IPTR-C2H-NIOS Altera, IPTR-C2H-NIOS Datasheet - Page 65

• Manufacturer Part Number: IPTR-C2H-NIOS
• Description: IP CORE Renewal Of IPT-C2H-NIOS
• Manufacturer: Altera

Specifications of IPTR-C2H-NIOS

• Software Application: IP CORE, NIOS Processor And Functions
• Core Architecture: Nios II
• Features: ANSI C Compliance, Straightforward C-to-Hardware Mapping, Reporting Of Generated Results
• Core Sub-architecture: Cyclone
• Rohs Compliant: NA
• Lead Free Status / RoHS Status: na

Example 3–15. Pragma Connecting a Master Port to a Slave Port
#pragma altera_accelerate connect_variable foo/my_ptr to onchip_buffer
int foo(int *my_ptr)
{
}
Example 3–16. Pragma Connecting a Master Port to Multiple Slave Ports
#pragma altera_accelerate connect_variable foo/my_ptr to onchip_buffer_0
#pragma altera_accelerate connect_variable foo/my_ptr to ext_ram_bridge
#pragma altera_accelerate connect_variable foo/my_ptr to sdram
#pragma altera_accelerate connect_variable foo/my_ptr to \
int foo(int *my_ptr)
{
}
Altera Corporation
November 2009
int x = *my_ptr;
my_ptr[8] = 23;
int x = *my_ptr;
my_ptr[8] = 23;
Example 3–15
master ports for the variable my_ptr to the memory module named
onchip_buffer.
Example 3–16
variable's master ports to multiple slave ports.
Specifying Arbitration Shares
Arbitration shares benefit memories that have higher efficiency when
accessed sequentially, such as SDRAM. You can use arbitration shares to
reduce interruptions to sequences of transfers with a specific slave. For
example, if a master-slave connection has an arbitration share value of
ten, then the arbitrator grants at least ten consecutive transfers to the
master port when it begins a sequence of transfer requests.
The connection pragma with additional terms for arbitration share is
defined as follows, where <shares> is a positive integer from 1 to 100:
#pragma altera_accelerate connect_variable \
<function name>/<variable name> to
<module>[/<slave name>] arbitration_share <shares>
illustrates usage of the connection pragma to connect two
illustrates using multiple pragmas to connect a pointer
9.1
onchip_buffer_1/s2
C-to-Hardware Mapping Reference
Nios II C2H Compiler User Guide
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