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Read performance improvements

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- More than 2x improvement in read performance, to 930KB/sec
- Added compatibility for the Keil ARM compiler.  Provides an
  additional 1.5% performance improvement.
This commit is contained in:
Michael McMaster 2013-12-20 21:54:41 +10:00
parent b50aad09c8
commit c8389e5ff7
26 changed files with 547 additions and 156 deletions
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2
STATUS
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@ -1,4 +1,2 @@
- DMA is not used for SPI transfers
- Potential for large performance improvement.
- Parity checking not implemented for the PSoC Datapath implementation

5
readme.txt
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@ -43,7 +43,7 @@ Performance
As currently implemented:
Sequential read: 424kb/sec Sequential write: 414kb/sec
Sequential read: 930kb/sec Sequential write: 414kb/sec
Tested with a 16GB class 10 SD card, via the commands:
@ -53,9 +53,6 @@ Tested with a 16GB class 10 SD card, via the commands:
# READ TEST
sudo dd bs=8192 count=100 if=/dev/sdX of=/dev/null
I am working on updating the SD card communication to use DMA, to allow simultaneous use of the SD and SCSI interfaces. I expect the performance to reach 1Mb/sec.
Compatibility
Tested with Linux (current), Apple Macintosh System 7.5.3 on LC-III, and LC-475

BIN
software/SCSI2SD/SCSI2SD.cydsn/SCSI2SD.cyfit
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348
software/SCSI2SD/SCSI2SD.cydsn/SCSI2SD.cyprj
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@ -26,13 +26,6 @@
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<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@C/C++@General@Generate List Files" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@C/C++@Optimization@Optimization Level" v="Size" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@C/C++@Optimization@Inline Functions" v="False" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@C/C++@Optimization@Split Sections" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@C/C++@Command Line@Command Line" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@Assembly@General@Additional Include Directories" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@Assembly@General@Suppress Warnings" v="False" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@Assembly@General@Generate Debugging Information" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@Assembly@General@Generate List Files" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@Assembly@Command Line@Command Line" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@Linker@General@Additional Libraries" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@Linker@General@Additional Library Directories" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@Linker@General@Generate Debugging Information" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@Linker@General@Generate Map File" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@Linker@General@Use Default Libs" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@Linker@General@Custom Linker Script" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@Linker@Command Line@Command Line" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM0@Library Generation@Command Line@Command Line" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@General@Output Directory" v="${ProjectDir}\${ProcessorType}\${Platform}\${Config}" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@C/C++@General@Additional Include Directories" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@C/C++@General@Strict Compilation" v="False" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@C/C++@General@Generate Debugging Information" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@C/C++@General@Preprocessor Definitions" v="DEBUG" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@C/C++@General@Default Char Unsigned" v="False" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@C/C++@General@Generate List Files" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@C/C++@Optimization@Optimization Level" v="None" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@C/C++@Optimization@Inline Functions" v="False" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@C/C++@Optimization@Split Sections" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@C/C++@Command Line@Command Line" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@Assembly@General@Additional Include Directories" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@Assembly@General@Suppress Warnings" v="False" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@Assembly@General@Generate Debugging Information" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@Assembly@General@Generate List Files" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@Assembly@Command Line@Command Line" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@Linker@General@Additional Libraries" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@Linker@General@Additional Library Directories" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@Linker@General@Generate Debugging Information" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@Linker@General@Generate Map File" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@Linker@General@Use Default Libs" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@Linker@General@Custom Linker Script" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@Linker@Command Line@Command Line" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Debug@CortexM3@Library Generation@Command Line@Command Line" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@General@Output Directory" v="${ProjectDir}\${ProcessorType}\${Platform}\${Config}" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@C/C++@General@Additional Include Directories" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@C/C++@General@Strict Compilation" v="False" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@C/C++@General@Generate Debugging Information" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@C/C++@General@Preprocessor Definitions" v="NDEBUG" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@C/C++@General@Default Char Unsigned" v="False" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@C/C++@General@Generate List Files" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@C/C++@Optimization@Optimization Level" v="Size" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@C/C++@Optimization@Inline Functions" v="False" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@C/C++@Optimization@Split Sections" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@C/C++@Command Line@Command Line" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@Assembly@General@Additional Include Directories" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@Assembly@General@Suppress Warnings" v="False" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@Assembly@General@Generate Debugging Information" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@Assembly@General@Generate List Files" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@Assembly@Command Line@Command Line" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@Linker@General@Additional Libraries" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@Linker@General@Additional Library Directories" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@Linker@General@Generate Debugging Information" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@Linker@General@Generate Map File" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@Linker@General@Use Default Libs" v="True" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@Linker@General@Custom Linker Script" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@Linker@Command Line@Command Line" v="" />
<name_val_pair name="fdb8e1ae-f83a-46cf-9446-1d703716f38a@Release@CortexM3@Library Generation@Command Line@Command Line" v="" />
</name>
</platform>
</platforms>
<project_current_platform v="c9323d49-d323-40b8-9b59-cc008d68a989" />
<project_current_processor v="CortexM3" />
@ -2591,7 +2909,7 @@
<last_selected_tab v="Cypress" />
<component_dependent_projects_generation v="(69eeda1b-ded5-4da3-a74d-3a98f2d5d4ab , 2.1PR) | (b1a3f413-e018-46a5-a51c-20818b2f118e , 3.0) | (cd381074-8dad-4f43-bb88-7719b3e16126 , 2.1) | (29420278-6fcc-46a7-a651-999ec5c253d2 , 2.1) | (e95576e7-780d-474a-b944-018db0492cc9 , 2.1)" />
<WriteAppVersionLastSavedWith v="3.0.0.1539" />
<WriteAppMarketingVersionLastSavedWith v=" 3.0" />
<WriteAppMarketingVersionLastSavedWith v=" 3.0 Component Pack 7" />
<project_id v="6e1f5cbb-a0ca-4f55-a1fa-7b20c5be3a3e" />
<custom_data>
<CyGuid_7a7929f8-5e3b-4f86-a093-2d4ee6513111 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtProjectCustomData" version="1">

