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Restore RS485 mode on serial port open (if RS485 is enabled via menuconfig).

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This commit is contained in:
Vytautas Lukenskas 2016-10-28 09:10:11 -06:00 committed by Gregory Nutt
parent e93bcda8ae
commit 5b1a3e6fe0
1 changed files with 60 additions and 0 deletions
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60
arch/arm/src/lpc43xx/lpc43_serial.c
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@ -92,6 +92,8 @@ struct up_dev_s
uint8_t bits; /* Number of bits (7 or 8) */
bool stopbits2; /* true: Configure with 2 stop bits instead of 1 */
#ifdef HAVE_RS485
bool dctrl; /* Hardware RS485 direction control */
bool diroinv; /* Direction pin polarity invert */
bool dtrdir; /* DTR pin is the direction bit */
#endif
};
@ -106,6 +108,13 @@ static int up_attach(struct uart_dev_s *dev);
static void up_detach(struct uart_dev_s *dev);
static int up_interrupt(int irq, void *context);
static int up_ioctl(struct file *filep, int cmd, unsigned long arg);
#ifdef HAVE_RS485
static inline int up_set_rs485_mode(struct up_dev_s *priv,
const struct serial_rs485 *mode);
static inline int up_get_rs485_mode(struct up_dev_s *priv,
struct serial_rs485 *mode);
#endif
static int up_receive(struct uart_dev_s *dev, uint32_t *status);
static void up_rxint(struct uart_dev_s *dev, bool enable);
static bool up_rxavailable(struct uart_dev_s *dev);
@ -169,6 +178,16 @@ static struct up_dev_s g_uart0priv =
.parity = CONFIG_USART0_PARITY,
.bits = CONFIG_USART0_BITS,
.stopbits2 = CONFIG_USART0_2STOP,
#if defined(CONFIG_USART0_RS485MODE)
.dctrl = true,
# if defined(CONFIG_USART0_RS485DIROIN)
.diroinv = true,
# else
.diroinv = false,
# endif
#elif defined(HAVE_RS485) /* RS485 supported, but not on USART0 */
.dctrl = false,
#endif
};
static uart_dev_t g_uart0port =
@ -236,6 +255,16 @@ static struct up_dev_s g_uart2priv =
.parity = CONFIG_USART2_PARITY,
.bits = CONFIG_USART2_BITS,
.stopbits2 = CONFIG_USART2_2STOP,
#if defined(CONFIG_USART2_RS485MODE)
.dctrl = true,
# if defined(CONFIG_USART2_RS485DIROIN)
.diroinv = true,
# else
.diroinv = false,
# endif
#elif defined(HAVE_RS485) /* RS485 supported, but not on USART2 */
.dctrl = false,
#endif
};
static uart_dev_t g_uart2port =
@ -268,6 +297,16 @@ static struct up_dev_s g_uart3priv =
.parity = CONFIG_USART3_PARITY,
.bits = CONFIG_USART3_BITS,
.stopbits2 = CONFIG_USART3_2STOP,
#if defined(CONFIG_USART3_RS485MODE)
.dctrl = true,
# if defined(CONFIG_USART3_RS485DIROIN)
.diroinv = true,
# else
.diroinv = false,
# endif
#elif defined(HAVE_RS485) /* RS485 supported, but not on USART3 */
.dctrl = false,
#endif
};
static uart_dev_t g_uart3port =
@ -572,6 +611,9 @@ static int up_setup(struct uart_dev_s *dev)
{
#ifndef CONFIG_SUPPRESS_UART_CONFIG
struct up_dev_s *priv = (struct up_dev_s *)dev->priv;
#ifdef HAVE_RS485
struct serial_rs485 rs485mode;
#endif
uint32_t lcr;
/* Clear fifos */
@ -636,6 +678,24 @@ static int up_setup(struct uart_dev_s *dev)
}
#endif
/* Setup initial RS485 settings */
#ifdef HAVE_RS485
if (priv->dctrl)
{
rs485mode.flags = SER_RS485_ENABLED;
rs485mode.delay_rts_after_send = 0;
rs485mode.delay_rts_before_send = 0;
if (priv->diroinv)
{
rs485mode.flags |= SER_RS485_RTS_ON_SEND;
}
up_set_rs485_mode(priv, &rs485mode);
}
#endif
#endif
return OK;
}