101-1272 Rabbit Semiconductor, 101-1272 Datasheet - Page 54

• Manufacturer Part Number: 101-1272
• Description: KIT MESH NETWORK ADD-ON RCM4510W
• Manufacturer: Rabbit Semiconductor
• Type: Microprocessorr

Specifications of 101-1272

• Product: Modules
• Data Bus Width: 12 bit
• Processor Type: Rabbit 4000
• Sram: 512 KB
• Number Of I/os: 20
• Description/function: Computer Module
• Interface Type: Ethernet
• For Use With/related Products: RCM4510W
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 316-1158

5.2.4 SRAM Use
The RCM4510W module has a battery-backed data SRAM and a program-execution
SRAM. Dynamic C provides the
placed into the battery-backed SRAM. The compiler generates code that maintains two
copies of each protected variable in the battery-backed SRAM. The compiler also generates
a flag to indicate which copy of the protected variable is valid at the current time. This flag
is also stored in the battery-backed SRAM. When a protected variable is updated, the
“inactive” copy is modified, and is made “active” only when the update is 100% complete.
This assures the integrity of the data in case a reset or a power failure occurs during the
update process. At power-on the application program uses the active copy of the variable
pointed to by its associated flag.
The sample code below shows how a protected variable is defined and how its value can
be restored.
Additional information on
Manual.
5.2.5 RCM4510W Cloning
The RCM4510W does not have a pull-up resistor on the PB1 (CLKA) line of the program-
ming port. Because of this, the procedure to generate clones from the RCM4510W differs
from that used for other RabbitCore modules and single-boards computers. You must set
the
BIOSLIB\CLONECONFIG.LIB
RCM4510W master will not run the application, and further debugging is not possible as
long as the
modules will be “sterile,” meaning that they cannot be used as a master for cloning. To
develop and debug an application on an RCM4510W, comment out the
MASTER_MODE
See Technical Note TN207, Rabbit Cloning Board, for additional information on Rabbit’s
cloning board and how cloning is done.
48
CL_FORCE_MASTER_MODE
main() {
NOTE: Instead of defining this macro is your application, you may simply add the line
CL_FORCE_MASTER_MODE=1 under the Dynamic C Options > Project
Options “Defines” tab, then click OK. When you recompile your program, this will
have the same effect as setting the macro to 1 within the CLONECONFIG.LIB library.
protected int state1, state2, state3;
...
_sysIsSoftReset();
CL_FORCE_MASTER_MODE
macro or set it to 0.
protected
macro to 1 in the Dynamic C
library to use the RCM4510W as a master for cloning. An
protected
// restore any protected variables
macro is set to 1. Any cloned RCM4510W
variables is available in the Dynamic C User’s
keyword to identify variables that are to be
LIB\Rabbit4000\
RabbitCore RCM4500W
CL_FORCE_