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-rw-r--r--docs/feature_oled_driver.md2
-rw-r--r--drivers/oled/oled_driver.c4
-rw-r--r--drivers/oled/oled_driver.h4
3 files changed, 6 insertions, 4 deletions
diff --git a/docs/feature_oled_driver.md b/docs/feature_oled_driver.md
index 29548cb820..ebabc314ff 100644
--- a/docs/feature_oled_driver.md
+++ b/docs/feature_oled_driver.md
@@ -104,7 +104,7 @@ void oled_task_user(void) {
|`OLED_DISPLAY_ADDRESS` |`0x3C` |The i2c address of the OLED Display |
|`OLED_FONT_H` |`"glcdfont.c"` |The font code file to use for custom fonts |
|`OLED_FONT_START` |`0` |The starting characer index for custom fonts |
-|`OLED_FONT_END` |`224` |The ending characer index for custom fonts |
+|`OLED_FONT_END` |`223` |The ending characer index for custom fonts |
|`OLED_FONT_WIDTH` |`6` |The font width |
|`OLED_FONT_HEIGHT` |`8` |The font height (untested) |
|`OLED_TIMEOUT` |`60000` |Turns off the OLED screen after 60000ms of keyboard inactivity. Helps reduce OLED Burn-in. Set to 0 to disable. |
diff --git a/drivers/oled/oled_driver.c b/drivers/oled/oled_driver.c
index f20f4629aa..e541228ea9 100644
--- a/drivers/oled/oled_driver.c
+++ b/drivers/oled/oled_driver.c
@@ -392,6 +392,8 @@ void oled_write_char(const char data, bool invert) {
static uint8_t oled_temp_buffer[OLED_FONT_WIDTH];
memcpy(&oled_temp_buffer, oled_cursor, OLED_FONT_WIDTH);
+ _Static_assert(sizeof(font) >= ((OLED_FONT_END + 1 - OLED_FONT_START) * OLED_FONT_WIDTH), "OLED_FONT_END references outside array");
+
// set the reder buffer data
uint8_t cast_data = (uint8_t)data; // font based on unsigned type for index
if (cast_data < OLED_FONT_START || cast_data > OLED_FONT_END) {
@@ -585,4 +587,4 @@ void oled_task(void) {
#endif
}
-__attribute__((weak)) void oled_task_user(void) {} \ No newline at end of file
+__attribute__((weak)) void oled_task_user(void) {}
diff --git a/drivers/oled/oled_driver.h b/drivers/oled/oled_driver.h
index f490f367ae..e8a7188577 100644
--- a/drivers/oled/oled_driver.h
+++ b/drivers/oled/oled_driver.h
@@ -131,7 +131,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#endif
// unsigned char value of the last character in the font file
#if !defined(OLED_FONT_END)
-# define OLED_FONT_END 224
+# define OLED_FONT_END 223
#endif
// Font render width
#if !defined(OLED_FONT_WIDTH)
@@ -260,4 +260,4 @@ bool oled_scroll_off(void);
uint8_t oled_max_chars(void);
// Returns the maximum number of lines that will fit on the oled
-uint8_t oled_max_lines(void); \ No newline at end of file
+uint8_t oled_max_lines(void);