mikrokontroler atmega berbasis codevision avr (serial … · teori u(s)art u(s)art = universal...
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MIKROKONTROLER ATMEGA BERBASIS
CODEVISION AVR(SERIAL U(S)ART)
D E P O K I N S T R U M E N T S dins
Teori U(S)ART
U(S)ART = Universal (Syncronous) Asyncronous Rx Txadalah standar komunikasi serial
Serial vs Parallel:
Fitur U(S)ART µC. ATmega16A
PIND.0 = RXD PORTD.1 = TXD RS232 = Protokol standar tegangan untuk komunikasi
berjarak sedang. USB TO RS232 = Konverter komunikasi USB ke RS232.
DI-Smart AVR.16 System(Sistem Plus µC. ATmega16A)
Y111059200
C1
20pFC2
20pF
R1
1K
SW1RST
VCCX1
X2RST
RST
PB0PB1PB2PB3PB4PB5PB6PB7
PA0PA1PA2PA3PA4PA5PA6PA7
PD0PD1PD2PD3PD4PD5PD6PD7 PC0
PC1PC2PC3PC4PC5PC6PC7
X1X2
12345678910
P1PORTB
12345678910
P3PORTD
12345678910
P0PORTA
12345678910
P2PORTC
VCC
VCCVCC
VCC PB0PB1PB2PB3PB4PB5PB6PB7
PA0PA1PA2PA3PA4PA5PA6PA7
PC0PC1PC2PC3PC4PC5PC6PC7R1 IN13
R2 IN8T1 IN11
T2 IN10
GN
D15
V+
2
V-
6
VCC
16
R1 OUT 12R2 OUT 9T1 OUT 14
T2 OUT 7C1+1C1 -3 C2+ 4
C2 - 5
U2
MAX232CPE
+
C91uF
+
C131uF
+
C111uF
+
C101uF
VCC
162738495
DB1SERIAL
+C4470uF
Vin1
GN
D2
+5V 3U0 LM7805CT
+ C510uF
+ C6100nF
C7100nF
VCCD14002
C3
100nf
R3
2K2L10POWER
VCC
VCC
11
23
W 2
VR1
10K
AREF
AREF
VCC
PD0PD1PD2PD3PD4PD5PD6PD7
AGND 31X113 X212
RESET9
PD2 (INT0)16
PD3 (INT1)17PD4 (OC1B)18PD5 (OC1A)19
PB0 (T0)1
PB1 (T1)2PB2 (AIN0)3PB3 (AIN1)4
PB4 (SS)5
PB5 (MOSI)6PB6 (MISO)7
PB7 (SCK)8
PA0 (ADC0) 40
PA1 (ADC1) 39PA2 (ADC2) 38PA3 (ADC3) 37
PA4 (ADC4) 36
PA5 (ADC5) 35PA6 (ADC6) 34
PA7 (ADC7) 33
PC0 22PC1 23PC2 24PC3 25PC4 26PC5 27(TOSC1) PC6 28(TOSC2) PC7 29
PD7 (OC2)21 PD6 (ICP)20
AREF 32
AVCC 30
PD1 (TDX)15 PD0 (RXD)14
IC1 AT MEGA
PB5
PB6PB7
VCC
LEDRST
1 23 45 67 89 10
P4ISP PROG
S2
PD2
S3
PD3
PD2
PD3
L8PC0
VCC
L7PC1
L6PC2
L5PC3
L4PC4
L3PC5
L2PC6
L1PC7
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
C17100nF
D0D1D2D3D4
D6D5
D7
D0
D1
D2
D3
D4
D6
D5
D7
PD0 PD1TXD SERIAL
TXD ISP
RXD SERIAL
RXD ISP
+ C121uF
123
JP1123
JP2
123456789
RP1
12
JP3LED CONNECTED
TXD ISPRXD ISP
TXD SERIAL
RXD SERIAL
POWER9-12VDC
1
2 34
56
7
8
9
DI-Smart AVR.16 System
1. ATmega16A2. Crystal3. Reset4. ISP5. Power6. Vref ADC7. RS2328. LED Array9. Push Button
1
2
34
56
8
7
9
Serial RS232
PD0=RXPD1=TX
Pemrograman U(S)ART pada CVAVR
Inisialisasi “Wizard”Aktivasi “Receiver”Aktivasi “Transmitter”Pemilihan “Baud Rate” yang akan digunakanPemilihan “Communication Parameters”“Mode” Serial
Pemrograman U(S)ART(Setup “Wizard”)
1
3
2
Inisialisasi USART sesuai dengan yang diinputkan saat Wizard.
Pemrograman U(S)ART(Inisialisasi U(S)ART Hasil “Wizard”)
Pemrograman U(S)ART(Sintaks Program U(S)ART - RX)
getchar(void); //Membaca buffer serial penerima. unsigned char char_data;
void main(void) {char_data = getchar()}
scanf(char flash *fmtstr,...); //Membaca buffer serial penerima. unsigned char char_data;
void main(void) {scanf("%d",&char_data);}
char_data = Alamat di RAM yang dialokasikan untuk menyimpan data sementara.
