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155 lines
6.5 KiB
HTML
155 lines
6.5 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Strict//EN">
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<html><head>
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<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
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<meta http-equiv="Content-Language" content="en-us">
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<title>Product</title><link rel="stylesheet" type="text/css" href="./style.css"></head>
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<body bgcolor="#ffffff">
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<h3><a name="over"></a>cpu</h3><p class="MsoNormal" style="font-family: Verdana;"><br></p><p style="margin-bottom: 0in;">
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</p>
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<p style="margin-bottom: 0in;">
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<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>
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</p>
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<p style="margin-bottom: 0in;">
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</p>
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<p style="margin-bottom: 0in;">
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<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>
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</p>
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<p style="margin-bottom: 0in;">
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</p>
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<p style="margin-bottom: 0in;">
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<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;">
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</p>
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<p style="margin-bottom: 0in;">
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif"><a name="read16"></a>Data = read16( address ) : reads 16-bit data from the specified address</font>
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</p>
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<p style="margin-bottom: 0in;">
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</p>
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<p style="margin-bottom: 0in;">
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<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>
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[cpu.disableinterrupts()] <font face="Bitstream Vera Sans Mono, sans-serif">cli(): disable CPU interrupts</font>
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</p>
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<p style="margin-bottom: 0in;">
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<br>
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</p>
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<p style="margin-bottom: 0in;">
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<br>
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</p>
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<p style="margin-bottom: 0in;"><a name="enableinterrupts"></a>
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[cpu.enableinterrupts()] <font face="Bitstream Vera Sans Mono, sans-serif">sei(): enable CPU interrupts</font>
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</p>
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<p style="margin-bottom: 0in;">
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<br>
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</p>
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<p style="margin-bottom: 0in;">
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif"><br>
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</font>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif"><a name="clockfrequency"></a>[cpu.clockfrequency()] Clock = clock(): returns the CPU frequency</font>
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</p>
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<p style="margin-bottom: 0in;">
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<br>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">Also, you can expose as many CPU constants (for example memory mapped registers)</font>
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</p>
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<p style="margin-bottom: 0in;">
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<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>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">CPU memory areas (as defined in the CPU header files from the CPU support </font>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">package) directly from Lua. To do this, you'll need to define the </font>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">PLATFORM_CPU_CONSTANTS macro in the platform's platform_conf.h file </font>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">(src/platform/<platform name>/platform_conf.h). Include all your constants in a </font>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">_C( <constant name> ) definition, and then build your project.</font>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">For example, let's suppose that your CPU's interrupt controler has 3 memory</font>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">mapped registers: INT_REG_ENABLE, INT_REG_DISABLE and INT_REG_MASK. If you want</font>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">to access them from Lua, locate the header that defines the values of these</font>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">registers (I'll assume its name is "cpu.h") and add these lines to the</font>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">platform_conf.h:</font>
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</p>
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<p style="margin-bottom: 0in;">
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<br>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">#include "cpu.h"</font>
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</p>
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<p style="margin-bottom: 0in;">
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<br>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">#define PLATFORM_CPU_CONSTANTS\</font>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">_C( INT_REG_ENABLE ),\</font>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">_C( INT_REG_DISABLE ),\</font>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">_C( INT_REG_MASK )</font>
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</p>
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<p style="margin-bottom: 0in;">
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<br>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">After this you'll be able to access the regs directly from Lua, like this:</font>
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</p>
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<p style="margin-bottom: 0in;">
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<br>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">data = cpu.r32( cpu.INT_REG_ENABLE )</font>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">cpu.w32( cpu.INT_REG_ENABLE, data )</font>
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</p>
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<p style="margin-bottom: 0in;">
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<br>
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</p>
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<p style="margin-bottom: 0in;">
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<font face="Bitstream Vera Sans Mono, sans-serif">For a "real-life" example, see the src/platform/lm3s/platform_conf.h file.</font>
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</p>
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<p style="margin-bottom: 0in;">
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</p>
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<p style="margin-bottom: 0in;">
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<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>
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</p>
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<p style="margin-bottom: 0in;">
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<br>
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</p>
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<p style="margin-bottom: 0in;">
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<br>
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</p>
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<p style="margin-bottom: 0in;">
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<br>
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</p>
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<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>
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