host msc example work well with rp2040 pio-usb

1 files changed, 2 insertions, 6 deletions

diff --git a/hw/bsp/board.h b/hw/bsp/board.h
index 0826d7786..52c64a1cc 100644
--- a/hw/bsp/board.h
+++ b/hw/bsp/board.h
@@ -132,15 +132,11 @@ static inline void board_delay(uint32_t ms)
   }
 }
 
+// stdio getchar() is blocking, this is non-blocking version for uart
 static inline int board_uart_getchar(void)
 {
   uint8_t c;
-  return board_uart_read(&c, 1) ? (int) c : (-1);
-}
-
-static inline int board_uart_putchar(uint8_t c)
-{
-  return board_uart_write(&c, 1);
+  return ( board_uart_read(&c, 1) > 0 ) ? (int) c : (-1);
 }
 
 #ifdef __cplusplus