Pemrograman U(S)ART(Sintaks Program U(S)ART - TX)
putchar([char]); //= Put Char-Byte (0-255). putchar(‘A’); //= putchar(0x41)
putsf([string]); //= Put String on Flash. putsf(“-SELAMAT DATANG-”);
puts([*RAM]); // Lihat berikutnya. printf([char flash *fmtstr [ , arg1, arg2, ...]]); //Lihat berikutnya.
Pemrograman U(S)ART (Sintaks “sprintf”)
sprintf([char *str, char flash *fmtstr [ , arg1, arg2, ...]]); #include <stdio.h> //Library serial dan konversi karakter
unsigned char cdata=0, cstr[16];
void main(void)
{
sprintf(cstr,"Nilai Data: %04d",cdata++); puts(cstr);
}
cdata = Alamat di RAM yang dialokasikan untuk menyimpan data sementara.
cstr[16] = Alamat di RAM yang tersusun secara berurutan yang dialokasikan sebagai hasil konversi dari sintaks “sprintf”.
%d = Decimal; %x = Hexadesimal; %c = Character; %s = Strings
Pemrograman U(S)ART (Sintaks “printf”)
printf([char flash *fmtstr [ , arg1, arg2, ...]]); #include <stdio.h> //Library serial dan konversi karakter
unsigned char cdata=0, cstr[16];
void main(void)
{
Printf("Nilai Data: %04d",cdata++); }
cdata = Alamat di RAM yang dialokasikan untuk menyimpan data sementara.
cstr[16] = Alamat di RAM yang tersusun secara berurutan yang dialokasikan sebagai hasil konversi dari sintaks “sprintf”.
%d = Decimal; %x = Hexadesimal; %c = Character; %s = Strings
#include <mega16.h>
#include <stdio.h>
unsigned char char_data;
void main(void)
{
// USART initialization
// 8D-1S-NoParity; RX: On; TX: On; Async; 9600 BPS
UCSRA=0x00; UCSRB=0x18; UCSRC=0x86;
UBRRH=0x00; UBRRL=0x47;
while (1) {
char_data = getchar(); //Receive
putchar(char_data); //Transmit
}
}
Pemrograman U(S)ART (Echo)
LM35DZ adalah sensor temperatur analog ekonomis namun cukup baik dalam mengukur temperatur. Jangkauan: 0 – 100 oCSensitivitas: 10 mV/ oCOperasional: 4 – 30 V
Aplikasi U(S)ART“Data Logger Temperatur berbasis LM35DZ”
Fungsi Transfer Sensor LM35DZ
Tinjau-ulang dasar ADC:Data_ADC = (Vin/Vref)*(Maksimal_Data_Bit)Data_ADC = Hasil konversi ADC internal ATmega16AVin = Tegangan LM35Vref = Sesuai pengaturan di “Wizard” CVAVR = 5VMaksimal_Data_Bit = 10 Bit = 1023
Sensitivitas LM35 = 10 mV/ oC Temperatur terukur (T):
T = (Vin/10 mV) oC T = ((Data_ADC*5V/1023)/10 mV) oC
“Data Logger Temperatur berbasis LM35DZ” (Setup “Wizard”) [1/2]
1 2
“Data Logger Temperatur berbasis LM35DZ” (Setup “Wizard”) [2/2]
4
5
3
“Data Logger berbasis Sensor LM35DZ”(Skrip Program CVAVR) [1/3]
#include <mega16.h>
#include <delay.h>
#include <stdio.h>
#define ADC_VREF_TYPE 0x00
unsigned int read_adc(unsigned char adc_input)
{
ADMUX=adc_input | (ADC_VREF_TYPE & 0xff);
delay_us(10);
ADCSRA|=0x40;
while ((ADCSRA & 0x10)==0);
ADCSRA|=0x10;
return ADCW;
}
“Data Logger berbasis Sensor LM35DZ”(Skrip Program CVAVR) [2/3]
unsigned char T; //T = Temperatur
unsigned int idata;
float fdata; //Nilai pecahan agar perhitungan baik.
void main(void)
{
UCSRA=0x00; UCSRB=0x18; UCSRC=0x86;
UBRRH=0x00; UBRRL=0x47;
ADMUX=ADC_VREF_TYPE & 0xff; ADCSRA=0xA6; SFIOR&=0x1F;
while (1) {
idata = read_adc(0);
Printf("Data ADC: %04d",idata);
“Data Logger berbasis Sensor LM35DZ”(Skrip Program CVAVR) [3/3]
fdata = (((float)idata*5)/1023)/0.01;
T = (char)fdata;
Printf("Temperatur: %02d C",T);
delay_ms(250); }
}
E-BOOK DINS
http://depokinstruments.com/category/3-e-book/