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关于使用whisper指令仿真器时读不进开关的值的问题

一,关于使用whisper指令仿真器时开关的值(GPIO_SWs)读不进 switches_value变量的问题

1,Source code:

#define GPIO_SWs 0x80001400
#define GPIO_LEDs 0x80001404
#define GPIO_INOUT 0x80001408

#define READ_GPIO(dir) (*(volatile unsigned )dir)
#define WRITE_GPIO(dir, value) { (
(volatile unsigned *)dir) = (value); }

int main ( void )
{
int En_Value=0xFFFF, switches_value;

WRITE_GPIO(GPIO_INOUT, En_Value);

while (1) { 
    switches_value = READ_GPIO(GPIO_SWs);
    switches_value = switches_value >> 16;
    WRITE_GPIO(GPIO_LEDs, switches_value);
}

return(0);

}

2,platformio.ini设置

; PlatformIO Project Configuration File
;
; Build options: build flags, source filter, extra scripting
; Upload options: custom port, speed and extra flags
; Library options: dependencies, extra library storages
;
; Please visit documentation for the other options and examples
; http://docs.platformio.org/page/projectconf.html

[env:swervolf_nexys]
platform = chipsalliance
board = swervolf_nexys
framework = wd-riscv-sdk

monitor_speed = 115200

debug_tool = whisper
debug_build_flags = -O0 -ggdb3 -g3

board_build.bitstream_file = /home/minyang/RVfpga/src/rvfpga.bit

board_debug.verilator.binary = /home/minyang/RVfpga/verilatorSIM/Vrvfpgasim

3,遇到的问题
当我按照教程手册,先把板子连接到pc上,然后把bits流下载到pc上,接着点击pio debug按钮。在点击单步跳过调试按钮中,switches_val的值一直显示为0,这与我在板子上设置了开关的值不符合(如图一)。我猜想原因是不是whisper是虚拟调试器,与连上板子无关?那么在点击pio debug按钮时c程序是否下载到板子中?如果想让switches_value与我在板子上设置的一致该怎么做呢?
图片
图一