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MSP430F6659: SYS/BIOS: change freqquency

Hank Chu
Expert 1340 points
Other Parts Discussed in Thread: MSP430F6659

Nice to meet you.

We are developing a product with TI MSP430F6659 MCU.

About the F/W (user applicatipon), it is developed by CCS 5.5.0.00077 + SYS/BIOS 6.35.4.50.

The H/W design uses external 20MHz crystal for XT2.

 

Could you do us a favor to tell us how to change the frequency of XT2 in the source codes of SYS/BIOS?

Thank you.

 

  • 0
    Guru 58965 points

    Why do you still ask about 20 MHz crystal for XT2? I thought you have already changed to 24 MHz. I would use 4 MHz instead.

  • 0
    Guru 92251 points

    Hank Chu said:
    Could you do us a favor to tell us how to change the frequency of XT2 in the source codes of SYS/BIOS?

    Looking at the TI-RTOS for MSP430 USB Serial Device example for the MSP-EXP430F5529 Launchpad shows there is a USB_config/descriptors.h in the project which defines the XT2 frequency:

    #define USB_XT_FREQ_VALUE       4.0   // Indicates the freq of the crystal on the oscillator indicated by USB_PLL_XT
#define USB_XT_FREQ       USBPLL_SETCLK_4_0  // Indicates the freq of the crystal on the oscillator indicated by USB_PLL_XT

  • 0 in reply to Chester Gillon
    Expert 1340 points

    Thanks for your information.

    Could you do us a favor to tell us the modifications for timer_A, I2C and UART interfaces in SYS/BIOS, too?

    Thank you.

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