shrink ringbuffer size to 128 bytes
We only use it to implemet a software FIFO between the UART Rx IRQ
and the code that processes it. 1k is way too large for that.
diff --git a/firmware/src_simtrace/ringbuffer.h b/firmware/src_simtrace/ringbuffer.h
index 662ae09..801e96b 100644
--- a/firmware/src_simtrace/ringbuffer.h
+++ b/firmware/src_simtrace/ringbuffer.h
@@ -5,7 +5,7 @@
#include <stdbool.h>
#include <sys/types.h>
-#define RING_BUFLEN 1024
+#define RING_BUFLEN 128
typedef struct ringbuf {
uint8_t buf[RING_BUFLEN];