CrankStoryboardSuite汽车仪表盘sample代码

/* * Copyright 2017, Crank Software Inc. All Rights Reserved. * * For more information email info@cranksoftware.com. */ #include <stdio.h> #include <string.h> #include <stdlib.h> #include <inttypes.h> #ifdef WIN32 #include <windows.h> #else #include <unistd.h> // for usleep #endif #include "greio.h" #define CLUSTER_UPDATE_EVENT "cluster_update" #define CLUSTER_UPDATE_FMT "2u1 speed 2u1 rpm 2u1 fuel 2u1 battery 2u1 oil 2u1 odometer 2u1 trip" // Cluster update data structure typedef struct cluster_update_event { uint16_t speed; uint16_t rpm; uint16_t fuel; uint16_t battery; uint16_t oil; uint16_t odometer; uint16_t trip; } cluster_update_event_t; /** * cross-platform sleep */ void sleep_ms(int milliseconds) { #ifdef WIN32 Sleep(milliseconds); #else usleep(milliseconds * 1000); #endif } int main(int argc, char **argv) { gre_io_t *send_handle; gre_io_serialized_data_t *nbuffer = NULL; cluster_update_event_t event_data; int ret; // Connect to a channel to send messages (write) send_handle = gre_io_open("cluster", GRE_IO_TYPE_WRONLY); if (send_handle == NULL) { fprintf(stderr, "Can't open send channel\n"); return 0; } memset(&event_data, 0, sizeof(event_data)); while(1) { // Simulate data acquisition ... sleep_ms(80); event_data.speed = (event_data.speed + 1) % 200; event_data.rpm = (event_data.rpm + 50) % 10000; // Serialize the data to a buffer nbuffer = gre_io_serialize(nbuffer, NULL, CLUSTER_UPDATE_EVENT, CLUSTER_UPDATE_FMT, &event_data, sizeof(event_data)); if (!nbuffer) { fprintf(stderr, "Can't serialized data to buffer, exiting\n"); break; } // Send the serialized event buffer ret = gre_io_send(send_handle, nbuffer); if (ret < 0) { fprintf(stderr, "Send failed, exiting\n"); break; } } //Release the buffer memory, close the send handle gre_io_free_buffer(nbuffer); gre_io_close(send_handle); return 0; }