add default access mode for tu_hwfifo API make it easier for non-custom read/write

2 files changed, 8 insertions, 4 deletions

diff --git a/src/common/tusb_fifo.c b/src/common/tusb_fifo.c
index f6963a98d..362439fb8 100644
--- a/src/common/tusb_fifo.c
+++ b/src/common/tusb_fifo.c
@@ -138,7 +138,7 @@ static void stride_write(volatile void *hwfifo, const void *src, uint8_t data_st
 // Copy from fifo to fixed address buffer (usually a tx register) with TU_FIFO_FIXED_ADDR_RW32 mode
 void tu_hwfifo_write(volatile void *hwfifo, const uint8_t *src, uint16_t len, const tu_hwfifo_access_t *access_mode) {
   // Write full available 16/32 bit words to dest
-  const uint8_t data_stride = access_mode->data_stride;
+  const uint8_t data_stride = (access_mode != NULL) ? access_mode->data_stride : CFG_TUSB_FIFO_HWFIFO_DATA_STRIDE;
   while (len >= data_stride) {
     stride_write(hwfifo, src, data_stride);
     src += data_stride;
@@ -172,7 +172,7 @@ static void stride_read(const volatile void *hwfifo, void *dest, uint8_t data_st
 
 void tu_hwfifo_read(const volatile void *hwfifo, uint8_t *dest, uint16_t len, const tu_hwfifo_access_t *access_mode) {
   // Reading full available 16/32-bit hwfifo and write to fifo
-  const uint8_t data_stride = access_mode->data_stride;
+  const uint8_t data_stride = (access_mode != NULL) ? access_mode->data_stride : CFG_TUSB_FIFO_HWFIFO_DATA_STRIDE;
   while (len >= data_stride) {
     stride_read(hwfifo, dest, data_stride);
     dest += data_stride;
diff --git a/src/common/tusb_fifo.h b/src/common/tusb_fifo.h
index 6fcc7020c..6c653c729 100644
--- a/src/common/tusb_fifo.h
+++ b/src/common/tusb_fifo.h
@@ -233,12 +233,16 @@ TU_ATTR_ALWAYS_INLINE static inline uint16_t tu_fifo_write_n(tu_fifo_t *f, const
 //--------------------------------------------------------------------+
 TU_ATTR_ALWAYS_INLINE static inline uint16_t tu_hwfifo_write_from_fifo(volatile void *hwfifo, tu_fifo_t *f, uint16_t n,
                                                                        const tu_hwfifo_access_t *access_mode) {
-  return tu_fifo_read_n_access_mode(f, (void *)(uintptr_t)hwfifo, n, access_mode);
+  const tu_hwfifo_access_t default_access = {.data_stride = CFG_TUSB_FIFO_HWFIFO_DATA_STRIDE};
+  return tu_fifo_read_n_access_mode(f, (void *)(uintptr_t)hwfifo, n,
+                                    (access_mode != NULL) ? access_mode : &default_access);
 }
 
 TU_ATTR_ALWAYS_INLINE static inline uint16_t tu_hwfifo_read_to_fifo(const volatile void *hwfifo, tu_fifo_t *f,
                                                                     uint16_t n, const tu_hwfifo_access_t *access_mode) {
-  return tu_fifo_write_n_access_mode(f, (const void *)(uintptr_t)hwfifo, n, access_mode);
+  const tu_hwfifo_access_t default_access = {.data_stride = CFG_TUSB_FIFO_HWFIFO_DATA_STRIDE};
+  return tu_fifo_write_n_access_mode(f, (const void *)(uintptr_t)hwfifo, n,
+                                     (access_mode != NULL) ? access_mode : &default_access);
 }
 
 #if CFG_TUSB_FIFO_HWFIFO_API