What does a non blocking function mean? Thanks for the help!
while (1) {
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
if (VCP_retrieveInputData(buffer, len) != 0) {
switch (buffer[0]) {
case 'A':// if 'A' command ( command to invoke sending of a 140KB of data to the host PC ) //
/* Disable interrupts */
//__disable_irq();
DWT->CYCCNT = 0; // reset the counter
start = DWT->CYCCNT;// get the core cycle count and store it in start variable
do {
status = CDC_Transmit_FS(ramArray, sizeof(ramArray));// send the 140KB array over the USB to PC
} while (status == USBD_BUSY);
finish = DWT->CYCCNT;// get the core cycle count and store it in finish variable
///__enable_irq();
HAL_Delay(100); // 100ms delay
totalmS = (finish - start); // calculate the time it took in core cycles to send 140KB's
// sprintf(result, " %d start ", start); // calculate transfer speed in bytes/second
// status = CDC_Transmit_FS(result, sizeof(result));// send bytes/second string to PC via FS USB
// HAL_Delay(500);
// sprintf(result, " %d finish ", finish); // calculate transfer speed in bytes/second
// status = CDC_Transmit_FS(result, sizeof(result));// send bytes/second string to PC via FS USB
// HAL_Delay(500);
// CalcTransSpeed function is in the SL-RAT Firmware library file, SLRAT_Firmware.c
sprintf(result, " %d bytes/second ", CalcTransSpeed(totalmS)); // calculate transfer speed in bytes/second
status = CDC_Transmit_FS(result, sizeof(result));// send bytes/second string to PC via FS USB
HAL_Delay(100);
break;
case 'B':// if 'B' command ( command to get the time from RTC and send it on the USB )
RTC_Get(&hrtc, &sTime, &sDate, RTC_FORMAT_BCD); // get the time and date from the RTC
// format the date/time array for displaying time and date in the terminal program
timedate[0] = (sDate.Month / 16) + 48;
timedate[1] = (sDate.Month % 16) + 48;
timedate[2] = '/';
timedate[3] = (sDate.Date / 16) + 48;
timedate[4] = (sDate.Date % 16) + 48;
timedate[5] = '/';
timedate[6] = '2';
timedate[7] = '0';
timedate[8] = (sDate.Year / 16) + 48;
timedate[9] = (sDate.Year % 16) + 48;
timedate[10] = ' ';
timedate[11] = (sTime.Hours / 16) + 48;
timedate[12] = (sTime.Hours % 16) + 48;
timedate[13] = ':';
timedate[14] = (sTime.Minutes / 16) + 48;
timedate[15] = (sTime.Minutes % 16) + 48;
timedate[16] = ':';
timedate[17] = (sTime.Seconds / 16) + 48;
timedate[18] = (sTime.Seconds % 16) + 48;
timedate[19] = 32;
status = CDC_Transmit_FS(timedate, sizeof(timedate));// send it to the host PC via USB
HAL_Delay(1000);
break;
}
}
}
