v1.1-20220620

We only need to test full and half speed spi

.gitignore

@@ -2,3 +2,4 @@
 .DS_Store
 .vscode/
 workspace.code-workspace
+dist/

README.adoc

@@ -63,7 +63,7 @@ https://github.com/erichelgeson/BlueSCSI/wiki/Troubleshooting
 
 #### 1.1-a Desktop
 
-* Binky! There are now resistors and pin outs for Power and Activity LED's
+* Blinky! There are now resistors and pin outs for Power and Activity LED's
 * Resistor nets flipped all the same way
 * 50 pin allows for right angle connector
 * SD Card facing out the back - gives some better options for mounting and access

dist.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+set -e
+set -x
+
+DATE=$(date +%Y%m%d)
+VERSION="v1.1-$DATE"
+mkdir -p dist
+rm -f dist/*.bin
+
+for f in $(ls .pio/build/*/firmware.bin); do
+    NAME="BlueSCSI-$VERSION-$(echo $f | cut -d\/ -f3).bin"
+    cp $f dist/$NAME
+done

docs/1.0b-to-1.0c.adoc

@@ -3,25 +3,25 @@
 
 ## Introduction
 
-1.0-c was a small change to fix an issue with machines that provide low or no `TERMPOWER` over the SCSI bus. If you recived a Fully Assembled BlueSCSI after April 1st, 2021 then this was done for you. If you have a kit labled 1.0-b you can make these modifications to become a 1.0-c.
+1.0-c was a small change to fix an issue with machines that provide low or no `TERMPOWER` over the SCSI bus. If you received a fully-assembled BlueSCSI after April 1st, 2021 then this was done for you. If you have a kit labeled 1.0-b you can make these modifications to become a 1.0-c.
 
 ## Steps
 
-### Disconnect `TERMPOWER` from 220 Pull Up Jupmer
+### Disconnect `TERMPOWER` from 220 Pull Up Jumper
 
 Use a cutting tool to cut the small trace between the `TERMPOWR` and 220 Pull Up Jumper pictured below.
 
-Make sure continiutiy from `TERMPOWER` to the diode still flows correctly but is disconnected from the jumper.
+Make sure continuity from `TERMPOWER` to the diode still flows correctly but is disconnected from the jumper.
 
 image::images/1.0-b-bodge-1.jpg[]
 
-### Connect 5V to 220 Pull Up Jupmer
+### Connect 5V to 220 Pull Up Jumper
 
-Now we will provide pull up from the 5v provided by the BluePill.
+Now we will provide pull up from the 5V provided by the BluePill.
 
 image::images/1.0-b-bodge-2.png[]
 
 ### Complete!
 
-Thats it! 5v to the Pull Up resistors will now work when powered externally.
+That’s it! 5V to the Pull Up resistors will now work when powered externally.
 

docs/assembly.md

@@ -1,66 +1,5 @@
 # Assembly
 
-## Before you start
+Instructions have moved to the wiki
 
-Read through all instructions before starting.
-
-## Videos
-
-The community has created a few assembly videos:
-* [Stephen Arsenault - BlueSCSI Kit Assembly](https://www.youtube.com/watch?v=G6lwCfLQwd8) 2:52
-* [Joe's Computer Museum - A New Challenger - BlueSCSI - #MARCHintosh Review](https://www.youtube.com/watch?v=d_8VVmvvlNI) 26:52
-* [Geeky Bit - Tutorial - BlueSCSI Assembly](https://www.youtube.com/watch?v=-nF9FYFgVHM) 20:35
-
-## Building
-
-1. Solder on the surface mount SD Card holder. Use the [Drag Solder](https://youtu.be/Z_KL4fWOMug) technique.
-    - Once on, check continuity of all connections. Fixing this after the BluePill is on will be difficult.
-    - Ensure the SD card fits and you dont have too much solder on the sides or contacts
-2. Solder the diodes to the **bottom** of the board. Be sure they are flush as possible to the bottom.
-![Diode Orientation](images/diodes.png)
-3. Solder the header pins on to the BluePill. Then BluePill pill to the BlueSCSI PCB.
-    - Correct orientation is having the USB connector of the BluePill should be over the SD Card holder.
-    - **NOTE**: Consider adding headers to the board if you would like to have the BluePill removable.
-4. Solder on the resistor nets. Pin one is marked on the board and the resistors.
-   - 220 RNETS (`RN1` & `RN3`) are closest to the BluePill
-     - **NOTE** PIN one on each - they are opposite of eachtoher. See photo.
-   - 330 RNETS (`RN2` & `RN4`) are furthest from the BluePill
-     - **NOTE** PIN one on each - they are opposite of eachtoher. See photo.
-![Orientation RNETs and BluePill](images/orientation.png)
-5. Solder on the Termination Jumpers & place the jumpers on to enable Termiation
-6. Solder the 50 Pin headers on.
-   1. Note Pin 1 and Box header on the silk screen.
-7. Optional - Solder on the berg connector. Only needed if your machine does not supply enough power via the SCSI bus.
-8. Optional - Solder on the debug headers near the SD card. Only nessissarry if re-programming.
-
-### Fully Assembled
-![Fully Assembled](images/assembled.png)
-
-### Version 1.0-b & 1.0-c BOM
-
-#### Mouser Cart
-
-https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=c5cc83feff
-
-#### Parts
-
-STM32F103C8T6 (U1) aka BluePill board. Beware of fake/scams. Look for reviews. Amazon, ebay, etc.
-
-* 2x 330 (RN2, RN4) Resistor nets https://www.mouser.com/ProductDetail/652-4610X-1LF-330
-
-* 2x 220 (RN1, RN3) Resistor nets https://www.mouser.com/ProductDetail/652-4610X-1LF-220
-
-* 2x Diodes https://www.mouser.com/ProductDetail/583-1N5818-T
-
-* SD Card Holder (J1)  https://www.mouser.com/ProductDetail/538-104031-0811
-
-* Headers https://www.mouser.com/ProductDetail/872-920-0011-01
-
-* 50 PIN SCSI header https://www.mouser.com/ProductDetail/517-30350-6002/
-  - May substitute with 2 rows of headers from above.
-  - **Note on Right angle connectors** - it appears Right angle headers are notched differently then the pin out. Be sure to note PIN 1/red stripe on the cable match up.
-
-### Optional
-
-Floppy/Berg Power header https://www.mouser.com/ProductDetail/571-1718254
-  - Required if your machine does not supply power via TERM POWER. For example a Mac Plus or Mac with a Analog/PSU board that has not been recapped.
+https://github.com/erichelgeson/BlueSCSI/wiki/Assembly

