adding single thread example

app_example_singel_thread_fir_with_channels/Makefile

@@ -0,0 +1,44 @@
+# The TARGET variable determines what target system the application is 
+# compiled for. It either refers to an XN file in the source directories
+# or a valid argument for the --target option when compiling.
+
+TARGET = XDK
+
+# The APP_NAME variable determines the name of the final .xe file. It should
+# not include the .xe postfix. If left blank the name will default to 
+# the project name
+
+APP_NAME = app_example_singel_fir
+
+# The flags passed to xcc when building the application
+# You can also set the following to override flags for a particular language:
+#
+#    XCC_XC_FLAGS, XCC_C_FLAGS, XCC_ASM_FLAGS, XCC_CPP_FLAGS
+#
+# If the variable XCC_MAP_FLAGS is set it overrides the flags passed to 
+# xcc for the final link (mapping) stage.
+
+XCC_FLAGS = -O2
+
+# The USED_MODULES variable lists other module used by the application. 
+
+USED_MODULES = module_fir
+
+#=============================================================================
+# The following part of the Makefile includes the common build infrastructure
+# for compiling XMOS applications. You should not need to edit below here.
+
+
+# Use the main Makefile from module_xcommon
+-include ../module_xcommon/build/Makefile.common
+-include ../../xcommon/module_xcommon/build/Makefile.common
+
+# The final target of the build. This is usually dependent on a binary file
+# in the $(BIN_DIR) directory e.g.
+#
+#  all : $(BIN_DIR)/my_app.xe
+
+all: $(BIN_DIR)/$(APP_NAME).xe
+	@echo Build Complete
+
+clean: clean_common

app_example_singel_thread_fir_with_channels/src/main.xc

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+/*
+ * main.xc
+ *
+ *  Created on: 14 okt 2011
+ *      Author: Mikael Bohman
+ */
+//FIR filter using a channel as Inut and Ouput running on 1 trhrad. Uses the double data method and Q8.24
+
+#include <platform.h>
+#include <print.h>
+#include <xs1.h>
+#include <fir.h>
+
+#define sec XS1_TIMER_HZ
+#define ntaps 3000			   //Number of FIT filter taps
+#define POLYNOMIAL 0xEDB88320  //Used for crc32 checksum
+
+
+
+int test_performance(streaming chanend c) {
+	timer t;
+	int time;
+	unsigned crc = 0;
+	int ans = 0, i = 1;
+	printstrln("Testing performance, Running FIR-filter for 1 sec on a single thread with 3000 filter taps");
+	t:> time;
+	c<:i; //Send first sample directly after the timing started
+	time+=sec;
+	while(1) {
+		select {
+			default:
+			i++;
+			c<:i;
+			c:>ans;
+			crc32(crc, ans, POLYNOMIAL);
+			break;
+			case t when timerafter (time) :> void:
+			printstr("Filtered ");
+			printint(i);
+			printstrln(" samples during 1 second");
+			printint(i*3);
+			printstrln(" kTaps per sec.");
+			printstr("CRC32 checksum for all filtered samples was: 0x");
+			printhex(crc);
+			soutct(c,10); //end FIR thread
+			return i;
+		}
+	}
+	return -1;
+}
+
+int main() {
+	streaming chan c;
+
+	//Init the arrays
+	int ans;
+
+	unsigned crc = 0;
+	unsigned samples;
+	int x[2 * ntaps];
+	int h[ntaps];
+	for (int i = 0; i < ntaps; i++) {
+		h[i] = (i + 1)<<24;
+		x[i] = 0;
+		x[i + ntaps] = 0;
+	}par {
+		firASM_DoubleData_singleThread(c, h, x, ntaps);
+		samples = test_performance(c);
+	}
+	for (int i = 0; i < ntaps; i++) {
+		x[i] = 0;
+	}
+	printstrln(
+			"\nCalculating the CRC32 checksum from the XC implementation, this might take some time");
+	for (int i = 1; i < samples; i++) {
+		ans = fir(i, h, x, ntaps);
+		crc32(crc, ans, POLYNOMIAL);
+	}
+	printstr("Correct Checksum for filtered datasequence is: 0x");
+	printhex(crc);
+	while (1); // Program doesn't halt correctly ??
+
+return 0;
+}