Improve LPC17xx CAN interrupt handling; Additions to LPC17xx SPI driver
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4255 42af7a65-404d-4744-a932-0658087f49c3
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patacongo
parent
16c265fbbc
commit
2bc9057ed3
@ -501,9 +501,15 @@ static void can_rxint(FAR struct can_dev_s *dev, bool enable)
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{
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FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->cd_priv;
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uint32_t regval;
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irqstate_t flags;
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canvdbg("CAN%d enable: %d\n", priv->port, enable);
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/* The EIR register is also modifed from the interrupt handler, so we have
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* to protect this code section.
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*/
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flags = irqsave();
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regval = can_getreg(priv, LPC17_CAN_IER_OFFSET);
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if (enable)
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{
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@ -514,6 +520,7 @@ static void can_rxint(FAR struct can_dev_s *dev, bool enable)
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regval &= ~CAN_IER_RIE;
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}
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can_putreg(priv, LPC17_CAN_IER_OFFSET, regval);
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irqrestore(flags);
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}
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/****************************************************************************
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@ -534,6 +541,7 @@ static void can_txint(FAR struct can_dev_s *dev, bool enable)
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{
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FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->cd_priv;
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uint32_t regval;
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irqstate_t flags;
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canvdbg("CAN%d enable: %d\n", priv->port, enable);
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@ -544,10 +552,20 @@ static void can_txint(FAR struct can_dev_s *dev, bool enable)
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if (!enable)
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{
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/* TX interrupts are also disabled from the interrupt handler, so we have
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* to protect this code section.
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*/
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flags = irqsave();
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/* Disable all TX interrupts */
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regval = can_getreg(priv, LPC17_CAN_IER_OFFSET);
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regval &= ~(CAN_IER_TIE1 | CAN_IER_TIE2 | CAN_IER_TIE3);
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can_putreg(priv, LPC17_CAN_IER_OFFSET, regval);
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irqrestore(flags);
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}
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}
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/****************************************************************************
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@ -684,17 +702,19 @@ static int can_send(FAR struct can_dev_s *dev, FAR struct can_msg_s *msg)
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else if ((regval & CAN_SR_TBS3) != 0)
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{
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/* We have no more buffers. We will make the caller wait. First, make
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* sure that the buffer 3 TX interrupt is enabled BEFORE sending the
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* message. The TX interrupt is generated TBS3 bit in CANxSR goes from 0
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* to 1 when the TIE3 bit in CANxIER is 1. If we don't enable it now,
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* we will miss interrupts.
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* sure that all buffer 3 interrupts are enabled BEFORE sending the
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* message. The TX interrupt is generated TBSn bit in CANxSR goes from 0
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* to 1 when the TIEn bit in CANxIER is 1. If we don't enable it now,
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* we will miss the TIE3 interrupt. We enable ALL TIE interrupts here
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* because we don't care which one finishes: When first one finishes it
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* means that a transmit buffer is again available.
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*
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* Hmmm... we could probably do better than this. Buffer 1 or 2 is much
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* more likely to complete quicker than buffer 3.
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* NOTE: The IER is also modified from the interrupt handler, but the
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* following is safe because interrupts are disabled here.
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*/
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regval = can_getreg(priv, LPC17_CAN_IER_OFFSET);
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regval |= CAN_IER_TIE3;
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regval |= (CAN_IER_TIE1 | CAN_IER_TIE2 | CAN_IER_TIE3);
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can_putreg(priv, LPC17_CAN_IER_OFFSET, regval);
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/* Set up the transfer */
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@ -803,10 +823,20 @@ static void can_interrupt(FAR struct can_dev_s *dev)
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can_receive(dev, hdr, (uint8_t *)data);
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}
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/* Check for a transmit interrupt from buffer 3 */
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/* Check for a transmit interrupt from buffer 1, 2, or 3 meaning that at
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* least one TX is complete and that at least one TX buffer is available.