docs/build-your-own.adoc

@@ -1,7 +1,7 @@
 
 # Build Your Own
 
-These instructions will guide you thorugh purchasing all of the parts needed to assemble kits for yourselves and for friends! Please note the hardware is licensed non-comercial.
+These instructions will guide you through purchasing all of the parts needed to assemble kits for yourselves and for friends! Please note the hardware is licensed non-commercial.
 
 If you'd like to buy the kits pre-packaged/pre-flashed or fully assembled we have a network of makers here to help you out at https://scsi.blue
 
@@ -11,11 +11,11 @@ Updated for 1.0-c.
 
 ### PCB's
 
-Grab the latest Gerbers. Gerber files tell the PCB manufactuer how to create the BlueSCSI boards.
+Grab the latest Gerbers. Gerber files tell the PCB manufacturer how to create the BlueSCSI boards.
 
 https://github.com/erichelgeson/BlueSCSI/tree/main/hw/
 
-Order the boards from https://jlcpcb.com/ or your manufactuer of choice.
+Order the boards from https://jlcpcb.com/ or your manufacturer of choice.
 
 ### Components
 
@@ -55,6 +55,6 @@ https://github.com/erichelgeson/BlueSCSI#flashing
 
 ## Usage
 
-Be sure to follow the usage instructions for getting your drive images setup:
+Be sure to follow the usage instructions for getting your drive images set up:
 
 https://github.com/erichelgeson/BlueSCSI#usage

platformio.ini

@@ -1,20 +1,15 @@
 ; PlatformIO Project Configuration File https://docs.platformio.org/page/projectconf.html
 
-[env:genericSTM32F103C8]
-platform = ststm32
-board = genericSTM32F103C8
-board_build.mcu = stm32f103c8t6
-board_build.core = maple
+[platformio]
+default_envs = STM32F1
+
+[env]
 framework = arduino
 lib_deps =
     greiman/SdFat @ ^2.0.6
 upload_protocol = stlink
 ; Different gcc versions produce much different binaries in terms of speed.
 platform_packages = platformio/toolchain-gccarmnoneeabi@1.90301.200702
-
-build_unflags = 
-    -Os
-    -DARDUINO_ARCH_STM32F1
 build_flags = 
     -w
     -DARDUINO_GENERIC_STM32F103C
@@ -23,9 +18,78 @@ build_flags =
     -DARDUINO_ARCH_STM32
     -DDEBUG_LEVEL=DEBUG_NONE
     -O2
+    -D BUILD_TAGS="\"\""
+build_unflags = 
+    -Os
+    -DARDUINO_ARCH_STM32F1
+upload_flags = -c set CPUTAPID 0
 
