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@@ -44,7 +44,7 @@ extern FILE uart_stdout;
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//#define FILENAME "rom.smc" //ok
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//#define FILENAME "supert.smc"
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//#define FILENAME "vortex.smc"
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-//#define FILENAME "mrdo.smc"
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+#define FILENAME "mrdo.smc"
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//#define FILENAME "spacei.smc"
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//#define FILENAME "bank01.smc" //ok
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//#define FILENAME "bank02.smc" //ok
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@@ -55,7 +55,7 @@ extern FILE uart_stdout;
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//#define FILENAME "bank07.smc" //ok
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//#define FILENAME "banklo.smc" //ok
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//#define FILENAME "bankhi.smc" //ok
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-#define FILENAME "vram2.smc" //ok
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+//#define FILENAME "vram2.smc" //ok
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#define DUMPNAME "dump256.smc"
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#define BUFFER_SIZE 512
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@@ -65,6 +65,42 @@ extern FILE uart_stdout;
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uint8_t read_buffer[BUFFER_SIZE];
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+uint16_t crc_xmodem_update (uint16_t crc, uint8_t data)
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+{
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+ int i;
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+ crc = crc ^ ((uint16_t)data << 8);
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+ for (i=0; i<8; i++)
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+ {
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+ if (crc & 0x8000)
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+ crc = (crc << 1) ^ 0x1021;
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+ else
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+ crc <<= 1;
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+ }
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+
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+ return crc;
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+}
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+
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+uint16_t do_crc(uint8_t * data,uint16_t size)
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+{
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+ uint16_t crc =0;
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+ uint16_t i;
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+ for (i=0; i<size; i++){
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+ crc = crc_xmodem_update(crc,data[i]);
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+ //printf("%x : %x\n",crc,data[i]);
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+ }
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+ return crc;
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+}
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+
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+
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+uint16_t do_crc_update(uint16_t crc,uint8_t * data,uint16_t size)
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+{
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+ uint16_t i;
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+ for (i=0; i<size; i++)
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+ crc = crc_xmodem_update(crc,data[i]);
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+ return crc;
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+}
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+
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+
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void dump_packet(uint32_t addr,uint32_t len,uint8_t *packet){
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uint16_t i,j;
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uint16_t sum = 0;
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@@ -246,9 +282,9 @@ int main(void)
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uint8_t fat_attrib = 0;
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uint32_t fat_size = 0;
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uint32_t rom_addr = 0;
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- uint32_t skip_block = 0;
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uint8_t bank_cnt = 0;
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-
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+ uint16_t crc = 0;
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+ uint16_t block_cnt;
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uart_init();
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stdout = &uart_stdout;
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@@ -258,14 +294,24 @@ int main(void)
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spi_init();
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printf("SPI Init\n");
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+#if 0
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+ uint8_t t[] = "david";
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+ printf("Test CRC %x\n",do_crc(t,5));
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+ while(1);
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+#endif
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+
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+
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#if 0
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sram_clear(0x000000, 0x80000);
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printf("sram_clear\n");
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#endif
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- //printf("read 0x0f0f\n");
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- //sram_read(0x0f0f);
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- //printf("write 0x0f0f\n");
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- //sram_write(0x0f0f,0xaa);
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+
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+#if 0
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+ printf("read 0x0f0f\n");
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+ sram_read(0x0f0f);
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+ printf("write 0x0f0f\n");
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+ sram_write(0x0f0f,0xaa);
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+#endif
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#if 0
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rom_addr = 0x4aaaa;
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@@ -291,20 +337,19 @@ int main(void)
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read_buffer) == 1) {
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- for (uint16_t block_cnt=0; block_cnt<BLOCKS; block_cnt++) {
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+ for (block_cnt=0; block_cnt<BLOCKS; block_cnt++) {
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fat_read_file (fat_cluster,read_buffer,block_cnt);
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+
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if (block_cnt && block_cnt % 64 == 0){
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- printf("Write Ram Bank: 0x%x Addr: 0x%lx Skipped: %li\n",bank_cnt,rom_addr,skip_block);
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bank_cnt++;
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- skip_block=0;
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+ printf("Write Ram Bank: 0x%x Addr: 0x%lx Block: %x CRC: %x\n",bank_cnt,rom_addr,block_cnt,crc);
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+ crc = 0;
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}
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- //if (sram_check(read_buffer,512))
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- sram_copy(rom_addr,read_buffer,512);
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- //else
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- // skip_block +=1;
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+ crc = do_crc_update(crc,read_buffer,512);
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+ sram_copy(rom_addr,read_buffer,512);
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rom_addr += 512;
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}
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- printf("Write Ram Bank: 0x%x Addr: 0x%lx Skipped: %li\n",bank_cnt,rom_addr,skip_block);
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+ printf("Write Ram Bank: 0x%x Addr: 0x%lx Block: %x CRC: %x\n",bank_cnt,rom_addr,block_cnt,crc);
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printf("Done\n");
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}
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@@ -325,6 +370,24 @@ int main(void)
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printf("\nDone 0x%lx\n",rom_addr);
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#endif
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+#if 1
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+ block_cnt = 0;
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+ crc = 0;
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+ rom_addr = 0x000000;
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+ for (block_cnt=0; block_cnt<BLOCKS; block_cnt++) {
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+ sram_read_buffer(rom_addr,read_buffer,512);
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+ if (block_cnt && block_cnt % 64 == 0){
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+ bank_cnt++;
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+ printf("Read Ram Bank: 0x%x Addr: 0x%lx Block: %x CRC: %x\n",bank_cnt,rom_addr,block_cnt,crc);
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+ crc = 0;
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+ }
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+ crc = do_crc_update(crc,read_buffer,512);
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+ rom_addr += 512;
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+ }
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+ printf("Read Ram Bank: 0x%x Addr: 0x%lx Block: %x CRC: %x\n",bank_cnt,rom_addr,block_cnt,crc);
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+#endif
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+
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+
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#if 0
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printf("Look for %s\n",DUMPNAME);
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