UART0 阻塞发送教程

# UART0 Blocking TX Example

Minimal reference for sending text from the LCKFB Tianmengxing MSPM0G3507 board to a PC over UART0.

This example is based on the verified 26testproject4 UART smoke test. It is not a complete CCS import project. It is an agent-readable reference showing the .syscfg and C patterns that were verified on real hardware.

Clock Note#

This example uses the 80 MHz clock-tree pattern summarized in ../../references/hardware_validation_notes.md:

• CPUCLK: 80 MHz
• HFXT: 40 MHz input on PA5 / PA6
• SYSPLL: enabled
• ULPCLK divider: 2
• MFCLK gate: enabled

This differs from the older empty_project and led_blink examples, which are 32 MHz baseline examples. In actual Tianmengxing projects, 80 MHz is a common configuration, especially before UART, motor, PID, and timing-sensitive work.

UART Setup#

• UART instance: UART0
• TX: PA10
• RX: PA11
• Baud rate: 115200
• Data format: 8N1
• Observed PC adapter: CH340 on COM6

The verified generated header contained:

#define UART_0_INST            UART0
#define UART_0_INST_FREQUENCY  40000000
#define GPIO_UART_0_TX_PIN     DL_GPIO_PIN_10
#define GPIO_UART_0_RX_PIN     DL_GPIO_PIN_11
#define UART_0_BAUD_RATE       (115200)

Files#

• example.syscfg: 80 MHz clock tree, PB22 LED, and UART0 TX/RX configuration
• src/main.c: blocking UART string transmit plus PB22 blink
• manifest.json: machine-readable summary for example selection

PC-Side Test#

Close VOFA+ or any other program occupying the serial port, then run:

python scripts\serial_console.py --list
python scripts\serial_console.py -p COM6 -b 115200 --timestamp --duration 10

Expected output:

Hello World! 316
Hello World! 317

Agent Notes#

• Treat this as a blocking TX smoke test only.
• Do not assume this is the final DMA / variable-length receive solution.
• Rebuild after .syscfg edits and inspect the local generated ti_msp_dl_config.h.
• For automated flashing after 80 MHz clock-tree changes, use DSLite System Reset: -r 2 -u.