sydev training support for Imx93-frdm

Makefile

@@ -50,7 +50,7 @@ STYLESHEET = common/beamerthemeBootlin.sty
 # in .pdf in the output directory. This is used to compute the list of
 # .pdf files that need to be generated from .dia or .svg files.
 PICTURES_WITH_TRANSFORMATION = \
-	$(patsubst %.$(2),$(OUTDIR)/%.pdf,$(foreach s,$(1),$(wildcard $(s)/*.$(2))))
+    $(patsubst %.$(2),$(OUTDIR)/%.pdf,$(foreach s,$(1),$(shell find -L $(s) -type f -name '*.$(2)')))
 
 # Function that computes the list of pictures of the extension given
 # in $(2) from the directories in $(1). This is used for pictures that
@@ -94,6 +94,7 @@ SLIDES_COMMON_BEFORE = common/slide-header.tex \
 		       common/$(SLIDES_TRAINING)-title.tex
 SLIDES_CHAPTERS      = $($(call UPPERCASE, $(subst  -,_, $(SLIDES_TRAINING)))_SLIDES)
 SLIDES_COMMON_AFTER  = common/slide-footer.tex
+SLIDES_VARSFILE      = common/$(SLIDES_TRAINING)-labs-vars.tex
 else
 SLIDES_TRAINING      = $(firstword $(subst -, ,  $(SLIDES)))
 ifeq ($(SLIDES_TRAINING),sysdev)
@@ -122,6 +123,7 @@ endif
 
 # Compute the set of corresponding .tex files and pictures
 SLIDES_TEX      = \
+	$(SLIDES_VARSFILE) \
 	$(SLIDES_COMMON_BEFORE) \
 	$(foreach s,$(SLIDES_CHAPTERS),$(wildcard slides/$(s)/$(s).tex)) \
 	$(SLIDES_COMMON_AFTER)

common/embedded-linux-imx93-frdm-labs-vars.tex

@@ -0,0 +1,15 @@
+\def\labbooktitle{Embedded Linux System Development}
+\def\labbooksubtitle{imx93 frdm variant}
+\def\labboard{imx93-frdm}
+\def\workingkernel{6.15}
+\def\labboarddescription{imx93 frdm Discovery kit}
+\def\zimageboardaddr{0xc2000000}
+\def\dtbboardaddr{0xc4f00000}
+\def\dtname{imx93-11x11-frdm}
+\def\hosttty{/dev/ttyACM0}
+\def\ttyname{ttyLP0}
+\def\console{\ttyname,115200}
+\def\gpionum{533}
+\def\gpioname{PF11}
+\def\busname{I2C2}
+\def\arch{ARM64}

common/embedded-linux-imx93-frdm-title.tex

@@ -0,0 +1,2 @@
+\def \trainingurl{https://bootlin.com/training/embedded-linux}
+\def \trainingtitle{Embedded Linux system development}

common/slide-header.tex

@@ -9,6 +9,7 @@
 \usepackage{tabularx}
 \usepackage{stmaryrd}
 \usepackage{appendixnumberbeamer}
+\usepackage{etoolbox}
 
