mirror of
https://github.com/elua/elua.git
synced 2025-01-25 01:02:54 +08:00
80513aaf52
SConstruct edited just to leave group/files definitions close to the platform/groups. Doc content files mirroed to pt, to ease the portuguese version initial migration
184 lines
6.6 KiB
HTML
184 lines
6.6 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Strict//EN">
|
|
<html><head>
|
|
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
|
|
<meta http-equiv="Content-Language" content="en-us"><title>Product</title>
|
|
|
|
<link rel="stylesheet" type="text/css" href="../style.css">
|
|
</head>
|
|
<body style="background-color: rgb(255, 255, 255);">
|
|
<h3><a name="over"></a>cpu</h3>
|
|
<p class="MsoNormal" style="font-family: Verdana;"><br>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"></p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif"><a name="write32"></a>write32( address, data ) : write
|
|
the 32-bit data at the specified address</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;">
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif"><a name="write16"></a>write16( address, data ) : write
|
|
the 16-bit data at the specified address</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;">
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif"><a name="write8"></a>write8( address, data ) : write the
|
|
8-bit data at the specified address</font> <br>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"><br>
|
|
</p>
|
|
<br>
|
|
<font face="Bitstream Vera Sans Mono, sans-serif"><a name="read32"></a>Data = read32( address ) :
|
|
reads 32-bit data from the specified address</font>
|
|
<p style="margin-bottom: 0in;"></p>
|
|
<p style="margin-bottom: 0in;">
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif"><a name="read16"></a>Data = read16( address ) : reads
|
|
16-bit data from the specified address</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;">
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif"><a name="read8"></a>Data = read8( address ) : reads 8-bit
|
|
data from the specified address</font></p>
|
|
<p style="margin-bottom: 0in;"><br>
|
|
</p>
|
|
<br>
|
|
<p style="margin-bottom: 0in;"><a name="disableinterrupts"></a>
|
|
[cpu.disableinterrupts()] <font face="Bitstream Vera Sans Mono, sans-serif">cli(): disable
|
|
CPU interrupts</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <br>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <br>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"><a name="enableinterrupts"></a>
|
|
[cpu.enableinterrupts()] <font face="Bitstream Vera Sans Mono, sans-serif">sei(): enable
|
|
CPU interrupts</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <br>
|
|
</p>
|
|
<p style="margin-bottom: 0in;">
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif"><br>
|
|
</font></p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif"><a name="clockfrequency"></a>[cpu.clockfrequency()]
|
|
Clock = clock(): returns the CPU frequency</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <br>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">Also, you can
|
|
expose as many CPU constants (for example memory mapped registers)</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">as you want to
|
|
this module. You might want to use this feature to access some </font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">CPU memory areas
|
|
(as defined in the CPU header files from the CPU support </font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">package)
|
|
directly from Lua. To do this, you'll need to define the </font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">PLATFORM_CPU_CONSTANTS
|
|
macro in the platform's platform_conf.h file </font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">(src/platform/<platform
|
|
name>/platform_conf.h). Include all your constants in a </font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">_C(
|
|
<constant name> ) definition, and then build your project.</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">For example,
|
|
let's suppose that your CPU's interrupt controler has 3 memory</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">mapped
|
|
registers: INT_REG_ENABLE, INT_REG_DISABLE and INT_REG_MASK. If you want</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">to access them
|
|
from Lua, locate the header that defines the values of these</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">registers (I'll
|
|
assume its name is "cpu.h") and add these lines to the</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">platform_conf.h:</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <br>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">#include "cpu.h"</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <br>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">#define
|
|
PLATFORM_CPU_CONSTANTS\</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">_C(
|
|
INT_REG_ENABLE ),\</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">_C(
|
|
INT_REG_DISABLE ),\</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">_C( INT_REG_MASK
|
|
)</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <br>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">After this
|
|
you'll be able to access the regs directly from Lua, like this:</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <br>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">data = cpu.r32(
|
|
cpu.INT_REG_ENABLE )</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">cpu.w32(
|
|
cpu.INT_REG_ENABLE, data )</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <br>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">For a
|
|
"real-life" example, see the src/platform/lm3s/platform_conf.h file.</font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;">
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <font face="Bitstream Vera Sans Mono, sans-serif">[uart.sendstring]
|
|
uart.sendstr( id, str1, str2, ... ): this is similar to "uart.send",
|
|
but its parameters are string. </font>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <br>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <br>
|
|
</p>
|
|
<p style="margin-bottom: 0in;"> <br>
|
|
</p>
|
|
<br style="font-family: Verdana;">
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
<br>
|
|
</body></html> |