GPIO mode tweaks. Mode 1 is actually 10MHz PUSH/PULL, OD is mode 7. For DB PU/PD input, set the resistors to PU. Set REQ to match DB output mode.

src/BlueSCSI.cpp

@@ -153,22 +153,22 @@ SdFs SD;
 // IN , FLOAT      : 4
 // IN , PU/PD      : 8
 // OUT, PUSH/PULL  : 3
-// OUT, OD         : 1
-//#define DB_MODE_OUT 3
-#define DB_MODE_OUT 1
+// OUT, OD         : 7
+#define DB_MODE_OUT 3
+//#define DB_MODE_OUT 7
 #define DB_MODE_IN  8
 
 // 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;  }
+#define SCSI_DB_INPUT()  { PBREG->CRL=(PBREG->CRL &0xfffffff0)|DB_MODE_IN ; PBREG->CRH = 0x11111111*DB_MODE_IN; if (DB_MODE_IN == 8) PBREG->BSRR = 0xFF01;}
 
 // 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()   { }
+#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() { SCSI_OUT(vREQ,inactive); SCSI_OUT(vMSG,inactive); SCSI_OUT(vCD,inactive);SCSI_OUT(vIO,inactive); SCSI_OUT(vBSY,inactive); gpio_mode(BSY, GPIO_INPUT_PU); }
+#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)} SCSI_OUT(vMSG,inactive); SCSI_OUT(vCD,inactive);SCSI_OUT(vIO,inactive); SCSI_OUT(vBSY,inactive); gpio_mode(BSY, GPIO_INPUT_PU); }
 
 // HDDiamge file
 #define HDIMG_ID_POS  2                 // Position to embed ID number