参数资料
型号: IPT-C2H-NIOS
厂商: Altera
文件页数: 99/138页
文件大小: 0K
描述: C2H COMPILER FOR NIOS II
标准包装: 1
系列: Nios®II
类型: Nios II
功能: C 到硬件编译器
许可证: 初始许可证
Understanding the C2H View
Example 4–1. Vector Power Calculation
#pragma altera_accelerate connect_variable power_calculation/voltage to onchipRAM1
#pragma altera_accelerate connect_variable power_calculation/current to onchipRAM1
#pragma altera_accelerate connect_variable power_calculation/power to onchipRAM2
void power_calculation ( short * _ _restrict__ voltage,
short * _ _restrict_ _ current,
short * _ _restrict_ _ power,
short downscale,
int length)
{
int i;
for(i = 0; i < length; i++)
{
*power++ = (*voltage++ * *current++) >> downscale;
}
}
Example 4–1 requires Avalon-MM read and write master ports to
perform memory accesses. It also requires a multiplier and a barrel shifter
to perform the right shift operation. The pragma statements inform the
C2H Compiler that the input data is stored in a memory called
onchipRAM1 and the output data is to be stored in onchipRAM2 . When
the C2H Compiler compiles this function, the Nios II IDE generates a
build report as shown in Figure 4–1 .
Altera Corporation
November 2009
9.1
Nios II C2H Compiler User Guide
4–5
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