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firmware/SPC: zero echo buffer to avoid artifacts

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This commit is contained in:
Maximilian Rehkopf 2012-06-10 20:09:02 +02:00
parent ae4af50dac
commit a1ca5f1dad
1 changed files with 12 additions and 0 deletions
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12
src/memory.c
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@ -361,6 +361,18 @@ uint32_t load_spc(uint8_t* filename, uint32_t spc_data_addr, uint32_t spc_header
}
FPGA_DESELECT();
file_close(); /* Done ! */
/* clear echo buffer to avoid artifacts */
uint8_t esa = sram_readbyte(spc_header_addr+0x100+0x6d);
uint8_t edl = sram_readbyte(spc_header_addr+0x100+0x7d);
uint8_t flg = sram_readbyte(spc_header_addr+0x100+0x6c);
if(!(flg & 0x20) && (edl & 0x0f)) {
int echo_start = esa << 8;
int echo_length = (edl & 0x0f) << 11;
printf("clearing echo buffer %04x-%04x...\n", echo_start, echo_start+echo_length-1);
sram_memset(spc_data_addr+echo_start, echo_length, 0);
}
return (uint32_t)filesize;
}