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Docs for the serial functions by Karri Kaksonen.
git-svn-id: svn://svn.cc65.org/cc65/trunk@4980 b7a2c559-68d2-44c3-8de9-860c34a00d81
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doc/funcref.sgml
267
doc/funcref.sgml
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@ -329,20 +329,21 @@ It does not declare any functions.
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<sect1><tt/serial.h/<label id="serial.h"><p>
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<!--
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The <tt/serial.h/ header file contains definitions for initializing serial
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communication.
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<itemize>
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<item><ref id="ser_load_driver" name="ser_load_driver">
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<item><ref id="ser_unload" name="ser_unload">
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<item><ref id="ser_install" name="ser_install">
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<item><ref id="ser_uninstall" name="ser_uninstall">
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<item><ref id="ser_open" name="ser_open">
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<item><ref id="ser_close" name="ser_close">
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<item><ref id="ser_get" name="ser_get">
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<item><ref id="ser_install" name="ser_install">
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<item><ref id="ser_ioctl" name="ser_ioctl">
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<item><ref id="ser_load_driver" name="ser_load_driver">
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<item><ref id="ser_open" name="ser_open">
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<item><ref id="ser_put" name="ser_put">
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<item><ref id="ser_status" name="ser_status">
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<item><ref id="ser_ioctl" name="ser_ioctl">
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<item><ref id="ser_uninstall" name="ser_uninstall">
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<item><ref id="ser_unload" name="ser_unload">
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</itemize>
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-->
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(incomplete)
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@ -4165,6 +4166,256 @@ be used in presence of a prototype.
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</quote>
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<sect1>ser_close<label id="ser_close"><p>
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<quote>
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<descrip>
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<tag/Function/Close the port and disable interrupts
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<tag/Header/<tt/<ref id="serial.h" name="serial.h">/
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<tag/Declaration/<tt/unsigned char __fastcall__ ser_close (const struct ser_params* params);/
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<tag/Description/Open the port by setting the port parameters and enable interrupts.
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<tag/Limits/<itemize>
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<item>The function is only available as fastcall function, so it may only
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be used in presence of a prototype.
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</itemize>
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<tag/Availability/cc65
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<tag/See also/Other serial functions.
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<tag/Example/
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<verb>
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#include <serial.h>
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extern char comlynx[];
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static void initialize(){
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struct ser_params params = {
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SER_BAUD_9600,
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SER_BITS_8,
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SER_STOP_1,
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SER_PAR_MARK,
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SER_HS_NONE
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};
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ser_install(&comlynx); // This will activate the ComLynx
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CLI();
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ser_open(&params);
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}
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</verb>
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</descrip>
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</quote>
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<sect1>ser_get<label id="ser_get"><p>
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<quote>
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<descrip>
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<tag/Function/Read a character from serial port.
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<tag/Header/<tt/<ref id="serial.h" name="serial.h">/
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<tag/Declaration/<tt/unsigned char __fastcall__ ser_get (char* b);/
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<tag/Description/Get a character from the serial port. If no characters are
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available, the function will return SER_ERR_NO_DATA, so this is not a fatal
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error.
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<tag/Limits/<itemize>
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<item>The function is only available as fastcall function, so it may only
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be used in presence of a prototype.
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</itemize>
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<tag/Availability/cc65
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<tag/See also/Other serial functions.
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<tag/Example/
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Wait for a character to be available from a serial port.
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<verb>
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char ch;
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while (ser_get(&ch) == SER_ERR_NO_DATA)
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;
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</verb>
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</descrip>
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</quote>
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<sect1>ser_install<label id="ser_install"><p>
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<quote>
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<descrip>
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<tag/Function/Install an already loaded driver and return an error code.
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<tag/Header/<tt/<ref id="serial.h" name="serial.h">/
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<tag/Declaration/<tt/unsigned char __fastcall__ ser_install (void* driver);/
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<tag/Description/The function installs a driver that was already loaded into
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memory (or linked statically to the program). It returns an error code
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(<tt/SER_ERR_OK/ in case of success).
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<tag/Limits/<itemize>
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<item>The function is only available as fastcall function, so it may only be
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used in presence of a prototype.
