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Diffstat (limited to 'drivers/oled/oled_driver.c')
-rw-r--r--drivers/oled/oled_driver.c31
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)