Make timer interface work (kind of). We can cyclically call functions now.

.gitignore

@@ -1,3 +1,5 @@
+/build/
+
 # ---> C
 # Prerequisites
 *.d

.vscode/c_cpp_properties.json

@@ -1,23 +1,23 @@
 {
-    "configurations": [
-        {
-            "name": "Linux",
-            "includePath": [
-                "${workspaceFolder}/src/include/**",
-                "${default}",
-                "/usr/include/libftdi1/**"
-            ],
-            "defines": [],
-            "compilerPath": "/usr/bin/gcc",
-            "cStandard": "c17",
-            "cppStandard": "c++14",
-            "intelliSenseMode": "linux-gcc-x64",
-            "browse": {
-                "path": [
-                    "/usr/include/libftdi1/**"
-                ]
-            }
-        }
-    ],
-    "version": 4
+	"configurations": [
+		{
+			"name": "Linux",
+			"includePath": [
+				"/usr/include/**",
+				"${workspaceFolder}/src/include/**"
+			],
+			"defines": [],
+			"compilerPath": "/usr/bin/clang",
+			"cStandard": "c17",
+			"cppStandard": "c++14",
+			"intelliSenseMode": "linux-clang-x64",
+			"browse": {
+				"path": [
+					"/usr/include/**",
+					"${workspaceFolder}/src/include/**"
+				]
+			}
+		}
+	],
+	"version": 4
 }

.vscode/launch.json

@@ -0,0 +1,28 @@
+{
+	"configurations": [
+	{
+		"name": "(gdb) Launch",
+		"type": "cppdbg",
+		"request": "launch",
+		"program": "${workspaceFolder}/build/inverter",
+		"stopAtEntry": true,
+		"cwd": "${fileDirname}",
+		"environment": [],
+		"externalConsole": false,
+		"MIMode": "gdb",
+		"preLaunchTask": "build",
+		"setupCommands": [
+			{
+				"description": "Enable pretty-printing for gdb",
+				"text": "-enable-pretty-printing",
+				"ignoreFailures": true
+			},
+			{
+				"description":  "Set Disassembly Flavor to Intel",
+				"text": "-gdb-set disassembly-flavor intel",
+				"ignoreFailures": true
+			}
+		]
+	}
+	]
+}

.vscode/settings.json

@@ -1,10 +0,0 @@
-{
-	"C_Cpp.errorSquiggles": "Enabled",
-	"files.associations": {
-		"pwm.h": "c",
-		"ftdi.h": "c",
-		"bridge.h": "c",
-		"pins.h": "c",
-		"stdio.h": "c"
-	}
-}

.vscode/tasks.json

@@ -1,30 +1,12 @@
 {
-    "tasks": [
-        {
-            "type": "cppbuild",
-            "label": "C/C++: gcc build active file",
-            "command": "/usr/bin/gcc",
-            "args": [
-                "-fdiagnostics-color=always",
-                "-g",
-                "${file}",
-                "-o",
-                "${fileDirname}/${fileBasenameNoExtension}",
-				"-I/usr/include/libftdi1",
-				"-lftdi1"
-            ],
-            "options": {
-                "cwd": "${fileDirname}"
-            },
-            "problemMatcher": [
-                "$gcc"
-            ],
-            "group": {
-                "kind": "build",
-                "isDefault": true
-            },
-            "detail": "Task generated by Debugger."
-        }
-    ],
-    "version": "2.0.0"
+	"version": "2.0.0",
+	"tasks": [
+		{
+			"type": "shell",
+			"label": "build",
+            "command": "make debug", 
+			"group": "build",
+			"detail": "compiler: /usr/bin/gcc"
+		}
+	]
 }

Makefile

@@ -3,7 +3,7 @@ BUILDFOLDER = ./build/
 TARGET = $(BUILDFOLDER)$(TARGETNAME)
 
 INC = -Isrc/include -I/usr/include -I/usr/include/libftdi1
-CFLAGS = -Wall -Wpedantic -Wextra -Os
+CFLAGS = -Wall -Wpedantic -Wextra -Os 
 CPPFLAGS = 
 
 SRC = $(wildcard src/*.c)
@@ -12,7 +12,7 @@ all: $(TARGET)
 
