diff options
Diffstat (limited to 'main/display.c')
| -rw-r--r-- | main/display.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/main/display.c b/main/display.c index a704891..8c5ffb2 100644 --- a/main/display.c +++ b/main/display.c @@ -218,6 +218,22 @@ static esp_err_t touch_release_reset(void) PC_LED_EN | PC_RST_TP_N | PC_RST_LCD_N | PC_RST_BRIDGE_N); } +// Hard-reset the touch IC: drop PC_RST_TP_N for ~20 ms, then release. +// touch_init() calls this if its dev_mode read keeps returning 0xff — +// usually unwedges a stuck FT5426 without needing a power cycle. +esp_err_t display_touch_reset_pulse(void) +{ + if (!s_panel_mcu) return ESP_ERR_INVALID_STATE; + // Hold touch in reset (clear PC_RST_TP_N), keep everything else as-is. + esp_err_t err = mcu_write_u8(REG_PORTC, + PC_LED_EN | PC_RST_LCD_N | PC_RST_BRIDGE_N); + if (err != ESP_OK) return err; + vTaskDelay(pdMS_TO_TICKS(20)); + err = touch_release_reset(); + vTaskDelay(pdMS_TO_TICKS(50)); + return err; +} + // ============================================================================ // TC358762 bridge configuration (DSI Generic Long Write packets) // Sequence mirrors Linux drivers/gpu/drm/bridge/tc358762.c tc358762_init(). |