-; Work around for clones.
-; https://community.platformio.org/t/cannot-upload-to-stm32-bluepill-board-over-stlink-v2/3492/25
+[env:STM32F1]
+platform = ststm32
+board = genericSTM32F103C8
+board_build.mcu = stm32f103c8t6
+board_build.core = maple
+
+[env:STM32F1-XCVR]
+extends = env:STM32F1
+build_flags = ${env.build_flags}
+    -DXCVR
+    -D BUILD_TAGS="\"-XCVR\""
+
+[env:STM32F1-USB-128MHz]
+# Max overclock for STM32
+# Can use for APM32F1 as well.
+extends = env:STM32F1-USB
+board_build.f_cpu = 128000000L
+build_flags = ${env.build_flags}
+    -D BUILD_TAGS="\"-USB-128MHz\""
+
+[env:STM32F1-USB-96MHz]
+# Slight overclock for STM32
+# Use for APM32F1's - it's default clock is 96MHz and runs unstable at 72MHz(STM32F1's default)
+extends = env:STM32F1-USB
+# Explicilty define the multiplier as maple only handles a few cases.
+build_flags = ${env.build_flags}
+    -D BUILD_TAGS="\"-USB-96MHz\""
+    -D PIO_FRAMEWORK_ARDUINO_ENABLE_CDC
+    -D USBCON
+    -D USBD_VID=0x0483
+    -D USB_MANUFACTURER="Unknown"
+    -D USB_PRODUCT="\"BLUEPILL_F103C8\""
+    -D HAL_PCD_MODULE_ENABLED
+    -DBOARD_RCC_PLLMUL=RCC_PLLMUL_12 #96000000L
+
+# TODO: Find out why USB build flags get trampled when extending an extended env.
+[env:STM32F1-USB]
+platform = ststm32
+board = genericSTM32F103C8
+board_build.mcu = stm32f103c8t6
+board_build.core = maple
+board_build.f_cpu = 128000000L
+framework = arduino
+lib_deps =
+    greiman/SdFat @ ^2.0.6
+upload_protocol = dfu
+; Different gcc versions produce much different binaries in terms of speed.
+platform_packages = platformio/toolchain-gccarmnoneeabi@1.90301.200702
+build_flags =
+    -D BUILD_TAGS="\"-USB\""
+    -D PIO_FRAMEWORK_ARDUINO_ENABLE_CDC
+    -D USBCON
+    -D USBD_VID=0x0483
+    -D USB_MANUFACTURER="Unknown"
+    -D USB_PRODUCT="\"BLUEPILL_F103C8\""
+    -D HAL_PCD_MODULE_ENABLED
+    -w
+    -DARDUINO_GENERIC_STM32F103C
+    -DARDUINO_LIB_DISCOVERY_PHASE
+    -DARDUINO=10813
+    -DARDUINO_ARCH_STM32
+    -DDEBUG_LEVEL=DEBUG_NONE
+    -O2
+build_unflags =
+    -Os
+    -DARDUINO_ARCH_STM32F1
 upload_flags = -c set CPUTAPID 0
 
 ; [env:debug]