 $(TARGET): $(SRC)
 	mkdir -p build
-	gcc -o $@ $^ $(CPPFLAGS) $(CFLAGS) $(INC) -lm -lftdi1
+	gcc -o $@ $^ $(CPPFLAGS) $(CFLAGS) $(INC) -lm -lftdi1 -g
 
 clean:
 	rm -fr ./src/*.o ./build/

src/include/time_scales.h

@@ -0,0 +1,8 @@
+//microseconds in nanoseconds
+#define USEC (1000) 
+
+//milliseconds in nanoseconds
+#define MSEC (1000 * USEC)
+
+//seconds in nanoseconds
+#define SEC (1000 * MSEC) 

src/include/timer_utils.h

@@ -0,0 +1,21 @@
+#include <time.h>
+#include <signal.h>
+
+typedef struct
+{
+	timer_t timerid;
+	long interval;
+	struct sigevent sevp;
+	struct itimerspec times;
+	void (*funcToBeCalled)(void);
+} tmr_ctx;
+
+void tmr_timerOverflow();
+
+void tmr_initTimer(tmr_ctx *ctx);
+
+void *tmr_handleTimerOverflow(sigval_t *timer_context);
+
+int tmr_callEveryMs(void (*func)(void));
+
+void tmr_add_ns_to_current_time(struct itimerspec *current, long usecs);

src/inverter.c

@@ -1,16 +0,0 @@
-
-#include <ftdi.h>
-
-#include "pins.h"
-#include "pwm.h"
-
-#include "ftdi_utils.h"
-
-int main()
-{
-	init_ftdi();
-
-	ftdi_free(ftdi);
-
-	return 0;
-}

src/main.c

@@ -0,0 +1,27 @@
+#include <stdio.h>
+#include <ftdi.h>
+#include <unistd.h>
+
+#include "ftdi_utils.h"
+#include "timer_utils.h"
+
+
+static uint64_t counter =0;
+void test(void)
+{
+	printf("%lu\n",counter);
+	counter++;
+}
+
+int main()
+{
+	printf("Program started\n");
+	tmr_callEveryMs(test);
+
+	while (1)
+	{
+		sleep(10000);
+	}
+
+	return 0;
+}

src/timer_utils.c

@@ -0,0 +1,66 @@
+#include <time.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "time_scales.h"
+#include "timer_utils.h"
+
+static tmr_ctx timer_context;
+
+void tmr_timerOverflow()
+{
+}
+
+void tmr_initTimer(tmr_ctx *ctx)
+{
+	timer_context.sevp = (struct sigevent){
+		.sigev_notify = SIGEV_THREAD,
+		.sigev_notify_function = tmr_handleTimerOverflow,
+		.sigev_value.sival_ptr = ctx,
+	};
+
+	timer_create(CLOCK_MONOTONIC, &timer_context.sevp, &ctx->timerid);
+	clock_gettime(CLOCK_MONOTONIC, &timer_context.times.it_value);
+	tmr_add_ns_to_current_time(&timer_context.times, timer_context.interval);
+	timer_settime(timer_context.timerid, TIMER_ABSTIME, &timer_context.times, NULL);
+}
+
+void *tmr_handleTimerOverflow(sigval_t *ctx)
+{
+
+		timer_context.funcToBeCalled();
+
+
+	tmr_add_ns_to_current_time(&timer_context.times, timer_context.interval);
+	timer_settime(timer_context.timerid, TIMER_ABSTIME, &timer_context.times, NULL);
+
+	return (void *)0;
+}
+
+int tmr_callEveryMs(void (*func)(void))
+{
+	timer_context.interval = 1000000;
+	timer_context.funcToBeCalled = func;
+
+	if (!func)
+		return -1;
+
+	tmr_initTimer(&timer_context);
+
+	return 0;
+}
+
+void tmr_add_ns_to_current_time(struct itimerspec *time, long nsec)
+{
+	if ((time->it_value.tv_nsec + nsec) >= 1 * SEC)
+	{
+		time->it_value.tv_sec++;
+		time->it_value.tv_nsec -= (1 * SEC - nsec);
+	}
+	else
+	{
+		time->it_value.tv_nsec += nsec;
+	}
+}