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-rw-r--r--spi.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/spi.h b/spi.h
index 15bac4ec5..f5c877cdc 100644
--- a/spi.h
+++ b/spi.h
@@ -29,6 +29,11 @@
#define JEDEC_RDID_OUTSIZE 0x01
#define JEDEC_RDID_INSIZE 0x03
+/* Read Electronic Signature */
+#define JEDEC_RES 0xab
+#define JEDEC_RES_OUTSIZE 0x04
+#define JEDEC_RES_INSIZE 0x01
+
/* Write Enable */
#define JEDEC_WREN 0x06
#define JEDEC_WREN_OUTSIZE 0x01