src/BlueSCSI.h

@@ -0,0 +1,323 @@
+#ifndef __BLUESCSI_H__
+#define __BLUESCSI_H__
+
+#include <Arduino.h> // For Platform.IO
+#include <SdFat.h>
+
+// SCSI config
+#define MAX_SCSIID  7          // Maximum number of supported SCSI-IDs (The minimum is 0)
+#define MAX_SCSILUN 1          // Maximum number of LUNs supported     (The minimum is 0)
+#define NUM_SCSIID  MAX_SCSIID // Number of enabled SCSI IDs
+#define NUM_SCSILUN 1          // Number of enabled LUNs
+#define READ_PARITY_CHECK 0    // Perform read parity check (unverified)
+#define DEFAULT_SCSI_ID 1
+#define DEFAULT_SCSI_LUN 0
+#define SCSI_BUF_SIZE 512      // Size of the SCSI Buffer
+#define HDD_BLOCK_SIZE 512
+#define OPTICAL_BLOCK_SIZE 2048
+
+// HDD format
+#define MAX_BLOCKSIZE 4096     // Maximum BLOCK size
+
+// SDFAT
+#define SD1_CONFIG SdSpiConfig(PA4, DEDICATED_SPI, SD_SCK_MHZ(SPI_FULL_SPEED), &SPI)
+
+// LED ERRORS
+#define ERROR_FALSE_INIT  3
+#define ERROR_NO_SDCARD   5
+
+
+#if DEBUG
+#define LOG(XX)     Serial.print(XX)
+#define LOGHEX(XX)  Serial.print(XX, HEX)
+#define LOGN(XX)    Serial.println(XX)
+#define LOGHEXN(XX) Serial.println(XX, HEX)
+#else
+#define LOG(XX)     //Serial.print(XX)
+#define LOGHEX(XX)  //Serial.print(XX, HEX)
+#define LOGN(XX)    //Serial.println(XX)
+#define LOGHEXN(XX) //Serial.println(XX, HEX)
+#endif
+
+#define active   1
+#define inactive 0
+#define high 0
+#define low 1
+
+#define isHigh(XX) ((XX) == high)
+#define isLow(XX) ((XX) != high)
+
+#define gpio_mode(pin,val) gpio_set_mode(PIN_MAP[pin].gpio_device, PIN_MAP[pin].gpio_bit, val);
+#define gpio_write(pin,val) gpio_write_bit(PIN_MAP[pin].gpio_device, PIN_MAP[pin].gpio_bit, val)
+#define gpio_read(pin) gpio_read_bit(PIN_MAP[pin].gpio_device, PIN_MAP[pin].gpio_bit)
+
+//#define DB0       PB8     // SCSI:DB0
+//#define DB1       PB9     // SCSI:DB1
+//#define DB2       PB10    // SCSI:DB2
+//#define DB3       PB11    // SCSI:DB3
+//#define DB4       PB12    // SCSI:DB4
+//#define DB5       PB13    // SCSI:DB5
+//#define DB6       PB14    // SCSI:DB6
+//#define DB7       PB15    // SCSI:DB7
+//#define DBP       PB0     // SCSI:DBP
+#define ATN       PA8      // SCSI:ATN
+#define BSY       PA9      // SCSI:BSY
+#define ACK       PA10     // SCSI:ACK
+#define RST       PA15     // SCSI:RST
+#define MSG       PB3      // SCSI:MSG
+#define SEL       PB4      // SCSI:SEL
+#define CD        PB5      // SCSI:C/D
+#define REQ       PB6      // SCSI:REQ
+#define IO        PB7      // SCSI:I/O
+
+#define SD_CS     PA4      // SDCARD:CS
+#define LED       PC13     // LED
+#define LED2      PA0      // External LED
+
+// Image Set Selector
+#ifdef XCVR
+#define IMAGE_SELECT1   PC14
+#define IMAGE_SELECT2   PC15
+#else
+#define IMAGE_SELECT1   PA1
+#define IMAGE_SELECT2   PB1
+#endif
+
+// GPIO register port
+#define PAREG GPIOA->regs
+#define PBREG GPIOB->regs
+#define PCREG GPIOC->regs
+
+// LED control
+#define LED_ON()  PCREG->BSRR = 0b00100000000000000000000000000000; PAREG->BSRR = 0b00000000000000000000000000000001;
+#define LED_OFF() PCREG->BSRR = 0b00000000000000000010000000000000; PAREG->BSRR = 0b00000000000000010000000000000000;
+
+// Virtual pin (Arduio compatibility is slow, so make it MCU-dependent)
+#define PA(BIT)       (BIT)
+#define PB(BIT)       (BIT+16)
+// Virtual pin decoding
+#define GPIOREG(VPIN)    ((VPIN)>=16?PBREG:PAREG)
+#define BITMASK(VPIN) (1<<((VPIN)&15))
+
+#define vATN       PA(8)      // SCSI:ATN
+#define vBSY       PA(9)      // SCSI:BSY
+#define vACK       PA(10)     // SCSI:ACK
+#define vRST       PA(15)     // SCSI:RST
+#define vMSG       PB(3)      // SCSI:MSG
+#define vSEL       PB(4)      // SCSI:SEL
+#define vCD        PB(5)      // SCSI:C/D
+#define vREQ       PB(6)      // SCSI:REQ
+#define vIO        PB(7)      // SCSI:I/O
+#define vSD_CS     PA(4)      // SDCARD:CS
+
+// SCSI output pin control: opendrain active LOW (direct pin drive)
+#define SCSI_OUT(VPIN,ACTIVE) { GPIOREG(VPIN)->BSRR = BITMASK(VPIN)<<((ACTIVE)?16:0); }
+
+// SCSI input pin check (inactive=0,avtive=1)
+#define SCSI_IN(VPIN) ((~GPIOREG(VPIN)->IDR>>(VPIN&15))&1)
+
+#define NOP(x) for(unsigned _nopcount = x; _nopcount; _nopcount--) { asm("NOP"); }
