servicepoint/servicepoint-binding-c
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fix readme

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Vinzenz Schroeter 2025-06-28 20:23:23 +02:00
parent ff9b0a9dc8
commit 0344c0bdcf
3 changed files with 46 additions and 9 deletions
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20
README.md
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@ -1,11 +1,11 @@
# servicepoint_binding_c
[![Release](https://git.berlin.ccc.de/servicepoint/servicepoint_binding_c/badges/release.svg)](https://git.berlin.ccc.de/servicepoint/servicepoint_binding_c/releases)
[![Release](https://git.berlin.ccc.de/servicepoint/servicepoint-binding-c/badges/release.svg)](https://git.berlin.ccc.de/servicepoint/servicepoint-binding-c/releases)
[![crates.io](https://img.shields.io/crates/v/servicepoint_binding_c.svg)](https://crates.io/crates/servicepoint)
[![Crates.io Total Downloads](https://img.shields.io/crates/d/servicepoint_binding_c)](https://crates.io/crates/servicepoint)
[![docs.rs](https://img.shields.io/docsrs/servicepoint_binding_c)](https://docs.rs/servicepoint/latest/servicepoint/)
[![GPLv3 licensed](https://img.shields.io/crates/l/servicepoint_binding_c)](./LICENSE)
[![CI](https://git.berlin.ccc.de/servicepoint/servicepoint_binding_c/badges/workflows/rust.yml/badge.svg)](https://git.berlin.ccc.de/servicepoint/servicepoint_binding_c)
[![CI](https://git.berlin.ccc.de/servicepoint/servicepoint-binding-c/badges/workflows/rust.yml/badge.svg)](https://git.berlin.ccc.de/servicepoint/servicepoint-binding-c)
In [CCCB](https://berlin.ccc.de/), there is a big pixel matrix hanging on the wall.
It is called "Service Point Display" or "Airport Display".
@ -19,18 +19,22 @@ This crate contains C bindings for the [servicepoint](https://git.berlin.ccc.de/
#include "servicepoint.h"
int main(void) {
SPConnection *connection = sp_connection_open("172.23.42.29:2342");
UdpSocket *connection = sp_udp_socket_open("172.23.42.29:2342");
if (connection == NULL)
return 1;
SPBitmap *pixels = sp_bitmap_new(SP_PIXEL_WIDTH, SP_PIXEL_HEIGHT);
Bitmap *pixels = sp_bitmap_new(PIXEL_WIDTH, PIXEL_HEIGHT);
sp_bitmap_fill(pixels, true);
SPCommand *command = sp_command_bitmap_linear_win(0, 0, pixels, Uncompressed);
while (sp_connection_send_command(connection, sp_command_clone(command)));
BitmapCommand *command = sp_bitmap_command_new(pixels, 0, 0, COMPRESSION_CODE_LZMA);
Packet *packet = sp_bitmap_command_try_into_packet(command);
if (packet == NULL)
return 1;
if (!sp_udp_socket_send_packet(connection, packet))
return 1;
sp_command_free(command);
sp_connection_free(connection);
sp_udp_socket_free(connection);
return 0;
}
```

2
example/Makefile
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@ -96,7 +96,7 @@ endif
# ADD NEW EXAMPLES HERE
_c_src := src/announce.c src/brightness_tester.c src/header_logger.c \
src/moving_line.c src/random_stuff.c src/wiping_clear.c src/undefined.c
src/moving_line.c src/random_stuff.c src/wiping_clear.c src/undefined.c src/flut.c
_programs := $(basename $(notdir $(_c_src)))
_bins := $(_programs)
_unstripped_bins := $(addsuffix _unstripped, $(_bins))

33
example/src/flut.c Normal file
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@ -0,0 +1,33 @@
#include <stdio.h>
#include <signal.h>
#include "servicepoint.h"
volatile bool aborted = false;
void handle_sigint(int sig) {
(void)sig; // suppress unused warning
aborted = true;
}
int main(void) {
UdpSocket *connection = sp_udp_socket_open("172.23.42.29:2342");
if (connection == NULL)
return 1;
Bitmap *pixels = sp_bitmap_new(PIXEL_WIDTH, PIXEL_HEIGHT);
sp_bitmap_fill(pixels, true);
BitmapCommand *command = sp_bitmap_command_new(pixels, 0, 0, COMPRESSION_CODE_LZMA);
Packet *packet = sp_bitmap_command_try_into_packet(command);
signal(SIGINT, handle_sigint);
size_t packets_sent = 0;
while (!aborted && sp_udp_socket_send_packet(connection, sp_packet_clone(packet))) {
++packets_sent;
}
printf("packets sent: %zu\n", packets_sent);
sp_packet_free(packet);
sp_udp_socket_free(connection);
return 0;
}