Added ring buffer revert

STM32/CM7/Core/Inc/ring_buffer.h

@@ -11,3 +11,5 @@ typedef struct ring_buffer_t {
 inline void ringBufferPush(ring_buffer_t *rb, uint32_t value);
 
 inline uint32_t ringBufferRead(ring_buffer_t *rb, uint8_t idx);
+
+inline void ringBufferRevert(ring_buffer_t *rb, uint8_t val);

STM32/CM7/Core/Src/ring_buffer.c

@@ -15,3 +15,8 @@ void ringBufferPush(ring_buffer_t *rb, uint32_t value) {
 uint32_t ringBufferRead(ring_buffer_t *rb, uint8_t idx) {
   return rb->buffer[rb->w_head - 1 - idx];
 }
+
+void ringBufferRevert(ring_buffer_t *rb, uint8_t val) {
+  rb->w_head -= val;
+  return;
+}