Line Connection#
Connection signals are used to control certain camera features. For example, the "TWI SDA" and "TWI SCL" signals are used for Two-Wire Interface communication.
该功能的使用#
设置 Line Connection#
设置线路连接:
- 将
LineSelector
参数设置为所需的 GPIO 线路。 - 设置
BslLineConnection
参数设置为以下值:ConnectionOff
:没有为当前选择的线路设置连接信号。TwiSda
:为当前选择的线路设置了 TWI SDA 信号。TwiScl
:为当前选择的线路设置了 TWI SCL 信号。LightControl
: The light control signal is set for the currently selected line.
- Make sure the
LineMode
parameter is set toInOut
. This allows you to use the GPIO line as an input-output line. If the parameter isn't automatically set toInOut
, set it manually.
确定 Line Connection#
确定线路连接:
- 将
LineSelector
参数设置为所需的 I/O 线路。 - 获取
BslLineConnection
参数的值以确定 I/O 线路的当前线路连接。
示例代码#
INodeMap& nodemap = camera.GetNodeMap();
// Select Line 2
CEnumParameter(nodemap, "LineSelector").SetValue("Line2");
// Set the line connection to TWI SDA
CEnumParameter(nodemap, "BslLineConnection").SetValue("TwiSda");
// Get the current line connection
String_t e = CEnumParameter(nodemap, "BslLineConnection").GetValue();
// Select Line 2
camera.Parameters[PLCamera.LineSelector].SetValue(PLCamera.LineSelector.Line2);
// Set the line connection to TWI SDA
camera.Parameters[PLCamera.BslLineConnection].SetValue(PLCamera.BslLineConnection.TwiSda);
// Get the current line connection
string e = camera.Parameters[PLCamera.BslLineConnection].GetValue();
/* Macro to check for errors */
#define CHECK(errc) if (GENAPI_E_OK != errc) printErrorAndExit(errc)
GENAPIC_RESULT errRes = GENAPI_E_OK; /* Return value of pylon methods */
size_t len = 0;
char e_str[64] = {0};
/* Select Line 2 */
errRes = PylonDeviceFeatureFromString(hdev, "LineSelector", "Line2");
CHECK(errRes);
/* Set the line connection to TWI SDA */
errRes = PylonDeviceFeatureFromString(hdev, "BslLineConnection", "TwiSda");
CHECK(errRes);
/* Get the current line connection */
len = sizeof(e_str);
errRes = PylonDeviceFeatureToString(hdev, "BslLineConnection", e_str, &len);
CHECK(errRes);
您也可以使用 pylon Viewer 轻松设置参数。