soheil_sa
Newbie level 1
I have some problem with UART communication bettwin two AVR micro-controller,I am using Microbasci For AVR and two side code are here:
***Transmitter Side:***
***Resiver side:***
the problem is that when i send a string ("Echo Test") via UART from transmitter micro side,
I get only zero in receiver side.
The Proteus simulation is here:
**broken link removed**
and the whole side simulation and Proteus Schematic is found here:
another question is from Proteus , because i could not see any signal from VIRTUAL TERMINAL in Proteus.
Please simulate the codes to see more about codes.
Thanks a lot for your attention.
***Transmitter Side:***
Code:
program MyProject
''symbol Key0 = PORTB.0
''symbol Key1 = PORTB.1
symbol MYDELAY = delay_ms(100000)
dim uart_rd,counter,error_,error,cnt_while,error1 as byte
dim kp, cnt, oldstate,retn as byte
txt as string[7]
''module MyProject
''dim keypadPort as byte at PORTB
''dim keypadPort_Direction as byte at DDRB
' End Keypad module connections
''*************************************
''***********************************
dim LCD_RS as sbit at PORTC5_bit
''Lcdpin = Pin , Db4 = Pinc.3 , Db5 = Pinc.2 , Db6 = Pinc.1 , Db7 = Pinc.0 , Rs = Pinc.5 , E = Pinc.4
dim LCD_EN as sbit at PORTC4_bit
dim LCD_D4 as sbit at PORTC3_bit
dim LCD_D5 as sbit at PORTC2_bit
dim LCD_D6 as sbit at PORTC1_bit
dim LCD_D7 as sbit at PORTC0_bit
dim LCD_RS_Direction as sbit at DDC5_bit
dim LCD_EN_Direction as sbit at DDC4_bit
dim LCD_D4_Direction as sbit at DDC3_bit
dim LCD_D5_Direction as sbit at DDC2_bit
dim LCD_D6_Direction as sbit at DDC1_bit
dim LCD_D7_Direction as sbit at DDC0_bit
''***************************************************************ãÊÛíÑåÇ************************************************
Dim Sync As Byte '/ / Synchro Signal
Dim Raddr As Byte
Dim Ledoff As Byte
Dim Ledon As Byte
Dim Parity As Byte
Dim Code1 As Byte
Dim Code2 As Byte
Dim Code_share As Byte
Dim A1 As String [4]
Dim A2 As String [4]
'' ***********************************************************lcd1*******************************************
' End Lcd module connections
''dim error as byte
sub procedure Initialize ()
DDB0_bit = 0 ' set portd pin0 as Input pin for ufa fountain
DDB1_bit = 0 ' set portd pin0 as Input pin for ufa fountain
DDB3_bit = 0 ' set portd pin0 as Input pin for ufa fountain
DDB4_bit = 0 ' set portd pin0 as Input pin for ufa fountain
A1= "OK"
Code1 = 100
Code2 = 200
Sync = 255
Raddr = 115
Ledon = 77
Parity = Raddr + Ledon
Ledoff = 3
cnt=0
cnt_while=0
SREG_I_bit = 0 ' Interrupt disable
SREG_I_bit = 1 ' Interrupt disable
Delay_ms(100) ' Wait for UART module to stabilize
''oldstate = 0
''cnt = 0 ' Reset counter
'' Keypad_Init()
end sub
sub procedure UART_ini ()
error1 = Soft_UART_Init(PORTD,0,1,9600,0) ''// Initialize Soft UART at 9600 bps
if (error1 = 0) then '' UART Working
Lcd_Out(1,1, " UART 9600 successfull")
WordToStr(error1, txt) ' Transform counter value to string
Lcd_Out(2,6, txt)
