Waylon Cude
fe227d1b61
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How tf did it break bro
137 lines
6.9 KiB
Plaintext
137 lines
6.9 KiB
Plaintext
digraph sd_controller {
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// Rough steps
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INIT [shape=doublecircle, label="INIT\ncounter=80\nclk_source=slow"];
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node [shape=ellipse]
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// Tick at slow speed (100khz? 400khz?) for 80 ticks
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WAIT [label="WAIT\ncounter--"];
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// Send CMD0 with arg 0
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SEND_CMD0 [label="SEND_CMD0\ncmd=0\narg=0\nstart=1"];
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// There is no response to CMD0, so tick for 20 more cycles then send CMD8
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WAIT_CMD0 [label="WAIT_CMD0\ncounter=20\nstart=0"];
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DELAY_CMD0 [label="DELAY_CMD0\ncounter--"];
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// Send CMD8
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SEND_CMD8 [label="SEND_CMD8\ncmd=8\narg=0x1AA\nstart=1"];
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WAIT_CMD8 [label="WAIT_CMD8\nstart=0"];
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LISTEN_RESPONSE_CMD8 [label="LISTEN_RESPONSE_CMD8\nresponse_type=7\nread_command.listen=1"]
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WAIT_RESPONSE_CMD8 [label="WAIT_RESPONSE_CMD8\nread_command.listen=0"];
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INIT -> WAIT;
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WAIT -> WAIT [label="counter!=0"];
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WAIT -> SEND_CMD0 [label="counter==0"];
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SEND_CMD0 -> WAIT_CMD0;
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WAIT_CMD0 -> DELAY_CMD0 [label="send_command.ready"];
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WAIT_CMD0 -> WAIT_CMD0 [label="!send_command.ready"]
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DELAY_CMD0 -> DELAY_CMD0 [label="counter!=0"];
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DELAY_CMD0 -> SEND_CMD8 [label="counter==0"]
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SEND_CMD8 -> WAIT_CMD8;
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WAIT_CMD8 -> WAIT_CMD8 [label="!send_command.ready"]
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WAIT_CMD8 -> LISTEN_RESPONSE_CMD8 [label="send_command.ready"]
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LISTEN_RESPONSE_CMD8 -> WAIT_RESPONSE_CMD8;
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WAIT_RESPONSE_CMD8 -> WAIT_RESPONSE_CMD8 [label="!read_command.received"]
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// Send CMD55+CMD41 with arg 40100000 until card is ready
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SEND_CMD55 [label="SEND_CMD55\ncmd=55\narg=0\nstart=1"];
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WAIT_CMD55 [label="WAIT_CMD55\nstart=0"];
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LISTEN_RESPONSE_CMD55 [label="LISTEN_RESPONSE_CMD55\nresponse_type=1\nread_command.listen=1"]
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WAIT_RESPONSE_CMD55 [label="WAIT_RESPONSE_CMD55\nread_command.listen=0"]
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SEND_ACMD41 [label="SEND_ACMD41\ncmd=41\narg=0x40100000\nstart=1"];
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WAIT_ACMD41 [label="WAIT_ACMD41\nstart=0"];
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LISTEN_RESPONSE_ACMD41 [label="LISTEN_RESPONSE_ACMD41\nresponse_type=3\nread_command.listen=1"]
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WAIT_RESPONSE_ACMD41 [label="WAIT_RESPONSE_ACMD41\nread_command.listen=0\ncounter=100"];
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// Delay trying this again
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ACMD41_DELAY [label="ACMD41_DELAY\ncounter--"];
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// Card is ready when bit31 is high
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WAIT_RESPONSE_CMD8 -> SEND_CMD55 [label="read_command.received"]
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SEND_CMD55 -> WAIT_CMD55;
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WAIT_CMD55 -> WAIT_CMD55 [label="!send_command.ready"];
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WAIT_CMD55 -> LISTEN_RESPONSE_CMD55 [label="send_command.ready"];
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LISTEN_RESPONSE_CMD55 -> WAIT_RESPONSE_CMD55;
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WAIT_RESPONSE_CMD55 -> WAIT_RESPONSE_CMD55 [label="!read_command.received"]
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WAIT_RESPONSE_CMD55 -> SEND_ACMD41 [label="read_command.received"]
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SEND_ACMD41 -> WAIT_ACMD41
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WAIT_ACMD41 -> WAIT_ACMD41 [label="!send_command.ready"]
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WAIT_ACMD41 -> LISTEN_RESPONSE_ACMD41[label="send_command.ready"]
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LISTEN_RESPONSE_ACMD41 -> WAIT_RESPONSE_ACMD41
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WAIT_RESPONSE_ACMD41 -> WAIT_RESPONSE_ACMD41 [label="!read_command.received"]
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WAIT_RESPONSE_ACMD41 -> ACMD41_DELAY [label="read_command.received && !out_data[39]"]
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ACMD41_DELAY -> ACMD41_DELAY [label="counter!=0"]
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ACMD41_DELAY -> SEND_CMD55 [label="counter==0"]
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// CMD2 with argument 0, dont need response
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SEND_CMD2 [label="SEND_CMD2\ncmd=2\narg=0\nsend_command.start=1"];
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WAIT_CMD2 [label="WAIT_CMD2\nsend_command.start=0"];
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LISTEN_RESPONSE_CMD2 [label="LISTEN_RESPONSE_CMD2\nresponse_type=2\nread_command.listen=1"];
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WAIT_RESPONSE_CMD2 [label="WAIT_RESPONSE_CMD2\nread_command.listen=0"];
