altos: Note changes to configured AES key for SPI radio convenience

Keep a sequence number to mark when the AES key is changed so that the
radio code can avoid sending the key before every CMAC radio operation.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/core/ao.h b/src/core/ao.h
index b8bedd85..66c0881f 100644
--- a/src/core/ao.h
+++ b/src/core/ao.h
@@ -718,6 +718,8 @@ extern __xdata uint8_t ao_force_freq;
 
 #define AO_AES_LEN 16
 
+extern __xdata uint8_t ao_config_aes_seq;
+
 struct ao_config {
 	uint8_t		major;
 	uint8_t		minor;