fix(rlcd): use standard write-only SPI

2026-07-24 13:56:29 -04:00
parent a60c9840ca
commit b0a22e756f
1 changed files with 4 additions and 1 deletions
@@ -434,7 +434,10 @@ static error_t start(Device* device) {
            .dc_low_on_param = 0,
            .octal_mode = 0,
            .quad_mode = 0,
-            .sio_mode = 1,
+            // The panel is write-only. Match the working MicroPython SPI configuration instead
+            // of enabling ESP-IDF's bidirectional three-wire mode on MOSI; direction switching
+            // in that mode can corrupt long framebuffer writes and show up as vertical stripes.
+            .sio_mode = 0,
            .lsb_first = 0,
            .cs_high_active = 0,
        },