Delay_ms(100)
else
Lcd_Out(1,1, " Fail ini UART:")
WordToStr(error1, txt) ' Transform counter value to string
Lcd_Out(2,6, txt)
Delay_ms(100)
end if
''UART1_Init(1200) ' Initialize UART module at 9600 bps
end sub
sub procedure UART_ini_simple()
UART1_Init(9600)
UART1_Init_Advanced(9600, _UART_EVENPARITY, _UART_TWO_STOPBITS)
end sub
sub procedure LCD_P1 ()
Lcd_Init() ' Initialize LCD
Lcd_Cmd(_LCD_CLEAR) ' Clear display
Lcd_Cmd(_LCD_CURSOR_OFF) ' Cursor off
LCD_Out(1,8,A1) ' Write text in first row
''LCD_Out(2,3,txt2)
end sub
sub procedure PRESSKEY1 ()
kp = 0 ' Reset key code variable
' Wait for key to be pressed and released
while ( kp = 0 )
kp = Keypad_Key_Click() ' Store key code in kp variable
wend
' Prepare value for output, transform key to it"s ASCII value
select case kp
'case 10: kp = 42 ' "*" ' Uncomment this block for keypad4x3
'case 11: kp = 48 ' "0"
'case 12: kp = 35 ' "#"
'default: kp += 48
case 1
kp = 49 ' 1 ' Uncomment this block for keypad4x4
case 2
kp = 50 ' 2
case 3
kp = 51 ' 3
case 4
kp = 65 ' A
case 5
kp = 52 ' 4
case 6
kp = 53 ' 5
case 7
kp = 54 ' 6
case 8
kp = 66 ' B
case 9
kp = 55 ' 7
case 10
kp = 56 ' 8
case 11
kp = 57 ' 9
case 12
kp = 67 ' C
case 13
kp = 42 ' *
case 14
kp = 48 ' 0
case 15
kp = 35 ' #
case 16
kp = 68 ' D
end select
if (kp <> oldstate) then ' Pressed key differs from previous
cnt = 1
oldstate = kp
else ' Pressed key is same as previous
Inc(cnt)
end if
Lcd_Chr(1, 10, kp) ' Print key ASCII value on LCD
if (cnt = 255) then ' If counter varialble overflow
cnt = 0
Lcd_Out(2, 10, " ")
end if
WordToStr(cnt, txt) ' Transform counter value to string
Lcd_Out(2, 10, txt) ' Display counter value on LCD
end sub
sub procedure PRESSKEY3 ()
oldstate = 0
retn=0 ' oldstate initial value
cnt_while=0
while cnt<> 2
if (PINB0_bit=1) then
' detect one-to-zero transition
cnt_while=1
LCD_Out(1,1,"key b0 : is pressd")
inc(cnt)
retn=cnt ' invert PORTC
oldstate = 0 ' update flag
WordToStr(cnt, txt) ' Transform counter value to string
Lcd_Out(2, 10, txt) ' Display counter value on LCD
Delay_ms(100) ' Wait for module to stabilize
end if
wend
end sub
sub procedure PRESSKEY2 ()
oldstate = 0
retn=0 ' oldstate initial value
cnt_while=0
while cnt<> 2
if Button(PINB, 0, 1, 0) then
oldstate = 1 ' update flag
end if
if (oldstate and Button(PINB, 0, 1, 1)) then ' detect one-to-zero transition
cnt_while=1
LCD_Out(1,1,"key b0 : is pressd")
inc(cnt)
retn=cnt ' invert PORTC
oldstate = 0 ' update flag
WordToStr(cnt, txt) ' Transform counter value to string
Lcd_Out(2, 10, txt) ' Display counter value on LCD
end if
wend
end sub
''dim Send_Button as sbit at PIND3_bit
''dim Send_Button_Direction as sbit at DDD3_bit
''dim rxBuff as string[16] ' Buffer string for storing data
''dim rxCnt as byte ' Counter for data writen in buffer string
''dim Received as byte ' Received data flag
' Interrupt routine
' MCU initialization
''sub procedure MCU_Init()
' Initialize global variables
'' rxCnt = 0
''Received = 0