+
+/* SCSI Timing delays */
+// Due to limitations in timing granularity all of these are "very" rough estimates
+#define SCSI_BUS_SETTLE() NOP(30);                            // spec 400ns ours ~420us
+#define SCSI_DATA_RELEASE() NOP(30);                          // spec 400ns ours ~420us
+#define SCSI_HOLD_TIME() asm("NOP"); asm("NOP"); asm("NOP");  // spec 45ns ours ~42ns
+#define SCSI_DESKEW() // asm("NOP"); asm("NOP"); asm("NOP");     // spec 45ns ours ~42ns
+#define SCSI_CABLE_SKEW() // asm("NOP");                         // spec 10ns ours ~14ns
+#define SCSI_RESET_HOLD() asm("NOP"); asm("NOP");             // spec 25ns ours ~28ns
+#define SCSI_DISCONNECTION_DELAY() NOP(15);                   // spec 200ns ours ~210ns
+
+/* SCSI phases
++=============-===============-==================================-============+
+|    Signal   |  Phase name   |       Direction of transfer      |  Comment   |
+|-------------|               |                                  |            |
+| MSG|C/D|I/O |               |                                  |            |
+|----+---+----+---------------+----------------------------------+------------|
+|  0 | 0 | 0  |  DATA OUT     |       Initiator to target     \  |  Data      |
+|  0 | 0 | 1  |  DATA IN      |       Initiator from target   /  |  phase     |
+|  0 | 1 | 0  |  COMMAND      |       Initiator to target        |            |
+|  0 | 1 | 1  |  STATUS       |       Initiator from target      |            |
+|  1 | 0 | 0  |  *            |                                  |            |
+|  1 | 0 | 1  |  *            |                                  |            |
+|  1 | 1 | 0  |  MESSAGE OUT  |       Initiator to target     \  |  Message   |
+|  1 | 1 | 1  |  MESSAGE IN   |       Initiator from target   /  |  phase     |
+|-----------------------------------------------------------------------------|
+| Key:  0 = False,  1 = True,  * = Reserved for future standardization        |
++=============================================================================+ 
+*/
+// SCSI phase change as single write to port B
+#define SCSIPHASEMASK(MSGACTIVE, CDACTIVE, IOACTIVE) ((BITMASK(vMSG)<<((MSGACTIVE)?16:0)) | (BITMASK(vCD)<<((CDACTIVE)?16:0)) | (BITMASK(vIO)<<((IOACTIVE)?16:0)))
+
+#define SCSI_PHASE_DATAOUT SCSIPHASEMASK(inactive, inactive, inactive)
+#define SCSI_PHASE_DATAIN SCSIPHASEMASK(inactive, inactive, active)
+#define SCSI_PHASE_COMMAND SCSIPHASEMASK(inactive, active, inactive)
+#define SCSI_PHASE_STATUS SCSIPHASEMASK(inactive, active, active)
+#define SCSI_PHASE_MESSAGEOUT SCSIPHASEMASK(active, active, inactive)
+#define SCSI_PHASE_MESSAGEIN SCSIPHASEMASK(active, active, active)
+
+#define SCSI_PHASE_CHANGE(MASK) { PBREG->BSRR = (MASK); }
+
+#ifdef XCVR
+#define TR_TARGET        PA1   // Target Transceiver Control Pin
+#define TR_DBP           PA2   // Data Pins Transceiver Control Pin
+#define TR_INITIATOR     PA3   // Initiator Transciever Control Pin
+
+#define vTR_TARGET       PA(1) // Target Transceiver Control Pin
+#define vTR_DBP          PA(2) // Data Pins Transceiver Control Pin
+#define vTR_INITIATOR    PA(3) // Initiator Transciever Control Pin
+
+#define TR_INPUT 1
+#define TR_OUTPUT 0
+
+// Transceiver control definitions
+#define TRANSCEIVER_IO_SET(VPIN,TR_INPUT) { GPIOREG(VPIN)->BSRR = BITMASK(VPIN) << ((TR_INPUT) ? 16 : 0); }
+
+// Turn on the output only for BSY
+#define SCSI_BSY_ACTIVE()      {  gpio_mode(BSY, GPIO_OUTPUT_PP); SCSI_OUT(vBSY, active) }
+
+#define SCSI_TARGET_ACTIVE()   { gpio_mode(REQ, GPIO_OUTPUT_PP); gpio_mode(MSG, GPIO_OUTPUT_PP); gpio_mode(CD, GPIO_OUTPUT_PP); gpio_mode(IO, GPIO_OUTPUT_PP); gpio_mode(BSY, GPIO_OUTPUT_PP);  TRANSCEIVER_IO_SET(vTR_TARGET,TR_OUTPUT);}
+// BSY,REQ,MSG,CD,IO Turn off output, BSY is the last input
+#define SCSI_TARGET_INACTIVE() { pinMode(REQ, INPUT); pinMode(MSG, INPUT); pinMode(CD, INPUT); pinMode(IO, INPUT); pinMode(BSY, INPUT); TRANSCEIVER_IO_SET(vTR_TARGET,TR_INPUT); }
+
+#define DB_MODE_OUT 1  // push-pull mode
+#define DB_MODE_IN  4  // floating inputs
+
+#else
+
+// GPIO mode
+// IN , FLOAT      : 4
+// IN , PU/PD      : 8
+// OUT, PUSH/PULL  : 3
+// OUT, OD         : 1
