Keuronde/PicoW_WifiAP_UDP_in_out
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Ajout de la fonction UDP beacon

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This commit is contained in:
Samuel 2026-01-31 21:28:47 +01:00
parent 573411974a
commit c1ea843094
1 changed files with 46 additions and 0 deletions
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46
picow_access_point.c
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@ -42,6 +42,51 @@ typedef struct TCP_CONNECT_STATE_T_ {
ip_addr_t *gw;
} TCP_CONNECT_STATE_T;
#define UDP_PORT 47269
#define BEACON_MSG_LEN_MAX 127
#define BEACON_TARGET "192.168.4.16"
#define BEACON_INTERVAL_MS 1000
void run_udp_beacon() {
struct udp_pcb* pcb = udp_new();
ip_addr_t addr;
ipaddr_aton(BEACON_TARGET, &addr);
int counter = 0;
while (true) {
struct pbuf *p = pbuf_alloc(PBUF_TRANSPORT, BEACON_MSG_LEN_MAX+1, PBUF_RAM);
char *req = (char *)p->payload;
memset(req, 0, BEACON_MSG_LEN_MAX+1);
snprintf(req, BEACON_MSG_LEN_MAX, "counter:%d\n", counter);
err_t er = udp_sendto(pcb, p, &addr, UDP_PORT);
pbuf_free(p);
if (er != ERR_OK) {
printf("Failed to send UDP packet! error=%d\n", er);
} else {
printf("Sent packet %d\n", counter);
counter++;
}
// Note in practice for this simple UDP transmitter,
// the end result for both background and poll is the same
#if PICO_CYW43_ARCH_POLL
// if you are using pico_cyw43_arch_poll, then you must poll periodically from your
// main loop (not from a timer) to check for Wi-Fi driver or lwIP work that needs to be done.
cyw43_arch_poll();
sleep_ms(BEACON_INTERVAL_MS);
#else
// if you are not using pico_cyw43_arch_poll, then WiFI driver and lwIP work
// is done via interrupt in the background. This sleep is just an example of some (blocking)
// work you might be doing.
sleep_ms(BEACON_INTERVAL_MS);
#endif
}
}
static err_t tcp_close_client_connection(TCP_CONNECT_STATE_T *con_state, struct tcp_pcb *client_pcb, err_t close_err) {
if (client_pcb) {
assert(con_state && con_state->pcb == client_pcb);
@ -333,6 +378,7 @@ int main() {
state->complete = false;
while(!state->complete) {
run_udp_beacon();
// the following #ifdef is only here so this same example can be used in multiple modes;
// you do not need it in your code
#if PICO_CYW43_ARCH_POLL