Microchip Technology PIC32CM JH01, Руководство пользователя

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4.5 Embedded Debugger Implementation
The evaluation kit contains an Embedded Debugger (EDBG) that can be used to program and debug the PIC32CM
JH01 using Serial Wire Debug (SWD). The Embedded Debugger also includes a Virtual COM port interface over the
UART, a Data Gateway Interface over SPI, TWI (I²C), and four of the PIC32CM JH01 GPIOs.
MPLAB X IDE can be used as a front end for the Embedded Debugger.
4.5.1 Serial Wire Debug
The Serial Wire Debug (SWD) uses two pins to communicate with the target. For additional information on using the
programming and debugging capabilities of the EDBG, refer to the
Embedded Debugger User Guide .
Table 4-32. SWD Connections
PIC32CM JH01 pin Function Schematic Net Name Shared Functionality
RESET Reset TARGET_RESET
RESET button, Arduino, Cortex Debug
RESET, TA100
PA30 Serial Wire Clock SWCLK Cortex Debug SWCLK
PA31 Serial Wire Data IN/OUT SWDIO Cortex Debug SWDIO
4.5.2 Virtual COM Port
The Embedded Debugger acts as a Virtual COM Port gateway by using one of the PIC32CM JH01 UARTs. For
additional information on using the Virtual COM port, refer to the
Embedded Debugger User Guide .
Table 4-33. Virtual COM Port Connections
PIC32CM JH01 pin Function Schematics Net Name Shared functionality
PB10 SERCOM4/PAD[2] UART TX PB10_CDC_UART_TX -
PB11 SERCOM4/PAD[3] UART RX PB11_CDC_UART_RX -
4.5.3 Data Gateway Interface
The Embedded Debugger features a Data Gateway Interface (DGI) by using either a SPI or I²C interface. The DGI
can be used to send a variety of data from the PIC32CM JH01 to the Host PC. For additional information on using the
DGI interface, refer to the
Data Gateway Interface User’s Guide and Embedded Debugger User Guide.
Table 4-34. DGI Interface Connections When Using SPI
PIC32CM JH01 pin Function Schematic Net Name Shared functionality
PC09 GPIO SPI SS PC09_DGI_SPI_LEVEL (SS) -
PC12 SERCOM7/PAD[0] SPI MISO PC12_SPI_MISO EXT3, Arduino
PC14 SERCOM7/PAD[3] SPI SCK PC15_SPI_SCK EXT3, Arduino
PC15 SERCOM7/PAD[2] SPI MOSI PC14_SPI_MOSI EXT3, Arduino
Table 4-35. DGI Interface Connections When Using I
2
C
PIC32CM JH01 pin Function Schematic Net Name Shared functionality
PA16 SERCOM1/PAD[0] I
2
C SDA PA16_I2C_SDA EXT2, EXT3, Arduino
PA17 SERCOM1/PAD[1] I
2
C SCL PA17_I2C_SCL EXT2, EXT3, Arduino
Four GPIO lines are connected to the Embedded Debugger. The EDBG can monitor these lines and time stamp pin
value changes. This makes it possible to accurately time stamp events in the PIC32CM JH01 application code.
EV81X90A
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User Guide
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