Creating a 100ns pulse with FPGA

Hi,
I was wondering if I can output 100ns pulses with my PXI- 7833R. I need to output a pulse upoon the rising edge of another signal and the pulse width need to be about 100 ~150ns. Do anyone know how can it be done?
Thanks.
Regards,
Fw

Fw
Here is one way to generate a pulse. This will generate an edge, delay 100nS, generate the opposite edge.
Visualize the Solution
CLA
LabVIEW, LabVIEW FPGA
Attachments:
Pulse.JPG ‏23 KB

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Hello,
Excuse me for my english, I'm not anglophone. I try to create a stored procedure.
This is my file SampleExternalMethods.java :
import java.sql.*; //import com.pointbase.jdbc.jdbcInOutDoubleWrapper; public class SampleExternalMethods { // A connection object to allow database callback static Connection conn = null; static Statement l_stmt; static Statement m_stmt; static CallableStatement m_callStmt = null; static ResultSet l_rs = null; public static void main(String[] args) { try { String url = "jdbc:pointbase:server://localhost/pointbaseDB"; String username = "PBPUBLIC"; String password = "PBPUBLIC"; conn = DriverManager.getConnection(url, username, password); doCreateProcedure(); doInvokeProcedure(); } catch (SQLException e) { e.printStackTrace(); } finally { if (m_stmt != null) { try { m_stmt.close(); } catch (Exception e) { e.printStackTrace(); } } if (m_callStmt != null) { try { m_callStmt.close(); } catch (Exception e) { e.printStackTrace(); } } if (conn != null) { try { conn.close(); } catch (Exception e) { e.printStackTrace(); } } } } public static void getCountry(String Iso_Code) { try { // Query the database for the country iso code l_stmt = conn.createStatement(); l_rs = l_stmt.executeQuery( "SELECT * FROM countries" + " WHERE country_iso_code ='" + Iso_Code + "'"); //Affichage du résultat de la requête l_rs.next(); System.out.print(l_rs.getString(1) + " - "); System.out.print(l_rs.getString(2) + " - "); System.out.println(l_rs.getString(3)); // Close the result set l_rs.close(); } catch (SQLException e) { e.printStackTrace(); } finally { if (l_rs != null) { try { l_rs.close(); } catch (Exception e) { e.printStackTrace(); } } if (l_stmt != null) { try { l_stmt.close(); } catch (Exception e) { e.printStackTrace(); } } } } public static void doCreateProcedure() throws SQLException { // SQL statement to create a stored procedure String SQL_CREATE_PROC = "CREATE PROCEDURE getCountry(IN P1 VARCHAR(30))" + " LANGUAGE JAVA" + " SPECIFIC getCountry" + " NO SQL" + " EXTERNAL NAME \"SampleExternalMethods::getCountry\"" + " PARAMETER STYLE SQL"; // Create a SQL statement m_stmt = conn.createStatement(); // Execute the SQL m_stmt.executeUpdate(SQL_CREATE_PROC); // Close the statement //m_stmt.close(); } public static void doInvokeProcedure() throws SQLException { // Create SQL to invoke stored procedures String SQL_USE_PROC = "{ call getCountry(?) }"; // Create a callable statement with three binding parameters m_callStmt = conn.prepareCall(SQL_USE_PROC); m_callStmt.setString(1, "CA"); m_callStmt.executeQuery(); // Close the callable statement //m_callStmt.close(); } }
Afterwards, I have read this note in a Pointbase document:
To invoke the dateConvert external Java method from a stored function, you must use the
CREATE FUNCTION statement. The dateConvert external Java method is called from the
class, SampleExternalMethods.
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If PointBase Server is run with the Java Security Manager, in the java policy file grant
’com.pointbase.sp.spPermission’ to the class that implements the external Java method.
An "spPermission" consists of a class name with no action. The class name is a name of a class
that could be used in creating a Stored Procedure in PointBase. The naming convention follows
the hierarchical property naming convention and that is supported by
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These my files in this database CLASSPATH:
pbclient.jar
pbembedded.jar
pbtools.jar
pbupgrade.jar
I have tryed to include the class SampleExternalMethods in pbclient.jar and pbembedded.jar with this command:
jar -uf pbembedded.jar SampleExternalMethods
Afterwards I do that,
1) Start Pointbase
2) Configuration of classpath
set classpath=C:\Sun\AppServer\pointbase\lib\pbclient.jar
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I precise that my file SampleExternalMethods is into D:\J2EE\Ch07Code\Ch07_06\Ch07.
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D:\J2EE\Ch07Code\Ch07_06>java -Djdbc.drivers=com.pointbase.jdbc.jdbcUniversalDriver Ch07.SampleExternalMethods
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Exception in thread "main" java.lang.NoClassDefFoundError: Ch07.SampleExternalMethods (wrong name: SampleExternalMethods)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.DefineClass(ClassLoader.java:539)
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Please, can somebody helps me?
Thank you in advance.
cagou!

