diff options
Diffstat (limited to 'drv_generic_serial.c')
| -rw-r--r-- | drv_generic_serial.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/drv_generic_serial.c b/drv_generic_serial.c index 88ef87c..1ab2c97 100644 --- a/drv_generic_serial.c +++ b/drv_generic_serial.c @@ -1,4 +1,4 @@ -/* $Id: drv_generic_serial.c 890 2008-08-31 18:27:53Z sonic74 $ +/* $Id: drv_generic_serial.c 1171 2012-01-16 02:53:14Z michael $ * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/drv_generic_serial.c $ * * generic driver helper for serial and usbserial displays @@ -58,6 +58,8 @@ #include <fcntl.h> #include <time.h> #include <signal.h> +#include <linux/serial.h> +#include <sys/ioctl.h> #include <sys/types.h> #include <sys/stat.h> @@ -205,6 +207,25 @@ static pid_t drv_generic_serial_unlock_port(const char *Port) return 0; } +int drv_generic_serial_open_handshake(const char *section, const char *driver, const unsigned int flags) +{ + int fd; + struct termios portset; + struct serial_struct serinfo; + fd = drv_generic_serial_open(section, driver, flags); /* Open the Port with the original function */ + + /* We activate the Usage of the Handshake Pins */ + tcgetattr(fd, &portset); /* Get Port Attributes */ + portset.c_cflag |= CRTSCTS; /* Set Handshake */ + tcsetattr(fd, TCSANOW, &portset); /* Set Port Attrributes */ + + /* This sets the UART-Type to the simplest one: 8250. No Fifos or other Features */ + /* Fifo destroys Handshake so needs to be disabled */ + ioctl(fd, TIOCGSERIAL, &serinfo); /* Get Serial Info */ + serinfo.type = PORT_8250; /* Set to super-simple Port Type */ + ioctl(fd, TIOCSSERIAL, &serinfo); /* Write Back modified Info */ + return fd; +} int drv_generic_serial_open(const char *section, const char *driver, const unsigned int flags) { @@ -330,6 +351,22 @@ int drv_generic_serial_read(char *string, const int len) return ret; } +void drv_generic_serial_write_rts(const char *string, const int len) +{ + int serial, p, tocnt; + + for (p = 0; p < len; p++) { /* Send Byte-by-Byte checking RTS-Line */ + /* Timeout is 500ms */ + tocnt = 250; /* 250 * 2 */ + ioctl(Device, TIOCMGET, &serial); /* Get status of Control Lines */ + while (!(serial & TIOCM_RTS) && tocnt) { /* Wait until RTS is set or timeout */ + tocnt--; /* decrease timeout counter */ + usleep(2000); /* Wait two milliseconds */ + ioctl(Device, TIOCMGET, &serial); + } + drv_generic_serial_write(&string[p], 1); /* Actually send one byte */ + } +} void drv_generic_serial_write(const char *string, const int len) { |