-/*-------------------------------------------------------------------------
- Include file for serial390.c. You can change some default's here.
-
- Written By - Johan Knol, johan.knol@iduna.nl
-
- This program is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; either version 2, or (at your option) any
- later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- In other words, you are welcome to use, share and improve this program.
- You are forbidden to forbid anyone else to use, share and improve
- what you give them. Help stamp out software-hoarding!
--------------------------------------------------------------------------*/
-
#ifndef SERIAL390_H
#define SERIAL390_H
-/* Here we have to decide whether or not to use interrupts for serial output.
- If your debug messages (don't we use them all :), doesn't show up
- like you expect (e.g. when you screwed up the stack or tilted the cpu
- otherwise) or if you're expecting a lot of them that might overflow
- the ring buffer, disable it. It will slow down other things you might be
- doing, but will leave serial output synchronized with that. */
-#define USE_SERIAL_INTERRUPTS 1
-
-/* Define the size of the ring buffer.
- This must be a binary number, since we shouldn't use mod (%) in
- interrupt routines */
-#define SERIAL_RECEIVE_BUFFER_SIZE 1024
-
-/* I'd rather had this calculation be done in Serial390Init(),
- but since the compiler generates e.g. _divuchar() calls
- which aren't in the library yet, we do it here. */
-#define BAUD_RATE 115200
-#define OSCILLATOR 18432000L
-#define TIMER1_RELOAD_VALUE -(OSCILLATOR/(32L*BAUD_RATE))
-
-/* there shouldn't be any reason to change anything below this line.
- If there is, please let me know */
-
-extern void Serial390Init (void);
-
-#if USE_SERIAL_INTERRUPTS
-
-/* the interrupt vector will be automaticly set when the
- main program #include-s this file */
-extern void Serial390Handler (void) interrupt 4;
-
-#endif
+#warning "Please use <tinibios.h> instead of <serial390.h>"
+#include <tinibios.h>
#endif SERIAL390_H
#VERBOSE = --verbose
-OBJECTS = startup390.rel serial390.rel memcpyx.rel
+OBJECTS = tinibios.rel memcpyx.rel
SOURCES = $(patsubst %.rel,%.c,$(OBJECTS))
+++ /dev/null
-/*-------------------------------------------------------------------------
- serial390.c - serial routines for the DS80C390 (tested on TINI)
-
- Written By - Johan Knol, johan.knol@iduna.nl
-
- This program is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; either version 2, or (at your option) any
- later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- In other words, you are welcome to use, share and improve this program.
- You are forbidden to forbid anyone else to use, share and improve
- what you give them. Help stamp out software-hoarding!
--------------------------------------------------------------------------*/
-
-// make sure that no int (16 bit) and long (32 bit) integer division,
-// multiplication & modulus operations are used unless the lib-s are
-// compiled reentrant !!!!
-
-// if you want to changed defaults, do so in serial390.h
-
-#include <stdio.h>
-#include <ds80c390.h>
-#include <serial390.h>
-
-#if USE_SERIAL_INTERRUPTS
-
-// this is a ring buffer and can overflow at anytime!
-static volatile unsigned char receiveBuffer[SERIAL_RECEIVE_BUFFER_SIZE];
-static volatile int receiveBufferHead=0;
-static volatile int receiveBufferTail=0;
-// no buffering for transmit
-static volatile char transmitIsBusy=0;
-#endif
-
-void Serial390Init (void) {
-
- ES0 = 0; // disable serial channel 0 interrupt
- TR1 = 0; // stop timer 1
-
- // set 8 bit uart with variable baud from timer 1
- // enable receiver and clear RI and TI
- SCON0 = 0x50;
-
- PCON |= 0x80; // clock is 16x bitrate
-
- TMOD = (TMOD&0x0f) | 0x20; // timer 1 is an 8bit auto-reload counter
-
- TL1 = TH1 = TIMER1_RELOAD_VALUE;
-
- TF1=0; // clear timer 1 overflow flag
- TR1=1; // start timer 1
-
-#if USE_SERIAL_INTERRUPTS
- RI_0=TI_0=0; // clear "pending" interrupts
- ES0 = 1; // enable serial channel 0 interrupt
-#else
- RI_0=0; // receive buffer empty
- TI_0=1; // transmit buffer empty
-#endif
-}
-
-#if USE_SERIAL_INTERRUPTS
-
-void Serial390Handler (void) interrupt 4 {
- if (RI_0) {
- receiveBuffer[receiveBufferHead]=SBUF0;
- //receiveBufferHead=(receiveBufferHead+1)%SERIAL_RECEIVE_BUFFER_SIZE;
- receiveBufferHead=(receiveBufferHead+1)&(SERIAL_RECEIVE_BUFFER_SIZE-1);
- if (receiveBufferHead==receiveBufferTail) /* buffer overrun, sorry :) */
- //receiveBufferTail=(receiveBufferTail+1)%SERIAL_RECEIVE_BUFFER_SIZE;
- receiveBufferTail=(receiveBufferTail+1)&(SERIAL_RECEIVE_BUFFER_SIZE-1);
- RI_0=0;
- }
- if (TI_0) {
- TI_0=0;
- transmitIsBusy=0;
- }
-}
-
-void putchar (char c)
-{
- while (transmitIsBusy)
- ;
- transmitIsBusy=1;
- SBUF0=c;
-}
-
-char getchar (void)
-{
- char c;
- while (receiveBufferHead==receiveBufferTail)
- ;
- c=receiveBuffer[receiveBufferTail];
- ES0=0; // disable serial interrupts
- //receiveBufferTail=(receiveBufferTail+1)%SERIAL_RECEIVE_BUFFER_SIZE;
- receiveBufferTail=(receiveBufferTail+1)&(SERIAL_RECEIVE_BUFFER_SIZE-1);
- ES0=1; // enable serial interrupts
- return c;
-}
-
-#else //ifdef USE_SERIALINTERRUPTS
-
-// dummy interupt handler
-void Serial390Handler (void) interrupt 4 {
- // how did we got here?
