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lock UART for RS232 in putchar

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This commit is contained in:
nvt-se 2008-05-27 13:03:19 +00:00
parent bff587e32c
commit 9c9c2573c3
1 changed files with 6 additions and 9 deletions
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15
platform/msb430/dev/rs232.c
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@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* @(#)$Id: rs232.c,v 1.4 2008/03/28 15:59:58 nvt-se Exp $
* @(#)$Id: rs232.c,v 1.5 2008/05/27 13:03:19 nvt-se Exp $
*/
/** \addtogroup esbrs232
@ -79,11 +79,12 @@ rs232_send(char c)
int
putchar(int c)
{
if (uart_get_mode() == UART_MODE_RS232) {
if (uart_lock(UART_MODE_RS232)) {
/* Loop until the transmission buffer is available. */
UART_WAIT_TX();
/* Transmit the data. */
UART_TX = c;
uart_unlock(UART_MODE_RS232);
return c;
} else {
return -1;
@ -108,13 +109,9 @@ rs232_set_speed(enum rs232_speed speed)
void
rs232_print(char *cptr)
{
// lock UART for print operation
if (uart_lock(UART_MODE_RS232)) {
while(*cptr != 0) {
rs232_send(*cptr);
++cptr;
}
uart_unlock(UART_MODE_RS232);
while(*cptr != 0) {
rs232_send(*cptr);
++cptr;
}
}
/*---------------------------------------------------------------------------*/