Difference between revisions of "Microchip PIC"
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− | = PIC = |
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== Cautions == |
== Cautions == |
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− | + | '''Config'''<br> |
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− | + | * NEVER disable the PIC's <tt>/MCLR</tt> (Reset) pin function. |
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− | + | * NEVER program a PIC "in circuit" with ANY other connections to the target board. |
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+ | |||
+ | '''Circuit Design'''<br> |
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+ | |||
+ | '''Initialization'''<br> |
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+ | i.e. |
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+ | * SDI should have <tt>TRISX</tt> bit set. |
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+ | |||
+ | == Configuration Fuses == |
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+ | '''HI-TECH PICC (MPLAB IDE v8.x)'''<br> |
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+ | __CONFIG(1,HS&CPUDIV1) ; // Conf Reg 1: Use external crystal 4MHz |
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+ | __CONFIG(2,WDTDIS) ; // Conf Reg 2: Watchdog off |
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+ | __CONFIG(3,PBADDIS) ; // Conf Reg 3: Configure PORTB<4:0> pins as digital I/O on Reset |
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+ | __CONFIG(4,XINSTDIS) ; // Conf Reg 4: Extended CPU Enable Disabled |
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+ | '''MPLAB XC (MPLAB X v2.x/v3.x)'''<br> |
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+ | #pragma config PLLDIV = 1 // No prescale (4 MHz oscillator input drives PLL directly) |
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+ | #pragma config WDT = OFF // Watchdog off |
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+ | #pragma config PBADEN = OFF // Configure PORTB<4:0> pins as digital I/O on Reset |
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+ | #pragma config CPUDIV = OSC1_PLL2 // [OSC1/OSC2 Src: /1][96 MHz PLL Src: /2] |
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+ | #pragma config FOSC = HS // HS oscillator, HS used by USB |
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− | + | == IDEs == |
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+ | * [http://www.microchip.com/archived MPLAB] - Discontinued Microchip's IDE |
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+ | * [http://www.microchip.com/mplabx/ MPLAB X] - Official's Microchip IDE |
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+ | * [http://chipkit.s3.amazonaws.com/index.html MPIDE] - Arduino like IDE for ChipKit & Fubarino |
Revision as of 18:40, 2 February 2017
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