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WAIT_RESPONSE_ACMD41 -> SEND_CMD2 [label="read_command.received && out_data[39]"]
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SEND_CMD2 -> WAIT_CMD2;
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WAIT_CMD2 -> WAIT_CMD2 [label="!send_command.ready"]
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WAIT_CMD2 -> LISTEN_RESPONSE_CMD2 [label="send_command.ready"]
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LISTEN_RESPONSE_CMD2 -> WAIT_RESPONSE_CMD2;
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WAIT_RESPONSE_CMD2 -> WAIT_RESPONSE_CMD2 [label="!read_command.received"]
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// CMD3 with argument 0 to get RCA
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SEND_CMD3 [label="SEND_CMD3\ncmd=3\narg=0\nsend_command.start=1"];
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WAIT_CMD3 [label="WAIT_CMD3\nsend_command.start=0"];
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LISTEN_RESPONSE_CMD3 [label="LISTEN_RESPONSE_CMD3\nresponse_type=6\nread_command.listen=1"];
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WAIT_RESPONSE_CMD3 [label="WAIT_RESPONSE_CMD3\nread_command.listen=0"];
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WAIT_RESPONSE_CMD2 -> SEND_CMD3 [label="read_command.received"]
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SEND_CMD3 -> WAIT_CMD3
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WAIT_CMD3 -> WAIT_CMD3 [label="!send_command.ready"]
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WAIT_CMD3 -> LISTEN_RESPONSE_CMD3 [label="send_command.ready"]
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LISTEN_RESPONSE_CMD3 -> WAIT_RESPONSE_CMD3;
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WAIT_RESPONSE_CMD3 -> WAIT_RESPONSE_CMD3 [label="!read_command.received"]
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// CMD7 to select the correct card given the RCA
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SEND_CMD7 [label="SEND_CMD7\ncmd=7\narg={out_data[39:24],16'h0000}\nsend_command.start=1"];
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WAIT_CMD7 [label="WAIT_CMD7\nsend_command.start=0"];
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LISTEN_RESPONSE_CMD7 [label="LISTEN_RESPONSE_CMD7\nresponse_type=1\nread_command.listen=1"];
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WAIT_RESPONSE_CMD7 [label="WAIT_RESPONSE_CMD7\nread_command.listen=0"];
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WAIT_RESPONSE_CMD3 -> SEND_CMD7[label="read_command.received"]
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SEND_CMD7 -> WAIT_CMD7;
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WAIT_CMD7 -> WAIT_CMD7 [label="!send_command.ready"]
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WAIT_CMD7 -> LISTEN_RESPONSE_CMD7 [label="send_command.ready"]
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LISTEN_RESPONSE_CMD7 -> WAIT_RESPONSE_CMD7;
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WAIT_RESPONSE_CMD7 -> WAIT_RESPONSE_CMD7 [label="!read_command.ready"]
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// Now we can finally read blocks with CMD17
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// Swap over to the fast clock
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READY_TO_TRANSMIT [label="READY_TO_TRANSMIT\nclk_source=fast\naddress=0\nbuffer_half=0"];
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// There are two sets of states because we need to read two blocks at once
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TRANSMIT [label="TRANSMIT\ncmd=17\narg=address\nsend_command.start=1"];
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WAIT_TRANSMIT [label="WAIT_TRANSMIT\nsend_command.start=0\ncounter=4114"];
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WAIT_END [label="WAIT_END\ncounter--"];
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FINISH_TRANSMIT [label="FINISH_TRANSMIT\naddress++"]
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TRANSMIT2 [label="TRANSMIT2\ncmd=17\narg=address\nsend_command.start=1"];
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WAIT_TRANSMIT2 [label="WAIT_TRANSMIT2\nsend_command.start=0\ncounter=4114"];
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WAIT_END2 [label="WAIT_END2\ncounter--"];
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FINISH_TRANSMIT2 [label="FINISH_TRANSMIT2\naddress++\nsd_buffer_half=!sd_buffer_half"]
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// Wait for the buffer to be free, then go back to TRANSMIT
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WAIT_FOR_BUFFER [label="WAIT_FOR_BUFFER\nready=1"];
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WAIT_RESPONSE_CMD7 -> READY_TO_TRANSMIT [label="read_command.ready"]
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READY_TO_TRANSMIT -> TRANSMIT;
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TRANSMIT -> WAIT_TRANSMIT;
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WAIT_TRANSMIT -> WAIT_TRANSMIT [label="sd_data==1"]
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WAIT_TRANSMIT -> WAIT_END [label="sd_data==0"]
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WAIT_END -> WAIT_END [label="counter!=0"]
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WAIT_END -> FINISH_TRANSMIT [label="counter==0"]
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FINISH_TRANSMIT -> TRANSMIT2;
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TRANSMIT2 -> WAIT_TRANSMIT2;
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WAIT_TRANSMIT2 -> WAIT_TRANSMIT2 [label="sd_data==1"]
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WAIT_TRANSMIT2 -> WAIT_END2 [label="sd_data==0"]
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WAIT_END2 -> WAIT_END2 [label="counter!=0"]
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WAIT_END2 -> FINISH_TRANSMIT2 [label="counter==0"]
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FINISH_TRANSMIT2 -> WAIT_FOR_BUFFER;
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WAIT_FOR_BUFFER -> WAIT_FOR_BUFFER [label="sd_buffer_half==audio_buffer.address_half"];
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WAIT_FOR_BUFFER -> TRANSMIT [label="sd_buffer_half!=audio_buffer.address_half"];
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}
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