if (ftdi_init(ftdi) != 0) {
free(ftdi);
- return NULL;
+ return NULL;
}
return ftdi;
ftdi_error_return(-4, "usb_open() failed");
#ifdef LIBUSB_HAS_GET_DRIVER_NP
- // Try to detach ftdi_sio kernel module
- // Returns ENODATA if driver is not loaded
+ // Try to detach ftdi_sio kernel module.
+ // Returns ENODATA if driver is not loaded.
+ //
+ // The return code is kept in a separate variable and only parsed
+ // if usb_set_configuration() or usb_claim_interface() fails as the
+ // detach operation might be denied and everything still works fine.
+ // Likely scenario is a static ftdi_sio kernel module.
if (usb_detach_kernel_driver_np(ftdi->usb_dev, ftdi->interface) != 0 && errno != ENODATA)
detach_errno = errno;
#endif
- if (usb_set_configuration(ftdi->usb_dev, dev->config[0].bConfigurationValue)) {
+ // set configuration (needed especially for windows)
+ // tolerate EBUSY: one device with one configuration, but two interfaces
+ // and libftdi sessions to both interfaces (e.g. FT2232)
+ if (dev->descriptor.bNumConfigurations > 0 &&
+ usb_set_configuration(ftdi->usb_dev, dev->config[0].bConfigurationValue) &&
+ errno != EBUSY)
+ {
usb_close (ftdi->usb_dev);
if (detach_errno == EPERM) {
ftdi_error_return(-8, "inappropriate permissions on device!");
*/
int ftdi_usb_reset(struct ftdi_context *ftdi)
{
- if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 0, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
+ if (usb_control_msg(ftdi->usb_dev, SIO_RESET_REQUEST_TYPE,
+ SIO_RESET_REQUEST, SIO_RESET_SIO,
+ ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
ftdi_error_return(-1,"FTDI reset failed");
// Invalidate data in the readbuffer
*/
int ftdi_usb_purge_rx_buffer(struct ftdi_context *ftdi)
{
- if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 1, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
+ if (usb_control_msg(ftdi->usb_dev, SIO_RESET_REQUEST_TYPE,
+ SIO_RESET_REQUEST, SIO_RESET_PURGE_RX,
+ ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
ftdi_error_return(-1, "FTDI purge of RX buffer failed");
// Invalidate data in the readbuffer
*/
int ftdi_usb_purge_tx_buffer(struct ftdi_context *ftdi)
{
- if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 2, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
+ if (usb_control_msg(ftdi->usb_dev, SIO_RESET_REQUEST_TYPE,
+ SIO_RESET_REQUEST, SIO_RESET_PURGE_TX,
+ ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
ftdi_error_return(-1, "FTDI purge of TX buffer failed");
return 0;
: (baudrate * 21 < actual_baudrate * 20)))
ftdi_error_return (-1, "Unsupported baudrate. Note: bitbang baudrates are automatically multiplied by 4");
- if (usb_control_msg(ftdi->usb_dev, 0x40, 3, value, index, NULL, 0, ftdi->usb_write_timeout) != 0)
+ if (usb_control_msg(ftdi->usb_dev, SIO_SET_BAUDRATE_REQUEST_TYPE,
+ SIO_SET_BAUDRATE_REQUEST, value,
+ index, NULL, 0, ftdi->usb_write_timeout) != 0)
ftdi_error_return (-2, "Setting new baudrate failed");
ftdi->baudrate = baudrate;
}
/**
- Set (RS232) line characteristics by Alain Abbas
+ Set (RS232) line characteristics.
+ The break type can only be set via ftdi_set_line_property2()
+ and defaults to "off".
\param ftdi pointer to ftdi_context
\param bits Number of bits
int ftdi_set_line_property(struct ftdi_context *ftdi, enum ftdi_bits_type bits,
enum ftdi_stopbits_type sbit, enum ftdi_parity_type parity)
{
+ return ftdi_set_line_property2(ftdi, bits, sbit, parity, BREAK_OFF);
+}
+
+/**
+ Set (RS232) line characteristics
+
+ \param ftdi pointer to ftdi_context
+ \param bits Number of bits
+ \param sbit Number of stop bits
+ \param parity Parity mode
+ \param break_type Break type
+
+ \retval 0: all fine
+ \retval -1: Setting line property failed
+*/
+int ftdi_set_line_property2(struct ftdi_context *ftdi, enum ftdi_bits_type bits,
+ enum ftdi_stopbits_type sbit, enum ftdi_parity_type parity,
+ enum ftdi_break_type break_type)
+{
unsigned short value = bits;
switch(parity) {
break;
}
- if (usb_control_msg(ftdi->usb_dev, 0x40, 0x04, value, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
+ switch(break_type) {
+ case BREAK_OFF:
+ value |= (0x00 << 14);
+ break;
+ case BREAK_ON:
+ value |= (0x01 << 14);
+ break;
+ }
+
+ if (usb_control_msg(ftdi->usb_dev, SIO_SET_DATA_REQUEST_TYPE,
+ SIO_SET_DATA_REQUEST, value,
+ ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
ftdi_error_return (-1, "Setting new line property failed");
return 0;
}
/**