 \renewcommand{\thempfootnote}{\arabic{mpfootnote}}
 

lab-data/embedded-linux-imx93-frdm/appdev/nunchuk-mpd-client.c

@@ -0,0 +1,170 @@
+/* nunchuk-mpd-client
+   (c) 2022 Bootlin <[email protected]>
+
+   License: Public Domain
+*/
+
+#include <dirent.h>
+#include <mpd/client.h>
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <linux/input.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+
+static int handle_error(struct mpd_connection *c)
+{
+	fprintf(stderr, "%s\n", mpd_connection_get_error_message(c));
+	mpd_connection_free(c);
+	return EXIT_FAILURE;
+}
+
+static void change_volume(struct mpd_connection *c, int delta)
+{
+	int volume;
+	if (!mpd_run_change_volume(c, delta))
+		exit(handle_error(c));
+
+        volume = mpd_run_get_volume(c);
+
+        if (volume == -1)
+		exit(handle_error(c));
+
+	printf("%d\n", volume);
+}
+
+static void print_current_song(struct mpd_connection *c)
+{
+	struct mpd_song *song;
+	song = mpd_run_current_song(c);
+
+	if (song) {
+		printf("%s (%u s)\n", mpd_song_get_uri(song), mpd_song_get_duration(song));
+                mpd_song_free(song);
+        }
+}
+
+static int is_event_device(const struct dirent *dir) {
+        return (strncmp("event", dir->d_name, 5) == 0);
+}
+
+int main(int argc, char ** argv)
+{
+	struct mpd_connection *conn;
+	int i, ndev, ret, fd, quit = 0, num_events = 0;
+	struct input_event event;
+	struct dirent **namelist;
+
+        /* Find Nunchuk input device */
+
+	ndev = scandir("/dev/input", &namelist, is_event_device, alphasort);
+
+	if (ndev <= 0) {
+		fprintf(stderr, "ERROR: no input event device found\n");
+		exit(EXIT_FAILURE);
+	}
+
+        for (i = 0; i < ndev; i++)
+        {
+                char fname[256];
+                char name[256];
+
+                snprintf(fname, sizeof(fname), "/dev/%s", namelist[i]->d_name);
+		free(namelist[i]);
+
+                fd = open(fname, O_RDONLY);
+
+                if (fd < 0)
+                        continue;
+
+                ioctl(fd, EVIOCGNAME(sizeof(name)), name);
+
+		if (strcmp("Wii Nunchuck", name) == 0)
+			break;
+		else
+			close(fd);
+
+        }
+
+	if (i == ndev) {
+		fprintf(stderr, "ERROR: didn't manage to find the Nunchuk device in /dev/input. Is the Nunchuk driver loaded?\n");
+		exit(EXIT_FAILURE);
+        }
+
+	/* Connection to MPD on localhost, default port */
+
+	conn = mpd_connection_new(0, 0, 30000);
+
+	if (mpd_connection_get_error(conn) != MPD_ERROR_SUCCESS)
+		return handle_error(conn);
+
+	printf("Connection successful\n");
+
+	/* Main loop */
+
+	while (!quit) {
+		ret = read(fd, &event, sizeof(struct input_event));
+		num_events++;
+
+		switch (event.type) {
+		case EV_KEY:
+			switch (event.code) {
+			case BTN_Z:
+				if (event.value == 1) {
+					printf("Play/Pause\n");
+					if (!mpd_run_toggle_pause(conn))
+						return handle_error(conn);
+				}
+				break;
+			case BTN_C:
+				if (event.value == 1) {
+					printf("Quit\n");
+					quit = 1;
+					free(conn);
+				}
+				break;
+			}
+			break;
+		case EV_ABS:
+			switch (event.code) {
+			case ABS_Y:
+				if (event.value > 250) {
+					printf("Volume up: ");
+					change_volume(conn, 5);
+				} else if (event.value < 5) {
+					printf("Volume down: ");
+					change_volume(conn, -5);
+				}
+				break;
+			case ABS_X:
+				if (event.value > 250) {
+					if (!mpd_run_next(conn)) {
+						printf("No next song. Aborting\n");
+						exit(handle_error(conn));
+					} else {
+						printf("Next song: ");
+						print_current_song(conn);
+					}
+				}
+				else if (event.value < 5) {
+					if (!mpd_run_previous(conn)) {
+						printf("No previous song. Aborting\n");
+						exit(handle_error(conn));
+					} else {
+						printf("Previous song: ");
+						print_current_song(conn);
+					}
+				}
+				break;
+			}
+			break;
+		}
+	}
+
+	/* Close connection */
+	mpd_connection_free(conn);
+	printf("Connection terminated\n");
+	return 0;
+}