Project SPECTRE

Project SPECTRE (Speeduino PrintEd Circuit board TjeeRdiE). This is a PCB with the hardware to run speeduino on a STM32F407VE6T board from ebay. (Or a STM32 BLACK_F407VE as it is sometimes called).

Schematics and more information on the cpu board can be found here: (https://github.com/mcauser/BLACK_F407VE)

The case with connectors can be found here: https://nl.aliexpress.com/item/32839361268.html?spm=a2g0z.12010615.8148356.7.1da330edPBhz16

Latest version is 0.5.2

A stand alone Peak and Hold injector driver board is now in a seperate repository. See: https://github.com/Tjeerdie/Peak-And-hold-Driver

Getting Started

Take a look at the very informative manual for speeduino: https://speeduino.com/Speeduino_manual.pdf

There is a difference for the TPS with respect to the manual. The TPS must be fed by 3.3V and not 5V like the other speeduino boards. For best performance it is better to wire all the grounds of the sensors to the GND pins and not use the PWR_GND or carchassis for this.

How to load the firmware to the STM32 see: https://speeduino.com/forum/viewtopic.php?f=13&t=1914&p=26572#p26572

Board pinout

The TS Mapping column is the pin you enter in the "Local Auxillary Input Channel Configuration" when repurposing the input pins for another purpose (example: oil pressure sensor): https://speeduino.com/forum/viewtopic.php?f=14&t=2809

Pin#	Function	Alternative	Switch	Tuner Studio Mapping
1	GND_PWR
2	GND_PWR
3	12V_ECU
4	12V_ECU
5	INJ_CH8			66
6	INJ_CH7			67
7	INJ_CH5			62
8	INJ_CH6			64
9	IDLE1-OUT	STEP_1A_OUT	JP5
10	BARO			A9
11	Spare_2_out	Step_2B_OUT	JP6	71
12	Spare_1_Out	Step_1B_OUT	JP7	72
13	IGN_CH1
14	02_2			A4
15	FAN
16	IDLE2-OUT	STEP_2A_OUT	JP8
17	IAT
18	IAT_2			A0
19	FUEL_PUMP
20	CLT_2			A1
21	RS232_TX
22	GND	IGN5-OUT	JP18
23	O2
24	INJ_CH4
25	MAP
26	GND	IGN6-OUT	JP16
27	CLT
28	INJ_CH3
29	CANH
30	GND
31	IGN_CH2
32	INJ_CH1
33	GND
34	RS232_RX
35	TPS
36	IGN_CH3			24
37	5V
38	FLEX_IN
39	VR2-
40	IGN_CH4			34
41	VR2+
42	VR1-
43	VR1+
44	INJ_CH2
45	CANL
46	3.3V
47	BOOST-OUT
48	TACHO-OUT

Jumper settings

There are 12 jumpers on the board to set/change various hardware configurations to suit your needs. with a sharp object scratch away the default bridge and use a solder bridge between the alternative configuration pins. The pull up resitors (JP1/JP4) are briged vs non bridged and no need to skratch anything away.

JP#	Function	Default	Alternative
1	Halleffect Pullup resistor	Not Conneced	Connected
2	Halleffect or VR input VR1	VR	Hall
3	Halleffect or VR input VR2	Hall	VR
4	Halleffect Pullup resistor	Not Conneced	Connected
5	STEP_1A_out or IDLE1-OUT	IDLE1-OUT	STEP_1A_OUT
6	Spare_2_out or Step_2B_OUT	Spare_2_out	Step_2B_OUT
7	Spare_1_Out or Step_1B_OUT	Spare_1_Out	Step_1B_OUT
8	IDLE2-OUT or STEP_2A_OUT	IDLE2-OUT	STEP_2A_OUT
10	Tacho out voltage	5V output	12V output
15	Flex fuel or Boot0 in	Flexfuel	Boot0
16	Ignition 6 or GND	GND	IGN6
18	Ignition 6 or GND _	GND	IGN7

Information for assembling a V0.5.X board

Information for board assembly and choosing components.

RS232 and bluetooth

The hardware serial port 1 is shared between bluetooth and RS232 output on the ECU connector. So that means you can only build it with the bluetooth module in place OR the max232 ic in place not both! That will break the communication.

Dont forget to configure the bluetooth module to use 115200 bps baudrate using the HC-05/HC-06 AT commands.

If you want your main/Tuner studio communiation to use the hardware serial port 1 (So bluetooth or RS232 on the ECU connector). Build the speeduino firmware in the arduino IDE with no "usb support" -> "None". In that case it will default to use hardware serial 1 as the communication.

If the bluetooth comms are not working and you are using a HC-05 or HC-06 module (both are 3.3v so its safe to direcly connect to the MCU). For V0.5.2 of SPECTRE [R37,R38] can be replaced by 0 ohms. For V0.5.3 [R38] can be replaced by 0 ohm.

Zener diodes

If you build the board with the injector driver mosfets to be BSP78 [Q10,Q11,Q13,Q14,Q18,Q19,Q20,Q21] you can leave the bzx84C39 + 1N4148 out [33,D34,D35,D36,D37,D38,D39,D40,D41,D42,D43,D44,D45,D46,D47,D48]. These are used for clamping, but the BSP78 has internal clamping. You can use other mosfets with SOT223 footprint in place of the BSP78. If these are not clamped or reptetative avalanch rated use the clamping diodes to keep them in spec.

Vehicle Speed input

Note: This workaroud is no longer working. There is no solution yet.

Here is a scription how to use one of the analog spare inputs (IAT_2 = ECU pin 18) as VSS input for speeduino. This can be a hall type sensor or a porximity sesnsor. it can NOT be a VR type sensor

1. Remove C2 and C4 from the board
2. On the MCU pin headers of the board connect PA0 to PA2 with a bit of solder
3. in Tuner Studio select pin 50 (PA2) for the VSS input pin.

PA0 (pin 48 in TS) can not work as VSS pin because of conflicting interrupts with the crank sensor (PE0)

Tested on V0.5.2/V0.5.3

The following functions have been tested and confirmed to be working on a volvo B230FK redblock engine. This a 4 cylinder engine with small turbo. A VAG wasted spark coil with internal drivers is used as ignition

VR2 input (Trigger 2) [OK]
Halleffect trigger input (Trigger 1) [OK]
VR1 input (Trigger 1) [OK]
Halleffect trigger input (Trigger 2) [OK]
Manifold Absolute pressure (MAP) [OK]
Injector outputs [OK]
Lambda sensor (O2) [OK]
Throttle position input [OK]
Bluetooth module (PA9,PA10) [OK]
Battery voltage reading [OK]
Ignition outputs [OK]
Fuel pump relay [OK]
FAN relay [OK]
PWM idle output [OK]
Coolant temperature (CLT) [OK]
Inlet Air Temperature (IAT) [OK]
RS232 TX [OK]
RS232 RX [OK]
BOOST output [OK]
Stepper idle output [OK]
TACHO out [OK]

To be tested on V0.5.2/V0.5.3

BARO
CAN bus TX
CAN bus RX
FLEX fuel input
Coolant temperature (CLT_2)
Inlet Air Temperature (IAT_2)
Lambda sensor (O2_2)

License

This project is licensed under the GNU GENERAL PUBLIC LICENSE - see the LICENSE.md file for details