2024-09-02 11:06:10 -03:00

121 lines
4.2 KiB
C

// Copyright (c) 2023 Cesanta Software Limited
// All rights reserved
#include "hal.h"
#include "mongoose.h"
static const char *s_url = "mqtt://broker.hivemq.com:1883";
static const char *s_sub_topic = "mg/+/test"; // Publish topic
static const char *s_pub_topic = "mg/clnt/test"; // Subscribe topic
static const uint8_t s_qos = 1; // MQTT QoS
static struct mg_connection *s_conn; // Client connection
void SystemInit(void) { // Called automatically by startup code
clock_init();
rng_init();
}
static volatile uint64_t s_ticks; // Milliseconds since boot
void SysTick_Handler(void) { // SyStick IRQ handler, triggered every 1ms
s_ticks++;
}
uint64_t mg_millis(void) { // Let Mongoose use our uptime function
return s_ticks; // Return number of milliseconds since boot
}
bool mg_random(void *buf, size_t len) { // Use on-board RNG
for (size_t n = 0; n < len; n += sizeof(uint32_t)) {
uint32_t r = rng_read();
memcpy((char *) buf + n, &r, n + sizeof(r) > len ? len - n : sizeof(r));
}
return true;
}
static void fn(struct mg_connection *c, int ev, void *ev_data) {
if (ev == MG_EV_OPEN) {
MG_INFO(("%lu CREATED", c->id));
// c->is_hexdumping = 1;
} else if (ev == MG_EV_ERROR) {
// On error, log error message
MG_ERROR(("%lu ERROR %s", c->id, (char *) ev_data));
} else if (ev == MG_EV_MQTT_OPEN) {
// MQTT connect is successful
struct mg_str subt = mg_str(s_sub_topic);
struct mg_str pubt = mg_str(s_pub_topic), data = mg_str("hello");
MG_INFO(("%lu CONNECTED to %s", c->id, s_url));
struct mg_mqtt_opts sub_opts;
memset(&sub_opts, 0, sizeof(sub_opts));
sub_opts.topic = subt;
sub_opts.qos = s_qos;
mg_mqtt_sub(c, &sub_opts);
MG_INFO(("%lu SUBSCRIBED to %.*s", c->id, (int) subt.len, subt.buf));
struct mg_mqtt_opts pub_opts;
memset(&pub_opts, 0, sizeof(pub_opts));
pub_opts.topic = pubt;
pub_opts.message = data;
pub_opts.qos = s_qos, pub_opts.retain = false;
mg_mqtt_pub(c, &pub_opts);
MG_INFO(("%lu PUBLISHED %.*s -> %.*s", c->id, (int) data.len, data.buf,
(int) pubt.len, pubt.buf));
} else if (ev == MG_EV_MQTT_MSG) {
// When we get echo response, print it
struct mg_mqtt_message *mm = (struct mg_mqtt_message *) ev_data;
MG_INFO(("%lu RECEIVED %.*s <- %.*s", c->id, (int) mm->data.len,
mm->data.buf, (int) mm->topic.len, mm->topic.buf));
} else if (ev == MG_EV_CLOSE) {
MG_INFO(("%lu CLOSED", c->id));
s_conn = NULL; // Mark that we're closed
}
}
// Timer function - recreate client connection if it is closed
static void timer_fn(void *arg) {
struct mg_mgr *mgr = (struct mg_mgr *) arg;
struct mg_mqtt_opts opts = {.clean = true,
.qos = s_qos,
.topic = mg_str(s_pub_topic),
.version = 4,
.message = mg_str("bye")};
if (s_conn == NULL) s_conn = mg_mqtt_connect(mgr, s_url, &opts, fn, NULL);
}
int main(void) {
gpio_input(BUTTON_PIN);
gpio_output(LED_PIN);
uart_init(UART_DEBUG, 115200);
ethernet_init();
MG_INFO(("Starting, CPU freq %g MHz", (double) clock_sys_freq() / 1000000));
struct mg_mgr mgr; // Initialise
mg_mgr_init(&mgr); // Mongoose event manager
mg_log_set(MG_LL_DEBUG); // Set log level
// Initialise Mongoose network stack
struct mg_tcpip_driver_same54_data driver_data = {.mdc_cr = 5};
struct mg_tcpip_if mif = {
.mac = GENERATE_LOCALLY_ADMINISTERED_MAC() /*{2, 3, 4, 5, 6, 7}*/,
// Uncomment below for static configuration:
// .ip = mg_htonl(MG_U32(192, 168, 0, 223)),
// .mask = mg_htonl(MG_U32(255, 255, 255, 0)),
// .gw = mg_htonl(MG_U32(192, 168, 0, 1)),
.driver = &mg_tcpip_driver_same54,
.driver_data = &driver_data};
mg_tcpip_init(&mgr, &mif);
MG_INFO(("MAC: %M. Waiting for IP...", mg_print_mac, mif.mac));
while (mif.state != MG_TCPIP_STATE_READY) {
mg_mgr_poll(&mgr, 0);
}
MG_INFO(("Initialising application..."));
mg_timer_add(&mgr, 3000, MG_TIMER_REPEAT | MG_TIMER_RUN_NOW, timer_fn, &mgr);
MG_INFO(("Starting event loop"));
for (;;) {
mg_mgr_poll(&mgr, 0);
}
return 0;
}