Board attiny84-tcs3200

This is a ATTINY84A-PU on a breadboard with a USB/Serial adapter, a TCS3200 color detector and 3 LED. No crystal.

The serial communication uses 1 wire for RX/TX. The AVR communication pin is connected to the RXD pin of the serial adapter and a 1k resistor is connected between the RXD and TXD pins (it could be replaced by a diode, Schottky preferably).

Pin Configuration

                      Vcc o   U   o Gnd
           XTAL1 CLKI PB0 o       o PA0 ADC0 AREF
                XTAL2 PB1 o       o PA1 ADC1 AIN0
                RESET PB3 o       o PA2 ADC2 AIN1
      INT0 OC0A CKOUT PB2 o       o PA3 ADC3 T0
        ICP OC0B ADC7 PA7 o       o PA4 ADC4 USCK SCL T1
OC1A SDA MOSI DI ADC6 PA6 o       o PA5 ADC5 DO MISO OC1B

Serial adapter wiring

TINY84 ->  2 : RXD <- Serial Adapter
             : TXD
           4 : DTR
          14 : GND
           1 : VCC

USBASP wiring

 USBASP -> 1  MOSI  7  <- TINY84
           2  VCC   1
           4  GND   14
           5  RST   4
           7  SCK   9
           9  MISO  8

tcs3200.h

 
/*  This file is part of the HWA project.
 *  Copyright (c) 2012,2015 Christophe Duparquet.
 *  All rights reserved. Read LICENSE.TXT for details.
 */
 
#define BOARD_TCS3200
 
/*  Device configuration
 */
#define HW_DEVICE_CLK_SRC               rc_8MHz
#define HW_DEVICE_CLK_PSC               1
#define HW_DEVICE_EXTERNAL_RESET        enabled
#define HW_DEVICE_SELF_PROGRAMMING      enabled
#define HW_DEVICE_DEBUG_WIRE            disabled
#define HW_DEVICE_WATCHDOG_ALWAYS_ON    no
#define HW_DEVICE_CLOCK_OUTPUT          disabled
#define HW_DEVICE_BROWNOUT_DETECTION    2500_2900mV
 
/*  Settings for building the Diabolo bootloader.
 *  (Settings for the host application are in the board's Makefile)
 */
#define DIABOLO_PIN_RX                  (pin,2)
#define DIABOLO_PIN_TX                  (pin,2)
#define DIABOLO_SYNC                    101
 
/*  Channel selection pins
 */
#define PIN_TCS3200_S2                  (pin,5)
#define PIN_TCS3200_S3                  (pin,3)
 
/*  Create a `PIN_OUTS` object consisting of the 4 consecutive I/O pins
 *  PA5,PA4,PA3,PA2 (14pdip: 8..11)
 */
#define PIN_OUTS                        (porta, 4, 2)
 
/*  Include HWA definitions
 */
#include <hwa/attiny84a_pu.h>