以下部分详细介绍了 AM437x SDK 的暂停/恢复示例。以下为通用过程：

1. 加载 wlcore 模块。
2. 启动站点模式。
3. 连接到 AP。
4. 进入暂停模式。
5. 一段时间后，从暂停模式恢复。

利用以下命令，首先加载 wlcore 模块，启动站点并连接到 AP：

cd /usr/share/wl18xx
./load_wlcore.sh
./sta_start.sh
./sta_connect-ex.sh OpenSSID

使用以下命令验证 EVM 是否已连接，输出将为 AP 设置和 RSSI：

iw wlan0 link

调用以下命令可进入“暂停”模式：

echo mem > /sys/power/state

预期结果如下所示，EVM 屏幕会关闭：

[  344.900146] PM: Syncing filesystems ... done.
[  347.304138] Freezing user space processes ...(elapsed 0.01 seconds) done.
[  347.324859] Freezing remaining freezable tasks ...(elapsed 0.01 seconds) done.
[  347.344879] Suspending console(s) (use no_console_suspend to debug)
[  347.359039] wl12xx: down
[  347.492248] PM: suspend of devices complete after 139.892 msecs
[  347.494049] PM: late suspend of devices complete after 1.708 msecs
[  354.081787] GFX domain entered low power state
[  354.081848] Successfully transitioned all domains to low power state
[ 1599.585723] PM: Syncing filesystems ... done.
[ 1602.515808] Freezing user space processes ...(elapsed 0.01 seconds) done.
[ 1602.539642] Freezing remaining freezable tasks ...(elapsed 0.01 seconds) done.
[ 1602.559600] Suspending console(s) (use no_console_suspend to debug)
[ 1602.567535] wl12xx: down
[ 1602.706909] PM: suspend of devices complete after 139.770 msecs
[ 1602.708557] PM: late suspend of devices complete after 1.556 msecs
[ 1634.825073] GFX domain entered low power state

点击终端控制台后（为了从暂停模式恢复）将出现以下日志，EVM 屏幕将再次激活：

[  354.290771] PM: early resume of devices complete after 208.465 msecs
[  354.606018] net eth0: CPSW phy found : id is : 0x4dd074
[  354.610931] wl12xx: state: 0
[  355.069427] wl12xx: PHY firmware version: Rev 8.2.0.0.245
[  355.069488] wl12xx: firmware booted (Rev 8.9.0.0.86)
[  355.130493] wl12xx: Association completed.
[  355.153411] PM: resume of devices complete after 861.928 msecs
[  355.216430] Restarting tasks ... done.

在暂停之后或空闲一段时间后，根据电源域转换状态来检查实际上是否正在转换到关闭模式：

root@am335x-evm:~# cat /tmp/pm_debug/count
[  611.886413] pwrdm state mismatch(cefuse_pwrdm) 3 != 0
cefuse_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0
mpu_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0,RET-MEMBANK3-OFF:0
per_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:7,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0,RET-MEMBANK3-OFF:0
rtc_pwrdm (OFF),OFF:1,RET:0,INA:0,ON:0,RET-LOGIC-OFF:0
gfx_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0
l4_cefuse_clkdm->cefuse_pwrdm (0)
gfx_l4ls_gfx_clkdm->gfx_pwrdm (0)
gfx_l3_clkdm->gfx_pwrdm (1)
l4_rtc_clkdm->rtc_pwrdm (1)
mpu_clkdm->mpu_pwrdm (1)
l4_wkup_aon_clkdm->wkup_pwrdm (3)
l3_aon_clkdm->wkup_pwrdm (1)
l4_wkup_clkdm->wkup_pwrdm (5)
clk_24mhz_clkdm->per_pwrdm (1)
lcdc_clkdm->per_pwrdm (1)
cpsw_125mhz_clkdm->per_pwrdm (2)
pruss_ocp_clkdm->per_pwrdm (0)
ocpwp_l3_clkdm->per_pwrdm (0)
l4hs_clkdm->per_pwrdm (1)
l3_clkdm->per_pwrdm (10)
l4fw_clkdm->per_pwrdm (2)
l3s_clkdm->per_pwrdm (4)
l4ls_clkdm->per_pwrdm (19)

每个暂停恢复周期计数器会增加：per_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:7,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0,RET-MEMBANK3-OFF:0。