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Reorder bus phase change and file.seek() so that file.seek() acts as a bus settle delay.

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This commit is contained in:
Glenn Anderson 2022-03-28 15:01:40 -07:00
parent 08a57174eb
commit 79835832d1
1 changed files with 12 additions and 7 deletions
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19
src/BlueSCSI.cpp
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@ -877,12 +877,13 @@ void writeDataLoop(uint32_t blocksize)
void writeDataPhaseSD(uint32_t adds, uint32_t len)
{
LOGN("DATAIN PHASE(SD)");
uint32_t pos = adds * m_img->m_blocksize;
m_img->m_file.seek(pos);
SCSI_OUT(vMSG,inactive) // gpio_write(MSG, low);
SCSI_OUT(vCD ,inactive) // gpio_write(CD, low);
SCSI_OUT(vIO , active) // gpio_write(IO, high);
//Bus settle delay 400ns, file.seek() measured at over 1000ns.
uint32_t pos = adds * m_img->m_blocksize;
m_img->m_file.seek(pos);
SCSI_DB_OUTPUT()
for(uint32_t i = 0; i < len; i++) {
@ -966,11 +967,13 @@ void readDataLoop(uint32_t blockSize)
void readDataPhaseSD(uint32_t adds, uint32_t len)
{
LOGN("DATAOUT PHASE(SD)");
uint32_t pos = adds * m_img->m_blocksize;
m_img->m_file.seek(pos);
SCSI_OUT(vMSG,inactive) // gpio_write(MSG, low);
SCSI_OUT(vCD ,inactive) // gpio_write(CD, low);
SCSI_OUT(vIO ,inactive) // gpio_write(IO, low);
//Bus settle delay 400ns, file.seek() measured at over 1000ns.
uint32_t pos = adds * m_img->m_blocksize;
m_img->m_file.seek(pos);
for(uint32_t i = 0; i < len; i++) {
m_resetJmp = true;
#if WRITE_SPEED_OPTIMIZE
@ -998,11 +1001,13 @@ void readDataPhaseSD(uint32_t adds, uint32_t len)
void verifyDataPhaseSD(uint32_t adds, uint32_t len)
{
LOGN("DATAOUT PHASE(SD)");
uint32_t pos = adds * m_img->m_blocksize;
m_img->m_file.seek(pos);
SCSI_OUT(vMSG,inactive) // gpio_write(MSG, low);
SCSI_OUT(vCD ,inactive) // gpio_write(CD, low);
SCSI_OUT(vIO ,inactive) // gpio_write(IO, low);
//Bus settle delay 400ns, file.seek() measured at over 1000ns.
uint32_t pos = adds * m_img->m_blocksize;
m_img->m_file.seek(pos);
for(uint32_t i = 0; i < len; i++) {
#if WRITE_SPEED_OPTIMIZE
readDataLoop(m_img->m_blocksize);