Add a simple serial emulation driver.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@325 38d2e660-2303-0410-9eaa-f027e97ec537

diff --git a/drv/ser_emul.c b/drv/ser_emul.c
new file mode 100755 (executable)
index 0000000..5329867
--- /dev/null
+++ b/drv/ser_emul.c
@@ -0,0 +1,163 @@
+/*!
+ * \file
+ * <!--
+ * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
+ * This file is part of DevLib - See devlib/README for information.
+ * -->
+ *
+ * \brief Serial port emulator for hosted environments.
+ *
+ * \version $Id$
+ * \author Bernardo Innocenti <bernie@develer.com>
+ */
+
+/*#*
+ *#* $Log$
+ *#* Revision 1.1  2004/12/31 17:40:00  bernie
+ *#* Add a simple serial emulation driver.
+ *#*
+ *#*/
+
+#include "ser.h"
+#include "ser_p.h"
+#include "config.h"
+
+#include <debug.h>
+#include <mware/fifobuf.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h> /* open() */
+#include <unistd.h> /* read(), write() */
+
+
+/* From the high-level serial driver */
+extern struct Serial ser_handles[SER_CNT];
+
+/* TX and RX buffers */
+static unsigned char uart0_txbuffer[CONFIG_UART0_TXBUFSIZE];
+static unsigned char uart0_rxbuffer[CONFIG_UART0_RXBUFSIZE];
+#if CONFIG_EMUL_UART1
+       static unsigned char uart1_txbuffer[CONFIG_UART1_TXBUFSIZE];
+       static unsigned char uart1_rxbuffer[CONFIG_UART1_RXBUFSIZE];
+#endif
+
+
+/*!
+ * Internal state structure
+ */
+struct EmulSerial
+{
+       struct SerialHardware hw;
+       struct Serial *ser;
+       int fd;
+};
+
+
+/*
+ * Callbacks
+ */
+static void uart_init(struct SerialHardware *_hw, struct Serial *ser)
+{
+       struct EmulSerial *hw = (struct EmulSerial *)_hw;
+
+       hw->ser = ser;
+       hw->fd = open("/dev/ttyS0", O_RDWR);
+}
+
+static void uart_cleanup(UNUSED_ARG(struct SerialHardware *, _hw))
+{
+       struct EmulSerial *hw = (struct EmulSerial *)_hw;
+
+       close(hw->fd);
+       hw->fd = -1;
+}
+
+static void uart_enabletxirq(struct SerialHardware * _hw)
+{
+       struct EmulSerial *hw = (struct EmulSerial *)_hw;
+
+       while(!fifo_isempty(&hw->ser->txfifo))
+       {
+               fputc(fifo_pop(&hw->ser->txfifo), hw->fd);
+       }
+}
+
+static void uart_setbaudrate(UNUSED_ARG(struct SerialHardware *, _hw), unsigned long rate)
+{
+       TRACEMSG("rate=%lu", rate);
+       // TODO
+
+}
+
+static void uart_setparity(UNUSED_ARG(struct SerialHardware *, _hw), int parity)
+{
+       TRACEMSG("parity=%d", parity);
+       // TODO
+}
+
+
+// FIXME: move into compiler.h?  Ditch?
+#if COMPILER_C99
+       #define C99INIT(name,val) .name = val
+#elif defined(__GNUC__)
+       #define C99INIT(name,val) name: val
+#else
+       #warning No designated initializers, double check your code
+       #define C99INIT(name,val) (val)
+#endif
+
+/*
+ * High-level interface data structures
+ */
+static const struct SerialHardwareVT UART0_VT =
+{
+       C99INIT(init, uart_init),
+       C99INIT(cleanup, uart_cleanup),
+       C99INIT(setbaudrate, uart_setbaudrate),
+       C99INIT(setparity, uart_setparity),
+       C99INIT(enabletxirq, uart_enabletxirq),
+};
+
+#if CONFIG_EMUL_UART1
+static const struct SerialHardwareVT UART1_VT =
+{
+       C99INIT(init, uart_init),
+       C99INIT(cleanup, uart_cleanup),
+       C99INIT(setbaudrate, uart_setbaudrate),
+       C99INIT(setparity, uart_setparity),
+       C99INIT(enabletxirq, uart_enabletxirq),
+};
+#endif // CONFIG_EMUL_UART1
+
+static struct EmulSerial UARTDescs[SER_CNT] =
+{
+       {
+               C99INIT(hw, /**/) {
+                       C99INIT(table, &UART0_VT),
+                       C99INIT(txbuffer, uart0_txbuffer),
+                       C99INIT(rxbuffer, uart0_rxbuffer),
+                       C99INIT(txbuffer_size, sizeof(uart0_txbuffer)),
+                       C99INIT(rxbuffer_size, sizeof(uart0_rxbuffer)),
+               },
+               C99INIT(fd, -1),
+       },
+#if CONFIG_EMUL_UART1
+       {
+               C99INIT(hw, /**/) {
+                       C99INIT(table, &UART1_VT),
+                       C99INIT(txbuffer, uart1_txbuffer),
+                       C99INIT(rxbuffer, uart1_rxbuffer),
+                       C99INIT(txbuffer_size, sizeof(uart1_txbuffer)),
+                       C99INIT(rxbuffer_size, sizeof(uart1_rxbuffer)),
+               },
+               C99INIT(fd, -1),
+       },
+#endif
+};
+
+struct SerialHardware* ser_hw_getdesc(int unit)
+{
+       ASSERT(unit < SER_CNT);
+       return &UARTDescs[unit].hw;
+}