TI Tiva C Series TM4C123G LaunchPad

Overview

The TM4C123GXL LaunchPad Evaluation Kit is a low-cost development platform for TI Tiva C Series TM4C123GH6PM microcontrollers. It features a high-performance ARM Cortex-M4F core running at 80 MHz with 256 KB flash and 32 KB SRAM.

The TM4C123GH6PM microcontroller includes:

Core.
- ARM Cortex-M4F with FPU, 80 MHz.
- Nested Vectored Interrupt Controller (NVIC).
- Memory Protection Unit (MPU).
Memory.
- 256 KB single-cycle flash (up to 40 MHz).
- 32 KB single-cycle SRAM.
- 2 KB EEPROM.
Communication.
- Eight UARTs.
- Four SSI/SPI modules.
- Four I2C modules.
- Two CAN 2.0 A/B controllers.
- USB 2.0 OTG/Host/Device (Full-Speed).
Timers.
- Six 64-bit general-purpose timers (twelve 32-bit).
- Six wide timers.
- Two watchdog timers.
Other.
- 16 PWM outputs.
- System control and clocks with PLL.

Hardware

The TM4C123GXL LaunchPad features:

On-board In-Circuit Debug Interface (ICDI) for programming and debugging
USB Micro-B connector for debug and power
Two user switches (SW1 on PF4, SW2 on PF0)
RGB LED (Red on PF1, Blue on PF2, Green on PF3)
Reset switch
Boosterpack-compatible headers exposing most MCU pins

Details on the TM4C123GXL LaunchPad can be found on the TI TM4C123GXL Product Page.

Supported Features

The tm4c123gxl board supports the hardware features listed below.

on-chip / on-board: Feature integrated in the SoC / present on the board.
2 / 2: Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.
vnd,foo: Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

`tm4c123gxl/ti_tm4c123gh6pm` target

On-target memory for this board target: 32 KiB of RAM, 256 KiB of Flash.

Type	Location	Description	Compatible
CPU	on-chip	ARM Cortex-M4F CPU1	`arm,cortex-m4f`
Clock control	on-chip	Generic fixed-rate clock provider1	`fixed-clock`
Flash controller	on-chip	TI Stellaris flash controller1	`ti,stellaris-flash-controller`
Interrupt controller	on-chip	ARMv7-M NVIC (Nested Vectored Interrupt Controller)1	`arm,v7m-nvic`
MTD	on-chip	Flash node1	`soc-nv-flash`
Pin control	on-chip	TI Tiva C Series pin controller1	`ti,tiva-c-pinctrl`
Serial controller	on-chip	TI Tiva C Series UART2 6	`ti,tiva-c-uart`
SRAM	on-chip	Generic on-chip SRAM1	`mmio-sram`
Timer	on-chip	ARMv7-M System Tick1	`arm,armv7m-systick`

Connections and IOs

UART

The TM4C123GXL has 8 UART modules. UART0 is connected to the on-board ICDI virtual COM port via PA0 (RX) and PA1 (TX).

UART	RX Pin	TX Pin
UART0	PA0	PA1
UART1	PB0	PB1

Building and Flashing

Building

Follow the Getting Started Guide instructions for Zephyr application development.

For example, to build the Hello World application for the TM4C123GXL LaunchPad:

# From the root of the zephyr repository
west build -b tm4c123gxl samples/hello_world

Flashing

The TM4C123GXL uses the on-board TI ICDI interface for flashing via OpenOCD.

# From the root of the zephyr repository
west build -b tm4c123gxl samples/hello_world
west flash

Debugging

# From the root of the zephyr repository
west build -b tm4c123gxl samples/hello_world
west debug

Console

The UART0 console is available through the on-board ICDI virtual COM port. Connect to the serial port at 115200 8N1.

On Linux:

$ screen /dev/ttyACM0 115200