2
software/SCSI2SD/SCSI2SD.cydsn/bits.h
View File

@ -24,4 +24,4 @@ extern const uint8 Lookup_OddParity[256];
uint8 countBits(uint8 value);
#endif
#endif

2
software/SCSI2SD/SCSI2SD.cydsn/blinky.c
View File

@ -28,4 +28,4 @@ void scsi2sd_test_blink(void)
LED1_Write(1);
CyDelay(250); // ms
}
}
}

16
software/SCSI2SD/SCSI2SD.cydsn/config.c
View File

@ -92,6 +92,9 @@ static void saveConfig()
void configInit()
{
int shadowRows, shadowBytes;
uint8* eeprom = (uint8*)CYDEV_EE_BASE;
// We could map cfgPtr directly into the EEPROM memory,
// but that would waste power. Copy it to RAM then turn off
// the EEPROM.
@ -99,9 +102,9 @@ void configInit()
CyDelayUs(5); // 5us to start per datasheet.
// Check magic
int shadowRows = (sizeof(shadow) / CYDEV_EEPROM_ROW_SIZE) + 1;
int shadowBytes = CYDEV_EEPROM_ROW_SIZE * shadowRows;
uint8* eeprom = (uint8*)CYDEV_EE_BASE;
shadowRows = (sizeof(shadow) / CYDEV_EEPROM_ROW_SIZE) + 1;
shadowBytes = CYDEV_EEPROM_ROW_SIZE * shadowRows;
if (memcmp(eeprom + shadowBytes, magic, sizeof(magic)))
{
saveConfig();
@ -143,9 +146,12 @@ void configPoll()
if(USBFS_GetEPState(USB_EP_OUT) == USBFS_OUT_BUFFER_FULL)
{
ledOn();
int byteCount;
ledOn();
// The host sent us some data!
int byteCount = USBFS_GetEPCount(USB_EP_OUT);
byteCount = USBFS_GetEPCount(USB_EP_OUT);
// Assume that byteCount <= sizeof(shadow).
// shadow should be padded out to 64bytes, which is the largest

