XC886/888CLM
Getting Started on MCAN - ADC
DAvE
XC886/888
Getting Started
V1.0
Page 1
V1.0 May 2006
DAvE Setup and Code Generation
We will use DAvE to create a project to demonstrate the feature of
interrupt, MCAN, and ADC.
ADC will be configured to the parallel conversion mode with
autoscan.
DAvE
ADC will constantly scan the analog input channel 7 (thru P2.7).
Interrupt will be generated every time the conversion is done. In
the interrupt routine, the conversion result will be transmitted thru
CAN NODE1.
CAN NODE0 is configured with Message Object 16, to be able to
received any frame in the CAN Bus. When the valid frame is
received, the interrupt will be generated. In the interrupt routine,
the received data will be send to PORT3.
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CAN NODE1 is configured with Message Object 1, to be able to
transmit a frame, which consist of 1 data byte (the result of ADC
conversion).
DAvE Setup and Code Generation
Step1: Creating the new project
File Æ New
Step2: Select 8-bit Microcontroller
DAvE
XC886CLM
and then click the “Create” button.
Step3: Inspecting General Settings
Click the “Global Setting” tab.
Select the “Enable Global Interrupt”
checkbox.
(If it is not yet selected)
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Close the interface by clicking
DAvE Setup and Code Generation
Step 4.1: Configuring ADC Module
Click “ADC” bubble.
DAvE
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On the ADC menu that appears,
Click “General” tab and do the
following:
-) In the Analog Clock Divider field:
Select “fADC / 3”
-) Select “8 bit resolution”
-) Select “Enable arbitration slot 1”
Step 4.2: Configuring ADC Module
Click “Channels” tab.
Click “Configure Channel 7” button.
New pop up window will appear.
Select “Enable Channel 7”.
Close the new pop up window by
clicking
DAvE Setup and Code Generation
DAvE
Step 4.3: Configuring ADC Module
Click “Parallel” tab.
Select the following:
“Gating line is permanently 1”
and
“Enable autoscan”
Step 4.4: Configuring ADC Module
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Click “Result Register” tab.
Select the following under the “Settings
for Result Register 0 (RCR0)”
“Enable interrupt”
and
“Reset valid flag register by read
access”
DAvE Setup and Code Generation
Step 4.5: Configuring ADC Module
Click “Functions” tab.
Select the following:
“ADC_vInit”
DAvE
Step 4.6: Configuring ADC Module
Click “Function(2)” tab.
Select the following:
“ADC_vStartParReqChNum”
Step 4.7: Configuring ADC Module
XC886/888
Click “Function(3)” tab.
Select the following:
“ADC_uwGetResultData0”
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Now, close the window by clicking
DAvE Setup and Code Generation
Step 5.1: Configuring MCAN Module
Click “Multi CAN” bubble.
DAvE
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The next few slides will show the MCAN configuration step by step from:
Configuring NODE0
Configuring NODE1
Configuring LIST
Configuring Message Object (MO) – MO1 and MO16
DAvE Setup and Code Generation
Step 5.2: Configuring MCAN NODE 0
DAvE
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On the MultiCAN menu that appears,
Click “Nodes” tab, click the “Node 0” button, and do the following:
-) Click “Control” tab and select the following options:
“Enable the Loop-Back mode (LBM)”
“Enable interrupt upon an change/set of BOFF, EWARN, LLE, LOE, or
INIT (ALIE)”
“Enable interrupt generation upon each update of the bit field LEC”
“Initialize the CAN node 0 (INIT)”
Select (ALINP):
Use MultiCAN SRN 6
Select (LECINP): Use MultiCAN SRN 6
DAvE Setup and Code Generation
Step 5.2: Configuring MCAN NODE 0 (Cont’d)
DAvE
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-) Click “Baud Rate” tab and select the following options:
“Use the module clock directly”
Enter Time Segment (TSeg1): 8
Enter Time Segment (TSeg2): 3
Enter Required baud rate:
500.000
Press Enter afterward.
