The PUGAUGE is intended to be a base platform for devices to display Information in an environment where low power requirements are mandatory.
Examples are:
Bike computers
Thermometers
mobile measurement devices
Hardware
8-Character Segmented LCD 14-segment Display
Atmel AVR ATmega6490A AVR microcontroller
Software
Platform
The PUGAUGE is intended to be Arduino-compatible. The application software shall benefit from the ease of use, familiarity of many developers and availability of many libraries for sensors and other peripherals.
Therefore, an extension to the Arduino IDE is developed to allow the PUGAUGE being selected as a board type in the Arduino IDE. This should not be too complicated, as the PUGAUGE processor is an Atmel AVR processor closely related to the Atmel AVR processors used in the Arduino UNO and MEGA.
Additionally the optiboot bootloader for the Arduino is being modified to run on the PUGAUGE and allow Arduino sketches to be uploaded onto the PUGAUGE.(zu ergänzen)
Application
A special LCD library is being developed that provides easy access to the on board LCD ( 8 characters, 14 segments plus decimal point and apostroph).(zu ergänzen)
Build notes
Connection of ATmega6490
In the first development version all circuitry is mounted on a solderless breadboard:
The ATmega6490 is mounted on the BBR .
LCD-Voltage Buffer Capacitor: 3x220nF FKC in parallel from ATmega6490 Pin 1 / BBR Pin 76 to GND
System Status LED: Port line PB0 (ATmega6490 Pin 19 / BBR Pin 94) to 330 Ohm to yellow LED to GND
In-System-Programmer (IST) USPasp connected to 10-pin 2x5 100mil-spaced Connector:
See also http://nerdyelectronics.com/usbasp-tutorial/ :
Connector seen on board pins
USBasp pin number USBasp pin MCU Pin +---+---+---+---+---+
1 MOSI MOSI | 2 | 4 | 6 | 8 |10 |
5 Reset Reset +---+---+---+---+---+
7 SCK SCK | 1 | 3 | 5 | 7 | 9 |
9 MISO MISO +---+---+---+---+---+
10 GND GND
2 Vcc Vcc
Signal name
description
10-pin-conn pin number
ATmega6490 pin name
ATmega6490 pin number
BBR pin number
MOSI
data from programmer to MCU
1
MOSI
21
96
Reset
reset pulse to MCU
5
Reset
30
5
SCK
serial clock to MCU
7
SCK
20
95
MISO
data from MCU to programmer
9
MISO
22
97
GND
Ground reference
10
GND
99,11,32,81
74,86,7,56
VCC
+5V supply from programmer
2
VCC
100,10,31,80
75,85,6,55
Serial-USB Adapter, connected to TXD/RXD of UART0 of ATmega6490:
Signal name
description
FT323-adapter pin
ATmega6490 pin name
ATmega6490 pin number
BBR pin number
GND
Ground reference
GND
GND
TXD
data from USB to MCU
TXD
RXD/PCINT0/PE0
2
77
RXD
data from MCU to USB
RXD
TXD/PCINT1/PE1
3
78
TQFP-100 Breakout board
When soldering the AVR6490 Chip in the TQFP-100 case to it's breakout board, I made an error:
I turned it 90 degrees to the right. Therefore Pin 1 of the chip appears at Pin 76 of the breakout board.
The algorithm to find the BBR pin when knowing the pin number on the TQFP-100 package of the ATmega6490 is:
BBR-pin = (TQFP-pin + 75) MOD 100
This table provides a correction lookup:
Pin of TQFP-100 ATmega6490A
Pin of breakout board
Pin of TQFP-100 ATmega6490A
Pin of breakout board
1
76
51
26
2
77
52
27
3
78
53
28
4
79
54
29
5
80
55
30
6
81
56
31
7
82
57
32
8
83
58
33
9
84
59
34
10
85
60
35
11
86
61
36
12
87
62
37
13
88
63
38
14
89
64
39
15
90
65
40
16
91
66
41
17
92
67
42
18
93
68
43
19
94
69
44
20
95
70
45
21
96
71
46
22
97
72
47
23
98
73
48
24
99
74
49
25
100
75
50
26
1
76
51
27
2
77
52
28
3
78
53
29
4
79
54
30
5
80
55
31
6
81
56
32
7
82
57
33
8
83
58
34
9
84
59
35
10
85
60
36
11
86
61
37
12
87
62
38
13
88
63
39
14
89
64
40
15
90
65
41
16
91
66
42
17
92
67
43
18
