section 7 - Index of
section 7 - Index of section 7 - Index of
The external command controller acts as the medium between the DSP56K target systemand a host computer. The external command controller circuit acts as a DSP56K serialdebug port driver and host computer command interpreter. The controller issues commandsbased on the host computer inputs from a user interface program which communicateswith the user.10.11 USING THE OnCEThe following notations are used:ACK = Wait for acknowledge on the DSO pinClK = Issue 24 clocks to read out data from the selected register10.11.1 Begin Debug ActivityMost of the debug activities have the following beginning:-1. ACK2. Save pipeline information:a. Send command READ PDS REGISTER (10001001)b. ACKc. ClKd. Send command READ Pil REGISTER (10001011)e. ACKf. ClK3. Read PAS FI FO and fetch/decode info (this step is optional):a. Send command READ PAS address for fetch (10001010)b.ACKc. ClKd. Send command READ PAS address for decode (10010011)e. ACKf. ClKg. Send command READ FIFO REGISTER and increment counter (10010001)h. ACKi. ClKj. Send command READ FIFO REGISTER and increment counter (10010001)
k. ACKI. ClKm. Send command READ FIFO REGISTER and increment counter (10010001)n. ACKo.ClKp. Send command READ FIFO REGISTER and increment counter (10010001)q.ACKr. ClKs. Send command READ FIFO REGISTER and increment counter (10010001)t. ACKu.ClK10.11.2 Displaying A Specified Register1. Send command WRITE PDB REGISTER, GO, no EX (01001001). The OnCE controllerselects PDB as destination for serial data.2.ACK3. Send the 24-bit DSP56K opcode: "MOVE reg,x:OGDB"After 24 bits have been received, the PDB register drives the PDB. The OnCE controllerreleases the chip from the debug mode, the chip executes the MOVEinstruction, and the contents of the register specified in the instruction are loaded inthe GOB REGISTER. The signal that marks the end of the instruction returns thechip to the debug mode.4.ACK5. Send command READ GOB REGISTER (10001000)The OnCE controller selects GOB as source for serial data.6.ACK7.ClK-10.11.3 Displaying X Memory Area Starting From Address XXXXThis command uses RO to minimize serial traffic.1. Send command WRITE PDB REGISTER, GO, no EX (01001001).The OnCE controller selects PDB as destination for serial data.2. ACK3. Send the 24-bit DSP56K opcode: "MOVE RO,x:OGDB"
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- Page 234 and 235: DIGITAL SIGNAL PROCESSINGAlan V. Op
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The external command controller acts as the medium between the DSP56K target systemand a host computer. The external command controller circuit acts as a DSP56K serialdebug port driver and host computer command interpreter. The controller issues commandsbased on the host computer inputs from a user interface program which communicateswith the user.10.11 USING THE OnCEThe following notations are used:ACK = Wait for acknowledge on the DSO pinClK = Issue 24 clocks to read out data from the selected register10.11.1 Begin Debug ActivityMost <strong>of</strong> the debug activities have the following beginning:-1. ACK2. Save pipeline information:a. Send command READ PDS REGISTER (10001001)b. ACKc. ClKd. Send command READ Pil REGISTER (10001011)e. ACKf. ClK3. Read PAS FI FO and fetch/decode info (this step is optional):a. Send command READ PAS address for fetch (10001010)b.ACKc. ClKd. Send command READ PAS address for decode (10010011)e. ACKf. ClKg. Send command READ FIFO REGISTER and increment counter (10010001)h. ACKi. ClKj. Send command READ FIFO REGISTER and increment counter (10010001)
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