4
software/SCSI2SD/SCSI2SD.cydsn/config.h
View File

@ -36,7 +36,7 @@ typedef struct
extern Config* config;
void configInit();
void configPoll();
void configInit(void);
void configPoll(void);
#endif

10
software/SCSI2SD/SCSI2SD.cydsn/diagnostic.c
View File

@ -122,11 +122,13 @@ void scsiReceiveDiagnostic()
scsiDev.dataLen = allocLength;
}
uint8 lun = scsiDev.cdb[1] >> 5;
// Set the first byte to indicate LUN presence.
if (lun) // We only support lun 0
{
scsiDev.data[0] = 0x7F;
uint8 lun = scsiDev.cdb[1] >> 5;
// Set the first byte to indicate LUN presence.
if (lun) // We only support lun 0
{
scsiDev.data[0] = 0x7F;
}
}
}

6
software/SCSI2SD/SCSI2SD.cydsn/diagnostic.h
View File

@ -17,7 +17,7 @@
#ifndef DIAGNOSTIC_H
#define DIAGNOSTIC_H
void scsiSendDiagnostic();
void scsiReceiveDiagnostic();
void scsiSendDiagnostic(void);
void scsiReceiveDiagnostic(void);
#endif
#endif

4
software/SCSI2SD/SCSI2SD.cydsn/disk.c
View File

@ -33,7 +33,7 @@ static int doSdInit()
if (result)
{
blockDev.state = blockDev.state | DISK_INITIALISED;
// artificially limit this value according to EEPROM config.
blockDev.capacity =
(config->maxBlocks && (sdDev.capacity > config->maxBlocks))
@ -420,10 +420,10 @@ void scsiDiskInit()
if (SD_CD_Read() == 1)
{
int retry;
blockDev.state = blockDev.state | DISK_PRESENT;
// Wait up to 5 seconds for the SD card to wake up.
int retry;
for (retry = 0; retry < 5; ++retry)
{
if (doSdInit())

8
software/SCSI2SD/SCSI2SD.cydsn/disk.h
View File

@ -51,9 +51,9 @@ typedef struct
extern BlockDevice blockDev;
extern Transfer transfer;
void scsiDiskInit();
void scsiDiskReset();
void scsiDiskPoll();
int scsiDiskCommand();
void scsiDiskInit(void);
void scsiDiskReset(void);
void scsiDiskPoll(void);
int scsiDiskCommand(void);
#endif

5
software/SCSI2SD/SCSI2SD.cydsn/geometry.c
View File

@ -91,7 +91,7 @@ uint64 scsiByteAddress(int format, const uint8* addr)
} break;
default:
result = -1;
result = (uint64) -1;
}
return result;
@ -123,10 +123,11 @@ void scsiSaveByteAddress(int format, uint64 byteAddr, uint8* buf)
uint32 cyl;
uint8 head;
uint32 sector;
uint32 bytes;
LBA2CHS(lba, &cyl, &head, &sector);
uint32 bytes = sector * SCSI_SECTOR_SIZE + byteOffset;
bytes = sector * SCSI_SECTOR_SIZE + byteOffset;
buf[0] = cyl >> 16;
buf[1] = cyl >> 8;

3
software/SCSI2SD/SCSI2SD.cydsn/inquiry.c
View File

@ -98,8 +98,9 @@ void scsiInquiry()
}
else
{
uint8* out;
memcpy(scsiDev.data, StandardResponse, sizeof(StandardResponse));
uint8* out = scsiDev.data + sizeof(StandardResponse);
out = scsiDev.data + sizeof(StandardResponse);
memcpy(out, config->vendor, sizeof(config->vendor));
out += sizeof(config->vendor);
memcpy(out, config->prodId, sizeof(config->prodId));

2
software/SCSI2SD/SCSI2SD.cydsn/inquiry.h
View File

@ -17,6 +17,6 @@
#ifndef INQUIRY_H
#define INQUIRY_H
void scsiInquiry();
void scsiInquiry(void);
#endif

2
software/SCSI2SD/SCSI2SD.cydsn/led.h
View File

@ -22,4 +22,4 @@
#define ledOn() LED1_Write(0)
#define ledOff() LED1_Write(1)
#endif
#endif

