Ajout des premiers bouts de code pour les tests :

test1 = prise de son via pulse audio (à l'arache avec le modèle "simple")
test2 = premières illuminations avec le projo LED
test3 = fade R/G/B et jeu avec les problématiques de timing
test4 = à faire : Appli GTK pour assembler les tests précédents


git-svn-id: file:///var/svn/2012-violon-leds/trunk@2 6be1fa4d-33ac-4c33-becc-79fcb3794bb6

2 files changed, 192 insertions, 0 deletions

diff --git a/tests/test3/compil.sh b/tests/test3/compil.sh
new file mode 100755
index 0000000..023d012
--- /dev/null
+++ b/tests/test3/compil.sh
@@ -0,0 +1 @@
+gcc -g -o test2 test2.c -lftdi -lrt
diff --git a/tests/test3/test3.c b/tests/test3/test3.c
new file mode 100644
index 0000000..301ea49
--- /dev/null
+++ b/tests/test3/test3.c
@@ -0,0 +1,191 @@
+#include <ftdi.h>
+#include <time.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// FTDI Vendor ID
+#define VID 0x0403
+// FTDI Product ID
+#define PID 0x6001
+
+#define DMX_CHANNELS 6
+//#define DMX_CHANNELS 512
+//#define DMX_FRAMETIME 24000000
+#define DMX_FRAMETIME 0
+#define DMX_BREAK 110000
+#define DMX_MAB 16000
+
+#define MAX_STR 64
+
+inline void ts_diffadd(struct timespec *res, struct timespec *a, struct timespec *b, struct timespec *c) {
+        time_t rem;
+
+        res->tv_nsec=a->tv_nsec-b->tv_nsec+c->tv_nsec;
+        rem=res->tv_nsec/1000000000;
+        res->tv_nsec=res->tv_nsec%1000000000;
+        res->tv_sec=a->tv_sec-b->tv_sec+c->tv_sec+rem;
+
+        if (res->tv_nsec<0 && res->tv_sec>0) { res->tv_sec--; res->tv_nsec+=1000000000; }
+        if (res->tv_nsec>0 && res->tv_sec<0) { res->tv_nsec-=1000000000; res->tv_sec++; }
+}
+
+void e(int res, const char *funcname, struct ftdi_context *ftdi, int exit_val) {
+	char *reason;
+
+	if ( res < 0 ) {
+		reason=ftdi_get_error_string(ftdi);
+		fprintf(stderr, "Error in %s : %s\n", funcname, reason);
+		exit(exit_val);
+	}
+
+}
+
+/*
+struct ftdi_device_list
+{
+    // pointer to next entry
+    struct ftdi_device_list *next;
+    // pointer to libusb's usb_device
+    struct usb_device *dev;
+}
+*/
+
+int dmx_universe_write(struct ftdi_context *ftdi, char *universe, int uni_len) {
+	static struct timespec ts_frame_time={0,DMX_FRAMETIME},ts_dmx_break={0,DMX_BREAK}, ts_dmx_mab={0,DMX_MAB}, ts_trame_begin={0,0};
+	struct timespec ts_to_sleep, ts_now;
+
+	// http://www.opendmx.net/index.php/DMX512-A#Timings
+	// http://www.erwinrol.com/?s=dmx
+	// symbo_perdiod is 4us (250kHz)
+	// Full packet minimal timing : DMX_BREAK+DMX_MAB+(1+8+2)*513*symbol_period=22698us
+
+	ftdi_async_complete(ftdi,0);
+	// Wait the end of the previous timeslot
+/*
+	clock_gettime(CLOCK_MONOTONIC, &ts_now);
+	ts_diffadd(&ts_to_sleep,&ts_frame_time,&ts_now,&ts_trame_begin);
+
+	//fprintf(stderr, "DEBUG : ts_to_sleep==%li.%09li\n", ts_to_sleep.tv_sec, ts_to_sleep.tv_nsec);
+//	ts_to_sleep.tv_sec=0;
+//	ts_to_sleep.tv_nsec=23000000;
+	nanosleep(&ts_to_sleep,NULL);
+
+	clock_gettime(CLOCK_MONOTONIC, &ts_trame_begin);
+*/
+	e(ftdi_set_line_property2(ftdi, BITS_8, STOP_BIT_2, NONE, BREAK_ON),"ftdi_set_line_property2",ftdi,30);
+	nanosleep(&ts_dmx_break,NULL);
+	e(ftdi_set_line_property2(ftdi, BITS_8, STOP_BIT_2, NONE, BREAK_OFF),"ftdi_set_line_property2",ftdi,31);
