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qmk_firmware
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faster buffer sending

This commit is contained in:
Jack Humbert 2018-10-11 13:06:17 -04:00
parent 129df28574
commit 4446a3781c
2 changed files with 20 additions and 7 deletions
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26
drivers/qwiic/micro_oled.c
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@ -43,6 +43,7 @@ uint16_t fontMapWidth;
#define swap(a, b) { uint8_t t = a; a = b; b = t; } #define swap(a, b) { uint8_t t = a; a = b; b = t; }
uint8_t micro_oled_transfer_buffer[20]; uint8_t micro_oled_transfer_buffer[20];
static uint8_t micro_oled_screen_current[384] = { 0 };
static uint8_t micro_oled_screen_buffer[] = { static uint8_t micro_oled_screen_buffer[] = {
/* LCD Memory organised in 64 horizontal pixel and 6 rows of byte /* LCD Memory organised in 64 horizontal pixel and 6 rows of byte
B B .............B ----- B B .............B -----
@ -145,7 +146,7 @@ void micro_oled_init(void) {
send_command(0x40); send_command(0x40);
send_command(DISPLAYON); //--turn on oled panel send_command(DISPLAYON); //--turn on oled panel
//clear_screen(); // Erase hardware memory inside the OLED controller to avoid random data in memory. clear_screen(); // Erase hardware memory inside the OLED controller to avoid random data in memory.
send_buffer(); send_buffer();
} }
@ -217,19 +218,30 @@ void set_contrast(uint8_t contrast) {
} }
/** \brief Transfer display buffer. /** \brief Transfer display buffer.
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. Sends the updated buffer to the controller - the current status is checked before to save i2c exectution time
*/ */
void send_buffer(void) { void send_buffer(void) {
uint8_t i, j; uint8_t i, j;
for (i=0; i<6; i++) { uint8_t page_addr = 0xFF;
set_page_address(i); for (i = 0; i < 6; i++) {
set_column_address(0); uint8_t col_addr = 0xFF;
for (j=0;j<0x40;j++) { for (j = 0; j < 0x40; j++) {
send_data(micro_oled_screen_buffer[i*0x40+j]); if (micro_oled_screen_buffer[i*0x40+j] != micro_oled_screen_current[i*0x40+j]) {
if (page_addr != i) {
set_page_address(i);
}
if (col_addr != j) {
set_column_address(j);
}
send_data(micro_oled_screen_buffer[i*0x40+j]);
micro_oled_screen_current[i*0x40+j] = micro_oled_screen_buffer[i*0x40+j];
col_addr = j + 1;
}
} }
} }
} }
/** \brief Draw pixel with color and mode. /** \brief Draw pixel with color and mode.
Draw color pixel in the screen buffer's x,y position with NORM or XOR draw mode. Draw color pixel in the screen buffer's x,y position with NORM or XOR draw mode.
*/ */

1
drivers/qwiic/micro_oled.h
View File

@ -37,6 +37,7 @@ void send_command(uint8_t command);
void send_data(uint8_t data); void send_data(uint8_t data);
void set_page_address(uint8_t address); void set_page_address(uint8_t address);
void set_column_address(uint8_t address); void set_column_address(uint8_t address);
void clear_screen(void);
void clear_buffer(void); void clear_buffer(void);
void send_buffer(void); void send_buffer(void);
void draw_pixel(uint8_t x, uint8_t y, uint8_t color, uint8_t mode); void draw_pixel(uint8_t x, uint8_t y, uint8_t color, uint8_t mode);