Recent content by JohnSugar

  1. J

    MAX6955 (I2C, LEDs, STM32)

    Ok now it is working , if someone else have trouble to use the MAX9655 with discrete LEDs only here is the init : write_max6955(0xC0,0x01,0x00); //decode mode no decode write_max6955(0xC0,0x02,0x00); //global intensity min write_max6955(0xC0,0x03,0x07); //scan limit 0->7 digits...
  2. J

    MAX6955 (I2C, LEDs, STM32)

    Hi, i tried what you suggested all the LEDs turn on. It seems the chip isn't dead. I surely miss something in my init.
  3. J

    MAX6955 (I2C, LEDs, STM32)

    Hi ! Thank you for your answer i tried to mesure the outputs and there is no change. I tried other outputs (like GPIOs) and same issue. You must be right the data is not correct. If only i had an oscilloscope i could check ! Maybe i can find a small USB-logic analyser.
  4. J

    MAX6955 (I2C, LEDs, STM32)

    Hello, I'd like to control 7 10-led-bargrah to display some visual effects. I chose to use MAX6955 to drive them, it works by the serial interface I2C. I also use the stm32 discovery board. I followed the datasheet of the MAX6955 to make the wiring : - I connected the cathodes of each bargraph...
  5. J

    LCD datasheet

    Hi everyone, I'm looking for lcd datasheet. I got two displays from broken devices: a telephone (PHILIPS XL660) and a printer (CANON mp600). I couldn't find anything :( Thanks, John
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