH;
command(SETADDRESSMODE, 0); // Set horizontal addressing mode
command(SETCOLUMNBOUNDS, 0, LCDTOTALWIDTH - 1); // Set width
command(SETPAGEBOUNDS, 0, LCDTOTALPAGES - 1); // Set height
MVSPI.packetBegin();
DCHIGH;
MVSPI.transfer(c);
for (int i = 1; i < LCDTOTALWIDTH * LCDTOTALPAGES; i++) {
MVSPI.wait();
MVSPI.transfer(c);
for (int j=1; j<0x80; j++) {
MVSPI.wait();
MVSPI.transfer(c);
}
MVSPI.packetEnd();
}
MVSPI.packetEnd();
command(SETADDRESSMODE, 2); // Return display to page addressing mode
}
else
{
memset(screenmemory,c,384); // (64 x 48) / 8 = 384
memset(screenmemory, c, LCDWIDTH * LCDPAGES);
display();
}
}
@@ -331,20 +333,22 @@ void MicroView::contrast(uint8_t contrast) {
Bulk move the screen buffer to the SSD1306 controller's memory so that images/graphics drawn on the screen buffer will be displayed on the OLED.
*/
void MicroView::display(void) {
uint8_t i, j;
for (i=0; i<6; i++) {
setPageAddress(i);
setColumnAddress(0);
MVSPI.packetBegin();
DCHIGH;
MVSPI.transfer(screenmemory[i*0x40]);
for (j=1;j<0x40;j++) {
MVSPI.wait();
MVSPI.transfer(screenmemory[i*0x40+j]);
}
MVSPI.packetEnd();
command(SETADDRESSMODE, 0); // Set horizontal addressing mode
command(SETCOLUMNBOUNDS,
LCDCOLUMNOFFSET,
LCDCOLUMNOFFSET + LCDWIDTH - 1); // Set width
command(SETPAGEBOUNDS, 0, LCDPAGES - 1); // Set height
MVSPI.packetBegin();
DCHIGH;
MVSPI.transfer(screenmemory[0]);
for (int i = 1; i < LCDWIDTH * LCDPAGES; i++) {
MVSPI.wait();
MVSPI.transfer(screenmemory[i]);
}
MVSPI.packetEnd();
command(SETADDRESSMODE, 2); // Restore to page addressing mode
}
//#if ARDUINO >= 100

8
MicroView.h
View File

@@ -60,6 +60,13 @@
#define LCDWIDTH 64
#define LCDHEIGHT 48
#define LCDPAGES (LCDHEIGHT / 8)
#define LCDCOLUMNOFFSET 32 // Visible start column within SSD1306 controller memory
#define LCDTOTALWIDTH 128 // Full width of SSD1306 controller memory
#define LCDTOTALHEIGHT 64 // Full height of SSD1306 controller memory
#define LCDTOTALPAGES (LCDTOTALHEIGHT / 8)
#define FONTHEADERSIZE 6
#define NORM 0
@@ -88,6 +95,7 @@
#define SETLOWCOLUMN 0x00
#define SETHIGHCOLUMN 0x10
#define SETPAGE 0xB0
#define SETADDRESSMODE 0x20
#define SETCOLUMNBOUNDS 0x21
#define SETPAGEBOUNDS 0x22
#define SETSTARTLINE 0x40