+#define DB_MODE_OUT 3
+//#define DB_MODE_OUT 7
+#define DB_MODE_IN  8
+
+
+// Turn on the output only for BSY
+#define SCSI_BSY_ACTIVE()      { gpio_mode(BSY, GPIO_OUTPUT_OD); SCSI_OUT(vBSY,  active) }
+// BSY,REQ,MSG,CD,IO Turn on the output (no change required for OD)
+#define SCSI_TARGET_ACTIVE()   { if (DB_MODE_OUT != 7) gpio_mode(REQ, GPIO_OUTPUT_PP); }
+// BSY,REQ,MSG,CD,IO Turn off output, BSY is the last input
+#define SCSI_TARGET_INACTIVE() { if (DB_MODE_OUT == 7) SCSI_OUT(vREQ,inactive) else { if (DB_MODE_IN == 8) gpio_mode(REQ, GPIO_INPUT_PU) else gpio_mode(REQ, GPIO_INPUT_FLOATING)} PBREG->BSRR = 0b000000000000000011101000; SCSI_OUT(vBSY,inactive); gpio_mode(BSY, GPIO_INPUT_PU); }
+
+#endif
+
+// Put DB and DP in output mode
+#define SCSI_DB_OUTPUT() { PBREG->CRL=(PBREG->CRL &0xfffffff0)|DB_MODE_OUT; PBREG->CRH = 0x11111111*DB_MODE_OUT; }
+// Put DB and DP in input mode
+#define SCSI_DB_INPUT()  { PBREG->CRL=(PBREG->CRL &0xfffffff0)|DB_MODE_IN ; PBREG->CRH = 0x11111111*DB_MODE_IN; }
+
+// HDDiamge file
+#define HDIMG_ID_POS  2                 // Position to embed ID number
+#define HDIMG_LUN_POS 3                 // Position to embed LUN numbers
+#define HDIMG_BLK_POS 5                 // Position to embed block size numbers
+#define MAX_FILE_PATH 32                // Maximum file name length
+
+/*
+ *  Data byte to BSRR register setting value and parity table
+*/
+
+// Parity bit generation
+#define PTY(V)   (1^((V)^((V)>>1)^((V)>>2)^((V)>>3)^((V)>>4)^((V)>>5)^((V)>>6)^((V)>>7))&1)
+
+// Data byte to BSRR register setting value conversion table
+// BSRR[31:24] =  DB[7:0]
+// BSRR[   16] =  PTY(DB)
+// BSRR[15: 8] = ~DB[7:0]
+// BSRR[    0] = ~PTY(DB)
+
+// Set DBP, set REQ = inactive
+#define DBP(D)    ((((((uint32_t)(D)<<8)|PTY(D))*0x00010001)^0x0000ff01)|BITMASK(vREQ))
+//#define DBP(D)    ((((((uint32_t)(D)<<8)|PTY(D))*0x00010001)^0x0000ff01))
+
+
+//#define DBP8(D)   DBP(D),DBP(D+1),DBP(D+2),DBP(D+3),DBP(D+4),DBP(D+5),DBP(D+6),DBP(D+7)
+//#define DBP32(D)  DBP8(D),DBP8(D+8),DBP8(D+16),DBP8(D+24)
+
+// BSRR register control value that simultaneously performs DB set, DP set, and REQ = H (inactrive)
+uint32_t db_bsrr[256];
+// Parity bit acquisition
+#define PARITY(DB) (db_bsrr[DB]&1)
+
+// Macro cleaning
+//#undef DBP32
+//#undef DBP8
+//#undef DBP
+//#undef PTY
+
+// #define GET_CDB6_LBA(x) ((x[2] & 01f) << 16) | (x[3] << 8) | x[4]
+#define READ_DATA_BUS() (byte)((~(uint32_t)GPIOB->regs->IDR)>>8)
+
+enum SCSI_DEVICE_TYPE
+{
+  SCSI_DEVICE_HDD,
+  SCSI_DEVICE_OPTICAL,
+};
+
+#define CDROM_RAW_SECTORSIZE    2352
+#define CDROM_COMMON_SECTORSIZE 2048
+
+struct SCSI_INQUIRY_DATA
+{
+  union
+  {
+  struct {
+    // bitfields are in REVERSE order for ARM
+    // byte 0
+    byte peripheral_device_type:5;
+    byte peripheral_qualifier:3;
+    // byte 1
+    byte reserved_byte2:7;
+    byte rmb:1;
+    // byte 2
+    byte ansi_version:3;
+    byte always_zero_byte3:5;
+    // byte 3
+    byte response_format:4;
+    byte reserved_byte4:2;
+    byte tiop:1;
+    byte always_zero_byte4:1;
+    // byte 4
+    byte additional_length;
+    // byte 5-6
+    byte reserved_byte5;
+    byte reserved_byte6;
+    // byte 7
+    byte sync:1;
+    byte always_zero_byte7_more:4;
+    byte always_zero_byte7:3;
+    // byte 8-15
+    char vendor[8];
+    // byte 16-31
+    char product[16];
+    // byte 32-35
+    char revision[4];
+    // byte 36
+    byte release;
+    // 37-46
+    char revision_date[10];
+  };
+  // raw bytes
+  byte raw[64];
+  };
+};
+
+// HDD image
+typedef __attribute__((aligned(4))) struct _SCSI_DEVICE
+{
+	FsFile        *m_file;                 // File object
+	uint64_t      m_fileSize;             // File size
+	size_t        m_blocksize;            // SCSI BLOCK size
+  uint8_t       m_type;                 // SCSI device type
+  uint32_t      m_blockcount;           // blockcount
+  bool          m_raw;                  // Raw disk
+  SCSI_INQUIRY_DATA inquiry_block;      // SCSI information
+  uint8_t       m_senseKey;               // Sense key
+  uint16_t      m_additional_sense_code;  // ASC/ASCQ 
+  bool          m_mode2;                  // MODE2 CDROM
+} SCSI_DEVICE;
+
+
+#endif

