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Thanks for reply. Is there any software which can log the received data from micro controller 18PIC2550 in computer ?
No. Virtual COM port baud rate has only a meaning if you connect to a real UART device and rely on setting standard Windows baud rates through SetCommState() API function. An USB device without real UART will simply ignore the baud rate set requests.By using the USB interface as a virtual com port you will be limited to 926100 baud which is 0.09261 MB/S
No. Virtual COM port baud rate has only a meaning if you connect to a real UART device and rely on setting standard Windows baud rates through SetCommState() API function. An USB device without real UART will simply ignore the baud rate set requests.
USB-to-UART bridges can set non-standard baud rates through SetCommState() by redefining Windows baud rate (review respective FTDI instructions) or using vendor specific USB drivers like the FTDI D2XX to connect to the device.
The terminal programs don't care for the baud rate, except for setting it in USB device.
I read from the data sheet of PIC18F2550 that USB module require Primary Clock i.e., external clock source of 48 MHz for Full Speed operation.
I am wondering if I can use QX3 HCMOS Clock Oscillator to get 48 MHz frequency for USB module. I don't see any circuit in the data sheet to tune or set the frequency to 48 MHz. Any suggestions or comments ?
multipliers ? I guess we can divide the clock by a factor of two and so on but multiplying a clock I am not sure if it is really possible. Let's take an example of PIC18F2550 which need clock source of 48 MHz for Full Speed USB operation. The internal clock is 8 MHz. Can we get 48 MHz internally by using multipliers ?
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