uart fixed

2 files changed, 7 insertions, 1 deletions

diff --git a/fw/fe310/eos/soc/uart.c b/fw/fe310/eos/soc/uart.c
index 589832a..1cff781 100644
--- a/fw/fe310/eos/soc/uart.c
+++ b/fw/fe310/eos/soc/uart.c
@@ -121,3 +121,8 @@ int eos_uart_getc(int block) {
     }
     return r & 0xff;
 }
+
+void eos_uart_flush_rx(void) {
+    volatile uint32_t r;
+    while (!(r = UART0_REG(UART_REG_RXFIFO) & 0x80000000));
+}
diff --git a/fw/fe310/eos/soc/uart.h b/fw/fe310/eos/soc/uart.h
index caaf6c6..41329fb 100644
--- a/fw/fe310/eos/soc/uart.h
+++ b/fw/fe310/eos/soc/uart.h
@@ -22,4 +22,5 @@ void eos_uart_txwm_clear(void);
 void eos_uart_rxwm_set(uint8_t wm);
 void eos_uart_rxwm_clear(void);
 int eos_uart_putc(int c, int block);
-int eos_uart_getc(int block);
\ No newline at end of file
+int eos_uart_getc(int block);
+void eos_uart_flush_rx(void);