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</itemize>
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<tag/Availability/cc65
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<tag/See also/
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<ref id="ser_load_driver" name="ser_load_driver">,
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<ref id="ser_uninstall" name="ser_uninstall">,
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<ref id="ser_unload" name="ser_unload">
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<tag/Example/<verb>
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extern char lynxser[]; //Include the driver statically instead of loading it.
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ser_install(&lynxser);
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</verb>
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</descrip>
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</quote>
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<sect1>ser_ioctl<label id="ser_ioctl"><p>
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<quote>
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<descrip>
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<tag/Function/Platform dependent code extensions.
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<tag/Header/<tt/<ref id="serial.h" name="serial.h">/
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<tag/Declaration/<tt/unsigned __fastcall__ ser_ioctl (unsigned char code, void* data);/
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<tag/Description/Some platforms have extra serial functions that are not
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supported by standard serial driver functions. You can extend the driver to support
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this extra functionality bt using ser_ioctl functions.
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<tag/Limits/<itemize>
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<item>The function is only available as fastcall function, so it may only
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be used in presence of a prototype.
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<item>These functions are not easily portable to other cc65 platforms.
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</itemize>
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<tag/Availability/cc65
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<tag/See also/Other serial functions.
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<tag/Example/None
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</descrip>
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</quote>
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<sect1>ser_load_driver<label id="ser_load_driver"><p>
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<quote>
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<descrip>
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<tag/Function/Load and install a serial driver.
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<tag/Header/<tt/<ref id="serial.h" name="serial.h">/
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<tag/Declaration/<tt/void __fastcall__ ser_load_driver (const char *name);/
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<tag/Description/Load and install the driver by name.
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Will just load the driver and check if loading was successul.
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<tag/Limits/<itemize>
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<item>The function is only available as fastcall function, so it may only
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be used in presence of a prototype.
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</itemize>
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<tag/Availability/cc65
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<tag/See also/Other serial functions.
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<tag/Example/None.
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</descrip>
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</quote>
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<sect1>ser_open<label id="ser_open"><p>
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<quote>
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<descrip>
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<tag/Function/Open the port by setting the port parameters and enable interrupts
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<tag/Header/<tt/<ref id="serial.h" name="serial.h">/
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<tag/Declaration/<tt/unsigned char __fastcall__ ser_open (const struct ser_params* params);/
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<tag/Description/Open the port by setting the port parameters and enable interrupts.
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<tag/Limits/<itemize>
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<item>The function is only available as fastcall function, so it may only
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be used in presence of a prototype.
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</itemize>
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<tag/Availability/cc65
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<tag/See also/Other serial functions.
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<tag/Example/
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<verb>
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#include <serial.h>
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extern char comlynx[];
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static void initialize(){
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struct ser_params params = {
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SER_BAUD_9600,
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SER_BITS_8,
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SER_STOP_1,
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SER_PAR_MARK,
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SER_HS_NONE
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};
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ser_install(&comlynx); // This will activate the ComLynx
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CLI();
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ser_open(&params);
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}
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</verb>
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</descrip>
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</quote>
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<sect1>ser_put<label id="ser_put"><p>
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<quote>
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<descrip>
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<tag/Function/Write a character to a serial port.
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<tag/Header/<tt/<ref id="serial.h" name="serial.h">/
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<tag/Declaration/<tt/unsigned char __fastcall__ ser_put (char b);/
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<tag/Description/Send a character via the serial port. There is a transmit
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buffer, but transmitting is not done via interrupt. The function returns
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SER_ERR_OVERFLOW if there is no space left in the transmit buffer.
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<tag/Limits/<itemize>
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<item>The function is only available as fastcall function, so it may only
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be used in presence of a prototype.
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</itemize>
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<tag/Availability/cc65
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<tag/See also/Other serial functions.
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<tag/Example/
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<verb>
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ser_put('A');
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</verb>
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</descrip>
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</quote>
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<sect1>ser_status<label id="ser_status"><p>
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<quote>
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<descrip>
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<tag/Function/Return the serial port status.
