tth
1 year ago
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\chapter{I/O control}
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\label{chap:ioctl} \index{ioctl}
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Un des paradigmes les plus connus à propos des systèmes de la
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famille Unix est : \textsf{Tout est vu comme un fichier}.
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C'est souvent vrai, mais parfois ce n'est pas suffisant.
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Prenons rapidement un exemple, le baton de joie\index{joystick}
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dans Linux.
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\begin{verbatim}
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int foo, joy_fd;
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struct js_event js;
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char joy_name[128];
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joy_fd = open(joy_device , O_RDONLY);
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\end{verbatim}
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% =========================================================
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Ailleurs dans ce document : Ports série (p. \pageref{rs232})
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% =========================================================
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@ -0,0 +1,37 @@
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\chapter{Sofware Defined Radio}
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\label{chap:sdr} \index{sdr}
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Beaucoup d'empirisme danc ce chapitre.
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Tout d'abord, le matériel à ma disposition~:
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\begin{verbatim}
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Bus 004 Device 010: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
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\end{verbatim}
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Ensuite, le premier hack, dont je n'ai pas encore bien capté
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la raison~:
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\begin{verbatim}
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$ cat /etc/modprobe.d/blacklist-dvb_usb_rtl28xxu.conf
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# added by tth
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blacklist dvb_usb_rtl28xxu
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\end{verbatim}
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% ===================================================
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\section{CubicSDR}
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\begin{quote}
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CubicSDR is a cross-platform Software Defined Radio application which
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allows you to navigate the radio spectrum and demodulate any signals
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you might discover. It currently includes several common analog
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demodulation schemes such as AM and FM and will support digital modes
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in the future.
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SDR hardware is accessed through SoapySDR and therefore any
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hardware for which a SoapySDR module exists can be used as a receiver
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with CubicSDR.
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\end{quote}
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% ===================================================
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@ -1,33 +0,0 @@
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#include <forms.h>
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int main(int argc, char *argv[]) {
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FL_FORM *form;
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FL_OBJECT *yes,
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*no,
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*but;
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fl_initialize(&argc, argv, "FormDemo", 0, 0);
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form = fl_bgn_form(FL_UP_BOX, 320, 120);
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fl_add_box(FL_BORDER_BOX, 160, 40, 0, 0, \
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"Do you want to Quit?");
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yes = fl_add_button(FL_NORMAL_BUTTON, \
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40, 70, 80, 30, "Yes");
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no = fl_add_button(FL_NORMAL_BUTTON, \
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200, 70, 80, 30, "No");
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fl_end_form();
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fl_show_form(form, FL_PLACE_MOUSE, FL_TRANSIENT, \
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"Question");
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while (1) {
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if (fl_do_forms() == yes {
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printf("Yes is pushed\n");
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break;
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}
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else printf("No is pushed\n");
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}
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fl_finish();
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return 0;
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}
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