SylixOS BSP开发(十五)

验证中断系统

上一章节我们已经完成了BSP中的中断系统接口实现，现在该验证下中断控制器是否能正常工作了。我们可以在系统TICK的中断处理函数中添加一个打印信息：

如果中断系统正常工作的话，当TICK产生中断时就会调用这个服务服务函数。同时我们将原来bspTickInit 接口最后添加的验证定时器是否产生中断的代码删除，再将定时器中断频率设置为1，因为启动参数中我们设置的是1000，如果中断正常工作，1s会打印1000条信息，这样影响我们判断，所以设置成1s产生1次中断：

重新编译内核镜像进行引导，如果看到串口上每秒都有1个aaa 打印就说明中断系统是正常工作的：

=> fatload mmc 0:1 40000000 bsp_allwinner_r16.bin
reading bsp_allwinner_r16.bin
3233520 bytes read in 214 ms (14.4 MiB/s)
=> go 40000000
## Starting application at 0x40000000 ...
environment variables load from /etc/profile fail, error: No such file or directory
sysname  : sylixos
nodename : sylixos
release  : Tangram
version  : 1.12.9
machine  : Allwinner R16, Quad-core Cortex-A7 Up to 1.2GHz


                          [[                          (R)
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[[  [[            [[                    [[  [[  [[  [[
[[      [[  [[    [[    [[[[    [[  [[  [[  [[  [[
 [[     [[  [[    [[      [[    [[  [[  [[  [[   [[
  [[    [[  [[    [[      [[     [[[[   [[  [[    [[
   [[   [[  [[    [[      [[      [[    [[  [[     [[
    [[  [[  [[    [[      [[     [[[[   [[  [[      [[
[[  [[  [[  [[    [[      [[    [[  [[  [[  [[  [[  [[
 [[[[    [[[[   [[[[[[  [[[[[[  [[  [[   [[[[    [[[[
           [[
          [[    KERNEL: LongWing(C) 1.12.9
       [[[[   COPYRIGHT ACOINFO Co. Ltd. 2006 - 2019

SylixOS license: Commercial & GPL.
SylixOS kernel version: 1.12.9 Code name: Tangram

CPU     : Allwinner R16, Quad-core Cortex-A7 Up to 1.2GHz
CACHE   : 128KBytes(D-32K/I-32K) L1-Cache per core,512KBytes L2-Cache
PACKET  : ClockworkPI (CPI v3.1) development board
ROM SIZE: 0x00400000 Bytes (0x00000000 - 0x003fffff)
RAM SIZE: 0x40000000 Bytes (0x40000000 - 0x7fffffff)
BSP     : BSP version 1.0.0 for Tangram
[root@sylixos:/root]# aaa
aaa
aaa
aaa
aaa
aaa
aaa
aaa

验证正常后再将定时器中断频率改为系统TICK数量并删除TICK中断服务函数中的打印：

timerStart(0, LW_TICK_HZ);