+	nanosleep(&ts_dmx_mab,NULL);
+
+
+	//return ftdi_write_data(ftdi, universe, uni_len);
+	return ftdi_write_data_async(ftdi, universe, uni_len);
+}
+
+int main() {
+	int i,res;
+
+	char *manufacturer, *description, *serial;
+	char universe[DMX_CHANNELS+1];
+
+	struct ftdi_context ftdi;
+	struct ftdi_device_list *devlist=NULL;
+	struct usb_device *dev=NULL;
+
+	struct timespec ts_to_sleep;
+
+	(void) memset(universe, 0, sizeof(universe));
+	(void) memset(&ftdi, 0, sizeof(ftdi));
+
+	manufacturer=malloc(MAX_STR);
+	description=malloc(MAX_STR);
+	serial=malloc(MAX_STR);
+
+	e(ftdi_init(&ftdi),"ftdi_init",&ftdi,10);
+	e(ftdi_usb_find_all(&ftdi, &devlist, VID, PID),"ftdi_usb_find_all",&ftdi,11);
+
+	//Always take the first device
+	if (devlist==NULL || devlist->dev==NULL) {
+		fprintf(stderr, "No usb device detected (looking for USB ID 0x%04X:0x%04X)\n", VID, PID);
+		exit(2);
+	}
+	dev=devlist->dev;
+
+//	fprintf(stderr, "DEBUG : next==%p\n", devlist->next);
+	
+	e(ftdi_usb_get_strings(&ftdi, dev, manufacturer, MAX_STR, description, MAX_STR, serial, MAX_STR),"ftdi_usb_get_strings",&ftdi,12);
+	fprintf(stderr, "Connecting to USB device ('%s','%s','%s')\n", manufacturer, description, serial);
+	e(ftdi_usb_open_dev(&ftdi,dev),"ftdi_usb_open_dev",&ftdi,13);
+	fprintf(stderr, "Connected\n");
+	
+	//Init the device
+	e(ftdi_usb_reset(&ftdi),"ftdi_usb_reset",&ftdi,15);
+	e(ftdi_set_baudrate(&ftdi, 250000),"ftdi_set_baudrate",&ftdi,16);
+	e(ftdi_set_line_property(&ftdi, BITS_8, STOP_BIT_2, NONE),"ftdi_set_line_property",&ftdi,17);
+	e(ftdi_setflowctrl(&ftdi, SIO_DISABLE_FLOW_CTRL),"ftdi_setflowctrl",&ftdi,18);
+	e(ftdi_usb_purge_buffers(&ftdi),"ftdi_usb_purge_buffers",&ftdi,19);
+	e(ftdi_setrts(&ftdi, 0),"ftdi_setrts",&ftdi,20);
+
+	// 1ms pause for initialization completion
+	ts_to_sleep.tv_sec=0;
+	ts_to_sleep.tv_nsec=1000000;
+	nanosleep(&ts_to_sleep,NULL);
+
+//	fprintf(stderr, "DEBUG : res==%i\n", res);
+//	fprintf(stderr, "DEBUG : universe==%s\n", universe);
+	//for(i=1;i<=256;i=i<<1) {
+	for(i=1;i<=256;i++) {
+		universe[2]=i-1;
+		universe[3]=0;
+		universe[4]=0;
+		res=dmx_universe_write(&ftdi, universe, DMX_CHANNELS);
+	}
+	//for(i=1;i<=256;i=i<<1) {
+	for(i=1;i<=256;i++) {
+		universe[2]=256-i;
+		universe[3]=0;
+		universe[4]=0;
+		res=dmx_universe_write(&ftdi, universe, DMX_CHANNELS);
+	}
+	//for(i=1;i<=256;i=i<<1) {
+	for(i=1;i<=256;i++) {
+		universe[2]=0;
+		universe[3]=i-1;
+		universe[4]=0;
+		res=dmx_universe_write(&ftdi, universe, DMX_CHANNELS);
+	}
+	//for(i=1;i<=256;i=i<<1) {
+	for(i=1;i<=256;i++) {
+		universe[2]=0;
+		universe[3]=256-i;
+		universe[4]=0;
+		res=dmx_universe_write(&ftdi, universe, DMX_CHANNELS);
+	}
+	//for(i=1;i<=256;i=i<<1) {
+	for(i=1;i<=256;i++) {
+		universe[2]=0;
+		universe[3]=0;
+		universe[4]=i-1;
+		res=dmx_universe_write(&ftdi, universe, DMX_CHANNELS);
+	}
+	//for(i=1;i<=256;i=i<<1) {
+	for(i=1;i<=256;i++) {
+		universe[2]=0;
+		universe[3]=0;
+		universe[4]=256-i;
+		res=dmx_universe_write(&ftdi, universe, DMX_CHANNELS);
+	}
+
+	e(ftdi_usb_close(&ftdi),"ftdi_usb_close",&ftdi,50);
+	ftdi_list_free(&devlist);
+	ftdi_deinit(&ftdi);
+
+
+	free(manufacturer);
+	free(description);
+	free(serial);
+
+	exit(0);
+}
+