gca1-pi01-en
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| + | ====== GCA-PI01 | ||
| + | [[english|{{ | ||
| + | [[english|Content]] -> [[hardware-en|Hardware]] -> [[hardware-en# | ||
| + | * **[[GCA1-PI01-en|GCA-PI01]]** | [[rocnet: | ||
| + | * [[mgv-overview-en|The GCA modules]] | ||
| + | * [[: | ||
| + | |||
| + | |||
| + | \\ | ||
| + | ^^^^By Peter Giling ^^^^ | ||
| + | |||
| + | [[http:// | ||
| + | \\ | ||
| + | |||
| + | ===== The final design ===== | ||
| + | | {{: | ||
| + | | A nice and easy to assemble board is available now.\\ No Surface Mount Devices (SMD) are used. | The Pi01 mounted on the Raspberry Pi B | The Pi01 mounted on the Raspberry Pi B+ | | ||
| + | \\ | ||
| + | |||
| + | ===== Description ===== | ||
| + | All GCA interface modules like GCA76, GCA77, GCA93, GCA136 and many others are also adaptable to Raspberry PI.\\ | ||
| + | For that purpose the I2C connection of Raspberry Pi is more than sufficient to get up to 128 I-O lines.\\ | ||
| + | This small board will provide a connection between Raspberry Pi and the GCA-PI02 boards.\\ | ||
| + | Connection between these boards are either RJ12 cable or RJ45 Ethernet, just by selection of the right connector.\\ | ||
| + | All other connectors on Raspberry Pi remain accessible.\\ | ||
| + | Addional, there is a 4 pin connector on board, for future expansion with serial connections.\\ | ||
| + | \\ | ||
| + | |||
| + | =====Supported Raspberry Pis===== | ||
| + | * Model 1, 2 and 3 | ||
| + | * Zero | ||
| + | //Raspberry Pi 4 is currently not supported.// | ||
| + | |||
| + | \\ | ||
| + | ===== I2C system ===== | ||
| + | |||
| + | I2C is basicly made for communication between chips, together on one board.\\ | ||
| + | Therefore, according to specifications , the total length of all SDA and SCL wires together should not exceed 1 meter (3' 4'' | ||
| + | That 1 meter limit is ver strict, meaning that a few centimeters (or even less inches) longer can be a problem.\\ | ||
| + | Important is to know that this 1 meter means ALL the RocNet cables in this Local RocNet network TOGETHER, conterolled by a Raspberry pi.\\ | ||
| + | This system will be made with addional line drivers, making a total length of a few meters more possible.\\ | ||
| + | Each board is provided with an extra line driver P82B715 and a low drop voltage regulator to have 3.3 V available.\\ | ||
| + | The regulator skips the need of transporting 3.3 V from the Raspi, which could give more problems than profit.\\ | ||
| + | But it is also important to realise that the supply over the RocNet cable is only 5 Volt.\\ | ||
| + | And the length of the cabler might be fine for the I2C network uitself, but certainly NOT for the supply in that cable.\\ | ||
| + | And with a little bit of cable length, that 5 Volt will very fast drop down, making the system unstable.\\ | ||
| + | Either RJ12 flatcable or RJ45 Ethernet cable is NOT made for current supply.\\ | ||
| + | So the conclusion here is, use only very short cables, with no more than a total lenght (all cables together!) of 2 -3 meters with one Raspberyy PI.\\ | ||
| + | The extra avaiable GCA_PI06 will provide enough power, but always measure that voltage on the far ends of this RocNet network.\\ | ||
| + | As soon as your voltage there (with the system working) drops down to below 4,8 Volt, you are already too far down.\\ | ||
| + | If you need more I/O you will need multiple Rspberry Pi compters with their own supply.\\ | ||
| + | Raspberry Pi computers are linked to the Ethernet network, and in that ethernet network there are onloy signals, no current.\\ | ||
| + | |||
| + | RocNet is not a ' | ||
| + | |||
| + | |||
| + | |||
| + | \\ | ||
| + | For more information about cable length with the line driver, please see http:// | ||
| + | |||
| + | |||
