Hardware/PICEBS3/Welcome
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− | == Welcome to the | + | == Welcome to the PICEBS3 wiki == |
<div id="presentation"></div> | <div id="presentation"></div> | ||
− | + | PICEBS3 is the name of a small embedded computer board targeted at teaching embedded systems programming based on the Mikroe EasyPicPro v8 board. | |
− | As its name suggests, it is the | + | As its name suggests, it is the third iteration of a successful family of Microchip PIC board. |
+ | |||
+ | The Mikroe board has been just modified for our laboratories usage. | ||
Please note that, as a student, you can '''loan a board for free''' during your studies to work at home ;-) Just ask the laboratory responsible [[User:sap|Pascal Sartoretti]] (sap) for the procedure to follow. | Please note that, as a student, you can '''loan a board for free''' during your studies to work at home ;-) Just ask the laboratory responsible [[User:sap|Pascal Sartoretti]] (sap) for the procedure to follow. | ||
− | [[File: | + | [[File:PICEBS3.jpg|400px|center]] |
− | We, [[Hardware/PICEBS/2/Team |the | + | We, [[Hardware/PICEBS/2/Team |the PICEBS3 team]], provide a comprehensive solution for |
* Practical work for [http://hevs.ch HEI] course [http://sin.begincoding.net ''Information systems''] given in second year. | * Practical work for [http://hevs.ch HEI] course [http://sin.begincoding.net ''Information systems''] given in second year. | ||
* All kind of project featuring a small-sized micro-controller. | * All kind of project featuring a small-sized micro-controller. | ||
− | === What can be done with the | + | === What can be done with the PICEBS3? === |
The board is powerful enough to run applications with: | The board is powerful enough to run applications with: | ||
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* ... | * ... | ||
− | To program this board, you do not require an external programming probe, as it already includes a | + | To program this board, you do not require an external programming probe, as it already includes a "Microchip Snap"system for programming and debugging. All you need is an USB port and the [http://www.microchip.com/pagehandler/en-us/family/mplabx/ free MPLAB-X] IDE. Caution, the USB câble has to be an USB-A cable. |
=== Hardware === | === Hardware === | ||
− | ([[ | + | ([[http://wiki.hevs.ch/uit/index.php5/Hardware/PIcEBS|hardware details]]). |
Here is a list of the main PICEBS2's characteristics: | Here is a list of the main PICEBS2's characteristics: |
Revision as of 14:37, 11 March 2021
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Welcome to the PICEBS3 wiki
PICEBS3 is the name of a small embedded computer board targeted at teaching embedded systems programming based on the Mikroe EasyPicPro v8 board. As its name suggests, it is the third iteration of a successful family of Microchip PIC board.
The Mikroe board has been just modified for our laboratories usage.
Please note that, as a student, you can loan a board for free during your studies to work at home ;-) Just ask the laboratory responsible Pascal Sartoretti (sap) for the procedure to follow.
We, the PICEBS3 team, provide a comprehensive solution for
- Practical work for HEI course Information systems given in second year.
- All kind of project featuring a small-sized micro-controller.
What can be done with the PICEBS3?
The board is powerful enough to run applications with:
- LCD and touch screen interface
- Serial port usage (UART)
- CAN interface
- ...
To program this board, you do not require an external programming probe, as it already includes a "Microchip Snap"system for programming and debugging. All you need is an USB port and the free MPLAB-X IDE. Caution, the USB câble has to be an USB-A cable.
Hardware
([details]).
Here is a list of the main PICEBS2's characteristics:
- CPU PIC18F87K22
- High range PIC18 family with 128kB Flash & 4kB RAM
- RTC
- 12 bits ADC
- 11 timers
- UART, SPI, I2C
- ...
- Onboard PICKIT3 debugger
- Compatible with MPLABX
- Can be used standalone or turned off
- LCD Display
- 320x240, 265k colors
- Backlight
- Resistive touch screen
- Networking and communication
- CAN bus
- RS232
- PS2 keyboard
- Olimex UEXT
- Development
- All CPU pins are available on a connector
- Standard HES-SO//Valais 26 pin header on board
Software
- Source files for assembler laboratories
- Source files for C laboratories
- Tools
Tips & tricks
- CPU speed control
// to work at maximum CPU speed (64MHz) insert following code at start. PLLEN = 1; // activate PLL x4 OSCCON = 0b01110000; // for 64MHz cpu clock (default is 8MHz) // Caution -> the PLL needs up to 2 [ms] to start ! // Wait a moment if needed with: __delay_ms(2); ...
- Change one bit on a port
// to change one bit on a port, use LATx and not PORTx LATH2 = 1; // turn led on for example ...
- Interrupt on change on PORTB (RB4-RB7)
// to clear the interrupt flag you have to read the PORTB ... PORTB; // clear the latch change on PORTB RBIF = 0; // clear the interrupt itself ...
- Reduce current consumption
// To reduce consumption at minimum, do at least LCD_PowerOff(); // turn all LCD parts off UART_PowerOff(); // turn UART driver off Can_PowerOff(); // turn off MCP2515 chipset // And define unused GPIOs as output TRISB5 = 0; // for example ... // You can measure (between white and yellow test points) about 630 uA after a SLEEP();
- Link in low address range (download time reduced)
- To reduce the time to download, you need to write a linker special command In the "XC8 linker" - "Extra Linker Option" write the following line: "-L-ACODE=0x0-0x10000 -L-AMEDIUMCONST=0x0-0x10000" - Another solution is to have an interrupt routine (even if nothing in) The full program needs to be smaller than 50% of CPU Flash memory.
Bugs, issues, questions and comments
Feel free to contact the PICEBS2 team if you encounter a problem. Do not forget to have a look at the Tips & tricks section.