5
software/SCSI2SD/SCSI2SD.cydsn/loopback.c
View File

@ -72,11 +72,12 @@ static int test_data_10MHz(void)
int i;
for (i = 0; i < 100; ++i)
{
uint8 dbx;
// We write using Active High
SCSI_Out_DBx_Write(0xFF);
CyDelayCycles(3);
// And expect an Active Low response.
uint8 dbx = SCSI_In_DBx_Read();
dbx = SCSI_In_DBx_Read();
result = result && (dbx == 0);
// We write using Active High
@ -145,4 +146,4 @@ void scsi2sd_test_loopback(void)
{
test_success();
}
}
}

5
software/SCSI2SD/SCSI2SD.cydsn/main.c
View File

@ -17,7 +17,6 @@
#include "device.h"
#include "blinky.h"
#include "loopback.h"
#include "scsi.h"
#include "scsiPhy.h"
#include "config.h"
@ -38,10 +37,6 @@ int main()
// Set interrupt handlers.
scsiPhyInit();
// Loopback test requires the interrupt handers.
// Will not return if uncommented.
// scsi2sd_test_loopback();
configInit();
scsiInit();

4
software/SCSI2SD/SCSI2SD.cydsn/mode.c
View File

@ -133,6 +133,8 @@ static void doModeSense(
}
else
{
int pageFound = 1;
////////////// Mode Parameter Header
////////////////////////////////////
@ -195,8 +197,6 @@ static void doModeSense(
scsiDev.data[idx++] = SCSI_BLOCK_SIZE & 0xFF;
}
int pageFound = 1;
switch (pageCode)
{
case 0x3F:

2
software/SCSI2SD/SCSI2SD.cydsn/mode.h
View File

@ -17,6 +17,6 @@
#ifndef MODE_H
#define MODE_H
int scsiModeCommand();
int scsiModeCommand(void);
#endif

