First of all I wanted to wish everyone here a happy new year!
However new year -> new problems!
I have got my board with the FX3 now and have detected a problem with the clock or the UART baudrate.
I am using a 26MHz clock and not a 19,2 MHz crystal. The FSLC-Pins are "101" as described in the datasheet. I can load software to the FX3 via USB and via J-Link Debugger.
However the UART does not work, because the baudrate is not correct. It should be 115200 Baud but it is 156000 Baud (measured with a scope). This is 115200 * (26/19.2). This looks like the baudrate is calculated on a 19.2MHz base.
To find a solution, I have modified the startup code a little bit to:
CyU3PSysClockConfig_t clkCfg;
uint32_t sysclk;
CyU3PPartNumber_t partnumber;
/* Initialize the device */
clkCfg.setSysClk400 = CyTrue;
clkCfg.cpuClkDiv = 2;
clkCfg.dmaClkDiv = 2;
clkCfg.mmioClkDiv = 2;
clkCfg.useStandbyClk = CyTrue;
clkCfg.clkSrc = CY_U3P_SYS_CLK;
status = CyU3PDeviceInit (&clkCfg);
if (status != CY_U3P_SUCCESS)
{
goto handle_fatal_error;
}
status = CyU3PDeviceGetSysClkFreq (&sysclk);
if (status != CY_U3P_SUCCESS)
{
goto handle_fatal_error;
}
partnumber = CyU3PDeviceGetPartNumber();
However this makes no difference to CyU3PDeviceInit (NULL).
The CyU3PDeviceGetSysClkFreq returns a SysClock of 403.2 MHz. This should be 416 MHz with a 26 MHz clock. Looks like the configuration pins are not detected correctly, but I have checked them several times.
At least the partnumber is returned correctly as CYPART_USB3014.
I have also a problem with the default VID/PID of the part. This is not 04B4/00F3 but 1480/0000. I have found an article that this is the case with an old revision of the chip. As mentioned, I have modified the Inf-File for this VID/PID. Though my board is pretty new, the chips seem to be pretty old. They are labeled:
CYUSB3014-BZX
I 1149
A 33 PHI
CYP657132
Do I have to expect other problems with this revision? When I am ordering new chips, how can I find out, that I get actual parts?
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