Generally, the initial PORTA setting as following for I/O fuction: clrf PORTA movlw 0x07 turn comparators off and movwf CMCON enable pins for I/O functions Note: Ensure the above setting done at Bank 0. If using PORTA pins as interfacing I/O, you need to define/set the I/O fuction for PIC16f628.*Tip on source code migration from Pic16f8X series to Pic16f62X series* This will display on the LCDĭownload hex file for Pic16F84 here: F84dec.zip.ĭownload hex file for Pic16F628 here: 628dec.zip. Hex value for the ADC channel is FFF equal to decimel number 4095. This simple multi channel digital voltmeter device (using 16 bit for calculation). The following hex file are use Microchip Math Library (assembler code) for The math fuction for assembler code canįind from Microchip Website You can also find some documen of math fuctionįrom or use C compiler such as Piclite for PIC16f8X/c8x series, cc5x c, This need some mathįuction such as divide function and floating point. Which the binary code has been change to ASCII code with decimen number. Simple multi channel digital voltmeter The circuit diagram same as above 12 bit ADC interfacing. The hex file for Pic16f628 download here: 628S_L.zip.ģ. The hex file for Pic16f84 download here: F84S_L.zip.
#Pickit 2 pinout vs pickit 3 pinout software#
Using software implemeted SPI protocol enableĬommunication with more than one ADC device. You will see the hex value change accordingly. To select the ADC channel (8 channel from CH0 to CH7). On LCD with hex value (conversion from binary code). The example of this communication shown as following circuit diagram. Software implemeted SPI protocol can be done to communicate with 12 bit MCP3028 ADC device. The Pic16f84 or Pic16f628 didn't had hardware SPI peripheral.
#Pickit 2 pinout vs pickit 3 pinout serial#
Software SPI interfacing ADC with Pic16F84/Pic16F628 Communication with the MCP3028 ADC chip is done using a simple serial interface compatible The source code/hex file for Pic16f628 download here: 628SLCD.zip. The source code/hex file for Pic16f84 download here: F84SLCD.zip. When using this optrex 2 X 20 LCD modules, the Vref (pin 3 at LCD) need around -4.5v to -5.5V supply. The Hitachi compatible 2 X 20 LCD modules (optrex) drive by Pic16F84 MCU show on figure 2. The Hitachi compatible 2 X 16 LCD modules drive by Pic16F84 MCU show on figure 1. You can find many reference from internet.įollowing diagram show the serial interfacing Hitachi compatible 2 X 16 LCD modules with Pratice to familiar with parallel interfacing. Before you attempt to do serial interfacing, it is good They were few shift register can be used such as 74HC164, 74HC595, CD4094 and anyĬompatible 8 bit shift register. The I/O pin can be cut down to 3 pin by serial iterfacing using shift Parallel interfacing LCD with MCU at least need 6 I/O pins (4 bit mode) and maximun can up toġ1 I/O pins (8 bit mode).