| + | |||
| + | |||
| + | ===== Hardware ===== | ||
| + | |||
| + | |||
| + | ====Boards/ | ||
| + | * [[: | ||
| + | ====Files==== | ||
| + | | {{: | ||
| + | | {{: | ||
| + | | {{: | ||
| + | ^ N.B. Only complete ordered kits will be supported! ^ | ||
| + | \\ | ||
| + | \\ | ||
| + | |||
| + | ===== Led functions ===== | ||
| + | ^ Led1 (green led) ^ ^ | ||
| + | | OFF | Program in Raspi not running | ||
| + | | slow flash | Normal function | ||
| + | | Fast flash | Button is pushed longer that 5 seconds, | ||
| + | \\ | ||
| + | |||
| + | ^ Led2 (red led) ^ | ||
| + | | will flash when show button is pressed in Rocnet screen | ||
| + | ===== Pushbutton ===== | ||
| + | Holding down PB1 for longer than 5 seconds will abort the RocNet program in the Raspberry Pi.\\ | ||
| + | This button must be activated first on the __**[[: | ||
| + | \\ | ||
| + | ===== Jumper 1 ===== | ||
| + | Only place jumper 1, J1, in case the 5V power supply for the Raspberry Pi comes over the RJ12 connector. (Pi06)\\ | ||
| + | Make sure there is no external power supply connected to the Raspberry Pi.\\ | ||
| + | \\ | ||
| + | ===== Pin assignment for RJ12/RJ45 connector ===== | ||
| + | \\ | ||
| + | ^ RJ12 ^ | ||
| + | | Pin# | Pin# | Function | | ||
| + | | - | | | | ||
| + | | - | 1 | GND | | ||
| + | | 1 | 2 | +5V | | ||
| + | | 2 | 3 | SCL | | ||
| + | | 3 | 4 | GND | | ||
| + | | 4 | 5 | SDA | | ||
| + | | 5 | 6 | GND | | ||
| + | | 6 | 7 | +5C | | ||
| + | | - | 8 | GND | | ||
| + | \\ | ||
| + | \\ | ||
| + | |||
| + | ===== RS232 on S1===== | ||
| + | By using the Rocnetnode installer the **/ | ||
| + | * See: **[[http:// | ||
| + | |||
| + | ^ S1 Pin Layout ^^ | ||
| + | | 1 | +5V | | ||
| + | | 2 | GND | | ||
| + | | 3 | Tx | | ||
| + | | 4 | Rx | | ||
| + | |||
| + | ====Raspberry Pi 3==== | ||
| + | To enable the /dev/ttyAM0 device for serial communication the following steps are needed: | ||
| + | ===Disable Serial TTY=== | ||
| + | Standard the /dev/ttyAM0 is used for TTY communication; | ||
| + | < | ||
| + | crw--w---- 1 root tty 204, 64 Feb 9 08:18 / | ||
| + | </ | ||
| + | But this mode is not usable for normal serial communication, | ||
| + | < | ||
| + | crw-rw---- 1 root dialout 204, 64 Feb 10 10:47 / | ||
| + | </ | ||
| + | Disable the serial TTY on the interfaces tab:\\ | ||
| + | {{: | ||
| + | Enable UART and disable Bluetooth in the / | ||
| + | < | ||
| + | enable_uart=1 | ||
| + | dtoverlay=pi3-disable-bt | ||
| + | dtoverlay=pi3-miniuart-bt | ||
| + | </ | ||
| + | In case the / | ||
| + | < | ||
| + | dwc_otg.lpm_enable=0 console=serial0, | ||
| + | </ | ||
| + | > Both files can only be edited by the super user: sudo vi / | ||
| + | |||
| + | ====RFID==== | ||
| + | An RFID reader can be connected to the serial port with the following hardware: | ||
| + | * __**[[: | ||
| + | * __**[[: gca41-en|GCA41 Arduino nano shield RFID-interface for RC522]]**__ | ||
| + | |||
| + | < | ||
| + | {{: | ||
| + | ^ Parts ^^ | ||
| + | | R1 | 1K | | ||
| + | | R2 | 2K2 | | ||
| + | | C4 | ELCO 10 uF 25V | | ||
| + | \\ | ||
| + | ^ RFID1 ^ ID-12LA ^ | ||
| + | | 1 | 1 | | ||
| + | | 2 | 2, 11 | | ||
| + | | 3 | 9 | | ||
| + | --></ | ||
| + | |||
| + | \\ | ||
| + | |||
| + | ===== GPIO Pin Layout ===== | ||
| + | The GCA-Pi01 must be connected to pin 1-26.\\ | ||
| + | | :!: __If the GCA-Pi01 is misplaced it could damage the Raspberry Pi.__ (Both models.)| \\ | ||
| + | \\ | ||
| + | |||
| + | ^ Model B ^ Model B+ ^ | ||
| + | | {{http:// | ||
| + | | http:// | ||
| + | |||
| + | \\ | ||
| + | ==== Pin 1 ==== | ||
| + | The white square on the Pi01 board marks Pin 1: | ||
| + | ^ GCA-Pi01 ^ Raspberry Pi B+ ^ | ||
| + | | {{: | ||
| + | **Make sure that the Pi01 Pin 1 is on the Raspberry Pi GPIO Pin 1 before power on.**\\ | ||
| + | (Just double check.)\\ | ||