enable full ECUA interaction from the PC host by using source tags and switching matrix

[BenGardiner]

the previous PROCESS_SLCAN_BY_DBC was limited to only DBC stuff. Being able to get to e.g. ECUA UDS stack is an important thing for wider challenges on RAMN.

Getting this right is important of course. I have tested the attached to confirm that the firmware update scripts still work and scapy can still do UDS stuff directly to ECUA using slcan. And also doing J1939 and UDS to ECUA from the host.

The newly implemented ENABLE_ECUA_HOST_INTERACTION:

• Injects incoming host frames directly into ramn_canfd.c:568-607 tagged with RAMN_CAN_ORIGIN_HOST.
• Allows main.c:1675-1729 to dispatch host frames to all internal stacks: DBC (screen still updates), UDS
diagnostics, J1939, KWP, and XCP.
• Supports both slcan and gs_usb.
• Provides bidirectional communication by capturing internal ECU A transmissions and forwarding them to the PC
without echoing host frames back to USB.

[github-actions]

🔨 Build & Macro Coverage Report

Default Builds — Hex File Sizes

ECU	Debug (tag 15.0)	Debug (tag 2.1.1)	Release (tag 15.0)	Release (tag 2.1.1)
ECUA	546 KiB (559467 bytes)	546 KiB (559422 bytes)	369 KiB (377883 bytes)	368 KiB (377777 bytes)
ECUB	363 KiB (372451 bytes)	363 KiB (372451 bytes)	216 KiB (222166 bytes)	216 KiB (221671 bytes)
ECUC	345 KiB (353325 bytes)	345 KiB (353325 bytes)	196 KiB (201593 bytes)	196 KiB (201082 bytes)
ECUD	354 KiB (363053 bytes)	354 KiB (363053 bytes)	204 KiB (209063 bytes)	203 KiB (208748 bytes)

Macro Coverage Build Results

Variant	Macros Changed	Result	Warnings
gsusb	+ENABLE_GSUSB	✅ Pass	5
gsusb_and_bb	+ENABLE_GSUSB +ENABLE_BITBANG	✅ Pass	5
i2c	+ENABLE_I2C	✅ Pass	5
j1939	+DEFAULT_TRAFFIC_MODE=TRAFFIC_MODE_J1939	✅ Pass	5
j1939_showcase_mode	+DEFAULT_TRAFFIC_MODE=TRAFFIC_MODE_J1939 +RAMN_SHOWCASE_MODE	✅ Pass	5
kwp	+ENABLE_KWP	✅ Pass	5
no_debug	−ENABLE_USB_DEBUG −ENABLE_JOYSTICK_CONTROLS −ENABLE_SCREEN −ENABLE_CHIP8 −GENERATE_RUNTIME_STATS	✅ Pass	5
no_dynamic_bitrate	−ENABLE_DYNAMIC_BITRATE	✅ Pass	5
no_extras	−ENABLE_J1979 −ENABLE_MINICTF −ENABLE_CHIP8 −ENABLE_SCREEN −ENABLE_SPI	✅ Pass	5
no_uds	−ENABLE_UDS −ENABLE_UDS_REPROGRAMMING	✅ Pass	6
uart	+ENABLE_UART −ENABLE_CDC −ENABLE_USB	✅ Pass	5
usb_autodetect	+ENABLE_USB_AUTODETECT	✅ Pass	5
watchdog	+WATCHDOG_ENABLE	✅ Pass	5

Source Code Compile Coverage

• Total .c source lines: 21917
• Lines compiled in ≥1 configuration: 20767 (~95%)
• ENABLE_ macro coverage: 23/23 (100.0%) macros tested in both ON and OFF states

Full ENABLE_ Macro Coverage Table

#	Macro	Tested ON	Tested OFF	Covered
1	ENABLE_ADC	default (ECUB, ECUC, ECUD)	default (ECUA)	✅
2	ENABLE_BITBANG	default (ECUA), variant: gsusb_and_bb	default (ECUB, ECUC, ECUD)	✅
3	ENABLE_CDC	default (ECUA)	default (ECUB, ECUC, ECUD), variant: uart	✅
4	ENABLE_CHIP8	default (ECUA)	default (ECUB, ECUC, ECUD), variant: no_debug, variant: no_extras	✅
5	ENABLE_DYNAMIC_BITRATE	default (ECUA, ECUB, ECUC, ECUD)	variant: no_dynamic_bitrate	✅
6	ENABLE_ECUA_HOST_INTERACTION	default (ECUA)	default (ECUB, ECUC, ECUD)	✅
7	ENABLE_GSUSB	variant: gsusb, variant: gsusb_and_bb	default (ECUA, ECUB, ECUC, ECUD)	✅
8	ENABLE_I2C	variant: i2c	default (ECUA, ECUB, ECUC, ECUD)	✅
9	ENABLE_J1979	default (ECUA, ECUB, ECUC, ECUD)	variant: no_extras	✅
10	ENABLE_JOYSTICK_CONTROLS	default (ECUA)	default (ECUB, ECUC, ECUD), variant: no_debug	✅
11	ENABLE_KWP	variant: kwp	default (ECUA, ECUB, ECUC, ECUD)	✅
12	ENABLE_MINICTF	default (ECUA, ECUD)	default (ECUB, ECUC), variant: no_extras	✅
13	ENABLE_SCREEN	default (ECUA)	default (ECUB, ECUC, ECUD), variant: no_debug, variant: no_extras	✅
14	ENABLE_SPI	default (ECUA, ECUD)	default (ECUB, ECUC), variant: no_extras	✅
15	ENABLE_UART	variant: uart	default (ECUA, ECUB, ECUC, ECUD)	✅
16	ENABLE_UDS	default (ECUA, ECUB, ECUC, ECUD)	variant: no_uds	✅
17	ENABLE_UDS_REPROGRAMMING	default (ECUA, ECUB, ECUC, ECUD)	variant: no_uds	✅
18	ENABLE_USB	default (ECUA)	default (ECUB, ECUC, ECUD), variant: uart	✅
19	ENABLE_USB_AUTODETECT	variant: usb_autodetect	default (ECUA, ECUB, ECUC, ECUD)	✅
20	ENABLE_USB_DEBUG	default (ECUA)	default (ECUB, ECUC, ECUD), variant: no_debug	✅
21	ENABLE_XCP	default (ECUB, ECUC, ECUD)	default (ECUA)	✅
22	GENERATE_RUNTIME_STATS	default (ECUA, ECUB, ECUC, ECUD)	variant: no_debug	✅
23	WATCHDOG_ENABLE	variant: watchdog	default (ECUA, ECUB, ECUC, ECUD)	✅