Integrate USB connectivity into your projects with FT2232 and TM4C129ENCZAD
Highly capable USB to serial interface converter
Published Mar 08, 2024
Click board™
FTDI Click
Dev. board
Fusion for Tiva v8
Compiler
NECTO Studio
MCU
TM4C129ENCZAD
Achieve high-speed USB 2.0 connectivity to serial interfaces such as UART (Universal Asynchronous Receiver/Transmitter), I2C (Inter-Integrated Circuit), and SPI (Serial Peripheral Interface)
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Hardware Overview
How does it work?
FTDI Click is based on the FT2232H, a 5th-generation high-speed USB to a serial interface converter from FTDI, capable of configuration in various industry standard serial or parallel interfaces. The entire USB protocol is handled on the chip, with no USB-specific firmware programming requirements. Still, it requires USB device drivers for operation, which are free from the official FTDI page. It can work at high speed (480Mbps) and full speed (12Mbps), depending on the usage, alongside a dual Multi-Protocol Synchronous Serial Engine (MPSSE) used to simplify synchronous serial protocol between USB and available interfaces. The FT2232H can communicate with the host MCU over the mikroBUS™ socket using one of the available interfaces (UART, I2C, SPI). The SPI interface can be used as is, while one of the other two has to be selected by the I2C UART jumper, with UART
chosen as a default. Each interface is compatible with an LED indicator marked as TX/RX that signals data transmission. In addition to the communication pins, this board has some additional routed to the RST, PWM, and INT pins of the mikroBUS™ socket and marked as BC0, BC1, and BC2 used for configuration purposes for the MPSSE, or FIFO interface. For additional information on these pins, consult the attached FT2232H datasheet. This Click board™ also features the CAT93C46, a 1K-bit serial EEPROM from Catalyst Semiconductor that can be accessed directly from the FT2232H. The FT2232H uses external EEPROM to configure operational configuration mode and USB description strings. The EEPROM also allows each FTDI channel to be independently configured. It customizes various values and parameters, including remoted Wake Up, power descriptor value, and more. In addition,
FTDI Click features the MCP4921, a 12-bit DAC from Microchip, that communicates with the host MCU over an SPI serial interface of the mikroBUS™ socket. Activated using an FTDI signal over a BD4, it can be used as a reference for external peripherals with a value from the VO pin routed to the AN pin of the mikroBUS™ socket. This Click board™ can be operated only with a 3.3V logic voltage level. Considering that the board can be powered via USB and used as a standalone device, using an additional LDO, the AP7331, in this way, the existence of the voltage of both mikroBUS™ power lines is ensured. The board must complete the proper logic voltage level conversion before use with MCUs with different logic levels. However, the Click board™ comes equipped with a library from FTDI, containing functions and an example code that can be used as a reference for further development.
Features overview
Development board
Fusion for TIVA v8 is a development board specially designed for the needs of rapid development of embedded applications. It supports a wide range of microcontrollers, such as different 32-bit ARM® Cortex®-M based MCUs from Texas Instruments, regardless of their number of pins, and a broad set of unique functions, such as the first-ever embedded debugger/programmer over a WiFi network. The development board is well organized and designed so that the end-user has all the necessary elements, such as switches, buttons, indicators, connectors, and others, in one place. Thanks to innovative manufacturing technology, Fusion for TIVA v8 provides a fluid and immersive working experience, allowing access
anywhere and under any circumstances at any time. Each part of the Fusion for TIVA v8 development board contains the components necessary for the most efficient operation of the same board. An advanced integrated CODEGRIP programmer/debugger module offers many valuable programming/debugging options, including support for JTAG, SWD, and SWO Trace (Single Wire Output)), and seamless integration with the Mikroe software environment. Besides, it also includes a clean and regulated power supply module for the development board. It can use a wide range of external power sources, including a battery, an external 12V power supply, and a power source via the USB Type-C (USB-C) connector.
Communication options such as USB-UART, USB HOST/DEVICE, CAN (on the MCU card, if supported), and Ethernet is also included. In addition, it also has the well-established mikroBUS™ standard, a standardized socket for the MCU card (SiBRAIN standard), and two display options for the TFT board line of products and character-based LCD. Fusion for TIVA v8 is an integral part of the Mikroe ecosystem for rapid development. Natively supported by Mikroe software tools, it covers many aspects of prototyping and development thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.
Microcontroller Overview
MCU Card / MCU
Type
8th Generation
Architecture
ARM Cortex-M4
MCU Memory (KB)
1024
Silicon Vendor
Texas Instruments
Pin count
212
RAM (Bytes)
262144
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Click board™ Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Fusion for Tiva v8 as your development board.
Track your results in real time
Application Output
1. Application Output - In Debug mode, the 'Application Output' window enables real-time data monitoring, offering direct insight into execution results. Ensure proper data display by configuring the environment correctly using the provided tutorial.
2. UART Terminal - Use the UART Terminal to monitor data transmission via a USB to UART converter, allowing direct communication between the Click board™ and your development system. Configure the baud rate and other serial settings according to your project's requirements to ensure proper functionality. For step-by-step setup instructions, refer to the provided tutorial.
3. Plot Output - The Plot feature offers a powerful way to visualize real-time sensor data, enabling trend analysis, debugging, and comparison of multiple data points. To set it up correctly, follow the provided tutorial, which includes a step-by-step example of using the Plot feature to display Click board™ readings. To use the Plot feature in your code, use the function: plot(*insert_graph_name*, variable_name);. This is a general format, and it is up to the user to replace 'insert_graph_name' with the actual graph name and 'variable_name' with the parameter to be displayed.
Software Support
Library Description
This library contains API for FTDI Click driver.
Key functions:
ftdi_generic_write- This function writes a desired number of data bytes by using UART serial interfaceftdi_generic_read- This function reads a desired number of data bytes by using UART serial interface
Open Source
Code example
The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.
/*!
* @file main.c
* @brief FTDI Click Example.
*
* # Description
* This example demonstrates the use of FTDI click by echoing back all the received messages.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the driver and logger.
*
* ## Application Task
* Any data which the host PC sends to the Virtual COM Port (for example, typed into the terminal
* window in UART Terminal) will be sent over USB to the click board and then it will be read and
* echoed back by the MCU to the PC where the terminal program will display it. The data will also
* be displayed on the USB UART.
*
* @author Stefan Filipovic
*
*/
#include "board.h"
#include "log.h"
#include "ftdi.h"
static ftdi_t ftdi;
static log_t logger;
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
ftdi_cfg_t ftdi_cfg; /**< Click config object. */
/**
* Logger initialization.
* Default baud rate: 115200
* Default log level: LOG_LEVEL_DEBUG
* @note If USB_UART_RX and USB_UART_TX
* are defined as HAL_PIN_NC, you will
* need to define them manually for log to work.
* See @b LOG_MAP_USB_UART macro definition for detailed explanation.
*/
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
ftdi_cfg_setup( &ftdi_cfg );
FTDI_MAP_MIKROBUS( ftdi_cfg, MIKROBUS_1 );
if ( UART_ERROR == ftdi_init( &ftdi, &ftdi_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
uint8_t rx_data = 0;
if ( ftdi_generic_read ( &ftdi, &rx_data, 1 ) > 0 )
{
ftdi_generic_write ( &ftdi, &rx_data, 1 );
log_printf( &logger, "%c", rx_data );
}
}
int main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
return 0;
}
// ------------------------------------------------------------------------ END
