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readres2 and readbytes assembly rewrite

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This commit is contained in:
Byron Lathi
2023-07-23 18:00:22 -07:00
parent 2ef463846f
commit 028a431189
2 changed files with 45 additions and 1 deletions
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4
sw/bootloader/devices/sd_card.c
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@@ -158,6 +158,7 @@ uint8_t SD_readRes1()
/*******************************************************************************
Read R2 from SD card
*******************************************************************************/
/*
void SD_readRes2(uint8_t *res)
{
// read response 1 in R2
@@ -166,6 +167,7 @@ void SD_readRes2(uint8_t *res)
// read final byte of response
res[1] = spi_exchange(0xFF);
}
*/
/*******************************************************************************
Read R3 from SD card
@@ -200,10 +202,12 @@ void SD_readRes7(uint8_t *res)
/*******************************************************************************
Read specified number of bytes from SD card
*******************************************************************************/
/*
void SD_readBytes(uint8_t *res, uint8_t n)
{
while(n--) *res++ = spi_exchange(0xFF);
}
*/
/*******************************************************************************
Command Idle State (CMD0)