initial

FIRMWARE/read_spiflash.c

@@ -0,0 +1,14 @@
+#include "io.h"
+
+#define SPI_FLASH_BASE ((char*)(1 << 23))
+
+int main()  {
+   for(int i=0; i<16; ++i) {
+      IO_OUT(IO_LEDS,i);
+      int lo = (int)SPI_FLASH_BASE[2*i  ];
+      int hi = (int)SPI_FLASH_BASE[2*i+1];
+      print_hex_digits((hi << 8) | lo,4); // print four hexadecimal digits
+      printf(" ");
+   }
+   printf("\n");
+}