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Original question:

Interfacing EM18 RFID reader module with CC3200

CC3200-LAUNCHXL: Problem with configuring rx pins of cc3200

Srivenkat Guntur
Prodigy 60 points
Part Number: CC3200-LAUNCHXL
Other Parts Discussed in Thread: CC3200, ENERGIA

I'm using CC3200 to read a rfid tag. Here I need to send serial data from tx pin of rfid module to rx pin of cc3200. I know that p55 is rx(0), but I'm unable to get the output. I tested the circuit with arduino and I'm successful. I guess it is something to do with rx pin of cc3200. Is there any code for how to turn P55 as rx pin? If so, please share it...

  • 0
    Guru 39650 points
    Hi,

    What developmental environment do you use? It is CCS or Energia? How do you have set UART jumpers (J7, J6)? This jumpers can connect UART to termial via USB or to BP headers.

    In case of that you use Eneriga, you should ask question at this forum forum.43oh.com/.../

    Jan
  • 0 in reply to Hnz
    Prodigy 60 points

    I have been trying with energia. I did not set any UART jumpers. I just gave connection to pin 55 and I'm trying to multiplex that pin into rx. Is it more direct if I use CCS instead of energia?

  • 0 in reply to Srivenkat Guntur
    Guru 79905 points
    Hi,

    UART0 at CC3200 LaunchPad (pin55 - CC_GPIO_01, pin57 - CC_GPIO_02) are connected to jumpers J6, J7. By this jumpers you can select UART connection to UART->USB converter via FTDI chip or pins can be connected to boosterpack connector. Please see www.ti.com/.../swru372 at chapter 2.4.4.

    Selection of IDE depends on your needs. If you want to use Arduino like IDE, you can select Energia. For development in C with full debug support by JTAG you can use CCS or IAR.

    Jan
  • 0 in reply to Jan D
    Prodigy 60 points

    I went through that blog and my board is in UART Flashing mode. Let me put my problem more clear. I have em18 module that reads rfid tag and send the serial data to CC3200. CC3200 must display it on serial monitor. Tx pin of EM18 has to go to RX pin of cc3200. Can p55 serves as default rx pin? or Should I change that pin function to UART_RX mode. My J6,J7 jumpers are in UART Flashing mode.

  • 0 in reply to Srivenkat Guntur
    Guru 79905 points
    Hi,

    Pins on CC3200 chip can be by software mapped by pinmux to different types of peripheral (see table 3-1 in datasheet www.ti.com/.../cc3200 ).

    If you want connect UART pins 55, 57 to PB connector, you need to set J6, J7 jumpers to BP position. Another option can be 2nd UART in CC3200. But I am not able give you advice how use UART1 in Energia IDE.

    Notice: It looks that EM18 use RX with TTL voltage levels. Do not forgot that CC3200 pins are not TTL tolerant.

    Jan
  • 0 in reply to Jan D
    TI__Mastermind 46271 points
    Closing this thread and continuing the discussion here: e2e.ti.com/.../793122

    -Seong