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Ensure that the UART port is available before writing

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This commit is contained in:
nvt-se 2010-03-03 23:18:58 +00:00
parent b59845d117
commit 7543d53603
1 changed files with 4 additions and 1 deletions
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5
cpu/msp430/dev/uart1.c
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@ -26,7 +26,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE. * SUCH DAMAGE.
* *
* @(#)$Id: uart1.c,v 1.16 2009/11/18 15:45:32 nifi Exp $ * @(#)$Id: uart1.c,v 1.17 2010/03/03 23:18:58 nvt-se Exp $
*/ */
/* /*
@ -89,6 +89,9 @@ uart1_writeb(unsigned char c)
the first byte into the UART. */ the first byte into the UART. */
if(transmitting == 0) { if(transmitting == 0) {
transmitting = 1; transmitting = 1;
/* Loop until the transmission buffer is available. */
while((IFG2 & UTXIFG1) == 0);
TXBUF1 = ringbuf_get(&txbuf); TXBUF1 = ringbuf_get(&txbuf);
} }