-) Click “Frame Counter” tab and select the
following options:
“Frame counter mode”
“The counter is incremented each
time a frame was transmitted correctly”
Click
to close the dialog.
DAvE Setup and Code Generation
Step 5.3: Configuring MCAN NODE 1
DAvE
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On the MultiCAN menu that appears,
Click “Nodes” tab, click the “Node 1” button, and do the following:
-) Click “Control” tab and select the following options:
“Enable the Loop-Back mode (LBM)”
“Enable interrupt upon an change/set of BOFF, EWARN, LLE, LOE, or
INIT (ALIE)”
“Enable interrupt generation upon each update of the bit field LEC”
“Initialize the CAN node 1”
Select (ALINP):
Use MultiCAN SRN 7
Select (LECINP): Use MultiCAN SRN 7
DAvE Setup and Code Generation
Step 5.3: Configuring MCAN NODE 1 (Cont’d)
DAvE
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-) Click “Baud Rate” tab and select the following options:
“Use the module clock directly”
Enter Time Segment (TSeg1): 8
Enter Time Segment (TSeg2): 3
Enter Required baud rate:
500.000
Press Enter afterward.
-) Click “Frame Counter” tab and select the
following options:
“Frame counter mode”
“The counter is incremented each
time a frame was received correctly”
Click
to close the dialog.
DAvE Setup and Code Generation
Step 5.4: Configuring LIST
Click “List” tab and configure the List as follow:
Drag MO1 from the right window and put it in the first row of List 1 (Node 0).
Drag MO16 from the right window and put it in the first row of List 2 (Node 1).
DAvE
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DAvE Setup and Code Generation
Step 5.5: Configuring Message Objects
DAvE
Click on the “MOs” tab, and then click on “MO 1” button.
Configure MO 1 as follow:
Select “Enable message object 1(MSGVAL)”
Select “Transmit data frames, receive and answer remote frames”
Select Data Length: 1 data bytes
Select “Standard 11-bit identifier”
Enter Identifier 11-bit:
0x002
Select “Accept reception of standard and extended frames”
Enter Mask 11-bit:
0x000
Enter Mask 29-bit:
0x00000000
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Close the dialog by clicking
DAvE Setup and Code Generation
Step 5.5: Configuring Message Objects (Cont’d)
DAvE
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Click on “MO 16” button.
Configure MO 16 as follow:
Select “Enable message object 16(MSGVAL)”
Select “Receive data frames, transmit remote frames”
Select Data Length: 8 data bytes
Select “Standard 11-bit identifier”
Enter Identifier 11-bit:
0x000
Select “Only receive frames with matching IDE bit”
Enter Mask 11-bit:
0x000
DAvE Setup and Code Generation
Step 5.5: Configuring Message Objects (Cont’d)
Click on “Interrupt” tab.
Select “Enable receive interrupt; bit RXPND is set after successful
reception of a frame (RXIE)”
Select RXINP to: “Use CAN SRN 7”
DAvE
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Close the dialog by clicking
DAvE Setup and Code Generation
Step 5.6: Configuring SRN and interrupt
Click on the “SRNs” tab.
Select “Enable the MultiCAN service request node 7 (SRE)”
DAvE
Click on the “Interrupt” tab
Make sure to select “Level 14” into “Priority 1”
Click on the “Functions” tab.
Select “CAN_vInit” function
Click on the “Functions2” tab.
Select :
“CAN_vTransmit”
“CAN_vLoadData”
functions.
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Close the dialog by clicking
DAvE Setup and Code Generation
Step 6.1: Configuring Port Module
Click “Port” bubble.
DAvE
On the GPIO menu that appears, click
on “Configure Port3” button
Step6.2: Configuring Port Module
Select the box for P3.0 to P3.7 as
general IO
Select the “Out” for the Port Direction.
