第一次下载uboot,使用JTAG链接CPU,reset后提示Unable to halt CPU core。在网上查资料说是FLASH未复位,导致CPU忙,无法被挂起。但是我使用的SPI flash根本没有reset管脚。认真检查了电路,并对照硬件开发手册分析,是否是如下原因: 目前电路图的链接将POR_SEL串联下拉电阻至GND,即选择CPU内部复位模式,对外部复位不响应。
Either the memory wait signal of the core is still enabled or CPU disables the clock (wrong PLL clock settings/CPU enters power-save mode).Therefore the core cannot communicate via JTAG.The only way to gain control of the core via JTAG is to reset it and halt it immediately.B...
1、CPU的芯片手册上有关于SDRAM的引脚配置，根据你板子上的型号和大小选择正确的地址线；2、对于nand也是，cpu的OM引脚是负责选择nand启动的，还有一些是配置nand的。我个人觉得很有可能是因为nand的问题挂死了cpu，楼主再试试。
尝试给板子重新上电,将J-link重上电 用烧热的烙铁将CPU的管脚挨个点一遍 我碰到这个问题时,都是这么解决的.另外,如果程序比较大,再用j-link仿真时,也会出现这个错误提示,尚未找到解决方法.
1.检查复位电路工作是否正常，上电时用示波器检查复位信号是否正常（低到高，大概几百毫秒）2.2440工作电压是否正常（3.3v和1.25v）3.检查OM0：OM1是不是悬空了，应该连接到固定电平的（NAND或者NOR启动）
Reset type BP0: Using RESET pin, halting CPU with breakpoint @ 0 Core does not stop after Reset, setting WP to stop it. Failed to halt CPU core after Reset (BP@0), using default reset str...
Either the memory wait signal of the core is still enabled or CPU disables the clock (wrong PLL clock settings/CPU enters power-save mode).Therefore the core cannot communicate via JTAG.The only way to gain control of the core via JTAG is to reset it and halt it immediately.BTW: Which ...
2、复位、重新上电后，再通过JTAG去调试，显示"Unable to halt ARM core"， 使用J-LINK->h, J-...
Hi, I have a SAMD51 custom board and the Atmel SAME54 XPLAINED board which is Rev 0 (Engineering Sample). Similar issue to this abandoned thread: [ABANDONED] J-Link ATSAME54 can't halt CPU However I can confirm it is not just Atmel Studio but JLink…
"Info: Using DBGRQ to halt CPU" "Resetting TRST in order to halt CPU" "Info: CP15.0.0, 0x41129200, ARM, architecture 4T" "Error: unable to halt ARM core" "Trying to connect with 5kHz!" It's also not possible to debug a blinky in IAR IDE. HW-Info Mike...