diff options
Diffstat (limited to 'drivers/oled/oled_driver.c')
| -rw-r--r-- | drivers/oled/oled_driver.c | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/drivers/oled/oled_driver.c b/drivers/oled/oled_driver.c index 643e52894..a54f5fadc 100644 --- a/drivers/oled/oled_driver.c +++ b/drivers/oled/oled_driver.c @@ -33,6 +33,8 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. #endif // defined(__AVR__) // Used commands from spec sheet: https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf +// for SH1106: https://www.velleman.eu/downloads/29/infosheets/sh1106_datasheet.pdf + // Fundamental Commands #define CONTRAST 0x81 #define DISPLAY_ALL_ON 0xA5 @@ -40,6 +42,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. #define NORMAL_DISPLAY 0xA6 #define DISPLAY_ON 0xAF #define DISPLAY_OFF 0xAE +#define NOP 0xE3 // Scrolling Commands #define ACTIVATE_SCROLL 0x2F @@ -53,6 +56,9 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. #define MEMORY_MODE 0x20 #define COLUMN_ADDR 0x21 #define PAGE_ADDR 0x22 +#define PAM_SETCOLUMN_LSB 0x00 +#define PAM_SETCOLUMN_MSB 0x10 +#define PAM_PAGE_ADDR 0xB0 // 0xb0 -- 0xb7 // Hardware Configuration Commands #define DISPLAY_START_LINE 0x40 @@ -158,7 +164,11 @@ bool oled_init(uint8_t rotation) { DISPLAY_OFFSET, 0x00, DISPLAY_START_LINE | 0x00, CHARGE_PUMP, 0x14, - MEMORY_MODE, 0x00, }; // Horizontal addressing mode +#if (OLED_IC != OLED_IC_SH1106) + // MEMORY_MODE is unsupported on SH1106 (Page Addressing only) + MEMORY_MODE, 0x00, // Horizontal addressing mode +#endif + }; if (I2C_TRANSMIT_P(display_setup1) != I2C_STATUS_SUCCESS) { print("oled_init cmd set 1 failed\n"); return false; @@ -219,10 +229,25 @@ void oled_clear(void) { static void calc_bounds(uint8_t update_start, uint8_t* cmd_array) { - cmd_array[1] = OLED_BLOCK_SIZE * update_start % OLED_DISPLAY_WIDTH; - cmd_array[4] = OLED_BLOCK_SIZE * update_start / OLED_DISPLAY_WIDTH; + // Calculate commands to set memory addressing bounds. + uint8_t start_page = OLED_BLOCK_SIZE * update_start / OLED_DISPLAY_WIDTH; + uint8_t start_column = OLED_BLOCK_SIZE * update_start % OLED_DISPLAY_WIDTH; +#if (OLED_IC == OLED_IC_SH1106) + // Commands for Page Addressing Mode. Sets starting page and column; has no end bound. + // Column value must be split into high and low nybble and sent as two commands. + cmd_array[0] = PAM_PAGE_ADDR | start_page; + cmd_array[1] = PAM_SETCOLUMN_LSB | ((OLED_COLUMN_OFFSET + start_column) & 0x0f); + cmd_array[2] = PAM_SETCOLUMN_MSB | ((OLED_COLUMN_OFFSET + start_column) >> 4 & 0x0f); + cmd_array[3] = NOP; + cmd_array[4] = NOP; + cmd_array[5] = NOP; +#else + // Commands for use in Horizontal Addressing mode. + cmd_array[1] = start_column; + cmd_array[4] = start_page; cmd_array[2] = (OLED_BLOCK_SIZE + OLED_DISPLAY_WIDTH - 1) % OLED_DISPLAY_WIDTH + cmd_array[1]; cmd_array[5] = (OLED_BLOCK_SIZE + OLED_DISPLAY_WIDTH - 1) / OLED_DISPLAY_WIDTH - 1; +#endif } static void calc_bounds_90(uint8_t update_start, uint8_t* cmd_array) |