/* Outputs a string on the debug UART */
void Board_UARTPutSTR(char *str)
{
#if defined(DEBUG_UART)
while (*str != '\0') {
Board_UARTPutChar(*str++);
}
#endif
}
/* Function to do the read/write to USB Disk */
static void throughputTest(void)
{
FRESULT rc; /* Result code */
UINT br;
f_mount(0, &fatFS); /* Register volume work area (never fails) */
rc = f_open(&fileObj, "test.bin", FA_READ);
if (rc) {
DEBUGOUT("Unable to open big_file.bin from USB Disk\r\n");
die(rc);
}
int frameReads;
uint32_t readTimes[MAX_FRAME_READS];
Chip_TIMER_Enable(RUNTIME_TIMER);
for(frameReads = 0; frameReads < MAX_FRAME_READS; ++frameReads)
{
RUNTIME_TIMER->TC = 0;
/* Read a chunk of file */
rc = f_read(&fileObj, frameBuffer, FRAME_SIZE, &br);
if(rc != FR_OK)
{
DEBUGOUT("Error reading from file\r\n");
die(rc);
}
else if(br != FRAME_SIZE)
{
break;
}
readTimes[frameReads] = RUNTIME_TIMER->TC;
Board_UARTPutChar('.');
}
f_close(&fileObj);
uint64_t sum = 0;
uint32_t min = UINT32_MAX;
uint32_t max = 0;
float ave;
for(int i = 0; i < frameReads; ++i)
{
sum += readTimes[i];
if(readTimes[i] < min)
min = readTimes[i];
if(readTimes[i] > max)
max = readTimes[i];
}
ave = (float)sum / (float)frameReads;
printf("\n----------------------------\n");
printf("Test Results\n");
printf("----------------------------\n");
printf("\tFrames read: %d\n", frameReads);
printf("\tFrame size: %.3fkB\n", (float)FRAME_SIZE / 1000.0);
printf("\tMin time: %.3fus\n", (float)min * PCLK_US);
printf("\tMax time: %.3fus\n", (float)max * PCLK_US);
printf("\tAve time: %.3fus\n", (float)ave * PCLK_US);
printf("\n----------------------------\n");
printf("All times\n");
printf("----------------------------\n");
for(int i = 0; i < frameReads; ++i)
{
printf("\t%02d: %.3fus\n", i, (float)readTimes[i] * PCLK_US);
}
printf("----------------------------\n\n");
DEBUGOUT("\r\nTest completed.\r\n");
USB_Host_SetDeviceConfiguration(FlashDisk_MS_Interface.Config.PortNumber, 0);
}