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<tag/Header/<tt/<ref id="serial.h" name="serial.h">/
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<tag/Declaration/<tt/unsigned char __fastcall__ ser_put (unsigned char* status);/
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<tag/Description/Return the serial port status.
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<tag/Limits/<itemize>
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<item>The function is only available as fastcall function, so it may only
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be used in presence of a prototype.
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</itemize>
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<tag/Availability/cc65
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<tag/See also/Other serial functions.
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<tag/Example/None
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</descrip>
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</quote>
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<sect1>ser_uninstall<label id="ser_uninstall"><p>
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<quote>
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<descrip>
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<tag/Function/Uninstall the currently loaded driver but do not unload it.
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<tag/Header/<tt/<ref id="serial.h" name="serial.h">/
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<tag/Declaration/<tt/void __fastcall__ ser_uninstall (void);/
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<tag/Description/Uninstall the currently loaded driver but do not unload it.
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<tag/Limits/<itemize>
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<item>The function is only available as fastcall function, so it may only
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be used in presence of a prototype.
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</itemize>
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<tag/Availability/cc65
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<tag/See also/Other serial functions.
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<tag/Example/None.
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</descrip>
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</quote>
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<sect1>ser_unload<label id="ser_unload"><p>
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<quote>
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<descrip>
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<tag/Function/Uninstall, then unload the currently loaded driver.
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<tag/Header/<tt/<ref id="serial.h" name="serial.h">/
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<tag/Declaration/<tt/void __fastcall__ ser_unload (void);/
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<tag/Description/Uninstall, then unload the currently loaded driver.
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<tag/Limits/<itemize>
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<item>The function is only available as fastcall function, so it may only
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be used in presence of a prototype.
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</itemize>
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<tag/Availability/cc65
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<tag/See also/Other serial functions.
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<tag/Example/None.
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</descrip>
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</quote>
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<sect1>set_brk<label id="set_brk"><p>
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<quote>
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118
doc/lynx.sgml
118
doc/lynx.sgml
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@ -5,7 +5,7 @@
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<title>Atari Lynx specific information for cc65
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<author>Karri Kaksonen, <htmlurl url="mailto:karri@sipo.fi" name="karri@sipo.fi">
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Ullrich von Bassewitz, <htmlurl url="mailto:uz@cc65.org" name="uz@cc65.org">
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<date>2004-10-14
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<date>2011-04-01
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<abstract>
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An overview over the Atari Lynx runtime system as it is implemented for the
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@ -30,24 +30,111 @@ more than one platform. Please see the function reference for more
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information.
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<sect>Building you first Hello World application<p>
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Here is a small traditional Hello World program for the Atari Lynx.
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<tscreen><verb>
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#include <lynx.h>
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#include <tgi.h>
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#include <6502.h>
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extern char lynxtgi[];
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void main(void) {
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tgi_install(&lynxtgi);
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tgi_init();
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CLI();
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while (tgi_busy())
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;
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tgi_clear();
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tgi_setcolor(COLOR_GREEN);
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tgi_outtextxy(0, 0, "Hello World");
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tgi_updatedisplay();
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while (1)
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;
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}
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</verb></tscreen>
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The lynx.h contains all kind of system dependent things.
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The tgi.h contains the graphics driver functions.
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The 6502.h is needed for executing the CLI() command.
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As the Atari Lynx does not have ASCII characters available you need to use
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the Tiny Graphics Interface library for producing letters on the screen.
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The cc65 compiler suite has a graphics library called "Tiny Graphics Interface". This interface has some relocatable code. In order to use this in your own program you need to load it at run time.
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Unfortunately the Lynx does not have a disk drive from where to load it. Therefore you must already load it at compile time. The easiest way is to link it in statically.
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This relocatable driver is found in $(CC65_HOME)/tgi/lynx-160-102-16.tgi. Copy it from here.
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The name comes from 160 by 102 pixels (The Lynx LCD size), 16 colors.
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In order to link in this statically we have to make it back to a source file so that we can compile it. The next command will turn the compiled driver object file into an assembler source and compile it with the ca65 assembler.