93
68
44
19
94
69
45
20
95
70
46
21
96
71
47
22
97
72
48
23
98
73
49
24
99
74
50
25
100
75
Connecting D301 LCD to ATmega6490 MCU
LCD pin name
pin functions
MCU pin name
MCU pin number
BBR pin number
pin_1
function/plane
digit
segment
com1
1
seg_s
com2
1
seg_f
com3
1
seg_e
com4
1
seg_d
SEG2
72
47
pin_2
function/plane
digit
segment
com1
1
seg_i
com2
1
seg_j
com3
1
seg_k
com4
1
seg_n
SEG3
71
46
pin_3
function/plane
digit
segment
com1
2
seg_s
com2
2
seg_f
com3
2
seg_e
com4
2
seg_d
SEG6
68
43
pin_4
function/plane
digit
segment
com1
2
seg_i
com2
2
seg_j
com3
2
seg_k
com4
2
seg_n
SEG7
66
41
pin_5
function/plane
digit
segment
com1
3
seg_s
com2
3
seg_f
com3
3
seg_e
com4
3
seg_d
SEG10
63
38
pin_6
function/plane
digit
segment
com1
3
seg_i
com2
3
seg_j
com3
3
seg_k
com4
3
seg_n
SEG11
58
33
pin_7
function/plane
digit
segment
com1
4
seg_s
com2
4
seg_f
com3
4
seg_e
com4
4
seg_d
SEG14
55
30
pin_8
function/plane
digit
segment
com1
4
seg_i
com2
4
seg_j
com3
4
seg_k
com4
4
seg_n
SEG15
54
29
pin_9
function/plane
digit
segment
com1
5
seg_s
com2
5
seg_f
com3
5
seg_e
com4
5
seg_d
SEG18
51
26
pin_10
function/plane
digit
segment
com1
5
seg_i
com2
5
seg_j
com3
5
seg_k
com4
5
seg_n
SEG19
50
25
pin_11
function/plane
digit
segment
com1
6
seg_s
com2
6
seg_f
com3
6
seg_e
com4
6
seg_d
SEG22
47
22
pin_12
function/plane
digit
segment
com1
6
seg_i
com2
6
seg_j
com3
6
seg_k
com4
6
seg_n
SEG23
46
21
pin_13
function/plane
digit
segment
com1
7
seg_s
com2
7
seg_f
com3
7
seg_e
com4
7
seg_d
SEG26
43
18
pin_14
function/plane
digit
segment
com1
7
seg_i
com2
7
seg_j
com3
7
seg_k
com4
7
seg_n
SEG27
41
16
pin_15
function/plane
digit
segment
com1
8
seg_s
com2
8
seg_f
com3
8
seg_e
com4
8
seg_d
SEG30
38
13
pin_16
function/plane
digit
segment
com1
8
seg_i
com2
8
seg_j
com3
8
seg_k
com4
8
seg_n
SEG31
37
12
pin_17
function/plane
digit
segment
COM3
75
50
pin_18
function/plane
digit
segment
COM2
76
51
pin_19
function/plane
digit
segment
COM1
77
52
pin_20
function/plane
digit
segment
COM0
78
53
pin_21
function/plane
digit
segment
com1
8
seg_a
com2
8
seg_b
com3
8
seg_c
com4
8
seg_p
SEG28
40
15
pin_22
function/plane
digit
segment
com1
8
seg_h
com2
8
seg_g
com3
8
seg_l
com4
8
seg_m
SEG29
39
14
pin_23
function/plane
digit
segment
com1
7
seg_a
com2
7
seg_b
com3
7
seg_c
com4
7
seg_p
SEG24
45
20
pin_24
function/plane
digit
segment
com1
7
seg_h
com2
7
seg_g
com3
7
seg_l
com4
7
seg_m
SEG25
44
19
pin_25
function/plane
digit
segment
com1
6
seg_a
com2
6
seg_b
com3
6
seg_c
com4
6
seg_p
SEG20
49
24
pin_26
function/plane
digit
segment
com1
6
seg_h
com2
6
seg_g
com3
6
seg_l
com4
6
seg_m
SEG21
48
23
pin_27
function/plane
digit
segment
com1
5
seg_a
com2
5
seg_b
com3
5
seg_c
com4
5
seg_p
SEG16
53
28
pin_28
function/plane
digit
segment
com1
5
seg_h
com2
5
seg_g
com3
5
seg_l
com4
5
seg_m
SEG17
52
27
pin_29
function/plane
digit
segment
com1
4
seg_a
com2
4
seg_b
com3
4
seg_c
com4
4
seg_p
SEG12
57
32
pin_30
function/plane
digit
segment
com1
4
seg_h
com2
4
seg_g
com3
4
seg_l
com4
4
seg_m
SEG13
56
31
pin_31
function/plane
digit
segment
com1
3
seg_a
com2
3
seg_b
com3
3
seg_c
com4
3
seg_p
SEG8
65
40
pin_32
function/plane
digit
segment
com1
3
seg_h
com2
3
seg_g
com3
3
seg_l
com4
3
seg_m
SEG9
64
39
pin_33
function/plane
digit
segment
com1
2
seg_a
com2
2
seg_b
com3
2
seg_c
com4
2
seg_p
SEG4
70
45
pin_34
function/plane
digit
segment
com1
2
seg_h
com2
2
seg_g
com3
2
seg_l
com4
2
seg_m
SEG5
69
44
pin_35
function/plane
digit
segment
com1
1
seg_a
com2
1
seg_b
com3
1
seg_c
com4
1
seg_p
SEG0
74
49
pin_36
function/plane
digit
segment
com1
1
seg_h
com2
1
seg_g
com3
1
seg_l
com4
1
seg_m
SEG1
73
48
Font made visible