Microstick for the PIC24
Microchip Microstick
• Easy to use, economical development
environment for 16-bit PIC Microcontrollers.
– Socketed connection for PIC24 family microcontrollers
– USB Powered; no external power required
– Built-in integrated programmer/debugger
• No bootloader needed
• We’ll use the PIC24HJ64GP502 microcontroller with the
Microstick
• Same family as PIC24HJ32GP202 but more program memory
– Same ISA and pinout
Board Configuration
Power supplied
through USB
cable
Programming using MPLAB
1.
2.
3.
4.
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6.
7.
Load the code into MPLAB IDE.
Inform MPLAB IDE what device is plugged in to the Microstick
Board by selecting the appropriate device from the
Configure>Select Device>Device menu. Choose PIC24HJ64GP502.
Build the project by selecting Project>Build All.
Connect the Microstick Board to the development computer via a
USB cable.
Enable the MPLAB IDE debugger by selecting Debugger>Select
Tool>Starter Kits.
Download your code into a device on the Microstick Board by
selecting Debugger>Program.
Run the application previously downloaded by selecting
Debugger>Run.
Configuration Bits
•Optionally, you can modify the configuration bits to
disable the Watchdog Timer
•Select Configure>Configuration Bits to change the timer
Writing LATx is the same as writing PORTx
A Demo
Program
RB15
.include "p24Hxxxx.inc"
.global __reset
.text
;Start of Code section
__reset:
mov #__SP_init, W15
mov #__SPLIM_init,W0
mov W0, SPLIM
; set bit 15 to 0 so RB15 is set to output
mov #0x7FFF,W4
mov W4,TRISB
mloop:
mov #0x8000,W5
mov W5,PORTB ; set bit 15 to 1
call delay
mov #0x0000,W5
mov W5,PORTB ; set bit 15 to 0
call delay
bra mloop
delay:
mov #0xFFFF,W6
dloop:
dec W6,W6
cp0 W6
bra NZ, dloop
return
.end
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PIC24HJ64GP502 microcontroller & the Microstick