Wake up cause

Here is a list of possible wake-up signals used both to enable the wake up mode and to read which of the modes that woke up the system.

Read

MX4_SPI_DIR=/opt/hm/pic_attributes
cat $MX4_SPI_DIR/ctrl_wakeup_cause
#or
/opt/hm/wake_up_cause.sh

Enable coprocessor wake up source

MX4_SPI_DIR=/opt/hm/pic_attributes
echo 0xXX >  $MX4_SPI_DIR/ctrl_wakeup_sources_register

List

Bit	Wake Up Signal	Explanation
0x00	WAKE_UP_SRC_NONE
0x01	WAKE_UP_SRC_WDT	Watchdog
0x02	WAKE_UP_SRC_SPI INT	SPI communication from Linux system
0x03	WAKE_UP_SRC_MAIN VOLTAGE
0x04	WAKE_UP_SRC_BATTERY VOLTAGE
0x05	WAKE_UP_SRC_ANALOG 1	Analog In number 1
0x06	WAKE_UP_SRC_ANALOG 2	Analog In number 2
0x07	WAKE_UP_SRC_ANALOG 3	Analog In number 3
0x08	WAKE_UP_SRC_ANALOG 4	Analog In number 4
0x09	WAKE_UP_SRC_START SIGNAL
0x0A	WAKE_UP_SRC_CAN	Any CAN (if T30Fr check which with can-xcvr -s)
0x0B	WAKE_UP_SRC_DIN 1 F	Digital In number 1 (Falling Edge)
0x0C	WAKE_UP_SRC_DIN 1 R	Digital In number 1 (Rising Edge)
0x0D	WAKE_UP_SRC_DIN 2 F	Digital In number 2 (Falling Edge)
0x0E	WAKE_UP_SRC_DIN 2 R	Digital In number 2 (Rising Edge)
0x0F	WAKE_UP_SRC_DIN 3 F	Digital In number 3 (Falling Edge)
0x10	WAKE_UP_SRC_DIN 3 R	Digital In number 3 (Rising Edge)
0x11	WAKE_UP_SRC_DIN 4 F	Digital In number 4 (Falling Edge)
0x12	WAKE_UP_SRC_DIN 4 R	Digital In number 4 (Rising Edge)
0x13	WAKE_UP_SRC_DIN 5 F	Digital In number 5 (Falling Edge)
0x14	WAKE_UP_SRC_DIN 5 R	Digital In number 5 (Rising Edge)
0x15	WAKE_UP_SRC_DIN 6 F	Digital In number 6 (Falling Edge)
0x16	WAKE_UP_SRC_DIN 6 R	Digital In number 6 (Rising Edge)
0x17	WAKE_UP_SRC_MODEM RING	Not supported
0x18	WAKE_UP_SRC_START SWITCH F
0x19	WAKE_UP_SRC_START SWITCH R
0x20	WAKE_UP_SRC_MIN 1 F
0x21	WAKE_UP_SRC_MIN 1 R
0x22	WAKE_UP_SRC_MIN 2 F
0x23	WAKE_UP_SRC_MIN 2 R
0x24	WAKE_UP_SRC_DIN 7 F	Digital In number 7 (Falling Edge)
0x25	WAKE_UP_SRC_DIN 7 R	Digital In number 7 (Rising Edge)
0x26	WAKE_UP_SRC_DIN 8 F	Digital In number 8 (Falling Edge)
0x27	WAKE_UP_SRC_DIN 8 R	Digital In number 8 (Rising Edge)