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More STR7x serial changes

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1859 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2009-06-06 18:30:58 +00:00
parent 540ab99c57
commit 275e43aba2
2 changed files with 30 additions and 10 deletions
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32
arch/arm/src/str71x/str71x_serial.c
View File

@ -195,6 +195,26 @@
# warning "No CONFIG_UARTn_SERIAL_CONSOLE Setting"
#endif
/* Select RX interrupt enable bits. There are two models: (1) We interrupt
* when each character is received. Or, (2) we interrupt when either the Rx
* FIFO is half full, OR a timeout occurs with data in the RX FIFO. The
* later does not work because there seems to be a disconnect -- we can get
* the FIFO half full interrupt with no data in the RX buffer.
*/
#if 1
# define RXENABLE_BITS (STR71X_UARTIER_RHF|STR71X_UARTIER_TIMEOUTNE)
#else
# define RXENABLE_BITS STR71X_UARTIER_RNE
#endif
/* Which ever model is used, there seems to be some timing disconnects between
* Rx FIFO not full and Rx FIFO half full indications. Best bet is to use
* both.
*/
#define RXAVAILABLE_BITS (STR71X_UARTSR_RNE|STR71X_UARTSR_RHF)
/****************************************************************************
* Private Types
****************************************************************************/
@ -520,7 +540,7 @@ static int up_setup(struct uart_dev_s *dev)
}
else
{
cr |= STR71X_UARTCR_STOPBIT05;
cr |= STR71X_UARTCR_STOPBIT10;
}
up_serialout(priv, STR71X_UART_CR_OFFSET, cr);
@ -680,8 +700,8 @@ static int up_interrupt(int irq, void *context)
/* Handle incoming, receive bytes (with or without timeout) */
if ((priv->sr & STR71X_UARTSR_RNE) != 0 && /* Rx FIFO not empty */
(priv->ier & STR71X_UARTIER_RHF) != 0) /* Rx FIFO half full int enabled */
if ((priv->sr & RXAVAILABLE_BITS) != 0 && /* Data available in Rx FIFO */
(priv->ier & RXENABLE_BITS) != 0) /* Rx FIFO interrupts enabled */
{
/* Rx buffer not empty ... process incoming bytes */
@ -780,12 +800,12 @@ static void up_rxint(struct uart_dev_s *dev, boolean enable)
*/
#ifndef CONFIG_SUPPRESS_SERIAL_INTS
priv->ier |= (STR71X_UARTIER_RHF|STR71X_UARTIER_TIMEOUTNE);
priv->ier |= RXENABLE_BITS;
#endif
}
else
{
priv->ier &= ~(STR71X_UARTIER_RHF|STR71X_UARTIER_TIMEOUTNE);
priv->ier &= ~RXENABLE_BITS;
}
up_serialout(priv, STR71X_UART_IER_OFFSET, priv->ier);
}
@ -801,7 +821,7 @@ static void up_rxint(struct uart_dev_s *dev, boolean enable)
static boolean up_rxavailable(struct uart_dev_s *dev)
{
struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
return ((up_serialin(priv, STR71X_UART_SR_OFFSET) & STR71X_UARTSR_RNE) != 0);
return ((up_serialin(priv, STR71X_UART_SR_OFFSET) & RXAVAILABLE_BITS) != 0);
}
/****************************************************************************

2
arch/arm/src/str71x/str71x_uart.h
View File

@ -151,7 +151,7 @@
#define STR71X_UARTIER_TIMEOUTNE (0x0040) /* Bit 6: Time out not empty*/
#define STR71X_UARTIER_TIMEOUTIDLE (0x0080) /* Bit 7: Timeout out idle */
#define STR71X_UARTIER_RHF (0x0100) /* Bit 8: Rx half full */
#define STR71X_UIRTIER_ALL (0x01ff) /* All interrupt bits */
#define STR71X_UARTIER_ALL (0x01ff) /* All interrupt bits */
/* UART status register (SR) */