About Shanmathi

Hi wqrelkkmaf , Sorry for the late reply, somehow missed to post the reply. Regarding  Ques - What's the difference between memset at the end of the loop and calling it before getting sensor data? There is no functional difference, but only recommended to have a clean buffer just before data acquisition. There might be possiblities that the buffer can get corrupted or filled with junk data due to some other memory corruptions/ pointer mishandlings. Thus it is recommended to have it the following way, clean buffer -> get sensor data -> do post processing/ other activities -> again clean buffer -> get data.... instead of get sensor data -> clean buffer ->  do post processing/ other activities -> get data...   ... View more

Hello wqrelkkmaf, The reason for using bufzise is unclear to me. I have modified your code such that it will continously stream the desired sensor values via USB, in the expected format. static void AppControllerFire(void* pvParameters) { BCDS_UNUSED(pvParameters); Retcode_T retcode = RETCODE_OK; Sensor_Value_T sensorValue; // int bufsize = 100; char msg[37] = {0}; // char s[sizeof(msg)*bufsize]; // char *ptr; // ptr = s; TickType_t timer; unsigned long int j = 0; while (1) { // for (int i = 0; i < bufsize; i++) { retcode = Sensor_GetData(&sensorValue); timer = xTaskGetTickCount(); j += 1; if (RETCODE_OK == retcode) { int sz = snprintf(msg,sizeof(msg),"%ld,%ld,%ld,%f;%ldx%ld", (long int) sensorValue.Accel.X, (long int) sensorValue.Accel.Y, (long int) sensorValue.Accel.Z, (double) sensorValue.Noise, (unsigned long int) timer, (unsigned long int) j); // strcpy(ptr,msg); // ptr+=sz; memset(&sensorValue, 0x00, sizeof(sensorValue)); memset(&timer,0x00, sizeof(timer)); vTaskDelay(pdMS_TO_TICKS(0)); } printf("%s\n", msg); // memset(&s,0x00,sizeof(s)); // ptr = s; } if (RETCODE_OK != retcode) { Retcode_RaiseError(retcode); } //vTaskDelay(pdMS_TO_TICKS(APP_CONTROLLER_TX_DELAY)); } } Output: ..... INFO | XDK DEVICE 1: 17,-95,1043,0.001291;15194x1644 INFO | XDK DEVICE 1: 11,-105,1044,0.000556;15203x1645 INFO | XDK DEVICE 1: 13,-118,1040,0.000442;15212x1646 INFO | XDK DEVICE 1: 15,-109,1040,0.000845;15221x1647 INFO | XDK DEVICE 1: *******Light sensor application callback received******* INFO | XDK DEVICE 1: 1,-97,1041,0.002672;15231x1648 INFO | XDK DEVICE 1: 19,-98,1044,0.001244;15239x1649 INFO | XDK DEVICE 1: -10,-96,1047,0.000438;15248x1650 INFO | Port 'COM13' has been disconnected Here are some additional suggestions, it is better to clear the msg buffer before getting sensor data rather than performing memset after printing. Not sure with your exact sue case, but the tick counts (timer variable), need not be reset to 0 everytime. The incremental tick count might be of better usage to know analyse the time taken for transmitting data via USB. With Regards, Shanmathi P   ... View more