107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
/*
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* =====================================================================================
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*
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* ________ .__ __ ________ ____ ________
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* \_____ \ __ __|__| ____ | | __\______ \ _______ _/_ |/ _____/
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* / / \ \| | \ |/ ___\| |/ / | | \_/ __ \ \/ /| / __ \
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* / \_/. \ | / \ \___| < | ` \ ___/\ / | \ |__\ \
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* \_____\ \_/____/|__|\___ >__|_ \/_______ /\___ >\_/ |___|\_____ /
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* \__> \/ \/ \/ \/ \/
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*
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* www.optixx.org
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*
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*
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* Version: 1.0
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* Created: 07/21/2009 03:32:16 PM
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* Author: david@optixx.org
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*
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* =====================================================================================
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*/
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#include <avr/io.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <avr/pgmspace.h> /* required by usbdrv.h */
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#include <util/delay.h> /* for _delay_ms() */
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#include <avr/interrupt.h> /* for sei() */
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#include "sram.h"
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#include "debug.h"
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#include "info.h"
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#define RUNCHAR 0x90
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#if 0
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uint32_t rle_decode(PGM_VOID_P in_addr, int32_t in_len, uint32_t out_addr)
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{
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uint8_t in_byte, in_repeat, last_byte;
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info_P(PSTR("RLE decode len=%li addr=0x%08lx\n"), in_len, out_addr);
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last_byte = 0;
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sram_bulk_write_start(out_addr);
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#define INBYTE(b) \
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do { \
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if ( --in_len < 0 ) { \
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return 1; \
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} \
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cli();\
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b = pgm_read_byte((PGM_VOID_P)in_addr++); \
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sei();\
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} while(0)
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#define OUTBYTE(b) \
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do { \
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sram_bulk_write(b);\
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sram_bulk_write_next();\
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out_addr++;\
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} while(0)
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INBYTE(in_byte);
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if (in_byte == RUNCHAR) {
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INBYTE(in_repeat);
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if (in_repeat != 0) {
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info_P(PSTR("Orphaned RLE code at start\n"));
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return 1;
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}
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OUTBYTE(RUNCHAR);
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} else {
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OUTBYTE(in_byte);
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}
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while (in_len > 0) {
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INBYTE(in_byte);
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if (in_len % 1024 == 0)
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info_P(PSTR("."));
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if (in_byte == RUNCHAR) {
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INBYTE(in_repeat);
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if (in_repeat == 0) {
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/*
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* Just an escaped RUNCHAR value
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*/
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OUTBYTE(RUNCHAR);
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} else {
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/*
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* Pick up value and output a sequence of it
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*/
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in_byte = last_byte; // ;out_data[-1];
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while (--in_repeat > 0)
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OUTBYTE(in_byte);
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}
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} else {
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/*
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* Normal byte
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*/
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OUTBYTE(in_byte);
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}
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last_byte = in_byte;
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}
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sram_bulk_write_end();
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info_P(PSTR("\nDone addr=0x%08lx\n"), out_addr);
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return out_addr;
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}
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#endif
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