Tool/software: Code Composer Studio
Hi
While reading reference manual for Tms570ls0432 I found the we can wakeup the cpu from Low power mode using using
GIO interrupt,
CAN message,
SCI message
here i want to wakeup my controller from CAN message send by other controller .
But inside the DCAN module reference manual there is nothing explained about it .
How to wakeup controller from CAN message and what type of CAN message is required to wakeup ?
Thanks .
Hello Indrajit,
I think the process is identified in the following two sections of the TRM.
In this section it is stating that you need to enable interrups for the DCAN ES register so you get the interrupt for the status update. In addition, you then need to clear the CAN_INIT bit. When the DCAN module is in this state you then need to put the module into power down mode using the PSPWRDWNCLR register bit associated with the DCAN module responsible for wakeup which enables the bus activity detection circuit. Once powered down via the PCR, the detectino circiut will remain powered and detect activity on the CAN bus for the wakeup sequence to begin. As noted, the first message during the wakeup sequence will be lost.
The VIM funnels all of the wake up interrupts into a single wake_int to the GCM. In order to be certain that only the source that you want will wake up the device, you can enable or disable the wakeup from each potential interrupt source using the WAKEENASET and WAKEENACLR registers.