''Send_Button_Direction = 0 ' Set PORTD.B3 pin as input
''UART1_Init(19200) ' Initialize UART module at 19200 bps
''Delay_ms(100) ' Wait for UART module to stabilize
''cd_Init() ' Initialize LCD display
''Lcd_Cmd(_LCD_CURSOR_OFF) ' Cursor off
''Lcd_Cmd(_LCD_CLEAR) ' Clear display
''RXCIE_bit = 1 ' Turn ON interrupt on UART1 receive
''SREG_I_bit = 1 ' Enable Interrupts
''''end sub
sub procedure Uart_send()
cnt=0
error=0
'' error = Soft_UART_Init(PORTD, 0, 1, 9600, 0)
'' error_ = Soft_UART_Init(PORTD,0,1,9600,0) ' Initialize Soft UART at 14400 bps
if (error > 0) then
''PORTB = error_ ' Signalize Init error
while TRUE
Lcd_Cmd(_LCD_CLEAR) ' Clear display
Lcd_Cmd(_LCD_CURSOR_OFF)
Lcd_Out(2,1,"Error=")
Lcd_Out(2, 3, txt)
Delay_ms(100) ' Stop program
wend
end if
Delay_ms(100)
Lcd_Cmd(_LCD_CLEAR) ' Clear display
Lcd_Cmd(_LCD_CURSOR_OFF)
Lcd_Out(1,1,"Waiting For UART")
Lcd_Out(2,1,"To Be Pressed")
Delay_ms(100)
while TRUE
WordToStr(error, txt)
'' if(Button(PINB, 1, 1, 0)) then ' If PORTD.B1 is pressed :
if (PINB1_bit=0) then
LCD_P1 ()
Lcd_Cmd(_LCD_CLEAR) ' Clear display
Lcd_Cmd(_LCD_CURSOR_OFF)
Lcd_Out(2,1,"Er:")
Lcd_Out(2, 3, txt)
Delay_ms(100)
Lcd_Cmd(_LCD_CLEAR)
inc(cnt)
retn=cnt ' invert PORTC
WordToStr(cnt, txt) ' Transform counter value to string
Lcd_Out(2, 11, txt) Delay_ms(250)
retn = 255
''UART1_Write(cnt)
UART1_Write_Text("EchoTest") txt="EchoTest" ' send text string
''UART1_Write_Text(txt)
Delay_ms(250) ' wait for 250ms
if (UART_Tx_Idle() <> 0) then
''WordToStr(retn, txt)
Lcd_Out(1,1,"send Done:")
Lcd_Out(2, 1, txt)
''UART1_Write($AA)
Delay_ms(250) ' wait for 250ms
end if
end if
wend
end sub
sub procedure Uart_send2()
while TRUE
if(Button(PINB, 1, 1, 1)) then ' If PORTD.B3 is pressed :
LCD_P1 ()
inc(cnt)
retn=cnt ' invert PORTC
WordToStr(cnt, txt) ' Transform counter value to string
Lcd_Out(2, 10, txt)
error_ = Soft_UART_Init(PORTD,0,1,9600,0) ' Initialize Soft UART at 14400 bps
if (error_ > 0) then
PORTB = error_ ' Signalize Init error
while TRUE
Lcd_Out(2, 10, "Erorre")
nop ' Stop program
wend
end if
Delay_ms(100)
for counter = "z" to "A" step -1 ' Send bytes from 'z' downto 'A'
Soft_UART_Write(counter)
Lcd_Out(2,1,"Uart:")
WordToStr(counter, txt)
Lcd_Out(2,7,txt)
Delay_ms(100)
next counter
end if
wend
end sub
main:
''MCU_Init() ' Initialize the MCU
''Lcd_Out(1, 1, "tRFclick example") ' Display starting message on the Lcd
' Initialize Software UART communication on pins Rx, Tx, at 14400 bps
'' error = Soft_UART_Init(PORTB, 1, 2, 9600, 0)
'' while TRUE
''if(Button(PIND, 3, 1, 1)) then ' If PORTD.B3 is pressed :
'' UART1_Write_Text("EchoTest") ' send text string
'' UART1_Write(13)
''Delay_ms(250) ' wait for 250ms
''end if
'' if(Received) then ' If data is received via UART :
''Lcd_cmd(_LCD_SECOND_ROW) ' set cursor in the second row
''Lcd_Out(2, 1, " ") ' clear second row
''Lcd_Out(2, 1, rxBuff) ' display the received data in the second row
'' Received = 0 ' clear received data flag
'' end if
'' wend
Lcd_Init() ' Initialize LCD
