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SAMA5 serial: Restore logic to minimize TX interrupts. Oddly, seems to improve ADC stability

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This commit is contained in:
Gregory Nutt
2013-10-26 16:02:07 -06:00
parent 0ab6d8382f
commit ba6fe788ea
3 changed files with 3 additions and 4 deletions
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arch/arm/src/sama5/Make.defs
+1 -1
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@@ -58,7 +58,7 @@ CMN_ASRCS += cp15_clean_dcache.S cp15_flush_dcache.S cp15_invalidate_dcache_all.
CMN_CSRCS = up_initialize.c up_idle.c up_interruptcontext.c up_exit.c CMN_CSRCS = up_initialize.c up_idle.c up_interruptcontext.c up_exit.c
CMN_CSRCS += up_createstack.c up_releasestack.c up_usestack.c up_vfork.c CMN_CSRCS += up_createstack.c up_releasestack.c up_usestack.c up_vfork.c
CMN_CSRCS += up_mdelay.c up_udelay.c CMN_CSRCS += up_puts.c up_mdelay.c up_udelay.c
CMN_CSRCS += up_modifyreg8.c up_modifyreg16.c up_modifyreg32.c CMN_CSRCS += up_modifyreg8.c up_modifyreg16.c up_modifyreg32.c
CMN_CSRCS += arm_assert.c arm_blocktask.c arm_copyfullstate.c arm_dataabort.c CMN_CSRCS += arm_assert.c arm_blocktask.c arm_copyfullstate.c arm_dataabort.c
arch/arm/src/sama5/sam_serial.c
+1 -2
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@@ -1059,13 +1059,12 @@ static void up_txint(struct uart_dev_s *dev, bool enable)
#ifndef CONFIG_SUPPRESS_SERIAL_INTS #ifndef CONFIG_SUPPRESS_SERIAL_INTS
up_serialout(priv, SAM_UART_IER_OFFSET, UART_INT_TXRDY); up_serialout(priv, SAM_UART_IER_OFFSET, UART_INT_TXRDY);
# if 0 /* Seems to be unnecessary */
/* Fake a TX interrupt here by just calling uart_xmitchars() with /* Fake a TX interrupt here by just calling uart_xmitchars() with
* interrupts disabled (note this may recurse). * interrupts disabled (note this may recurse).
*/ */
uart_xmitchars(dev); uart_xmitchars(dev);
# endif
#endif #endif
} }
else else
drivers/serial/serialirq.c
+1 -1
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@@ -153,7 +153,7 @@ void uart_recvchars(FAR uart_dev_t *dev)
while (uart_rxavailable(dev)) while (uart_rxavailable(dev))
{ {
char ch = uart_receive(dev, &status); char ch = uart_receive(dev, &status);
/* If the RX buffer becomes full, then the serial data is discarded. This is /* If the RX buffer becomes full, then the serial data is discarded. This is
* necessary because on most serial hardware, you must read the data in order * necessary because on most serial hardware, you must read the data in order