jschell wrote:
And I doubt you can recurse like that for embedded java. You must have a class that does the functionality and another class that creates the proc.
>And I doubt you can recurse like that for embedded java. You must have a class that does the functionality and another class that creates the proc.
>
And I doubt you can recurse like that for embedded java. You must have a class that does the functionality and another class that creates the proc.
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SampleExternalMethods.java:
package Ch07;
import java.sql.*;*
*public class SampleExternalMethods*
*public static void getCountry(String Iso_Code)*
*// A connection object to allow database callback*
*Connection l_conn = null;*
*Statement l_stmt = null;*
*ResultSet l_rs = null;*
*try*
*String url = "jdbc:pointbase:server://localhost/pointbaseDB";*
*String username = "PBPUBLIC";*
*String password = "PBPUBLIC";*
*l_conn = DriverManager.getConnection(url, username, password);*
*// Query the database for the country iso code*
*l_stmt = l_conn.createStatement();*
*l_rs = l_stmt.executeQuery( "SELECT* FROM PBPUBLIC.COUNTRIES"
+" WHERE country_iso_code ='"+ Iso_Code +"'");+
+//Affichage du résultat de la requête+
+l_rs.next();+
+System.out.print(l_rs.getString(1)+ " - ");
System.out.print(l_rs.getString(2) +" - ");+
+System.out.println(l_rs.getString(3));+
+// Close the result set+
+l_rs.close();+
+} catch (SQLException e) {+
+e.printStackTrace();+
+} finally {+
+if (l_rs != null) {+
+try {+
+l_rs.close();+
+} catch (Exception e) {+
+e.printStackTrace();+
+}+
+}+
+if (l_stmt != null) {+
+try {+
+l_stmt.close();+
+} catch (Exception e) {+
+e.printStackTrace();+
+}+
+}+
+if (l_conn != null) {+
+try {+
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+} catch (Exception e) {+
+e.printStackTrace();+
+}+
+}+
+}+
+}+
+}+
CreateMethods.java:
+package Ch07;+
+import java.sql.*;+
+public class CreateMethods+
+{+
+// A connection object to allow database callback+
+static Connection m_conn = null;+
+static Statement m_stmt;+
+static CallableStatement m_callStmt = null;+
+public static void main(String[] args)+
+{+
+try+
+{+
+String url = "jdbc:pointbase:server://localhost/pointbaseDB";+
+String username = "PBPUBLIC";+
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+} catch (SQLException e) {+
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+} finally {+
+if (m_stmt != null) {+
+try {+
+m_stmt.close();+
+} catch (Exception e) {+
+e.printStackTrace();+
+}+
+}+
+if (m_callStmt != null) {+
+try {+
+m_callStmt.close();+
+} catch (Exception e) {+
+e.printStackTrace();+
+}+
+}+
+if (m_conn != null) {+
+try {+
+m_conn.close();+
+} catch (Exception e) {+
+e.printStackTrace();+
+}+
+}+
+}+
+}+
+public static void doCreateProcedure() throws SQLException {+
+// SQL statement to create a stored procedure+
+String SQL_CREATE_PROC = "CREATE PROCEDURE PBPUBLIC.getCountry(IN P1 VARCHAR(30))"+
" LANGUAGE JAVA"
+" SPECIFIC getCountry"+
" NO SQL"
+" EXTERNAL NAME \"SampleExternalMethods::getCountry\""+
" PARAMETER STYLE SQL";
// Create a SQL statement
m_stmt = m_conn.createStatement();
// Execute the SQL
m_stmt.executeUpdate(SQL_CREATE_PROC);
// Close the statement
//m_stmt.close();
public static void doInvokeProcedure() throws SQLException {
// Create SQL to invoke stored procedures
String SQL_USE_PROC = "{ call getCountry(?) }";
// Create a callable statement with three binding parameters
m_callStmt = m_conn.prepareCall(SQL_USE_PROC);
m_callStmt.setString(2, "CA");
m_callStmt.executeQuery();
// Close the callable statement
//m_callStmt.close();
}But I have the same error message that previously.
I have read this note and I suppose that the problem is linked:
If PointBase Server is run with the Java Security Manager, in the java policy file grant
*com.pointbase.sp.spPermission to the class that implements the external Java method.*
An "spPermission" consists of a class name with no action. The class name is a name of a class
that could be used in creating a Stored Procedure in PointBase. The naming convention follows
the hierarchical property naming convention and that is supported by
*"java.security.BasicPermission". An asterisk may appear by itself, or if immediately preceded*
by ".", may appear at the end of the name, to signify a wildcard match. The name cannot
contain any white spaces.
Can you explain me what I must to do in order to solve this problem of spPermission.
Thanks.

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