Optimize performance: 4-bit SD_MMC, write-only SPI, and hardware byte swapping

2026-06-30 01:18:01 -07:00
parent e04ee7cfe4
commit 4fa200d649
4 changed files with 29 additions and 32 deletions
--- a/sound_picture_app/SD_Card.cpp
+++ b/sound_picture_app/SD_Card.cpp
@@ -11,8 +11,8 @@ void SD_Init() {
    printf("SD MMC: Pin change failed!\r\n");
    return;
  }
-  if (SD_MMC.begin("/sdcard", true, true)) {                              
-    printf("SD card initialization successful!\r\n");
+  if (SD_MMC.begin("/sdcard", false, true)) {                              
+    printf("SD card initialization successful (4-bit mode)!\r\n");
  } else {
    printf("SD card initialization failed!\r\n");
  }