From fbe59f7c6756edc2952b13167893b85fe6e7aecb Mon Sep 17 00:00:00 2001 From: Hesham ALMatary Date: Fri, 19 Sep 2014 14:20:35 -0500 Subject: or1ksim: Console: implement uart_read_polled Implement uart_read_polled which is needed for any application that reads input from users. It works fine with pppd, capture, and all termios tests. --- c/src/lib/libbsp/or1k/or1ksim/console/uart.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/c/src/lib/libbsp/or1k/or1ksim/console/uart.c b/c/src/lib/libbsp/or1k/or1ksim/console/uart.c index f1cfa0985f..7ceca816a5 100644 --- a/c/src/lib/libbsp/or1k/or1ksim/console/uart.c +++ b/c/src/lib/libbsp/or1k/or1ksim/console/uart.c @@ -86,9 +86,18 @@ static int uart_last_close(int major, int minor, void *arg) return 0; } -static int uart_read_polled(int minor) +static char uart_read_polled(int minor) { - return -1; + unsigned char lsr; + char c; + + /* Get a character when avaiable */ + do { + lsr = OR1KSIM_REG(OR1KSIM_BSP_UART_REG_LINE_STATUS); + } while ((lsr & OR1KSIM_BSP_UART_REG_LINE_STATUS_DR) + != OR1KSIM_BSP_UART_REG_LINE_STATUS_DR); + + return OR1KSIM_REG(OR1KSIM_BSP_UART_REG_RX); } static void uart_write_polled(int minor, char c) -- cgit v1.2.3