Step 6.3: Configuring Port Module
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Click “Pull Device” tab. Ensure all
fields are set to “Trisate”
Close the interface by clicking
DAvE Setup and Code Generation
Step 6.4: Configuring Port Module
On the GPIO menu, click on
“Function” tab. Select the following
checkboxes:
DAvE
“IO_vInit”
“IO_vWritePort”
Close the interface by clicking
Step 7: Generating Code and Save.
Click
code.
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button to generate the
Enter File name as “mcan_adc” to
save your project as DAvE project file
(*.dav).
DAvE Code Modification with KEIL uVision
Start the KEIL uVision by clicking the
icon
in the desktop.
DAvE
Import your DAvE project by:
Project Æ Open Project
Set the Files of types to:
Dave Project Files (*dpt)
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Select the project that you have just
generated in DAvE Setup session.
DAvE Code Modification with KEIL uVision
After the project is opened,
configure the option using:
Project Æ Option for Target
DAvE
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(To see this menu, you must
make sure that Target 1 in
the left window is selected)
Click the “Target” tab and
select the box: “Use On-chip
XRAM”
DAvE Code Modification with KEIL uVision
Select Main.C from the left window of uVision (expand the Target 1 to see
this entry) so we can modify this file.
Goto line 214 of Main.C and insert the following line:
MAIN_vInit();
DAvE
// USER CODE BEGIN (MAIN_Main,3)
// Start the Parallel Conversion of Channel 7 // Add this Line
ADC_vStartParReqChNum(0x80);
// Add this Line
// USER CODE END
Make sure that you only
add the new code
between
“USER CODE BEGIN”
and “USER CODE END”
Select SHARED_INT.C from the left window of uVision so we can modify
this file.
Goto line 188 of SHARED_INT.C and insert the following line:
void SHINT_viXINTR6Isr(void) interrupt XINTR6INT
{
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// USER CODE BEGIN (SHINT_XINTR6Isr,2)
un_32bit adcResult_old;
// Add this Line
un_32bit adcResult_new;
// Add this Line
// USER CODE END
Make sure that you only
add the new code
between
“USER CODE BEGIN”
and “USER CODE END”
DAvE Code Modification with KEIL uVision
Goto line 203 of SHARED_INT.C and insert the following line:
IRCON1 &= ~(ubyte)0x08; // clear ADCSRC0
DAvE
// USER CODE BEGIN (SHINT_XINTR6Isr,3)
// Get the ADC Result and transmit it thru CAN Node 1
adcResult_new.ubDB[3] = ADC_uwGetResultData0() & 0xFF;
if (adcResult_old.ubDB[3] != adcResult_new.ubDB[3]) {
CAN_vLoadData(0x1, &adcResult_new.ulVal);
CAN_vTransmit(0x1);
adcResult_old.ubDB[3] = adcResult_new.ubDB[3];
}
// USER CODE END
// Add this Line
// Add this Line
// Add this Line
// Add this Line
// Add this Line
// Add this Line
Make sure that
you only
add the new
code
between
“USER CODE
BEGIN”
and “USER
CODE END”
Copy the commented code from line 449-476 and paste them at line 479
between (after that, remove all of the comment “//”):
// USER CODE BEGIN (SRN7_OBJ,1)
// USER CODE END
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DAvE Code Modification with KEIL uVision
Goto line 496 of SHARED_INT.C (after un-commenting the code, you will
be able to see this line)
else
{
// The CAN controller has stored a new message into this object.
DAvE
CAN_vWriteCANAddress(CAN_MODATAL(ubTempMsgID)); // Add this line
CAN_vReadEN();
// Add this line
IO_vWritePort(P3, CAN_DATA0);
// Add this line
}
Now, compile the code by clicking the Compile icon, after that, download
and run the code.
You can rotate the Potentiometer and see the LED changing
XC886/888
Check if there is an error in the output window. You can always refer to the
project: “mcan” located at: Examples\SoftwareExample\MCAN
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CONGRATULATION !!
YOU SHOULD SEE THE LED CHANGING NOW