diff options
Diffstat (limited to 'src/rv64')
| -rw-r--r-- | src/rv64/rv64-uart.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/rv64/rv64-uart.c b/src/rv64/rv64-uart.c index 73964ef..0bc6517 100644 --- a/src/rv64/rv64-uart.c +++ b/src/rv64/rv64-uart.c @@ -16,6 +16,7 @@ static uint8_t* cb_uart_ptr = (uint8_t*)CB_UART_BASE; utf_char_t cb_get_char(void) { uintptr_t ptr = CB_UART_BASE; + while (!(*(((volatile uint8_t*)ptr) + 0x05) & 0x01)) ; @@ -27,8 +28,14 @@ static boolean cb_locked_put_char = no; void cb_put_char(utf_char_t ch) { + int32_t timeout = 0; + while (cb_locked_put_char) { + ++timeout; + + if (timeout > 1000000) + break; } cb_locked_put_char = yes; |