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< title > CMSIS-DAP: DAP_TransferBlock< / title >
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  < span id = "projectnumber" > Version 2.0.0< / span >
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< div id = "projectbrief" > Interface Firmware for CoreSight Debug Access Port< / div >
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< div class = "title" > DAP_TransferBlock< div class = "ingroups" > < a class = "el" href = "group__DAP__transfer__gr.html" > Transfer Commands< / a > < / div > < / div > < / div >
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< p > Read/Write a block of data from/to a single register.
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< a href = "#details" > More...< / a > < / p >
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< p > Read/Write a block of data from/to a single register. < / p >
< p > The < b > DAP_TransferBlock Command< / b > read or write a data block to the same CoreSight register. A data block are multiple 32-bit values which are read or written from/to the same CoreSight register. The CoreSight register is addressed with DPBANKSEL/APBANKSEL and address lines A2, A3 (A0 = 0 and A1 = 0). The command can execute several read/write operations to a single DP/AP register.< / p >
< p > The data transfer is aborted on a communication error:< / p >
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< ul >
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< li > Protocol Error< / li >
< li > Target FAULT response< / li >
< li > Target WAIT responses exceed configured value< / li >
< / ul >
< p > < b > DAP_TransferBlock Command< / b > : < / p >
< div class = "fragment" > < div class = "line" > | BYTE | BYTE *****| SHORT**********| BYTE *************| WORD *********|< / div >
< div class = "line" > > 0x06 | DAP Index | Transfer Count | Transfer Request | Transfer Data |< / div >
< div class = "line" > |******|***********|****************|*******************|+++++++++++++++|< / div >
< / div > <!-- fragment --> < ul >
< li > < b > DAP Index< / b > : Zero based device index of the selected JTAG device. For SWD mode the value is ignored.< / li >
< li > < b > Transfer Count< / b > : Number of transfers: 1 .. 65535.< / li >
< li > < b > Transfer Request< / b > : Contains information about requested access from host< ul >
< li > Bit 0: APnDP: 0 = DP (Debug Port), 1 = AP (Access Port)< / li >
< li > Bit 1: RnW: 0 = Write Register, 1 = Read Register< / li >
< li > Bit 2: A2 := Register Address bit 2< / li >
< li > Bit 3: A3 := Register Address bit 3< / li >
< / ul >
< / li >
< li > < b > Transfer Data< / b > : register values< ul >
< li > for Write Register transfer request: the register values written to the CoreSight register.< / li >
< li > no data is sent for Read Register operations.< / li >
< / ul >
< / li >
< / ul >
< p > < b > DAP_TransferBlock Response< / b > : < / p >
< div class = "fragment" > < div class = "line" > | BYTE | SHORT *********| BYTE *************| WORD *********|< / div >
< div class = "line" > < 0x06 | Transfer Count | Transfer Response | Transfer Data |< / div >
< div class = "line" > |******|****************|*******************|+++++++++++++++|< / div >
< / div > <!-- fragment --> < ul >
< li > < b > DAP Index< / b > : Zero based device index of the selected JTAG device. For SWD mode the value is ignored.< / li >
< li > < b > Transfer Count< / b > : Number of transfers (1 .. 65535) that are executed.< / li >
< li > < b > Transfer Response< / b > : Contains information about last response from target< ul >
< li > Bit 2..0: ACK (Acknowledge) value:< ul >
< li > 1 = OK (for SWD protocol), OK or FAULT (for JTAG protocol),< / li >
< li > 2 = WAIT< / li >
< li > 4 = FAULT< / li >
< li > 7 = NO_ACK (no response from target)< / li >
< / ul >
< / li >
< li > Bit 3: Protocol Error (SWD)< / li >
< / ul >
< / li >
< li > < b > Transfer Data< / b > : register values< ul >
< li > no data is receive for Write Register operations.< / li >
< li > for Read Register transfer request: the register values read from CoreSight register. < / li >
< / ul >
< / li >
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< li class = "footer" > Generated on Wed Aug 1 2018 17:12:11 for CMSIS-DAP by Arm Ltd. All rights reserved.
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