diff options
| -rw-r--r-- | lib/utils/serial/litex-uart.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/lib/utils/serial/litex-uart.c b/lib/utils/serial/litex-uart.c index f843bf3..caf8699 100644 --- a/lib/utils/serial/litex-uart.c +++ b/lib/utils/serial/litex-uart.c @@ -20,6 +20,8 @@ #define UART_REG_EV_PENDING 4 #define UART_REG_EV_ENABLE 5 +#define UART_EV_RX 0x2 + /* clang-format on */ static volatile u32 *uart_base; @@ -42,10 +44,14 @@ static void litex_uart_putc(char ch) static int litex_uart_getc(void) { + int ret; + if (get_reg(UART_REG_RXEMPTY)) return -1; - else - return get_reg(UART_REG_RXTX); + + ret = get_reg(UART_REG_RXTX); + set_reg(UART_REG_EV_PENDING, UART_EV_RX); /* ack. char read */ + return ret; } static struct sbi_console_device litex_console = { |