如果想要写入/读出芯片内部Flash/Sram/Register的数值,需要用到两个AP寄存器:TAR(Transfer Address Register)和DRW(Data Read/Write Register)。 上面截图中说的很清楚,TAR寄存器中的地址,不是AP内部的地址,而是与AP连接的芯片系统中的物理地址。 DRW寄存器将AP访问直接映射到一个或多个芯片系统内部的memory访问。在me...
if(SWJ_WriteAP(AP_CSW, CSW_VALUE | CSW_SIZE32))return 1;err = SWJ_WriteData(addr, val);...
Success_write_operation 主机在接收到OK的ACK响应后,经过一个周转期后必须立即开始数据的传输,在数据传输完毕之后没有任何的周转期,以便于主机立即驱动线路以进行下一轮操作. 对于写入操作,写入DP寄存器和AP寄存器的操作是相同的.当数据传输阶段完毕后,对于DP值的写入立即作用到DP寄存器上,而对于AP值的写入可以先作用...
如果想要写入/读出芯片内部Flash/Sram/Register的数值,需要用到两个AP寄存器:TAR(Transfer Address Register)和DRW(Data Read/Write Register)。 上面截图中说的很清楚,TAR寄存器中的地址,不是AP内部的地址,而是与AP连接的芯片系统中的物理地址。 DRW寄存器将AP访问直接映射到一个或多个芯片系统内部的memory访问。在me...
RnW A single bit, indicating whether the access is a read or a write. This bit is 0b0 for a write access, or 0b1 for a read access. A[2:3] Two bits, giving the A[3:2] address field for the DP or AP register Address: ...
DCRSRregister = Debug Core Register Selector Register,provides debug access to the ARM core registers, special-purpose registers, and Floating-point extension registers. A write to DCRSR specifies the resister to transfer. 2.3.3DCRDR Debug Core Register Data Register, DCRDR寄存器提供对ARM核心寄存器...
- Rnw 选择是读还是写。0:Write 1:Read -A[2:3] DP或者AP寄存器的地址,注意它是低位在前。 -Praity 奇偶校验位,它是APnDP、RnW和A[2:3]共4个bit的校验位 -Stop 停止位。始终为0。 -Park 该位确切来说应该始终为1 acknowledge phase: -OK : means successful —— 3‘b001 ...
APnDP -- A single bit, indicating whether the Debug Port or the Access Port Access Register is to be accessed. 1 for accessing AP. RnW -- A single bit, this bit is 0 for an write access, or 1 for a read access. A[2:3] -- Two bits, giving the A[3:2] address field for ...
U8 swd_writeReg(U8 command, const U8 *data); U8 swd_readAPReg(const U8 *address, U8 *buff); U8 swd_writeAPReg(const U8 *address, const U8 *buff); U8 swd_clearStickyError(void); U8 swd_abortAP(void); #endif /* SWD_H_ */ 复制代码 /*! \file \brief ARM-SWD routi...
if(SWJ_WriteDP(DP_SELECT, apsel | bank_sel)) { return 1; } tmp_in = SWD_REG_AP | SWD_REG_R | SWD_REG_ADR(adr); /* first dummy read */ ack = SWD_Transfer(tmp_in, val); ack = SWD_Transfer(tmp_in, val); (ack == DAP_TRANSFER_OK) ? (err = 0) : (err = 1); ...