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GLADKIH_UA Guest
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PIC24F64GA002 |
Posted: Thu Jan 21, 2010 2:06 pm |
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Hello people. Sorry by my language - I'm from Ukraine. I have a question. I want to have 32Mhz in this PIC.
Code: |
#FUSES NOWDT //No Watch Dog Timer
#FUSES NOJTAG //JTAG disabled
#FUSES NOPROTECT //Code not protected from reading
#FUSES NOWRT //Program memory not write protected
#FUSES NODEBUG //No Debug mode for ICD
//#FUSES NOCOE //Device will reset into operational mode
#FUSES ICSP1 //ICD uses PGC2/PGD2 pins
#FUSES WINDIS //Watch Dog Timer in non-Window mode
#FUSES WPRES128 //Watch Dog Timer PreScalar 1:128
#FUSES WPOSTS16 //Watch Dog Timer PostScalar 1:32768
#FUSES IESO //Internal External Switch Over mode enabled
#FUSES FRC_PLL //Internal Fast RC oscillator with PLL
#FUSES NOCKSFSM //Clock Switching is disabled, fail Safe clock monitor is disabled
#FUSES OSCIO //OSC2 is general purpose output
#FUSES NOPR //Pimary oscillater disabled
#FUSES I2C1SELd
#use delay(clock=32000000)
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Before programming I see that frequency is not 32Mhz. She is 16Mhz or something like that.
Please help me. And I have question about #Fuses. Where can I read about every #Fuses of this series PIC24F. |
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FvM
Joined: 27 Aug 2008 Posts: 2337 Location: Germany
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Posted: Thu Jan 21, 2010 3:24 pm |
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You find all fuses details in the Microchip datasheet of the respective chip, in the Special Features/Configuration
Bits paragraph. In addition you should always read the oscillator configuration chapter to understand
the clocking options and configuration parameters of the chip.
I didn't use PIC24 with FRC_PLL yet, but as far as I understand, the fuses are basically correct. The CLKDIV
register RCDIV bits are however defaulting to a divider factor of 2, so you get 16 MHz after PLL. CCS C
has a setup_oscillator() built-in function to set among others CLKDIV register.
Unfortunately, I can't tell you the correct parameters for your setting. If it can't be derived from the given documentation,
I would most likely program the register directly. |
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gladkih Guest
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Posted: Fri Jan 22, 2010 8:57 am |
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FvM wrote: | You find all fuses details in the Microchip datasheet of the respective chip, in the Special Features/Configuration
Bits paragraph. In addition you should always read the oscillator configuration chapter to understand
the clocking options and configuration parameters of the chip.
I didn't use PIC24 with FRC_PLL yet, but as far as I understand, the fuses are basically correct. The CLKDIV
register RCDIV bits are however defaulting to a divider factor of 2, so you get 16 MHz after PLL. CCS C
has a setup_oscillator() built-in function to set among others CLKDIV register.
Unfortunately, I can't tell you the correct parameters for your setting. If it can't be derived from the given documentation,
I would most likely program the register directly. |
thanks for answer. |
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