Microchip PIC
From Bashlinux
Cautions
Config
- NEVER disable the PIC's /MCLR (Reset) pin function.
- NEVER program a PIC "in circuit" with ANY other connections to the target board.
Circuit Design
ALWAYS set MCLRE_ON in the config options and have MCLR pin with a 10K pull-up resistor to Vdd.
Initialization
ALWAYS set the input pins and clear the output pins, excepting UART TX/RX.
i.e.
- SDO should have TRISX bit cleared
- SDI should have TRISX bit set.
Configuration Fuses
HI-TECH PICC (MPLAB IDE v8.x)
__CONFIG(1,HS&CPUDIV1) ; // Conf Reg 1: Use external crystal 4MHz __CONFIG(2,WDTDIS) ; // Conf Reg 2: Watchdog off __CONFIG(3,PBADDIS) ; // Conf Reg 3: Configure PORTB<4:0> pins as digital I/O on Reset __CONFIG(4,XINSTDIS) ; // Conf Reg 4: Extended CPU Enable Disabled
MPLAB XC (MPLAB X v2.x/v3.x)
#pragma config PLLDIV = 1 // No prescale (4 MHz oscillator input drives PLL directly) #pragma config WDT = OFF // Watchdog off #pragma config PBADEN = OFF // Configure PORTB<4:0> pins as digital I/O on Reset #pragma config CPUDIV = OSC1_PLL2 // [OSC1/OSC2 Src: /1][96 MHz PLL Src: /2] #pragma config FOSC = HS // HS oscillator, HS used by USB
Development boards
- Product-spscific boards - 8-bit, 16-bit, and 32-bit Explorer boards and development kits
- Curiosity boards - Rapid prototyping boards for first-time users
- Digilent - Training board with peripherals and prototyping area