92
software/SCSI2SD/SCSI2SD.cydsn/scsi.c
View File

@ -32,19 +32,19 @@
// Global SCSI device state.
ScsiDevice scsiDev;
static void enter_SelectionPhase();
static void process_SelectionPhase();
static void enter_BusFree();
static void enter_SelectionPhase(void);
static void process_SelectionPhase(void);
static void enter_BusFree(void);
static void enter_MessageIn(uint8 message);
static void process_MessageIn();
static void process_MessageIn(void);
static void enter_Status(uint8 status);
static void process_Status();
static void process_Status(void);
static void enter_DataIn(int len);
static void process_DataIn();
static void process_DataOut();
static void process_Command();
static void process_DataIn(void);
static void process_DataOut(void);
static void process_Command(void);
static void doReserveRelease();
static void doReserveRelease(void);
static void enter_BusFree()
{
@ -109,17 +109,20 @@ static void enter_DataIn(int len)
static void process_DataIn()
{
uint32 len;
if (scsiDev.dataLen > sizeof(scsiDev.data))
{
scsiDev.dataLen = sizeof(scsiDev.data);
}
scsiEnterPhase(DATA_IN);
uint32 len = scsiDev.dataLen - scsiDev.dataPtr;
scsiWrite(scsiDev.data + scsiDev.dataPtr, len);
scsiDev.dataPtr += len;
len = scsiDev.dataLen - scsiDev.dataPtr;
if (len > 0)
{
scsiEnterPhase(DATA_IN);
scsiWrite(scsiDev.data + scsiDev.dataPtr, len);
scsiDev.dataPtr += len;
}
if ((scsiDev.dataPtr >= scsiDev.dataLen) &&
(transfer.currentBlock == transfer.blocks))
@ -130,24 +133,29 @@ static void process_DataIn()
static void process_DataOut()
{
uint32 len;
if (scsiDev.dataLen > sizeof(scsiDev.data))
{
scsiDev.dataLen = sizeof(scsiDev.data);
}
scsiEnterPhase(DATA_OUT);
scsiDev.parityError = 0;
uint32 len = scsiDev.dataLen - scsiDev.dataPtr;
scsiRead(scsiDev.data + scsiDev.dataPtr, len);
scsiDev.dataPtr += len;
// TODO re-implement parity checking
if (0 && scsiDev.parityError && config->enableParity)
len = scsiDev.dataLen - scsiDev.dataPtr;
if (len > 0)
{
scsiDev.sense.code = ABORTED_COMMAND;
scsiDev.sense.asc = SCSI_PARITY_ERROR;
enter_Status(CHECK_CONDITION);
scsiEnterPhase(DATA_OUT);
scsiRead(scsiDev.data + scsiDev.dataPtr, len);
scsiDev.dataPtr += len;
// TODO re-implement parity checking
if (0 && scsiDev.parityError && config->enableParity)
{
scsiDev.sense.code = ABORTED_COMMAND;
scsiDev.sense.asc = SCSI_PARITY_ERROR;
enter_Status(CHECK_CONDITION);
}
}
if ((scsiDev.dataPtr >= scsiDev.dataLen) &&
@ -160,18 +168,23 @@ static void process_DataOut()
static const uint8 CmdGroupBytes[8] = {6, 10, 10, 6, 6, 12, 6, 6};
static void process_Command()
{
int group;
int cmdSize;
uint8 command;
uint8 lun;
scsiEnterPhase(COMMAND);
scsiDev.parityError = 0;
memset(scsiDev.cdb, 0, sizeof(scsiDev.cdb));
scsiDev.cdb[0] = scsiReadByte();
int group = scsiDev.cdb[0] >> 5;
int cmdSize = CmdGroupBytes[group];
group = scsiDev.cdb[0] >> 5;
cmdSize = CmdGroupBytes[group];
scsiRead(scsiDev.cdb + 1, cmdSize - 1);
uint8 command = scsiDev.cdb[0];
uint8 lun = scsiDev.cdb[1] >> 5;
command = scsiDev.cdb[0];
lun = scsiDev.cdb[1] >> 5;
if (scsiDev.parityError)
{
@ -395,15 +408,17 @@ static void process_SelectionPhase()
// Save our initiator now that we're no longer in a time-critical
// section.
uint8 initiatorMask = mask ^ scsiDev.scsiIdMask;
scsiDev.initiatorId = 0;
int i;
for (i = 0; i < 8; ++i)
{
if (initiatorMask & (1 << i))
int i;
uint8 initiatorMask = mask ^ scsiDev.scsiIdMask;
scsiDev.initiatorId = 0;
for (i = 0; i < 8; ++i)
{
scsiDev.initiatorId = i;
break;
if (initiatorMask & (1 << i))
{
scsiDev.initiatorId = i;
break;
}
}
}
@ -515,10 +530,11 @@ static void process_MessageOut()
}
else if (scsiDev.msgOut == 0x01)
{
int i;
// Extended message.
int msgLen = scsiReadByte();
if (msgLen == 0) msgLen = 256;
int i;
for (i = 0; i < msgLen && !scsiDev.resetFlag; ++i)
{
// Discard bytes.

6
software/SCSI2SD/SCSI2SD.cydsn/scsi.h
View File

@ -89,8 +89,8 @@ typedef struct
// Only let the reserved initiator talk to us.
// A 3rd party may be sending the RESERVE/RELEASE commands
int initiatorId; // 0 -> 7. Set during the selection phase.
int reservedId;; // 0 -> 7 if reserved. -1 if not reserved.
int reserverId;; // 0 -> 7 if reserved. -1 if not reserved.
int reservedId; // 0 -> 7 if reserved. -1 if not reserved.
int reserverId; // 0 -> 7 if reserved. -1 if not reserved.
// SCSI_STATUS value.
// Change to SCSI_STATUS_CHECK_CONDITION when setting a SENSE value
@ -106,7 +106,7 @@ typedef struct
extern ScsiDevice scsiDev;
void scsiInit();
void scsiInit(void);
void scsiPoll(void);

3
software/SCSI2SD/SCSI2SD.cydsn/scsiPhy.c
View File

@ -52,8 +52,7 @@ uint8 scsiReadByte(void)
while (!(CY_GET_REG8(scsiTarget_StatusReg__STATUS_REG) & 1)) {}
CY_SET_REG8(scsiTarget_datapath__F0_REG, 0);
while (!(CY_GET_REG8(scsiTarget_StatusReg__STATUS_REG) & 2)) {}
uint8 value = CY_GET_REG8(scsiTarget_datapath__F1_REG);
return value;
return CY_GET_REG8(scsiTarget_datapath__F1_REG);
}
void scsiRead(uint8* data, uint32 count)

