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Allow serial port options to be specified in a relatively friendly format.

pull/1/head
Michael Brown 2005-04-17 16:15:46 +00:00
parent 6ca5e85a3b
commit 64e1df4af6
2 changed files with 24 additions and 14 deletions
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2
src/config.h
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@ -28,7 +28,7 @@
#if ! COMPRESERVE #if ! COMPRESERVE
#define COMSPEED 9600 /* Baud rate */ #define COMSPEED 9600 /* Baud rate */
#define COMDATA 8 /* Data bits */ #define COMDATA 8 /* Data bits */
#define COMPARITY N /* Parity */ #define COMPARITY 0 /* Parity: 0=None, 1=Odd, 2=Even */
#define COMSTOP 1 /* Stop bits */ #define COMSTOP 1 /* Stop bits */
#endif #endif

36
src/core/serial.c
View File

@ -16,22 +16,35 @@
#include "init.h" #include "init.h"
#include "io.h" #include "io.h"
#include "timer.h" #include "timer.h"
#include "config/serial.h"
/* Set default values if none specified */ /* Set default values if none specified */
#ifndef COMCONSOLE #ifndef COMCONSOLE
#define COMCONSOLE ( 0x3f8 ) #define COMCONSOLE 0x3f8
#endif #endif
#ifndef CONSPEED #ifndef COMSPEED
#define CONSPEED ( 9600 ) #define COMSPEED 9600
#endif
#ifndef COMDATA
#define COMDATA 8
#endif
#ifndef COMPARITY
#define COMPARITY N
#endif
#ifndef COMSTOP
#define COMSTOP 1
#endif #endif
#undef UART_BASE #undef UART_BASE
#define UART_BASE COMCONSOLE #define UART_BASE ( COMCONSOLE )
#undef UART_BAUD #undef UART_BAUD
#define UART_BAUD CONSPEED #define UART_BAUD ( COMSPEED )
#if ((115200%UART_BAUD) != 0) #if ((115200%UART_BAUD) != 0)
#error Bad ttys0 baud rate #error Bad ttys0 baud rate
@ -40,12 +53,9 @@
#define COMBRD (115200/UART_BAUD) #define COMBRD (115200/UART_BAUD)
/* Line Control Settings */ /* Line Control Settings */
#ifndef COMPARM #define UART_LCS ( ( ( (COMDATA) - 5 ) << 0 ) | \
/* Set 8bit, 1 stop bit, no parity */ ( ( (COMPARITY) ) << 3 ) | \
#define COMPARM 0x03 ( ( (COMSTOP) - 1 ) << 2 ) )
#endif
#define UART_LCS COMPARM
/* Data */ /* Data */
#define UART_RBR 0x00 #define UART_RBR 0x00
@ -133,7 +143,7 @@ static int serial_ischar ( void ) {
/* /*
* int serial_init(void); * int serial_init(void);
* Initialize port UART_BASE to speed CONSPEED, line settings 8N1. * Initialize port UART_BASE to speed COMSPEED, line settings 8N1.
*/ */
static void serial_init ( void ) { static void serial_init ( void ) {
int status; int status;
@ -150,7 +160,7 @@ static void serial_init ( void ) {
uart_writeb(lcs, UART_BASE + UART_LCR); uart_writeb(lcs, UART_BASE + UART_LCR);
#endif #endif
/* Set Baud Rate Divisor to CONSPEED, and test to see if the /* Set Baud Rate Divisor to COMSPEED, and test to see if the
* serial port appears to be present. * serial port appears to be present.
*/ */
uart_writeb(0x80 | lcs, UART_BASE + UART_LCR); uart_writeb(0x80 | lcs, UART_BASE + UART_LCR);