Part Number:TMS320F28075
Tool/software: Code Composer Studio
Hi
Processor is an TMS320F28075PZPT,
first I use target configurations to test connection, get result is succeeded.
and then I load image will get a error information shown below:
C28xx_CPU1: Error connecting to the target: (Error -1015 @ 0x0) Device is not responding to the request. Device may be locked, or the debug probe connection may be unreliable. Unlock the device if
possible (e.g. use wait in reset mode, and power-cycle the board). If error persists, confirm configuration and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 7.0.48.0)
C28xx_CPU1: Error connecting to the target: (Error -1135 @ 0x0) The debug probe reported an error. Confirm debug probe configuration and connections, reset the debug probe, and retry the operation.
(Emulation package 7.0.48.0)
I try the method form network address , but not solve my problem.
software-dl.ti.com/.../ccsv7_debugging_jtag_connectivity_issues.html
I describe my F28075 some pin connect situation:
TMS: when load image this pin have signal.
TDI: when load image this pin have signal.
TDO: have a 2.2k ohms pull high 3.3V. when load image this pin have signal.
TCK: when load image this pin have signal.
nReset: when load image this pin have signal.
VDDIO: No noise in load image.
VDD: serial a 10uF pull low to GND.
nXRS: serial a 2.2k ohms pull high to 3.3V.
VREGENZ: serial a 0 ohm pull low to GND.
VDDOSC: serial a 0.1uF pull low to GND.
VSSOSC: direct pull low to GND.
X1: serial a 0 ohm pull low to GND.
VDDA: No noise in load image.
VSSA: serial a 1uF pull low to GND.
GPIO72: serial a 2.2k ohms pull high to 3.3V.
GPIO84: serial a 2.2k ohms pull high to 3.3V.
I already do some test, but not effect:
1. change XDS100 circuit and wire.
2. check F28075's all pin is connect to circuit.
3. change a new F28075 IC.
4. use uniflash to load image.
5. let F28075 work in wait boot mode but have same error too.
6. VREGENZ pin pull high to 3.3V, and add 1.2V to all VDD pin.
7. VDDOSC pin connet to 3.3V.
But I have a discovery when I compare the waveform from F28075 and F28035.
When F28035's JTAG pull nReset pin to low will stop 250usec low / 27.5msec high signal in nRXS pin, but F28075 can’t, so I guess it is make my problem’s murderer. but I don’t kwon how to solve this problem.
please help me.
Best Regards,
Don