PIC 16F1827 not running

Started by Andrew in Piclist3 years ago 7 replies

Hi, I am working on a project using a PIC 16F1827, using it's internal oscillator running at 8MHz. I can download firmware into the micro and...

Hi, I am working on a project using a PIC 16F1827, using it's internal oscillator running at 8MHz. I can download firmware into the micro and verify that the code has successfully been programmed. However the code does not appear to be running. I have verified this by writing code to toggle a pin and have viewed this pin on an oscilloscope. I have pasted my code below. Could someone enlighten m...


PIC24HJ64GP502 UARTs will not receive

Started by kabo...@NorthState.net in Piclist4 years ago 1 reply

I am attempting to establish serial communications with UART1 or 2=20 on a PIC24HJ64GP502. MPLAB IDE v8.76 and c30 v3.30.=20 I am using a...

I am attempting to establish serial communications with UART1 or 2=20 on a PIC24HJ64GP502. MPLAB IDE v8.76 and c30 v3.30.=20 I am using a MAX232 and serial-USB converter to a Win-7=20 PC running hyperterm (9600-N-8-1). If I pull the PIC and jumper=20 pins 21 and 22 together I get a proper echo on the PC, so the connectivity is good too/from the PIC. Current program does nothing but try t...


PIC A/D and Voltage Divider

Started by Max in Piclist6 years ago 11 replies

This group has been way too quite for too long. I thought I'd liven things up a bit by asking a question. I would like to use the on chip A/D...

This group has been way too quite for too long. I thought I'd liven things up a bit by asking a question. I would like to use the on chip A/D converter in a Pic 16F887 and I have some Microchip MCP1541 4.096 voltage reference devices. I need to be able to measure voltages up to around 18 volts. If I use a voltage divider that divides the input voltage by 5, I could measure up to 20.46 volts. So fa...


Troubleshooting I2C

Started by Max in Piclist6 years ago 4 replies

I have been trying to write to a 24LC1025 EEPROM which uses an I2C interface without success. The software I2C routines that I am using are the...

I have been trying to write to a 24LC1025 EEPROM which uses an I2C interface without success. The software I2C routines that I am using are the same ones that I have successfully used with a Dallas 1307 clock chip and were downloaded from the Dallas website back a few years ago. Using my Pickit2 programmer I wrote some data into the 24LC1025 chip and using these routines I am able to read the data...


speed of PIC vs 8051

Started by Mike Liu in Piclist6 years ago 4 replies

Hi all I have a question regarding the speed of microcontrollers. As I know that RISC mcus such as PIC need only 1 clock for each...

Hi all I have a question regarding the speed of microcontrollers. As I know that RISC mcus such as PIC need only 1 clock for each instruction while CISC need several clock (8051 need 12T). That's why PIC is usually faster than 8051 (for the same clock frequency). I noticed that there're many 8051 core microcontrollers (STC 8051 , siliconlab


Bootloader for PIC18F8722

Started by k5oor in Piclist6 years ago 3 replies

I plan to implement an assembly language bootloader for the PIC18F8722 microcomputer using AN1310 as a guide. It seems straight forward. Anyone...

I plan to implement an assembly language bootloader for the PIC18F8722 microcomputer using AN1310 as a guide. It seems straight forward. Anyone gone down this path before with comments or alternative suggestions? Virgil ------------------------------------


Code not running on PIC16F88 when pic kit 3 is disconnected

Started by Andrew in Piclist6 years ago 14 replies

Hi, I have a project where I have a PI16F88 to communicate with a PC via RS232, and control a relay, and read an ADC. When I have the PIC kit 3...

Hi, I have a project where I have a PI16F88 to communicate with a PC via RS232, and control a relay, and read an ADC. When I have the PIC kit 3 interface connected to my board and MPLAB is communicating with the PIC my code works fine. As soon as I disconnect the PIC kit 3 from my board, and reset the power the code stops running. I have a 1k resistor pulling MCLR to 5V, and a 0.1uF capacito...


Debugging PIC12F617

Started by Tony Rudzki in Piclist6 years ago 4 replies

All, Is it possible to connect a PIC12F617 and debug it as you would any other processor? The reason

All, Is it possible to connect a PIC12F617 and debug it as you would any other processor? The reason


4 x 3 keypad using 1 analog input

Started by mark_schilke in Piclist6 years ago 2 replies

Hi, Folks! I read the ED article in file "1 pin Keypad.PDF" posted by dave_mucha, and compared it to the "4x4 Keyboard with 1 Input" tip in...

Hi, Folks! I read the ED article in file "1 pin Keypad.PDF" posted by dave_mucha, and compared it to the "4x4 Keyboard with 1 Input" tip in Microchip's Tips & Tricks guide. The latter has far fewer components external to the PIC. Has anyone met with good success using the method in that tip? The device I am designing will use a 4 x 3 keypad, with a layout similar to a Touch Tone telephone....


Power reset (VCC) of some device from PIC OUTPUT PIN without using relay

Started by AMIT KAPOOR in Piclist6 years ago 3 replies

Hello Friends, ? Good Morning!... ? I need?help/suggestion from you! ? Actually?I have a device which communicates with PIC using the serial...

Hello Friends, ? Good Morning!... ? I need?help/suggestion from you! ? Actually?I have a device which communicates with PIC using the serial communication. but sometimes this device stops communicating.In this case , this device needs VCC reset( POWER RESET)..So what i want is to reset this device from PIC whenever it stops communicating ( basically disconnecting the VCC power of thi...


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