reduce ep stream footprint by using is_mps512 since it only support bulk so far

1 files changed, 6 insertions, 5 deletions

diff --git a/src/common/tusb_private.h b/src/common/tusb_private.h
index 2cf11ea94..8a479c042 100644
--- a/src/common/tusb_private.h
+++ b/src/common/tusb_private.h
@@ -41,13 +41,14 @@ typedef struct TU_ATTR_PACKED {
 }tu_edpt_state_t;
 
 typedef struct {
-  uint8_t is_host; // 1: host, 0: device
+  struct TU_ATTR_PACKED  {
+    uint8_t is_host   : 1; // 1: host, 0: device
+    uint8_t is_mps512 : 1; // 1: 512, 0: 64 since stream is used for Bulk only
+  };
   uint8_t ep_addr;
-
-  uint16_t ep_packetsize;
   uint16_t ep_bufsize;
-  uint8_t* ep_buf; // TODO xfer_fifo can skip this buffer
 
+  uint8_t* ep_buf; // TODO xfer_fifo can skip this buffer
   tu_fifo_t ff;
 
   // mutex: read if rx, otherwise write
@@ -90,7 +91,7 @@ TU_ATTR_ALWAYS_INLINE static inline
 void tu_edpt_stream_open(tu_edpt_stream_t* s, tusb_desc_endpoint_t const *desc_ep) {
   tu_fifo_clear(&s->ff);
   s->ep_addr = desc_ep->bEndpointAddress;
-  s->ep_packetsize = tu_edpt_packet_size(desc_ep);
+  s->is_mps512 = (tu_edpt_packet_size(desc_ep) == 512) ? 1 : 0;
 }
 
 TU_ATTR_ALWAYS_INLINE static inline