Lcd_Cmd(_LCD_CLEAR) ' Clear display
Lcd_Cmd(_LCD_CURSOR_OFF) ' Cursor off
Initialize ()
''UART_ini ()
UART_ini_simple()
while TRUE
''MYDELAY
''oldstate = 0
''cnt = 0
''oldstate = 0
''cnt = 0 ' Reset counter
''Keypad_Init() ' Initialize Keypad
LCD_P1 ()
PRESSKEY3 ()
''UART1_Init(19200) ' Initialize UART module at 9600 bps
Delay_ms(100) ' Wait for UART module to stabilize
Uart_send()
''while TRUE ' Endless loop
'' if (UART1_Data_Ready() <> 0) then ' If data is received,
'' uart_rd = UART1_Read() ' read the received data,
'' UART1_Write(uart_rd) ' and send data via UART
'' end if
'' wend
wend
end.***Resiver side:***
Code:
program resiver
''symbol Key0 = PORTB.0
''symbol Key1 = PORTB.1
symbol MYDELAY = delay_ms(100000)
dim uart_rd,counter,error_,receive,error,error1,data1 ,error2_ as byte
dim kp, cnt, oldstate,retn as byte
txt as string[7]
txt2 as string[7]
txt_inin as string[7]
''module MyProject
''dim keypadPort as byte at PORTB
''dim keypadPort_Direction as byte at DDRB
' End Keypad module connections
''*************************************
''***********************************
dim LCD_RS as sbit at PORTC5_bit
''Lcdpin = Pin , Db4 = Pinc.3 , Db5 = Pinc.2 , Db6 = Pinc.1 , Db7 = Pinc.0 , Rs = Pinc.5 , E = Pinc.4
dim LCD_EN as sbit at PORTC4_bit
dim LCD_D4 as sbit at PORTC3_bit
dim LCD_D5 as sbit at PORTC2_bit
dim LCD_D6 as sbit at PORTC1_bit
dim LCD_D7 as sbit at PORTC0_bit
dim LCD_RS_Direction as sbit at DDC5_bit
dim LCD_EN_Direction as sbit at DDC4_bit
dim LCD_D4_Direction as sbit at DDC3_bit
dim LCD_D5_Direction as sbit at DDC2_bit
dim LCD_D6_Direction as sbit at DDC1_bit
dim LCD_D7_Direction as sbit at DDC0_bit
''***************************************************************ãÊÛíÑåÇ************************************************
Dim Sync As Byte '/ / Synchro Signal
Dim Raddr As Byte
Dim Ledoff As Byte
Dim Ledon As Byte
Dim Parity As Byte
Dim Code1 As Byte
Dim Code2 As Byte
Dim Code_share As Byte
Dim A1 As String [4]
Dim output As String [4]
'' ***********************************************************lcd1*******************************************
' End Lcd module connections
''dim error as byte
sub procedure Initialize ()
DDB0_bit = 0 ' set portd pin0 as Input pin for ufa fountain
DDB1_bit = 0 ' set portd pin0 as Input pin for ufa fountain
DDB3_bit = 0 ' set portd pin0 as Input pin for ufa fountain
DDB4_bit = 0 ' set portd pin0 as Input pin for ufa fountain
A1= "OK"
Code1 = 100
Code2 = 200
Sync = 255
Raddr = 115
Ledon = 77
Parity = Raddr + Ledon
Ledoff = 3
cnt=0
Delay_ms(100)
LCD_Out(1,8,A1) ' Wait for UART module to stabilize
'' error = Soft_UART_Init(PORTD, 0, 1, 9600, 0)
''oldstate = 0
''cnt = 0 ' Reset counter
'' Keypad_Init()
end sub
sub procedure UART_ini ()
error1 = Soft_UART_Init(PORTD,0,1,9600,0) ''// Initialize Soft UART at 9600 bps
if (error1 = 0) then '' UART Working
Lcd_Out(1,1, " UART 9600 successfull ")
WordToStr(error1, txt_inin) ' Transform counter value to string
Lcd_Out(2,6, txt_inin)
