SPI demo w/W25Q32 chip

gpio/spi_demo/app.c

@@ -0,0 +1,12 @@
+#include <furi.h>
+#include <furi_hal.h>
+
+void spi_demo();
+void spi_demo_v2();
+
+int32_t main_learn_spi(void* _p) {
+    UNUSED(_p);
+    spi_demo();
+    spi_demo_v2();
+    return 0;
+}