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Recent content by mettiblack72

  1. M

    STM32 DMA Receive Uart | GPS Neo-7m Module

    thank you so much , I'll examine and report as soon as possible 1680174307 thank you for your reply Yes GPS module outputs NMEA sentences, and I want to extract GPRMC sentences , It has lots of bytes of data that interrupts mcu again and again every second , this is reason that I use DMA
  2. M

    STM32 DMA Receive Uart | GPS Neo-7m Module

    Hi , thank you for your reply 1) at the first variables /* GPS Variables */ uint8_t GPSData_GPRMC[140] = {0}; 2) and then initilization of peripherals /* Initialize all configured peripherals */ MX_DMA_Init(); MX_USART2_UART_Init(); 3) and then receive data from gps with dma...
  3. M

    STM32 DMA Receive Uart | GPS Neo-7m Module

    Hello, My MCU is Stm32f407vet6 and I run Ublox GPS Module Neo-6m with DMA , My Module is connected to USART2 of MCU , I received 140 Bytes of GPS data every 100ms and saved GPRMC data , All things is OK in normal operation, sometimes GPS module can't find satellites and send invalid data to MCU...
  4. M

    Custom Design with ATSAM3x8e

    Thank a lot dear FenTrac I decided to design Atsam3x8e HeaderBoard and connect directly usb connector to mcu and I will release result here next few days
  5. M

    Custom Design with ATSAM3x8e

    Thanks a lot for your reply In my Custom Design , Can I connect USB pins of Atsam3x8e directly to usb connector and program mcu with arduino IDE through usb ?
  6. M

    Custom Design with ATSAM3x8e

    thanks for your reply , really at the first I want to test Atsam3x8e with Arduino Due board and then design my schematic but I can't program Arduino Due with UART0 ! the connection that I used is attached thanks a lot
  7. M

    Custom Design with ATSAM3x8e

    Hello I want to design custom Board with ATSAM3x8e that used in Arduino Due , and also I want use Arduino IDE to program MCU I want to use ft232 USB to TTL Convertor and connect to UART(PA8 , PA9) for programming ... But It's not working what should I do ?? please help me about the circuit...
  8. M

    How to read mouse position from PC

    thanks for reply can you guide me , for example if I want to move the mouse cursor to (x, y) from the current position ? what should I do ?
  9. M

    How to read mouse position from PC

    Hello , I use stm32f103c8t6 and I want to run USB HID Mouse , I can connect to my PC and change the position of mouse cursor but I can't read the current mouse cursor position to use that , I can just add the X and Y value of cursor I use USBD_HID_SendReport( &USBD_Device , Buffer , 4 ) ; to...
  10. M

    multiplex multiple photodiodes to one transimpedance amp

    Hi , yes ... I think I should design 4 layer pcb for guarding and shielding thank you very much
  11. M

    multiplex multiple photodiodes to one transimpedance amp

    Hi thanks for reply your opinion is very good but my final project price is very important for me... please say me your thought about this issue I checked the pcb of receiver board of IR frame with multimeter in buzzer mode .... It has 42 photodiodes and 7 analog mux(8 channel) and one...
  12. M

    multiplex multiple photodiodes to one transimpedance amp

    Hi thanks for reply if I use a TIA for each photodiode then my project cost will be very expensive ... I found one receiver board of IR frame touch panel , and circuit designer use just one TIA and seven analog multiplexers for 42 photodiodes !! please help :-|
  13. M

    multiplex multiple photodiodes to one transimpedance amp

    Hello TIA = transimpedence I have lots of photodiodes for barrier detection , I tested one photodiode with one TIA op amp , and it was OK 1) Now I want to multiplex multiple photodiodes for my project , and I use 74HC4051 IC for that , I read in datasheet that between each of inputs to...
  14. M

    what to do with 74HCxxx Control Pin ?

    Hello I don't know what should I do with 74HCxxx Control Pins For example in 74HC245 , we have OE pin Should I connect this pin directly to GND or with pull down resistor ? and what's the value of pull down resistor ? thanks a lot
  15. M

    [SOLVED] Design IR Receiver Module - like tsop1738 internal circuit

    Hi, - In transmit side I use this circuit , Because I don't need data processing I delete AND gate and produce PWM pulse (f = 40kHz) to mosfet gate - and now I should receive this pulse in receiver side thanks a lot
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