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Adi

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About Adi

  • Rank
    Noob Class

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  • Location
    USA
  • Interests
    MSP 430 , Embedded Systems
  1. Also, your shared code would greatly help. I see you have used pin 1.2 on msp430g2553, set as SPI master. Can I use any other pin on the board ? like 1.7 ? I already have another board communicating over UART using pin 1.2. I wonder, how well can I sync both UART & SPI on same controller, especially with tight timing for WS2811. I imagine, I will have to go really low on FPS, about 20 fps with limited number of LEDs, like a strip of 30 and manage my UART activities only during reset pulse time on LED chip. Correct me if I'm wrong.
  2. Thank you for responding RobG. I'm still trying to avoid bit banging assembly and use timer interrupts to generate PWM with 20% & 50% duty cycle for 0 & 1 respectively. If you have tried already, can you suggest if it's possible with WS2811 ? I read your very first question in this forum and OPossum thinks it's duty cycle that chip looks for. I wonder if you did any further discovery into it ? Yes, I changed my MCLK to run at 8MHz now (& may further update it to 16 MHz). With that, I can have width of 0 bit pulse to like 25 uS. Roughly running at 20 kHz frequency. Datashee
  3. This library is awesome. I'm trying to integrate it into my existing firmware. My MSP430G2553 is running at DCO 1MHz.. How can I adjust the timings, or any other trick to make this code calculated for 16MHz cycle run on my existing firmware (@1MHz) ?
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