ringbuf.c: rbuf peek function

firmware/src_simtrace/iso7816_uart.h

@@ -1,6 +0,0 @@
-
-void iso_uart_dump(void);
-void iso_uart_rst(unsigned int state);
-void iso_uart_rx_mode(void);
-void iso_uart_clk_master(unsigned int master);
-void iso_uart_init(void);

firmware/src_simtrace/ringbuffer.c

@@ -14,6 +14,11 @@ uint8_t rbuf_read(volatile ringbuf *rb)
     return val;
 }
 
+uint8_t rbuf_peek(volatile ringbuf *rb)
+{
+    return rb->buf[rb->ird];
+}
+
 void rbuf_write(volatile volatile ringbuf *rb, uint8_t item)
 {
     if(!rbuf_is_full(rb)) {

firmware/src_simtrace/ringbuffer.h

@@ -15,6 +15,7 @@ typedef struct ringbuf {
 
 void rbuf_reset(volatile ringbuf *rb);
 uint8_t rbuf_read(volatile ringbuf *rb);
+uint8_t rbuf_peek(volatile ringbuf *rb);
 void rbuf_write(volatile ringbuf *rb, uint8_t item);
 bool rbuf_is_empty(volatile ringbuf *rb);
 bool rbuf_is_full(volatile ringbuf *rb);