Delay_ms(1100)
else
Lcd_Out(1,1, " Fail ini UART:")
WordToStr(error1, txt) ' Transform counter value to string
Lcd_Out(2,6, txt)
Delay_ms(1100)
end if
''UART1_Init(1200) ' Initialize UART module at 9600 bps
end sub
sub procedure UART_ini_simple()
UART1_Init(9600)
UART1_Init_Advanced(9600, _UART_EVENPARITY, _UART_TWO_STOPBITS)
end sub
sub procedure LCD_P1 ()
Lcd_Init() ' Initialize LCD
Lcd_Cmd(_LCD_CLEAR) ' Clear display
Lcd_Cmd(_LCD_CURSOR_OFF) ' Cursor off
LCD_Out(1,8,A1) ' Write text in first row
''LCD_Out(2,3,txt2)
end sub
sub procedure PRESSKEY1 ()
kp = 0 ' Reset key code variable
' Wait for key to be pressed and released
while ( kp = 0 )
kp = Keypad_Key_Click() ' Store key code in kp variable
wend
' Prepare value for output, transform key to it"s ASCII value
select case kp
'case 10: kp = 42 ' "*" ' Uncomment this block for keypad4x3
'case 11: kp = 48 ' "0"
'case 12: kp = 35 ' "#"
'default: kp += 48
case 1
kp = 49 ' 1 ' Uncomment this block for keypad4x4
case 2
kp = 50 ' 2
case 3
kp = 51 ' 3
case 4
kp = 65 ' A
case 5
kp = 52 ' 4
case 6
kp = 53 ' 5
case 7
kp = 54 ' 6
case 8
kp = 66 ' B
case 9
kp = 55 ' 7
case 10
kp = 56 ' 8
case 11
kp = 57 ' 9
case 12
kp = 67 ' C
case 13
kp = 42 ' *
case 14
kp = 48 ' 0
case 15
kp = 35 ' #
case 16
kp = 68 ' D
end select
if (kp <> oldstate) then ' Pressed key differs from previous
cnt = 1
oldstate = kp
else ' Pressed key is same as previous
Inc(cnt)
end if
Lcd_Chr(1, 10, kp) ' Print key ASCII value on LCD
if (cnt = 255) then ' If counter varialble overflow
cnt = 0
Lcd_Out(2, 10, " ")
end if
WordToStr(cnt, txt) ' Transform counter value to string
Lcd_Out(2, 10, txt) ' Display counter value on LCD
end sub
sub procedure PRESSKEY2 ()
oldstate = 0
retn=0 ' oldstate initial value
while retn <> 3
if (Button(PINB, 0, 1, 1) <> 0) then ' detect logical one
oldstate = 1 ' update flag
end if
if (oldstate and Button(PINB, 0, 1, 0)) then ' detect one-to-zero transition
LCD_Out(1,1,"key b0 : is pressd")
inc(cnt)
retn=cnt ' invert PORTC
oldstate = 0 ' update flag
WordToStr(cnt, txt) ' Transform counter value to string
Lcd_Out(2, 10, txt) ' Display counter value on LCD
end if
wend
end sub
''dim Send_Button as sbit at PIND3_bit
''dim Send_Button_Direction as sbit at DDD3_bit
''dim rxBuff as string[16] ' Buffer string for storing data
''dim rxCnt as byte ' Counter for data writen in buffer string
''dim Received as byte ' Received data flag
' Interrupt routine
' MCU initialization
''sub procedure MCU_Init()
' Initialize global variables
'' rxCnt = 0
''Received = 0
''Send_Button_Direction = 0 ' Set PORTD.B3 pin as input
''UART1_Init(19200) ' Initialize UART module at 19200 bps
''Delay_ms(100) ' Wait for UART module to stabilize
''cd_Init() ' Initialize LCD display
''Lcd_Cmd(_LCD_CURSOR_OFF) ' Cursor off
''Lcd_Cmd(_LCD_CLEAR) ' Clear display
''RXCIE_bit = 1 ' Turn ON interrupt on UART1 receive
''SREG_I_bit = 1 ' Enable Interrupts
''''end sub
sub procedure UART_Read_simple()
error = 1
do
