From 7be3db60a0efba40a0c10a4476490a05fa62a1bc Mon Sep 17 00:00:00 2001
From: Ludovic Pouzenc <ludovic@pouzenc.fr>
Date: Thu, 17 May 2012 18:41:13 +0000
Subject: 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
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git-svn-id: file:///var/svn/2012-violon-leds/trunk@2 6be1fa4d-33ac-4c33-becc-79fcb3794bb6
---
 tests/test2/notes.txt | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 tests/test2/notes.txt

(limited to 'tests/test2/notes.txt')

diff --git a/tests/test2/notes.txt b/tests/test2/notes.txt
new file mode 100644
index 0000000..96a702e
--- /dev/null
+++ b/tests/test2/notes.txt
@@ -0,0 +1,78 @@
+
+
+ENTTEC OPEN DMX USB
+
+lsusb | grep FT232
+Bus 004 Device 005: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
+
+
+On peut communiquer avec ce périphérique Série via la libftdi
+
+i   libftdi1                                                                          - Library to control and program the FTDI USB controller 
+
+
+Dans l'ordre :
+
+#include <time.h>
+
+static const int VID = 0x0403; //! FTDI Vendor ID
+static const int PID = 0x6001; //! FTDI Product ID
+
+// One "official" DMX frame can take (1s/44Hz) = 22727272ns
+#define DMX_FRAMETIME 22727272
+#define DMX_BREAK 110000
+#define DMX_MAB 16000
+#define DMX_CHANNELS 512
+
+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/1e9
+	res.tv_nsec=res.tv_nsec%1e9;
+	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+=1e9;
+	if (res.tv_nsec>0 && res.tv_sec<0) res.tv_nsec-=1e9; res.tv_sec++;
+}
+
+
+ftdi_usb_find_all(&ftdi, &list, QLCFTDI::VID, QLCFTDI::PID);
+
+ftdi_usb_open_desc(&m_handle, QLCFTDI::VID, QLCFTDI::PID, name().toAscii(), serial().toAscii())
+ftdi_usb_reset(&m_handle)
+ftdi_set_baudrate(&m_handle, 250000)
+ftdi_set_line_property(&m_handle, BITS_8, STOP_BIT_2, NONE)
+ftdi_setflowctrl(&m_handle, SIO_DISABLE_FLOW_CTRL)
+ftdi_usb_purge_buffers(&m_handle)
+ftdi_setrts(&m_handle, 0)
+
+frame_time.tv_sec=0;
+frame_time.tv_nsec=DMX_FRAMETIME;
+
+// Attente initiale (juste après ouverture periph)
+to_sleep.tv_sec=0;
+to_sleep.tv_nsec=1e6;
+nanosleep(to_sleep,NULL);
+
+
+clock_gettime(CLOCK_MONOTONIC, now);
+
+ts_diffadd(to_sleep,frame_time,now,trame_begin);
+nanosleep(to_sleep);
+
+clock_gettime(CLOCK_MONOTONIC, trame_begin);
+ftdi_set_line_property2(&m_handle, BITS_8, STOP_BIT_2, NONE, BREAK_ON)
+usleep(DMX_BREAK); 
+ftdi_set_line_property2(&m_handle, BITS_8, STOP_BIT_2, NONE, BREAK_OFF)
+usleep(DMX_MAB);
+m_ftdi->write(m_universe)
+ftdi_write_data(&m_handle, m_universe, sizeof(m_universe))
+
+
+
+ftdi_usb_close(&m_handle) 
+
+
+
+rq : si résultat <0, affichage erreur avec ftdi_get_error_string(&m_handle)
-- 
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