From: Wolfgang Grandegger <w...@denx.de>
This patch extends rtserial.h to support RS485 and shift register empty
events. In contrast to the MPC5200 PSC UART, the 16550A seem not be able
to signal that event via interrupt. The "Tramsmitter Empty" bit in the
line status register needs to be polled.
Signed-off-by: Wolfgang Grandegger <w...@denx.de>
---
include/rtdm/rtserial.h | 14 ++++++++++++++
ksrc/drivers/serial/16550A.c | 2 +-
2 files changed, 15 insertions(+), 1 deletions(-)
diff --git a/include/rtdm/rtserial.h b/include/rtdm/rtserial.h
index 00dc536..a6d9753 100644
--- a/include/rtdm/rtserial.h
+++ b/include/rtdm/rtserial.h
@@ -130,6 +130,15 @@
/** @} */
/*!
+ * @anchor RTSER_RS485_xxx @name RTSER_RS485_xxx
+ * RS485 mode with automatic RTS handling
+ * @{ */
+#define RTSER_RS485_DISABLE 0x00
+#define RTSER_RS485_ENABLE 0x01
+#define RTSER_DEF_RS485 RTSER_RS485_DISABLE
+/** @} */
+
+/*!
* @anchor RTSER_FIFO_xxx @name RTSER_FIFO_xxx
* Reception FIFO interrupt threshold
* @{ */
@@ -165,6 +174,7 @@
#define RTSER_EVENT_ERRPEND 0x02
#define RTSER_EVENT_MODEMHI 0x04
#define RTSER_EVENT_MODEMLO 0x08
+#define RTSER_EVENT_TXEMPTY 0x10
#define RTSER_DEF_EVENT_MASK 0x00
/** @} */
@@ -184,6 +194,7 @@
#define RTSER_SET_TIMEOUT_EVENT 0x0400
#define RTSER_SET_TIMESTAMP_HISTORY 0x0800
#define RTSER_SET_EVENT_MASK 0x1000
+#define RTSER_SET_RS485 0x2000
/** @} */
@@ -282,6 +293,9 @@ typedef struct rtser_config {
/** event mask to be used with @ref RTSER_RTIOC_WAIT_EVENT, see
* @ref RTSER_EVENT_xxx */
int event_mask;
+
+ /** enable RS485 mode, see @ref RTSER_RS485_xxx */
+ int rs485;
} rtser_config_t;
/**
diff --git a/ksrc/drivers/serial/16550A.c b/ksrc/drivers/serial/16550A.c
index 61613f1..3672539 100644
--- a/ksrc/drivers/serial/16550A.c
+++ b/ksrc/drivers/serial/16550A.c
@@ -113,7 +113,7 @@ static const struct rtser_config default_config = {
0xFFFF, RTSER_DEF_BAUD, RTSER_DEF_PARITY, RTSER_DEF_BITS,
RTSER_DEF_STOPB, RTSER_DEF_HAND, RTSER_DEF_FIFO_DEPTH, 0,
RTSER_DEF_TIMEOUT, RTSER_DEF_TIMEOUT, RTSER_DEF_TIMEOUT,
- RTSER_DEF_TIMESTAMP_HISTORY, RTSER_DEF_EVENT_MASK
+ RTSER_DEF_TIMESTAMP_HISTORY, RTSER_DEF_EVENT_MASK, RTSER_DEF_RS485
};
static struct rtdm_device *device[MAX_DEVICES];
--
1.7.6.4
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