+ Set flowcontrol for ftdi chip
+
+ \param ftdi pointer to ftdi_context
+ \param flowctrl flow control to use. should be
+ SIO_DISABLE_FLOW_CTRL, SIO_RTS_CTS_HS, SIO_DTR_DSR_HS or SIO_XON_XOFF_HS
+
+ \retval 0: all fine
+ \retval -1: set flow control failed
+*/
+int ftdi_setflowctrl(struct ftdi_context *ftdi, int flowctrl)
+{
+ if (usb_control_msg(ftdi->usb_dev, SIO_SET_FLOW_CTRL_REQUEST_TYPE,
+ SIO_SET_FLOW_CTRL_REQUEST, 0, (flowctrl | ftdi->index),
+ NULL, 0, ftdi->usb_write_timeout) != 0)
+ ftdi_error_return(-1, "set flow control failed");
+
+ return 0;
+}
+
+/**
+ Set dtr line
+
+ \param ftdi pointer to ftdi_context
+ \param state state to set line to (1 or 0)
+
+ \retval 0: all fine
+ \retval -1: set dtr failed
+*/
+int ftdi_setdtr(struct ftdi_context *ftdi, int state)
+{
+ unsigned short usb_val;
+
+ if (state)
+ usb_val = SIO_SET_DTR_HIGH;
+ else
+ usb_val = SIO_SET_DTR_LOW;
+
+ if (usb_control_msg(ftdi->usb_dev, SIO_SET_MODEM_CTRL_REQUEST_TYPE,
+ SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
+ NULL, 0, ftdi->usb_write_timeout) != 0)
+ ftdi_error_return(-1, "set dtr failed");
+
+ return 0;
+}
+
+/**
+ Set rts line
+
+ \param ftdi pointer to ftdi_context
+ \param state state to set line to (1 or 0)
+
+ \retval 0: all fine
+ \retval -1 set rts failed
+*/
+int ftdi_setrts(struct ftdi_context *ftdi, int state)
+{
+ unsigned short usb_val;
+
+ if (state)
+ usb_val = SIO_SET_RTS_HIGH;
+ else
+ usb_val = SIO_SET_RTS_LOW;
+
+ if (usb_control_msg(ftdi->usb_dev, SIO_SET_MODEM_CTRL_REQUEST_TYPE,
+ SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
+ NULL, 0, ftdi->usb_write_timeout) != 0)
+ ftdi_error_return(-1, "set of rts failed");
+
+ return 0;
+}
+
+/**
+ Set dtr and rts line in one pass
+
+ \param ftdi pointer to ftdi_context
+ \param dtr DTR state to set line to (1 or 0)
+ \param rts RTS state to set line to (1 or 0)
+
+ \retval 0: all fine
+ \retval -1 set dtr/rts failed
+ */
+int ftdi_setdtr_rts(struct ftdi_context *ftdi, int dtr, int rts)
+{
+ unsigned short usb_val;
+
+ if (dtr)
+ usb_val = SIO_SET_DTR_HIGH;
+ else
+ usb_val = SIO_SET_DTR_LOW;
+
+ if (rts)
+ usb_val |= SIO_SET_RTS_HIGH;
+ else
+ usb_val |= SIO_SET_RTS_LOW;
+
+ if (usb_control_msg(ftdi->usb_dev, SIO_SET_MODEM_CTRL_REQUEST_TYPE,
+ SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
+ NULL, 0, ftdi->usb_write_timeout) != 0)
+ ftdi_error_return(-1, "set of rts/dtr failed");
+
+ return 0;
+}
+
+/**
Set the special event character
\param ftdi pointer to ftdi_context
return ftdi->error_str;
}
-/*
- Flow control code by Lorenz Moesenlechner (lorenz@hcilab.org)
- and Matthias Kranz (matthias@hcilab.org)
-*/
-/**
- Set flowcontrol for ftdi chip
-
- \param ftdi pointer to ftdi_context
- \param flowctrl flow control to use. should be
- SIO_DISABLE_FLOW_CTRL, SIO_RTS_CTS_HS, SIO_DTR_DSR_HS or SIO_XON_XOFF_HS
-
- \retval 0: all fine
- \retval -1: set flow control failed
-*/
-int ftdi_setflowctrl(struct ftdi_context *ftdi, int flowctrl)
-{
- if (usb_control_msg(ftdi->usb_dev, SIO_SET_FLOW_CTRL_REQUEST_TYPE,
- SIO_SET_FLOW_CTRL_REQUEST, 0, (flowctrl | ftdi->interface),
- NULL, 0, ftdi->usb_write_timeout) != 0)
- ftdi_error_return(-1, "set flow control failed");
-
- return 0;
-}
-
-/**
- Set dtr line
-
- \param ftdi pointer to ftdi_context
- \param state state to set line to (1 or 0)
-
- \retval 0: all fine
- \retval -1: set dtr failed
-*/
-int ftdi_setdtr(struct ftdi_context *ftdi, int state)
-{
- unsigned short usb_val;
-
- if (state)
- usb_val = SIO_SET_DTR_HIGH;
- else
- usb_val = SIO_SET_DTR_LOW;
-
- if (usb_control_msg(ftdi->usb_dev, SIO_SET_MODEM_CTRL_REQUEST_TYPE,
- SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->interface,
- NULL, 0, ftdi->usb_write_timeout) != 0)
- ftdi_error_return(-1, "set dtr failed");
-
- return 0;
-}
-
-/**
- Set rts line
-
- \param ftdi pointer to ftdi_context
- \param state state to set line to (1 or 0)
-
- \retval 0: all fine
- \retval -1 set rts failed
-*/
-int ftdi_setrts(struct ftdi_context *ftdi, int state)
-{
- unsigned short usb_val;
-
- if (state)
- usb_val = SIO_SET_RTS_HIGH;
- else
- usb_val = SIO_SET_RTS_LOW;
-
- if (usb_control_msg(ftdi->usb_dev, SIO_SET_MODEM_CTRL_REQUEST_TYPE,
- SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->interface,
- NULL, 0, ftdi->usb_write_timeout) != 0)
- ftdi_error_return(-1, "set of rts failed");
-
- return 0;
-}
-
/* @} end of doxygen libftdi group */
git://developer.intra2net.com / libftdi / blobdiff