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dm36x uart: Allow UART write from interrupt context.

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This commit is contained in:
Kelvin Lawson
2013-11-14 01:01:06 +00:00
parent 735b42a182
commit 2393a08321
1 changed files with 4 additions and 4 deletions
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8
ports/arm/platforms/dm36x/uart.c
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@@ -243,8 +243,8 @@ int uart_write (const char *ptr, int len)
return 0;
}
/* Block thread on private access to the UART */
if (atomOSStarted && atomMutexGet(&uart_mutex, 0) == ATOM_OK)
/* Block thread on private access to the UART unless at interrupt context */
if (atomOSStarted && ((atomCurrentContext() == NULL) || (atomMutexGet(&uart_mutex, 0) == ATOM_OK)))
{
/* Loop through all bytes to write */
for (todo = 0; todo < len; todo++)
@@ -257,8 +257,8 @@ int uart_write (const char *ptr, int len)
uart_write_char(*ptr++);
}
/* Return mutex access */
if (atomOSStarted)
/* Return mutex access if not at interrupt context */
if (atomOSStarted && (atomCurrentContext() != NULL))
{
atomMutexPut(&uart_mutex);
}