src/scsi_cmds.h

@@ -0,0 +1,84 @@
+#ifndef __SCSI_CMDS_H__
+#define __SCSI_CMDS_H__
+
+// defines for SCSI commands
+#define SCSI_TEST_UNIT_READY        0
+#define SCSI_REZERO_UNIT            0x1
+#define SCSI_REQUEST_SENSE          0x3
+#define SCSI_FORMAT_UNIT4           0x4
+#define SCSI_FORMAT_UNIT6           0x6
+#define SCSI_REASSIGN_BLOCKS        0x7
+#define SCSI_READ6                  0x8
+#define SCSI_WRITE6                 0xA
+#define SCSI_SEEK6                  0xB
+#define SCSI_INQUIRY                0x12
+#define SCSI_MODE_SELECT6           0x15
+#define SCSI_RESERVE                0x16
+#define SCSI_RELEASE                0x17
+#define SCSI_COPY                   0x18
+#define SCSI_MODE_SENSE6            0x1A
+#define SCSI_START_STOP_UNIT        0x1B
+#define SCSI_RECV_DIAG_RESULTS      0x1C
+#define SCSI_SEND_DIAG              0x1D
+#define SCSI_PREVENT_ALLOW_REMOVAL  0x1E
+#define SCSI_READ_CAPACITY          0x25
+#define SCSI_READ10                 0x28
+#define SCSI_WRITE10                0x2A
+#define SCSI_SEEK10                 0x2B
+#define SCSI_WRITE_AND_VERIFY       0x2E
+#define SCSI_VERIFY10               0x2F
+#define SCSI_SEARCH_DATA_HIGH       0x30
+#define SCSI_SEARCH_DATA_EQUAL      0x31
+#define SCSI_SEARCH_DATA_LOW        0x32
+#define SCSI_SET_LIMITS             0x33
+#define SCSI_PREFETCH               0x34
+#define SCSI_SYNCHRONIZE_CACHE      0x35
+#define SCSI_LOCK_UNLOCK_CACHE      0x36
+#define SCSI_READ_DEFECT_DATA       0x37
+#define SCSI_COMPARE                0x39
+#define SCSI_COPY_AND_VERIFY        0x3A
+#define SCSI_WRITE_BUFFER           0x3B
+#define SCSI_READ_BUFFER            0x3C
+#define SCSI_READ_LONG              0x3E
+#define SCSI_WRITE_LONG             0x3F
+#define SCSI_CHANGE_DEFINITION      0x40
+#define SCSI_WRITE_SAME             0x41
+#define SCSI_LOG_SELECT             0x4C
+#define SCSI_LOG_SENSE              0x4D
+#define SCSI_MODE_SELECT10          0x55
+#define SCSI_MODE_SENSE10           0x5A
+#define SCSI_READ12                 0xA8
+#define SCSI_VERIFY12               0xAF
+
+
+#define SCSI_TOC_LENGTH 20 // length for default CDROM TOC
+
+// SCSI CDROM commands
+#define SCSI_AUDIO_SCAN1            0xBA
+#define SCSI_AUDIO_SCAN2            0xCD
+#define SCSI_PAUSE_RESUME           0x4B
+#define SCSI_PLAY_AUDIO10           0x45
+#define SCSI_PLAY_AUDIO12           0xA5
+#define SCSI_PLAY_AUDIO_MSF         0x47
+#define SCSI_PLAY_AUDIO_TRACK_IDX   0x48
+#define SCSI_PLAY_TRACK_RELATIVE10  0x49
+#define SCSI_PLAY_TRACK_RELATIVE12  0xA9
+#define SCSI_READ_CD                0xBE
+#define SCSI_READ_CD_DD             0xD8
+#define SCSI_READ_CD_MSF            0xB9
+#define SCSI_READ_CDDA_MSF          0xD9
+#define SCSI_READ_CDXA              0xDB
+#define SCSI_READ_ALL_SUBCODE       0xDF
+#define SCSI_READ_HEADER            0x44
+#define SCSI_READ_SUBCHANNEL        0x42
+#define SCSI_READ_TOC               0x43
+#define SCSI_READ_DISC_INFORMATION  0x51
+#define SCSI_READ_DVD_STRUCTURE     0xAD
+#define SCSI_SET_CDROM_SPEED1       0xBB
+#define SCSI_SET_CDROM_SPEED2       0xDA
+#define SCSI_STOP_PLAY_SCAN         0x4E
+#define SCSI_READ_CDP               0xE4
+#define SCSI_READ_DRIVE_STATUS      0xE0
+#define SCSI_WRITE_CDP              0xE3
+
+#endif // __SCSI_CMDS_H__

