AT32F435: Fix RDATA pin deassert when drive is deselected.

This was fixed for 105/415 Goteks long ago in bb7f7f0, however
the layout of a GPIO config word is different on 435 and the O_FALSE
level specifier was at the incorrect bit offset.

Author: keirf

inc/mcu/at32f435_regs.h

@@ -250,6 +250,7 @@ struct gpio {
 #define GPO_opendrain(speed,level) (0x5u|((speed)<<3)|((level)<<7))
 #define AFI(pupd)                  (0x2u|((pupd)<<5))
 #define AFO_pushpull(speed)        (0x2u|((speed)<<3))
+#define _AFO_pushpull(speed,level) (0x2u|((speed)<<3)|((level)<<7))
 #define AFO_opendrain(speed)       (0x6u|((speed)<<3))
 #define _2MHz 0
 #define _10MHz 0

inc/mcu/stm32f105_regs.h

@@ -165,6 +165,7 @@ struct gpio {
 #define GPO_pushpull(speed,level)  (0x0u|(speed)|((level)<<4))
 #define GPO_opendrain(speed,level) (0x4u|(speed)|((level)<<4))
 #define AFO_pushpull(speed)        (0x8u|(speed))
+#define _AFO_pushpull(speed,level) (0x8u|(speed)|((level)<<4))
 #define AFO_opendrain(speed)       (0xcu|(speed))
 #define _2MHz  2
 #define _10MHz 1

src/floppy.c

@@ -11,7 +11,7 @@
 
 #define GPI_bus GPI_floating
 #define GPO_bus GPO_pushpull(_2MHz,O_FALSE)
-#define AFO_bus (AFO_pushpull(_2MHz) | (O_FALSE<<4))
+#define AFO_bus _AFO_pushpull(_2MHz,O_FALSE)
 
 #define GPO_rdata GPO_bus
 #define AFO_rdata AFO_bus

src/quickdisk.c

@@ -12,7 +12,7 @@
 #define GPI_bus GPI_floating
 #define GPO_bus GPO_pushpull(_2MHz, HIGH)
 #define GPO_rdata GPO_pushpull(_2MHz, LOW)
-#define AFO_rdata (AFO_pushpull(_2MHz) | (LOW<<4))
+#define AFO_rdata _AFO_pushpull(_2MHz,LOW)
 
 /* READY-window state machine and timer handling. */
 static struct window {