error = Soft_UART_Init(PORTD, 0, 1, 9600, 0)
receive = Soft_UART_Read(error)
Lcd_Out(1, 1, "UART recived:")
WordToStr(receive, txt2)
UART_Write(receive)
Lcd_Out(2, 3, txt2)
inc(cnt)
retn=cnt ' invert PORTC
WordToStr(cnt, txt) ' Transform counter value to string
Lcd_Out(2, 10, txt)
Delay_ms(100)
loop until error = 0
end sub
sub procedure Uart_res()
cnt=0
error=0
while TRUE
''Lcd_Out(1, 1, "urt_first")
if (UART_Data_Ready() <> 0)then ' if data is received
receive = UART1_Read()
Lcd_Out(1, 1, "UART recived:")
WordToStr(receive, txt2)
UART_Write(receive)
Lcd_Out(2, 3, txt2)
inc(cnt)
retn=cnt ' invert PORTC
WordToStr(cnt, txt) ' Transform counter value to string
Lcd_Out(2, 10, txt)
Delay_ms(100)
retn = 0x1E
'' UART_Read_Text(output, "OK", 10) ' reads text until 'OK' is found
''UART_Write_Text(output) ' sends back text
end if
' wait for 250ms
wend
end sub
sub procedure Uart_Read_low()
if (UART1_Data_Ready() <> 0) then ' If data is received,
uart_rd = UART1_Read() ' read the received data,
end if
end sub
sub procedure Uart_send2()
while TRUE
if(Button(PINB, 1, 1, 1)) then ' If PORTD.B3 is pressed :
LCD_P1 ()
inc(cnt)
retn=cnt ' invert PORTC
WordToStr(cnt, txt) ' Transform counter value to string
Lcd_Out(2, 10, txt)
''error_ = Soft_UART_Init(PORTD,0,1,1200,0) ' Initialize Soft UART at 14400 bps
if (error_ > 0) then
PORTB = error_ ' Signalize Init error
while TRUE
Lcd_Out(2, 10, "Erorre")
Delay_ms(1100)
nop ' Stop program
wend
end if
Delay_ms(100)
for counter = "z" to "A" step -1 ' Send bytes from 'z' downto 'A'
Soft_UART_Write(counter)
Delay_ms(100)
next counter
end if
wend
end sub
main:
''MCU_Init() ' Initialize the MCU
''Lcd_Out(1, 1, "tRFclick example") ' Display starting message on the Lcd
' Initialize Software UART communication on pins Rx, Tx, at 14400 bps
'' error = Soft_UART_Init(PORTD, 0, 1, 9600, 0)
'' while TRUE
''if(Button(PIND, 3, 1, 1)) then ' If PORTD.B3 is pressed :
'' UART1_Write_Text("EchoTest") ' send text string ' if data is received
''Delay_ms(250) ' wait for 250ms
''end if
'' if(Received) then ' If data is received via UART :
''Lcd_cmd(_LCD_SECOND_ROW) ' set cursor in the second row
''Lcd_Out(2, 1, " ") ' clear second row
''Lcd_Out(2, 1, rxBuff) ' display the received data in the second row
'' Received = 0 ' clear received data flag
'' end if
'' wend
Lcd_Init() ' Initialize LCD
Lcd_Cmd(_LCD_CLEAR) ' Clear display
Lcd_Cmd(_LCD_CURSOR_OFF) ' Cursor off
Initialize ()
''UART_ini ()
UART_ini_simple()
' try Soft_UART_Read with blocking prevention mechanism
while TRUE
LCD_P1 ()
UART_Read_simple()
''Uart_res()
wend
end.
' Declarations sectionI get only zero in receiver side.
The Proteus simulation is here:
**broken link removed**
and the whole side simulation and Proteus Schematic is found here:
another question is from Proteus , because i could not see any signal from VIRTUAL TERMINAL in Proteus.
Please simulate the codes to see more about codes.
Thanks a lot for your attention.
Last edited by a moderator: