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Merge pull request #7 from timfee/copilot/fix-screen-issue

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Fix SSD1312 OLED mirrored text: raw I2C segment remap override for corne-choc-pro driver
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Tim Feeley 2026-04-12 16:53:51 -07:00 • committed by GitHub
commit 5932400239
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2 changed files with 18 additions and 3 deletions
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8
users/timfee/config.h
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@ -16,11 +16,13 @@
#define COMBO_ONLY_FROM_LAYER 0 #define COMBO_ONLY_FROM_LAYER 0
// ── OLED (SSD1312 on Keebart Corne Choc Pro) ── // ── OLED (SSD1312 on Keebart Corne Choc Pro) ──
#define OLED_IC OLED_IC_SSD1312 // Note: The vial-qmk-corne-choc-pro driver lacks SSD1312 support
// (no OLED_IC_SSD1312, OLED_FLIP_SEGMENT, or configurable charge pump).
// We set what the driver honors here; the SSD1312-specific fixups
// (segment remap + charge pump voltage) are sent via raw I2C commands
// in oled_post_init() inside timfee.c.
#define OLED_DISPLAY_128X64 #define OLED_DISPLAY_128X64
#define OLED_FLIP_SEGMENT
#define OLED_DISPLAY_ADDRESS 0x3C #define OLED_DISPLAY_ADDRESS 0x3C
#define OLED_CHARGE_PUMP_VALUE 0x72
#define OLED_BRIGHTNESS 64 #define OLED_BRIGHTNESS 64
#define OLED_TIMEOUT 0 #define OLED_TIMEOUT 0
#define OLED_TIMEOUT_USER 60000 #define OLED_TIMEOUT_USER 60000

13
users/timfee/timfee.c
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@ -317,6 +317,19 @@ static bool oled_post_init(void) {
pin_t pen = get_charge_pump_enable_pin(); pin_t pen = get_charge_pump_enable_pin();
gpio_write_pin_high(pen); gpio_write_pin_high(pen);
wait_ms(20); wait_ms(20);
// The vial-qmk-corne-choc-pro OLED driver does not support
// OLED_IC_SSD1312, OLED_FLIP_SEGMENT, or configurable charge pump.
// It hardcodes SEGMENT_REMAP_INV (0xA1) and CHARGE_PUMP 0x14,
// but the SSD1312 needs SEGMENT_REMAP (0xA0) and charge pump 0x72.
// Send the correct values as raw I2C commands after driver init.
static const uint8_t ssd1312_fixup[] = {
0x00, // I2C command mode
0xA0, // SEGMENT_REMAP: flip segment direction for SSD1312
0x8D, 0x72, // CHARGE_PUMP: 9.0 V for SSD1312
};
oled_send_cmd(ssd1312_fixup, sizeof(ssd1312_fixup));
oled_clear(); oled_clear();
g_user_ontime = timer_read32(); g_user_ontime = timer_read32();