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-rw-r--r--firmware/main.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/firmware/main.c b/firmware/main.c
index e101296..945e0af 100644
--- a/firmware/main.c
+++ b/firmware/main.c
@@ -65,8 +65,8 @@ unsigned const char const CRATE_MAP[CRATE_COUNT] = {
unsigned char framebuffer1[BUS_COUNT*BUS_SIZE];
unsigned char framebuffer2[BUS_COUNT*BUS_SIZE];
-unsigned char *framebuffer_input = framebuffer1;
-unsigned char *framebuffer_output = framebuffer2;
+volatile unsigned char *framebuffer_input = framebuffer1;
+volatile unsigned char *framebuffer_output = framebuffer2;
unsigned long framebuffer_read(void *data, unsigned long len);
/* Kick off DMA transfer from RAM to SPI interfaces */