4
software/SCSI2SD/SCSI2SD.cydsn/scsiPhy.h
View File

@ -30,13 +30,13 @@
// Contains the odd-parity flag for a given 8-bit value.
extern const uint8 Lookup_OddParity[256];
void scsiPhyInit();
void scsiPhyInit(void);
uint8 scsiReadByte(void);
void scsiRead(uint8* data, uint32 count);
void scsiWriteByte(uint8 value);
void scsiWrite(uint8* data, uint32 count);
uint8 scsiReadDBxPins();
uint8 scsiReadDBxPins(void);
void scsiEnterPhase(int phase);

149
software/SCSI2SD/SCSI2SD.cydsn/sd.c
View File

@ -22,6 +22,8 @@
#include "sd.h"
#include "led.h"
#include "scsiPhy.h"
#include <string.h>
// Global
@ -126,12 +128,13 @@ static void sdClearStatus()
void sdPrepareRead()
{
uint8 v;
uint32 len = (transfer.lba + transfer.currentBlock);
if (!sdDev.ccs)
{
len = len * SCSI_BLOCK_SIZE;
}
uint8 v = sdCommandAndResponse(SD_READ_MULTIPLE_BLOCK, len);
v = sdCommandAndResponse(SD_READ_MULTIPLE_BLOCK, len);
if (v)
{
scsiDiskReset();
@ -146,13 +149,16 @@ void sdPrepareRead()
void sdReadSector()
{
int prep, i, guard;
// Wait for a start-block token.
// Don't wait more than 200ms.
int maxWait = 200000;
// Don't wait more than 100ms, which is the timeout recommended
// in the standard.
//100ms @ 64Hz = 6400000
int maxWait = 6400000;
uint8 token = sdSpiByte(0xFF);
while (token != 0xFE && (maxWait-- > 0))
{
CyDelayUs(1);
token = sdSpiByte(0xFF);
}
if (token != 0xFE)
@ -168,28 +174,65 @@ void sdReadSector()
return;
}
int prep = 0;
int i = 0;
// Don't do a bus settle delay if we're already in the correct phase.
if (transfer.currentBlock == 0)
{
scsiEnterPhase(DATA_IN);
}
// Quickly seed the FIFO
prep = 4;
CY_SET_REG8(SDCard_TXDATA_PTR, 0xFF); // Put a byte in the FIFO
CY_SET_REG8(SDCard_TXDATA_PTR, 0xFF); // Put a byte in the FIFO
CY_SET_REG8(SDCard_TXDATA_PTR, 0xFF); // Put a byte in the FIFO
CY_SET_REG8(SDCard_TXDATA_PTR, 0xFF); // Put a byte in the FIFO
i = 0;
guard = 0;
// This loop is critically important for performance.
// We stream data straight from the SDCard fifos into the SCSI component
// FIFO's. If the loop isn't fast enough, the transmit FIFO's will empty,
// and performance will suffer. Every clock cycle counts.
while (i < SCSI_BLOCK_SIZE)
{
if (prep < SCSI_BLOCK_SIZE && (SDCard_ReadTxStatus() & SDCard_STS_TX_FIFO_NOT_FULL))
uint8_t sdRxStatus = CY_GET_REG8(SDCard_RX_STATUS_PTR);
uint8_t scsiStatus = CY_GET_REG8(scsiTarget_StatusReg__STATUS_REG);
// Read from the SPIM fifo if there is room to stream the byte to the
// SCSI fifos
if((sdRxStatus & SDCard_STS_RX_FIFO_NOT_EMPTY) &&
(scsiStatus & 1) // SCSI TX FIFO NOT FULL
)
{
SDCard_WriteTxData(0xFF);
uint8_t val = CY_GET_REG8(SDCard_RXDATA_PTR);
CY_SET_REG8(scsiTarget_datapath__F0_REG, val);
guard++;
}
// Byte has been sent out the SCSI interface.
if (scsiStatus & 2) // SCSI RX FIFO NOT EMPTY
{
CY_GET_REG8(scsiTarget_datapath__F1_REG);
