原创试用手记：为国产FPGA正名(二,51硬核性能测试)

 2011-5-9 16:24  5063 30 36 分类: 消费电子

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国产FPGA试用手记二（51硬核性能测试）
 
IO口速度测试，使用以下程序测试高电平脉宽。
    while(1)
    {
        P0 = 0xf;
        P0 = 0x0;
    }
 
 
同等条件下与其他MCU比较：
<table style="font-family:Arial;font-size:12px;margin:0px;" border="1" cellspacing="0" cellpadding="0"><tbody><tr><td style="font-family:Arial;font-size:12px;margin:0px;" width="225" valign="top">
单片机/处理器
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="170" valign="top">
工作频率
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="170" valign="top">
高脉冲宽度
</td>
</tr><tr><td style="font-family:Arial;font-size:12px;margin:0px;" width="225" valign="top">
ASTRO 8051硬核
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="170" valign="top">
25MHz
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="170" valign="top">
约1us
</td>
</tr><tr><td style="font-family:Arial;font-size:12px;margin:0px;" width="225" valign="top">
ASTRO 8051硬核
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="170" valign="top">
50MHz
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="170" valign="top">
约500ns
</td>
</tr><tr><td style="font-family:Arial;font-size:12px;margin:0px;" width="225" valign="top">
ASTRO 8051硬核
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="170" valign="top">
100MHz
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="170" valign="top">
约250ns
</td>
</tr><tr><td style="font-family:Arial;font-size:12px;margin:0px;" width="225" valign="top">
STC89C516
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="170" valign="top">
11.0592MHz
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="170" valign="top">
约2.16us
</td>
</tr><tr><td style="font-family:Arial;font-size:12px;margin:0px;" width="225" valign="top">
NIOS II/e 32位软核
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="170" valign="top">
25MHz
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="170" valign="top">
约2.5us
</td>
</tr><tr><td style="font-family:Arial;font-size:12px;margin:0px;" width="225" valign="top">
NIOS II/s 32位软核
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="170" valign="top">
25MHz
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="170" valign="top">
约160ns
</td>
</tr><tr><td style="font-family:Arial;font-size:12px;margin:0px;" width="225" valign="top">
NIOS II/f 32位软核
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="170" valign="top">
25MHz
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="170" valign="top">
约160ns
</td>
</tr></tbody></table> 
 
在两次操作之间插入延时函数，分别延时delay(1)、delay(2)、delay(3)、delay(4)。测试延时函数如下：
void delay(uchar cnt)
{
    uchar i =0;
    while(i < cnt)
    {
        i++;
    }
}
 
由于delay()函数调用一次会有一些额外开销（如赋初值等），所以我们通过不同延时值的实际延时差来看指令运行的速度。换句话说，对前面的程序，可以通过每次delay()函数的差值来计算每多执行一次i++和一次i
 
<table style="font-family:Arial;font-size:12px;margin:0px;" border="1" cellspacing="0" cellpadding="0"><tbody><tr><td style="font-family:Arial;font-size:12px;margin:0px;" rowspan="2" width="114" valign="top">
延时函数
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" colspan="2" width="227" valign="top">
ASTRO 8051硬核
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" colspan="2" width="227" valign="top">
NIOS II/s 32位软核
</td>
</tr><tr><td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
50MHz
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
100MHz
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
25MHz
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
50MHz
</td>
</tr><tr><td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
Delay(1)
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
5.0us
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
2.5us
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
6.5us
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
4us
</td>
</tr><tr><td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
Delay(2)
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
6.6us
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
3.3us
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
9us
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
6us
</td>
</tr><tr><td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
Delay(3)
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
8.3us
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
4.2us
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
11.5us
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
7.5us
</td>
</tr><tr><td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
Delay(4)
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
9.9us
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
5.0us
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
14us
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
9.5us
</td>
</tr><tr><td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
i++与i
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
约1.63us
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
约0.83us
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
约2.5us
</td>
<td style="font-family:Arial;font-size:12px;margin:0px;" width="114" valign="top">
约1.25us
</td>
</tr></tbody></table> 
 
特权同学曾使用相同条件测试了51单片机，通常11.0592MHz下工作的51单片机每多执行一次i++和一次i
 
 
简单的一些性能测试，发现这个51硬核还是有花头的，至于稳定性和可靠性上还需继续验证和尝试。当然，本文的测试是使用了片内的存储器作为代码和数据存储，实际速度性能和存储器的性能关系非常大，是需要进一步考核的项目。
 
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