Add infrastructure to support RS-485 on the LPC43xx (logic still incomplete)
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4958 42af7a65-404d-4744-a932-0658087f49c3
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patacongo
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@ -3029,4 +3029,9 @@
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add the ability to run the chip off the internal oscillator. There is no open
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board configuration for this part yet (the STM32VLDiscovery would be a candidate).
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Contributed by Mike Smith.
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* arch/arm/src/stm32: Fixed typos in conditional compilation in the CAN and DMA
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and some pin configuration. This would have caused problems for STM32 F107xx.
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Typos noted by Mike Smith.
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* arch/arm/src/lpc43xx/lpc43_serial.c: Add support for certain RS-485 features
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in the serial driver (still a work in progress on initial check-in).
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@ -857,6 +857,50 @@ static int up_interrupt(int irq, void *context)
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return OK;
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}
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/****************************************************************************
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* Name: up_set_rs485_mode
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*
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* Description:
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* Handle LPC43xx USART0,2,3 RS485 mode set ioctl (TIOCSRS485) to enable
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* and disable RS-485 mode. This is part of the serial ioctl logic.
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*
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****************************************************************************/
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#ifdef CONFIG_USART_RS485MODE
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static inline int up_set_rs485_mode(struct up_dev_s *priv,
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const struct serial_rs485 *mode)
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{
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irqstate_t flags;
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DEBUGASSERT(priv && mode);
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flags = irqsave();
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#warning "Missing logic"
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irqrestore(flags);
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}
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#endif
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/****************************************************************************
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* Name: up_get_rs485_mode
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*
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* Description:
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* Handle LPC43xx USART0,2,3 RS485 mode get ioctl (TIOCGRS485) to get the
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* current RS-485 mode.
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*
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****************************************************************************/
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#ifdef CONFIG_USART_RS485MODE
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static inline int up_get_rs485_mode(struct up_dev_s *priv,
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struct serial_rs485 *mode)
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{
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irqstate_t flags;
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DEBUGASSERT(priv && mode);
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flags = irqsave();
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#warning "Missing logic"
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irqrestore(flags);
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}
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#endif
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/****************************************************************************
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* Name: up_ioctl
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*
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@ -906,6 +950,22 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
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}
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break;
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#ifdef CONFIG_USART_RS485MODE
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case TIOCSRS485: /* Set RS485 mode, arg: pointer to struct serial_rs485 */
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{
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ret = up_set_rs485_mode(priv,
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(const struct serial_rs485 *)((uintptr_t)arg));
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}
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break;
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case TIOCGRS485: /* Get RS485 mode, arg: pointer to struct serial_rs485 */
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{
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ret = up_get_rs485_mode(priv,
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(struct serial_rs485 *)((uintptr_t)arg));
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}
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break;
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#endif
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default:
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*get_errno_ptr() = ENOTTY;
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ret = ERROR;
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@ -716,7 +716,7 @@ LPC4330-Xplorer Configuration Options
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CONFIG_LPC43_USB1_ULPI=y
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CONFIG_LPC43_WWDT=y
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LPC43xx specific device driver settings
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LPC43xx specific U[S]ART device driver settings
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CONFIG_U[S]ARTn_SERIAL_CONSOLE - selects the UARTn for the
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console and ttys0 (default is the USART0).
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@ -729,6 +729,10 @@ LPC4330-Xplorer Configuration Options
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CONFIG_U[S]ARTn_PARTIY - 0=no parity, 1=odd parity, 2=even parity
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CONFIG_U[S]ARTn_2STOP - Two stop bits
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CONFIG_USART_RS485MODE - Support LPC43xx USART0,2,3 RS485 mode
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ioctls (TIOCSRS485 and TIOCGRS485) to enable and disable
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RS-485 mode.
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LPC43xx specific CAN device driver settings. These settings all
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require CONFIG_CAN:
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@ -227,6 +227,13 @@ CONFIG_UART1_2STOP=0
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CONFIG_USART2_2STOP=0
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CONFIG_USART3_2STOP=0
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#
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# CONFIG_USART_RS485MODE - Support LPC43xx USART0,2,3 RS485 mode
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# ioctls (TIOCSRS485 and TIOCGRS485) to enable and disable
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# RS-485 mode.
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#
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CONFIG_USART_RS485MODE=n
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#
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# LPC43xx specific PHY/Ethernet device driver settings
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#
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@ -227,6 +227,13 @@ CONFIG_UART1_2STOP=0
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CONFIG_USART2_2STOP=0
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CONFIG_USART3_2STOP=0
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#
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# CONFIG_USART_RS485MODE - Support LPC43xx USART0,2,3 RS485 mode
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# ioctls (TIOCSRS485 and TIOCGRS485) to enable and disable
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# RS-485 mode.
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#
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CONFIG_USART_RS485MODE=n
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#
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# LPC43xx specific PHY/Ethernet device driver settings
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#
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@ -160,9 +160,21 @@
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#define TIOCMIWAIT _TIOC(0x0028) /* Wait for a change on serial input line(s): void */
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#define TIOCGICOUNT _TIOC(0x0029) /* Read serial port interrupt count: FAR struct serial_icounter_struct */
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/* RS-485 Support */
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#define TIOCSRS485 _TIOC(0x002a) /* Set RS485 mode, arg: pointer to struct serial_rs485 */
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#define TIOCGRS485 _TIOC(0x002b) /* Get RS485 mode, arg: pointer to struct serial_rs485 */
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/* Debugging */
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#define TIOCSERGSTRUCT _TIOC(0x002a) /* Get device TTY structure */
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#define TIOCSERGSTRUCT _TIOC(0x002c) /* Get device TTY structure */
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/* Definitions used in struct serial_rs485 (Linux compatible) */
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#define SER_RS485_ENABLED (1 << 0) /* Enable/disble RS-485 support */
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#define SER_RS485_RTS_ON_SEND (1 << 1) /* Logic level for RTS pin when sending */
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#define SER_RS485_RTS_AFTER_SEND (1 << 2) /* Logic level for RTS pin after sent */
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#define SER_RS485_RX_DURING_TX (1 << 4)
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/********************************************************************************************
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* Public Type Definitions
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@ -178,6 +190,15 @@ struct winsize
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/* uint16_t ws_ypixel; unused */
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};
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/* Structure used with TIOCSRS485 and TIOCGRS485 (Linux compatible) */
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struct serial_rs485
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{
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uint32_t flags /* See SER_RS485_* definitions */
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uint32_t delay_rts_before_send; /* Delay before send (milliseconds) */
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uint32_t delay_rts_after_send; /* Delay after send (milliseconds) */
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};
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/********************************************************************************************
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* Public Function Prototypes
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********************************************************************************************/
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