tth
9 months ago
9 changed files with 165 additions and 44 deletions
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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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\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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#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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