PIC32CZ CA70 Curiosity Evaluation Kit

The PIC32CZ CA70 Curiosity is an evaluation kit for PIC32CZ CA70 series.

Features

  • Processor

    • PIC32CZCA70144 processor

  • Memory

    • 512 kB RAM memory

    • 2 MB Flash

    • external 4 MB NOR Flash

LEDs

There is one green and one red LED on PIC32CZ CA70 Evaluation board. The LEDs can be activated by driving the connected I/O line to GND.

These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is defined. In that case, the usage by the board port is defined in include/board.h and src/sam_autoleds.c. The green LED0 is used to encode OS-related events as follows:

SYMBOL

Meaning

LED

LED_STARTED

NuttX has been started

OFF

LED_HEAPALLOCATE

Heap has been allocated

OFF

LED_IRQSENABLED

Interrupts enabled

OFF

LED_STACKCREATED

Idle stack created

ON

LED_INIRQ

In an interrupt

N/C

LED_SIGNAL

In a signal handler

N/C

LED_ASSERTION

An assertion failed

N/C

LED_PANIC

The system has crashed

FLASH

Thus if the LED is statically on, NuttX has successfully booted and is, apparently, running normally. If the LED is flashing at approximately 2Hz, then a fatal error has been detected and the system has halted.

Configurations

nsh

Basic configuration with NuttShell (nsh) console over UART1 port. This port is routed to debug USB, therefore the console is available on the USB port.

max

This configuration intends to provide example support of available peripherals. Currently only software buttons, USB device and micro SD card are supported.

Flash

There are two debug ports available on the board. 10 pin Cortex debug at J300 header and 20 pin Cortex Trace Coreshight at J502 header. It is possible to use SWD pins and connect ST Link or other programmer to the microcontroller through these pins. The following command can be used to program the board over ST Link with OpenOCD.

$ openocd -f boards/arm/samv7/common/tools/pic32cz-curiosity-stlink.cfg -c "program nuttx reset exit"

Note that PIC32CZ CA70 MCU default setting after erase is boot from ROM instead of flash. Boot from flash can be setup from OpenOCD with a following command.

mww 0x400e0c04 0x5a00010b

The board can be also flashed over USB with a proprietary Microchip’s MPLAB X IDE