- ES0=0; // disable serial interrupts
-}
-
-void putchar (char c) {
- while (!TI_0)
- ;
- TI_0=0;
- SBUF0=c;
-}
-
-char getchar (void) {
- char c;
- while (!RI_0)
- ;
- c=SBUF0;
- RI_0=0;
- return c;
-}
-
-#endif // ifdef USE_SERIALINTERRUPTS
-
-#if 0
-static char hex[]="0123456789abcdef";
-
-void putint (unsigned int i) {
- putchar (hex[(i>>12)&0x0f]);
- putchar (hex[(i>> 8)&0x0f]);
- putchar (hex[(i>> 4)&0x0f]);
- putchar (hex[(i )&0x0f]);
-}
-
-#endif
+++ /dev/null
-#include <ds80c390.h>
-#include <serial390.h>
-
-/* This routine is intended to setup the DS80C390 in contiguous addressing
- mode, using a 10-bit stack (mapped to 0x400000).
- It assumes that _sdcc_gsinit_startup is called from a boot loader
- in 22-bit contiguous addressing mode */
-
-/* Uncomment this if you are using the tini loader 000515. Make sure
- XSEG starts at 0x100080 or it will overwrite your IVT. This won't harm
- if you are using the 990824 loader */
-#define TINI_LOADER_0515
-
-unsigned char _sdcc_external_startup(void)
-{
- IE=0; // disable ALL interrupts
-
- _asm
- ; save the 24-bit return address
- pop ar2; msb
- pop ar1
- pop ar0; lsb
-
- ; use A19..16 and !CE3..0, no CAN
- mov _TA,#0xaa; timed access
- mov _TA,#0x55
- mov _P4CNT,#0x3f
-
- ; use !PCE3..0, serial 1 at P5.2/3
- mov _TA,#0xaa; timed access
- mov _TA,#0x55
- mov _P5CNT,#0x27
-
- ; disable watchdog
- mov _EWT,#0x00
-
- ; watchdog set to 9.1 seconds
- ; timers at 1/4 xtal
- ; no strech-cycles for movx
- mov _CKCON,#0xf9;
-
- ; use internal 4k RAM as data(stack) memory at 0x400000 and
- ; move CANx memory access to 0x401000 and upwards
- ; use !CE* for program and/or data memory access
- mov _TA,#0xaa; timed access
- mov _TA,#0x55
- mov _MCON,#0xaf;
-
- mov _PMR,#0x82; two clocks per cycle
- mov _PMR,#0x92; enable multiplier
-_Startup390WaitForClock:
- mov a,_EXIF
- jnb acc.3,_Startup390WaitForClock; wait for multiplier to be ready
- mov _PMR,#0x12; one clock per cycle, xtal*2
-
- mov _TA,#0xaa; timed access
- mov _TA,#0x55
- mov _ACON,#0x06; 24-bit addresses, 10-bit stack at 0x400000
-
- mov _ESP,#0x00; reinitialize the stack
- mov _SP,#0x00
-
- ; restore the 24-bit return address
- push ar0; lsb
- push ar1
- push ar2; msb
- _endasm;
-
-#ifdef TINI_LOADER_0515
- // Copy the Interrupt Vector Table (128 bytes) from 0x10000 to 0x100000
- // Make sure that XSEG starts at 0x100080 in this case!
- _asm
- push dpx
- push dph
- push dpl
- push dps
- push b
- push acc
- mov dps,#0x00 ; make sure no autoincrement in progress
- mov dptr,#0x10000 ; from
- inc dps ; switch to alternate dptr
- mov dptr,#0x100000 ; to
- mov b,#0x80 ; count
-
-_Startup390CopyIVT:
- inc dps
- movx a,@dptr
- inc dptr
- inc dps
- movx @dptr,a
- inc dptr
- djnz b,_Startup390CopyIVT
-
- pop acc
- pop b
- pop dps
- pop dpl
- pop dph
- pop dpx
- _endasm;
-#endif
-
- // global interrupt enable, all masks cleared
- // let the Gods be with us :)
- IE = 0x80;
-
- // now that the stack is re-initialized, we can safely call
- Serial390Init();
-
- // signal _sdcc_gsinit_startup to initialize data (call _sdcc_init_data)
- return 0;
-}
-
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