External DPM Interrupts

netX 90 features 2 external interrupt signals for all DPM channels: Signals DIRQ and SIRQ. Since SIRQ is unused in current Hilscher LFWs, there is actually only 1 interrrupt signal related to the DPM activity

DPM_DIRQ / SPI_DIRQ signal

The DIRQ signal (depending on the used host interface parallel or serial) is triggered and reset automatically by DPM access

netX Firmware writes handshake flags: DIRQ activated
Host read handshake flags: DIRQ deactivated

The polarity of the DIRQ signal (high/low active) can be configured in the DPM hardware configuration. Details can be found inside the register description of register dpm0_com.dpm_io_cfg_misc. The signal can be enabled via the register bit dpm0_com.dpm_pio_cfg1.sel_dirq_pio.

Note 2021 Junly 1.: netXStudio supports for the serial DPM only the mode push / pull and active low. This limitation will be removed inside a future version of netXStudio.

DPM_SIRQ / SPI_SIRQ signal

currently not used by Hilscher LFWs (loadable firmwares)

Internal DPM Interrupts

The granularity of interrupts for the internal DPM is higher than for the external DPM.

Each handshake register, i.e. each DPM channel, features its own interrupt.

netx90_app.h

IRQ	Name		DPM channel mapping
..
32	hsc0_IRQn	handshake cell 0	System Channel
33	hsc1_IRQn	handshake cell 1	Sync-Hanshake Flags
34	hsc2_IRQn	handshake cell 2	Communication Channel 0
35	hsc3_IRQn	handshake cell 3	Communication Channel 1
36	hsc4_IRQn	handshake cell 4	Communication Channel 2
37	hsc5_IRQn	handshake cell 5
38	hsc6_IRQn	handshake cell 6
39	hsc7_IRQn	handshake cell 7
40	hsc8to15_IRQn	handshake cell 8..15
..

See also...