++i;
}
// How many bytes are in a 4-byte FIFO ? 5. 4 FIFO bytes PLUS one byte
// being processed bit-by-bit. Artifically limit the number of bytes in the
// "combined" SPIM TX and RX FIFOS to the individual FIFO size.
// Unlike the SCSI component, SPIM doesn't check if there's room in
// the output FIFO before starting to transmit.
if ((prep - guard < 4) && (prep < SCSI_BLOCK_SIZE))
{
CY_SET_REG8(SDCard_TXDATA_PTR, 0xFF); // Put a byte in the FIFO
prep++;
}
if(SDCard_ReadRxStatus() & SDCard_STS_RX_FIFO_NOT_EMPTY)
{
scsiDev.data[i] = SDCard_ReadRxData();
i++;
}
}
}
sdSpiByte(0xFF); // CRC
sdSpiByte(0xFF); // CRC
scsiDev.dataLen = SCSI_BLOCK_SIZE;
scsiDev.dataPtr = 0;
scsiDev.dataPtr = SCSI_BLOCK_SIZE;
}
void sdCompleteRead()
@ -200,8 +243,9 @@ void sdCompleteRead()
// an error condition as we're trying to read past-the-end of the storage
// device.
// ie. do not use sdCommandAndResponse here.
uint8 r1b;
sdSendCommand(SD_STOP_TRANSMISSION, 0);
uint8 r1b = sdReadResp();
r1b = sdReadResp();
if (r1b)
{
@ -212,7 +256,7 @@ void sdCompleteRead()
r1b = sdCommandAndResponse(SD_STOP_TRANSMISSION, 0);
retries--;
}
scsiDev.status = CHECK_CONDITION;
scsiDev.sense.code = HARDWARE_ERROR;
scsiDev.sense.asc = UNRECOVERED_READ_ERROR;
@ -220,11 +264,13 @@ void sdCompleteRead()
}
// R1b has an optional trailing "busy" signal.
uint8 busy;
do
{
busy = sdSpiByte(0xFF);
} while (busy == 0);
uint8 busy;
do
{
busy = sdSpiByte(0xFF);
} while (busy == 0);
}
}
static void sdWaitWriteBusy()
@ -238,12 +284,13 @@ static void sdWaitWriteBusy()
int sdWriteSector()
{
int result;
int result, i, maxWait;
uint8 dataToken;
// Wait for a previously-written sector to complete.
sdWaitWriteBusy();
sdSpiByte(0xFC); // MULTIPLE byte start token
int i;
for (i = 0; i < SCSI_BLOCK_SIZE; i++)
{
while(!(SDCard_ReadTxStatus() & SDCard_STS_TX_FIFO_NOT_FULL))
@ -252,30 +299,31 @@ int sdWriteSector()
}
while(!(SDCard_ReadTxStatus() & SDCard_STS_SPI_DONE)) {}
SDCard_ClearFIFO();
sdSpiByte(0x00); // CRC
sdSpiByte(0x00); // CRC
// Don't wait more than 1000ms.
// Don't wait more than 1s.
// My 2g Kingston micro-sd card doesn't respond immediately.
// My 16Gb card does.
int maxWait = 1000;
uint8 dataToken = sdSpiByte(0xFF); // Response
maxWait = 1000000;
dataToken = sdSpiByte(0xFF); // Response
while (dataToken == 0xFF && maxWait-- > 0)
{
CyDelay(1); // 1ms.
CyDelayUs(1);
dataToken = sdSpiByte(0xFF);
}
if (((dataToken & 0x1F) >> 1) != 0x2) // Accepted.
{
uint8 r1b, busy;
sdWaitWriteBusy();
uint8 r1b = sdCommandAndResponse(SD_STOP_TRANSMISSION, 0);
r1b = sdCommandAndResponse(SD_STOP_TRANSMISSION, 0);
(void) r1b;
sdSpiByte(0xFF);
// R1b has an optional trailing "busy" signal.
uint8 busy;
do
{
busy = sdSpiByte(0xFF);
@ -305,6 +353,8 @@ int sdWriteSector()
void sdCompleteWrite()
{
uint8 r1, r2;