src/scsi_mode.h

@@ -0,0 +1,9 @@
+#ifndef __SCSI_MODE_H__
+#define __SCSI_MODE_H__
+
+#define MODE_COMBINED_HEADER_DATA   0x00
+#define MODE_NOT_SUPPORTED          0x01
+#define MODE_DATA                   0x02
+#define MODE_DESCRIPTOR             0x03
+
+#endif

src/scsi_sense.h

@@ -0,0 +1,46 @@
+#ifndef __SCSI_SENSE_H__
+#define __SCSI_SENSE_H__
+
+#define SCSI_SENSE_NO_SENSE         0
+#define SCSI_SENSE_RECOVERED_ERROR  0x1
+#define SCSI_SENSE_NOT_READY        0x2
+#define SCSI_SENSE_MEDUIM_ERROR     0x3
+#define SCSI_SENSE_HARDWARE_ERROR   0x4
+#define SCSI_SENSE_ILLEGAL_REQUEST  0x5
+#define SCSI_SENSE_UNIT_ATTENTION   0x6
+#define SCSI_SENSE_DATA_PROTECT     0x7
+#define SCSI_SENSE_BLANK_CHECK      0x8
+#define SCSI_SENSE_VENDOR_SPECIFIC  0x9
+#define SCSI_SENSE_COPY_ABORTED     0xa
+#define SCSI_SENSE_ABORTED_COMMAND  0xb
+#define SCSI_SENSE_EQUAL            0xc
+#define SCSI_SENSE_VOLUME_OVERFLOW  0xd
+#define SCSI_SENSE_MISCOMPARE       0xe
+#define SCSI_SENSE_RESERVED         0xf
+
+
+#define SCSI_ASC_INVALID_OPERATION_CODE                         0x2000
+#define SCSI_ASC_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE             0x2100
+#define SCSI_ASC_INVALID_FIELD_IN_CDB                           0x2400
+#define SCSI_ASC_LOGICAL_UNIT_NOT_SUPPORTED                     0x2500
+#define SCSI_ASC_INVALID_FIELD_PARAMETER_LIST                   0x2600
+#define SCSI_ASC_WRITE_PROTECTED                                0x2700
+#define SCSI_ASC_CANNOT_READ_MEDIUM_UNKNOWN_FORMAT              0x3001
+#define SCSI_ASC_CANNOT_READ_MEDIUM_INCOMPATIBLE_FORMAT         0x3002
+#define SCSI_ASC_MEDIUM_NOT_PRESENT                             0x3A00
+#define SCSI_ASC_LUN_NOT_READY_MANUAL_INTERVENTION_REQUIRED     0x0403
+
+
+// SCSI mode page codes
+#define SCSI_SENSE_MODE_VENDOR                      0x00
+#define SCSI_SENSE_MODE_READ_WRITE_ERROR_RECOVERY   0x01
+#define SCSI_SENSE_MODE_DISCONNECT_RECONNECT        0x02
+#define SCSI_SENSE_MODE_FORMAT_DEVICE               0x03
+#define SCSI_SENSE_MODE_DISK_GEOMETRY               0x04
+#define SCSI_SENSE_MODE_FLEXABLE_GEOMETRY           0x05
+#define SCSI_SENSE_MODE_VENDOR_APPLE                0x30
+
+#define SCSI_SENSE_MODE_ALL                         0x3F
+
+
+#endif

src/scsi_status.h

@@ -0,0 +1,14 @@
+#ifndef __SCSI_STATUS_H__
+#define __SCSI_STATUS_H__
+
+#define SCSI_STATUS_GOOD                            0
+#define SCSI_STATUS_CHECK_CONDITION                 0x2
+#define SCSI_STATUS_CONDITION_MET                   0x4
+#define SCSI_STATUS_BUSY                            0x8
+#define SCSI_STATUS_INTERMEDIATE                    0x16
+#define SCSI_STATUS_INTERMEDIATE_CONDITION_MET      0x20
+#define SCSI_STATUS_RESERVATION_CONFLICT            0x24
+#define SCSI_STATUS_COMMAND_TERMINATED              0x34
+#define SCSI_STATUS_QUEUE_FULL                      0x40
+
+#endif