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<tscreen><verb>
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co65 --code-label _lynxtgi lynx-160-102-16.tgi
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ca65 -t lynx lynx-160-102-16.s
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</verb></tscreen>
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This will create a linkable object file called lynx-160-102-16.o
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Then we need to compile our main file to a linkable object file.
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<tscreen><verb>
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cc65 -t lynx main.c
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ca65 -t lynx main.s
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</verb></tscreen>
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Finally we have to link them together to produce an executable cart.
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<tscreen><verb>
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cl65 -t lynx -o game.lnx main.o lynx-160-102-16.o lynx.lib
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</verb></tscreen>
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This will create a bootable cart image called game.lnx
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<sect>Binary format<p>
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The standard binary output format generated by the linker for the Lynx target
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is a cart image. It is of course possible to change this behaviour by using a
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modified startup file and linker config.
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is a cart image. By specifying the config file lynx-bll.cfg the linker will
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generate BLL download compatible binary files.
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You can also produce real carts with directory structures and encrypted
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headers by modifying the startup and linker config files. There is a simple
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example archive called <tt/lynx-cart-demo/ in the <htmlurl
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url="ftp://ftp.musoftware.de/pub/uz/cc65/contrib/" name="contrib directory">
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that shows how to create a complete bootable Lynx cart.
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It is of course possible to change this behaviour by using a modified startup
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file and linker config.
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The bootloader used in the cc65 lynx library uses a very minimal bootloader
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that does not check the cart or show a title screen.
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The advantage of this bootloader is that it allows creation of cart images to
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many common formats.
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Cart sizes
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<tscreen><verb>
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Block size Rom size Description
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512 bytes 128k Standard old games like Warbirds
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1024 bytes 256k Most common format for homebrew. Also newer games like Lemmings
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2048 bytes 512k Largest games like EOTB
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</verb></tscreen>
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<sect>Memory layout<p>
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cc65 generated programs with the default setup run with the I/O area and the
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kernal enabled, which gives a usable memory range of $400 - $C037.
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kernal enabled, which gives a usable memory range of $200 - $C037.
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Special locations:
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<tscreen><verb>
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0000 - 00FF Zero page
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0100 - 01FF Machine stack
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A058 - C037 Collision buffer
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C038 - E017 Screen buffer 1
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E018 - FFF7 Screen buffer 0
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FFF8 - FFFF Hardware vectors
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</verb></tscreen>
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<descrip>
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<tag/Text screen/
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@ -153,6 +240,9 @@ You can also enable or disable collision detection by a call to
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tgi_setcollisiondetection(active) or tgi_ioctl(5, active). The collision
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result is located before the sprite structure by default in this driver.
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In order to reserve memory for the collision detection buffer you need to
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specify lynx-coll.cfg as the configuration file to the linker.
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<sect1>Extended memory drivers<p>
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No extended memory drivers are currently available for the Lynx.
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@ -165,9 +255,6 @@ statically linked, because no file I/O is available. See the documentation for
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the <htmlurl url="co65.html" name="co65 utility"> for information on how to do
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that.
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The joystick will check to see if the screen is flipped or not in the install
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routine and adapt itself to the correct state.
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<sect1>Mouse drivers<p>
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No mouse drivers are currently available for the Lynx.
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@ -223,10 +310,7 @@ No mouse drivers are currently available for the Lynx.
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We have no handshaking available. Even software handshake is impossible
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as ComLynx has only one wire for the data.
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Both transmit and receive are interrupt driven. The driver reserves a fixed
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area $200-$2ff for the transmit ring buffer and $300-$3ff for the receive
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ring buffer. This area can not be used at startup for anything as the Lynx
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ROM needs this area for decryption purposes.
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Both transmit and receive are interrupt driven.
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</descrip><p>
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@ -235,7 +319,7 @@ No mouse drivers are currently available for the Lynx.
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<sect>Other hints<p>
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<sect>Cart access<p>
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At this point in time there is no support for the cart filesystem yet. I have
|
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a <tt/lynx-cart-demo/ example project that uses an interrupt driven display,
|
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|
|
|
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Loading…
Reference in New Issue
Block a user