// Wait for a previously-written sector to complete.
sdWaitWriteBusy();
@ -312,8 +362,8 @@ void sdCompleteWrite()
// Wait for the card to come out of busy.
sdWaitWriteBusy();
uint8 r1 = sdCommandAndResponse(13, 0); // send status
uint8 r2 = sdSpiByte(0xFF);
r1 = sdCommandAndResponse(13, 0); // send status
r2 = sdSpiByte(0xFF);
if (r1 || r2)
{
sdClearStatus();
@ -381,11 +431,12 @@ static int sdOpCond()
static int sdReadOCR()
{
uint8 buf[4];
int i;
uint8 status = sdCRCCommandAndResponse(SD_READ_OCR, 0);
if(status){goto bad;}
uint8 buf[4];
int i;
for (i = 0; i < 4; ++i)
{
buf[i] = sdSpiByte(0xFF);
@ -400,19 +451,20 @@ bad:
static int sdReadCSD()
{
uint8 startToken;
int maxWait, i;
uint8 buf[16];
uint8 status = sdCRCCommandAndResponse(SD_SEND_CSD, 0);
if(status){goto bad;}
uint8 startToken;
int maxWait = 1023;
maxWait = 1023;
do
{
startToken = sdSpiByte(0xFF);
} while(maxWait-- && (startToken != 0xFE));
if (startToken != 0xFE) { goto bad; }
uint8 buf[16];
int i;
for (i = 0; i < 16; ++i)
{
buf[i] = sdSpiByte(0xFF);
@ -452,18 +504,20 @@ bad:
int sdInit()
{
int result = 0;
int i;
uint8 v;
sdDev.version = 0;
sdDev.ccs = 0;
sdDev.capacity = 0;
int result = 0;
SD_CS_Write(1); // Set CS inactive (active low)
SD_Init_Clk_Start(); // Turn on the slow 400KHz clock
SD_Clk_Ctl_Write(0); // Select the 400KHz clock source.
SDCard_Start(); // Enable SPI hardware
// Power on sequence. 74 clock cycles of a "1" while CS unasserted.
int i;
for (i = 0; i < 10; ++i)
{
sdSpiByte(0xFF);
@ -472,7 +526,7 @@ int sdInit()
SD_CS_Write(0); // Set CS active (active low)
CyDelayUs(1);
uint8 v = sdCRCCommandAndResponse(SD_GO_IDLE_STATE, 0);
v = sdCRCCommandAndResponse(SD_GO_IDLE_STATE, 0);
if(v != 1){goto bad;}
ledOn();
@ -525,6 +579,9 @@ out:
void sdPrepareWrite()
{
uint32 len;
uint8 v;
// Set the number of blocks to pre-erase by the multiple block write command
// We don't care about the response - if the command is not accepted, writes
// will just be a bit slower.
@ -533,12 +590,12 @@ void sdPrepareWrite()
sdCommandAndResponse(SD_APP_CMD, 0);
sdCommandAndResponse(SD_APP_SET_WR_BLK_ERASE_COUNT, blocks);
uint32 len = (transfer.lba + transfer.currentBlock);
len = (transfer.lba + transfer.currentBlock);
if (!sdDev.ccs)
{
len = len * SCSI_BLOCK_SIZE;
}
uint8 v = sdCommandAndResponse(25, len);
v = sdCommandAndResponse(25, len);
if (v)
{
scsiDiskReset();

14
software/SCSI2SD/SCSI2SD.cydsn/sd.h
View File

@ -54,13 +54,13 @@ typedef struct
extern SdDevice sdDev;
int sdInit();
void sdPrepareWrite();
int sdWriteSector();
void sdCompleteWrite();
int sdInit(void);
void sdPrepareWrite(void);
int sdWriteSector(void);
void sdCompleteWrite(void);
void sdPrepareRead();
void sdReadSector();
void sdCompleteRead();
void sdPrepareRead(void);
void sdReadSector(void);
void sdCompleteRead(void);
#endif