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Hi All, I try to debug two application at the same time, one is run on Host CPU (8051) and another is on DSP (6711). For debuging the DSP software I use XPS510PP_PLUS emulator via JTAG interface. The Host CPU is connected to DSP over HPI. Problem: When I try to access DSP over HPI on my Host CPU, I can't read or write any locations while JTAG emulator is connected. And it seems that DSP don't ready (HRDY is always high when I try to pull HCS to low)! To have it working I have to disconnect JTAG emulator from DSP and hardware reset it. After that everithing works fine. But I need to debug data exchange between Host CPU and DSP! Q1: Is it possible to use JTAG emulator and HPI at the same time? Q2: Is it possible to reset DSP via HPI or I have to use hardware reset? Thanks Veniamin Milevski

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Veniamin- Try running the DSP from CCS until a breakpoint or manual stop, that should allow HPI to operate. Perform some host communication. Then stop at a breakpoint -- see if the host data is there or not. HPI on the C6xxx series uses an internal (dedicated) DMA channel, so if you stop the processor, you stop DMA, and nothing will happen. Jeff Brower DSP sw/hw engineer Signalogic veniamin2002se wrote: > > Hi All, > > I try to debug two application at the same time, one is run on Host > CPU (8051) and another is on DSP (6711). > For debuging the DSP software I use XPS510PP_PLUS emulator via JTAG > interface. The Host CPU is connected to DSP over HPI. > > Problem: > When I try to access DSP over HPI on my Host CPU, I can't read or > write any locations while JTAG emulator is connected. And it seems > that DSP don't ready (HRDY is always high when I try to pull HCS to > low)! > > To have it working I have to disconnect JTAG emulator from DSP and > hardware reset it. After that everithing works fine. But I need to > debug data exchange between Host CPU and DSP! > > Q1: Is it possible to use JTAG emulator and HPI at the same time? > Q2: Is it possible to reset DSP via HPI or I have to use hardware > reset? > > Thanks > Veniamin Milevski

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Veniamin- > Thank you, I have try already but it don't work anyway :( Then something else is wrong. HPI + JTAG should be compatible, as would be any peripheral or chip function + JTAG. Jeff Brower DSP sw/hw engineer Signalogic > -----Original Message----- > From: Jeff Brower [mailto:] > Sent: den 11 juni 2002 15:49 > To: Veniamin Milevski > Cc: > Subject: Re: [c6x] HPI and JTAG did not want to work together !? > > Veniamin- > > Try running the DSP from CCS until a breakpoint or manual stop, that should > allow HPI > to operate. Perform some host communication. Then stop at a breakpoint -- > see if > the host data is there or not. HPI on the C6xxx series uses an internal > (dedicated) > DMA channel, so if you stop the processor, you stop DMA, and nothing will > happen. > > Jeff Brower > DSP sw/hw engineer > Signalogic > > veniamin2002se wrote: > > > > Hi All, > > > > I try to debug two application at the same time, one is run on Host > > CPU (8051) and another is on DSP (6711). > > For debuging the DSP software I use XPS510PP_PLUS emulator via JTAG > > interface. The Host CPU is connected to DSP over HPI. > > > > Problem: > > When I try to access DSP over HPI on my Host CPU, I can't read or > > write any locations while JTAG emulator is connected. And it seems > > that DSP don't ready (HRDY is always high when I try to pull HCS to > > low)! > > > > To have it working I have to disconnect JTAG emulator from DSP and > > hardware reset it. After that everithing works fine. But I need to > > debug data exchange between Host CPU and DSP! > > > > Q1: Is it possible to use JTAG emulator and HPI at the same time? > > Q2: Is it possible to reset DSP via HPI or I have to use hardware > > reset? > > > > Thanks > > Veniamin Milevski

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