update some sense warning from -Wconversion

examples/device/cdc_msc/src/msc_disk.c

@@ -194,7 +194,7 @@ int32_t tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t offset, void* buff
   uint8_t const* addr = msc_disk[lba] + offset;
   memcpy(buffer, addr, bufsize);
 
-  return bufsize;
+  return (int32_t) bufsize;
 }
 
 bool tud_msc_is_writable_cb (uint8_t lun)
@@ -224,7 +224,7 @@ int32_t tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t offset, uint8_t*
   (void) lba; (void) offset; (void) buffer;
 #endif
 
-  return bufsize;
+  return (int32_t) bufsize;
 }
 
 // Callback invoked when received an SCSI command not in built-in list below
@@ -263,14 +263,14 @@ int32_t tud_msc_scsi_cb (uint8_t lun, uint8_t const scsi_cmd[16], void* buffer,
   {
     if(in_xfer)
     {
-      memcpy(buffer, response, resplen);
+      memcpy(buffer, response, (size_t) resplen);
     }else
     {
       // SCSI output
     }
   }
 
-  return resplen;
+  return (int32_t) resplen;
 }
 
 #endif

examples/device/cdc_msc/src/usb_descriptors.c

@@ -261,7 +261,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     const char* str = string_desc_arr[index];
 
     // Cap at max char
-    chr_count = strlen(str);
+    chr_count = (uint8_t) strlen(str);
     if ( chr_count > 31 ) chr_count = 31;
 
     // Convert ASCII string into UTF-16

hw/bsp/board.c

@@ -135,13 +135,13 @@ TU_ATTR_USED int sys_read (int fhdl, char *buf, size_t count)
 TU_ATTR_USED int sys_write (int fhdl, const void *buf, size_t count)
 {
   (void) fhdl;
-  return board_uart_write(buf, count);
+  return board_uart_write(buf, (int) count);
 }
 
 TU_ATTR_USED int sys_read (int fhdl, char *buf, size_t count)
 {
   (void) fhdl;
-  return board_uart_read((uint8_t*) buf, count);
+  return board_uart_read((uint8_t*) buf, (int) count);
 }
 
 #endif

src/class/cdc/cdc_device.c

@@ -229,7 +229,7 @@ void cdcd_init(void)
   {
     cdcd_interface_t* p_cdc = &_cdcd_itf[i];
 
-    p_cdc->wanted_char = -1;
+    p_cdc->wanted_char = (char) -1;
 
     // default line coding is : stop bit = 1, parity = none, data bits = 8
     p_cdc->line_coding.bit_rate  = 115200;

src/class/msc/msc_device.c

@@ -152,7 +152,7 @@ static inline uint16_t rdwr10_get_blocksize(msc_cbw_t const* cbw)
   // invalid block count
   if (block_count == 0) return 0;
 
-  return cbw->total_bytes / block_count;
+  return (uint16_t) (cbw->total_bytes / block_count);
 }
 
 uint8_t rdwr10_validate_cmd(msc_cbw_t const* cbw)

src/tusb.c

@@ -109,9 +109,9 @@ bool tu_edpt_validate(tusb_desc_endpoint_t const * desc_ep, tusb_speed_t speed)
 void tu_edpt_bind_driver(uint8_t ep2drv[][2], tusb_desc_interface_t const* desc_itf, uint16_t desc_len, uint8_t driver_id)
 {
   uint8_t const* p_desc = (uint8_t const*) desc_itf;
-  uint16_t len = 0;
+  uint8_t const* desc_end = p_desc + desc_len;
 
-  while( len < desc_len )
+  while( p_desc < desc_end )
   {
     if ( TUSB_DESC_ENDPOINT == tu_desc_type(p_desc) )
     {
@@ -121,7 +121,6 @@ void tu_edpt_bind_driver(uint8_t ep2drv[][2], tusb_desc_interface_t const* desc_
       ep2drv[tu_edpt_number(ep_addr)][tu_edpt_dir(ep_addr)] = driver_id;
     }
 
-    len   += (uint16_t) tu_desc_len(p_desc);
     p_desc = tu_desc_next(p_desc);
   }
 }