Board pro-mini

Detailed Description

This is an Arduino clone board with a MEGA328P-AU microcontroller and a 16 MHz crystal.

The serial communication uses 1 wire for RX/TX. The board RX pin is connected to the RXD pin of the serial adapter and a 1k resistor is connected between the RXD and TXD pins. Alternately, RX can be tied to VCC through a 1k resistor and a Schottky diode connected between TXD (anode) and RXD (cathode).

Serial adapter wiring

BOARD -> RXD : RXD <- Serial Adapter
             : TXD
         RST : DTR
         GND : GND
         VCC : VCC

USBASP wiring

 USBASP -> 1  MOSI  11  <- BOARD
           2  VCC   VCC
           4  GND   GND
           5  RST   RST
           7  SCK   13
           9  MISO  12

pro_mini.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_rxd
#define DIABOLO_SYNC                    51
 
/*  Board pins
 */
#define ARDUINO
 
#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_ANALOG_INPUT                (pin,adc0)
 
#define PIN_LED                         (portb,5)
 
/*  Include HWA definitions
 */
#include <hwa/atmega328p_au.h>