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*/
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if ((regval & CAN_ICR_TI3) != 0)
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if ((regval & (CAN_ICR_TI1 | CAN_ICR_TI2 |CAN_ICR_TI3)) != 0)
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{
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/* Disable all further TX interrupts */
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regval = can_getreg(priv, LPC17_CAN_IER_OFFSET);
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regval &= ~(CAN_IER_TIE1 | CAN_IER_TIE2 | CAN_IER_TIE3);
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can_putreg(priv, LPC17_CAN_IER_OFFSET, regval);
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/* Indicate that the TX is done and a new TX buffer is available */
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can_txdone(&g_can1dev);
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}
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}
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@ -47,6 +47,10 @@
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#include <stdint.h>
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#include <stdbool.h>
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#if defined(CONFIG_LPC17_SPI) || defined(CONFIG_LPC17_SSP0) || defined(CONFIG_LPC17_SSP1)
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# include <nuttx/spi.h>
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#endif
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#include "up_internal.h"
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#include "chip.h"
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@ -583,9 +587,6 @@ EXTERN void lpc17_clrpend(int irq);
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*
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************************************************************************************/
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struct spi_dev_s;
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enum spi_dev_e;
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#ifdef CONFIG_LPC17_SPI
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EXTERN void lpc17_spiselect(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected);
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EXTERN uint8_t lpc17_spistatus(FAR struct spi_dev_s *dev, enum spi_dev_e devid);
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@ -593,6 +594,7 @@ EXTERN uint8_t lpc17_spistatus(FAR struct spi_dev_s *dev, enum spi_dev_e devid);
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EXTERN int lpc17_spicmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd);
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#endif
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#endif
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#ifdef CONFIG_LPC17_SSP0
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EXTERN void lpc17_ssp0select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected);
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EXTERN uint8_t lpc17_ssp0status(FAR struct spi_dev_s *dev, enum spi_dev_e devid);
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@ -600,6 +602,7 @@ EXTERN uint8_t lpc17_ssp0status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
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EXTERN int lpc17_ssp0cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd);
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#endif
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#endif
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#ifdef CONFIG_LPC17_SSP1
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EXTERN void lpc17_ssp1select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected);
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EXTERN uint8_t lpc17_ssp1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid);
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@ -624,14 +627,49 @@ EXTERN int lpc17_ssp1cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bo
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*
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****************************************************************************/
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struct spi_dev_s;
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#ifdef CONFIG_LPC17_SPI
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EXTERN void spi_flush(FAR struct spi_dev_s *dev);
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#endif
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#if defined(CONFIG_LPC17_SSP0) || defined(CONFIG_LPC17_SSP1)
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EXTERN void ssp_flush(FAR struct spi_dev_s *dev);
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#endif
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/****************************************************************************
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* Name: lpc17_spi/ssp0/1register
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*
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* Description:
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* If the board supports a card detect callback to inform the SPI-based
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* MMC/SD drvier when an SD card is inserted or removed, then
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* CONFIG_SPI_CALLBACK should be defined and the following function(s) must
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* must be implemented. These functiosn implements the registercallback
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* method of the SPI interface (see include/nuttx/spi.h for details)
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*
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* Input Parameters:
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* dev - Device-specific state data
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* callback - The funtion to call on the media change
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* arg - A caller provided value to return with the callback
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*
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* Returned Value:
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* 0 on success; negated errno on failure.
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*
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****************************************************************************/
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#ifdef CONFIG_LPC17_SPI
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EXTERN int lpc17_spiregister(FAR struct spi_dev_s *dev,
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spi_mediachange_t callback, void *arg);
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#endif
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#ifdef CONFIG_LPC17_SSP0
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EXTERN int lpc17_ssp0register(FAR struct spi_dev_s *dev,
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spi_mediachange_t callback, void *arg);
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#endif
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#ifdef CONFIG_LPC17_SSP1
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EXTERN int lpc17_ssp1register(FAR struct spi_dev_s *dev,
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spi_mediachange_t callback, void *arg);
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#endif
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/****************************************************************************
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* Name: lpc17_dmainitialize
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*
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@ -165,18 +165,22 @@ static const struct spi_ops_s g_spi0ops =
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#ifndef CONFIG_SPI_OWNBUS
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.lock = ssp_lock,
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#endif
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.select = lpc17_ssp0select,
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.select = lpc17_ssp0select, /* Provided externally */
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.setfrequency = ssp_setfrequency,
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.setmode = ssp_setmode,
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.setbits = ssp_setbits,
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.status = lpc17_ssp0status,
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.status = lpc17_ssp0status, /* Provided externally */
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#ifdef CONFIG_SPI_CMDDATA
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.cmddata = lpc17_ssp0cmddata,
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.cmddata = lpc17_ssp0cmddata, /* Provided externally */
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#endif
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.send = ssp_send,
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.sndblock = ssp_sndblock,
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.recvblock = ssp_recvblock,
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.registercallback = 0, /* Not implemented */
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#ifdef CONFIG_SPI_CALLBACK
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.registercallback = lpc17_ssp0register, /* Provided externally */
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#else
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.registercallback = 0, /* Not implemented */
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#endif
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};
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static struct lpc17_sspdev_s g_ssp0dev =
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@ -195,18 +199,22 @@ static const struct spi_ops_s g_spi1ops =
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#ifndef CONFIG_SPI_OWNBUS
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.lock = ssp_lock,
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#endif
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.select = lpc17_ssp1select,
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.select = lpc17_ssp1select, /* Provided externally */
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.setfrequency = ssp_setfrequency,
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.setmode = ssp_setmode,
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.setbits = ssp_setbits,
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.status = lpc17_ssp1status,
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.status = lpc17_ssp1status, /* Provided externally */
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#ifdef CONFIG_SPI_CMDDATA
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.cmddata = lpc17_ssp1cmddata,
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.cmddata = lpc17_ssp1cmddata, /* Provided externally */
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#endif
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.send = ssp_send,
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.sndblock = ssp_sndblock,
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.recvblock = ssp_recvblock,
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.registercallback = 0, /* Not implemented */
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#ifdef CONFIG_SPI_CALLBACK
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.registercallback = lpc17_ssp1register, /* Provided externally */
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#else
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.registercallback = 0, /* Not implemented */
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#endif
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};
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static struct lpc17_sspdev_s g_ssp1dev =
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