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Read some data off of the sd card

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These series of commands are enough to read the first 512b block off of
the sd card. The RCA is hard coded to the sd card that I have on hand,
since response codes are not supported
This commit is contained in:
Byron Lathi
2022-04-10 19:34:38 -05:00
parent 7092cc8f77
commit 385efb2511
1 changed files with 12 additions and 0 deletions
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12
sw/main.c
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@@ -47,8 +47,20 @@ int main() {
cprintf("Reading from 0x4000: %x\n", *(unsigned int*)(0x4000));
cprintf("Reading from 0x5000: %x\n", *(unsigned int*)(0x5000));
// This will read a 512 block from the sd card.
// The RCA is hard coded for the one that I have on hand as responses
// are not implemented yet.
sd_card_command(0, 0);
sd_card_command(0x000001aa, 8);
sd_card_command(0, 55);
sd_card_command(0x40180000, 41);
sd_card_command(0, 55);
sd_card_command(0x40180000, 41);
sd_card_command(0, 2);
sd_card_command(0, 3);
sd_card_command(0x59b40000, 7);
sd_card_command(0x59b41000, 13);
sd_card_command(0, 17);
while (1) {