Board nanodccduino

This is an Arduino clone board with a MEGA328P-AU microcontroller, a 16 MHz crystal and a CH340 USB/Serial adapter.

Note

I've discovered that my Linux driver for CH340/CH341 is buggy and does not send parity bytes. So, use the 51 synchronization sequence.

USBASP wiring

 USBASP -> 1  MOSI  D11 <- BOARD
           2  VCC   5V
           4  GND   GND
           5  RST   RST
           7  SCK   D13
           9  MISO  D12

nanodccduino.h

 
/*  This file is part of the HWA project.
 *  Copyright (c) 2012,2015 Christophe Duparquet.
 *  All rights reserved. Read LICENSE.TXT for details.
 */
 
/*  These are mostly the values as the board is shipped, except the bootsection
 *  size which is 1024 with Diabolo instead of 2048 with the Arduino bootloader.
 */
#define HW_DEVICE_BOOT                  bootloader
#define HW_DEVICE_BOOTSECTION_SIZE      1024
 
#define HW_DEVICE_CLK_SRC               low_power_xosc
#define HW_DEVICE_CLK_SRC_HZ            16000000
#define HW_DEVICE_CLK_PSC               1
#define HW_DEVICE_STARTUP_DELAYS        16KCK_14CK_64ms
#define HW_DEVICE_BROWNOUT_DETECTION    4100_4500mV
#define HW_DEVICE_SELF_PROGRAMMING      enabled
 
#define HW_DEVICE_EXTERNAL_RESET        enabled
#define HW_DEVICE_DEBUG_WIRE            disabled
#define HW_DEVICE_WATCHDOG_ALWAYS_ON    no
#define HW_DEVICE_CLOCK_OUTPUT          disabled
 
/*  Settings for building the Diabolo bootloader
 *  Settings for the Diabolo application are in the board's Makefile
 */
#define DIABOLO_PIN_RX                  (pin,rxd)
#define DIABOLO_PIN_TX                  (pin,txd)
#define DIABOLO_SYNC                    51
 
/*  Board pins
 */
#define ARDUINO
#define NANODCCDUINO
 
#define PIN_RX0                         (portd,0)
#define PIN_TX1                         (portd,1)
#define PIN_D2                          (portd,2)       // INT0
#define PIN_D3                          (portd,3)       // OC2B INT1
#define PIN_D4                          (portd,4)       //      T0
#define PIN_D5                          (portd,5)       // OC0B T1
#define PIN_D6                          (portd,6)       // OC0A AIN0
#define PIN_D7                          (portd,7)       //      AIN1
 
#define PIN_D8                          (portb,0)       // ICP1
#define PIN_D9                          (portb,1)       // OC1A
#define PIN_D10                         (portb,2)       // OC1B SS
#define PIN_D11                         (portb,3)       // OC2A MOSI
#define PIN_D12                         (portb,4)       //      MISO
#define PIN_D13                         (portb,5)       //      SCK
 
#define PIN_A5                          (portc,5)       // SCL
#define PIN_A4                          (portc,4)       // SDA
 
#define PIN_SS                          (portb,2)
#define PIN_MOSI                        (portb,3)
#define PIN_MISO                        (portb,4)
#define PIN_SCK                         (portb,5)
 
#define PIN_ANALOG_INPUT                (pin,adc0)
 
#define PIN_LED                         (portb,5)
 
 
/*  Pins for swuart1
 */
#define PIN_TX2                         PIN_D8
#define PIN_RX2                         PIN_D9
 
/*  Include HWA MCU definitions
 */
#include <hwa/atmega328p_au.h>