Rebuild IEC state machine so it's handled in ISR (#816)

* Eliminate a bunch of warnings.

* There doesn't seem to be a contains() method in std::string

* Use commit date instead of newest modified file date by default.

* Print IEC transfer speed.

* Clarify which pins are used for IEC on Lolin D32

* There is no up/down/pull/true/false/high/low/0/1, only assert/release.

* Start moving IEC bus access and state management out of virtual devices.

* Make IEC state private and move IEC access macros to _protocol.h

* Speed up transfer.

* Don't blindly read past end of D64 sector.

* Whitespace cleanup.

* Put state machine into cbm_on_clk_isr_handler()

* Add dynamic delaying before starting transfer.

* JiffyDOS.

* Remove unused functions.

* Don't set bus idle when there's no current command.

* Remove COMPLEX_WAIT ifdef

* Remove legacy IEC_ASSERT_RELEASE_AS_FUNCTIONS

* Don't send command on EOI, wait for unlisten.

* Don't releaseLines() until ATN is released.

* Don't try to do secondary command if there's no primary command.

* Don't discard bytes during LISTEN.

* Release lines immediately on LISTEN.

* Set state to BUS_IDLE when releasing lines.

* Fix problems with transferDelaySinceLast()

include/cbm_defines.h

@@ -140,7 +140,7 @@ typedef enum
 #define CLEAR            0x0000    // clear all flags
 #define CLEAR_LOW        0xFF00    // clear low byte
 #define ERROR            (1 << 0)  // if this flag is set, something went wrong
-#define ATN_PULLED       (1 << 1)  // might be set by iec_receive
+#define ATN_ASSERTED     (1 << 1)  // might be set by iec_receive
 #define EOI_RECVD        (1 << 2)
 #define EMPTY_STREAM     (1 << 3)
 
@@ -161,7 +161,7 @@ typedef enum
 
 #define TIMING_Ts       70      // BIT SET-UP TALKER                     71us    20us    70us        -           
 #define TIMING_Ts0      40      // BIT SET-UP LISTENER PRE       57us    47us
-#define TIMING_Ts1      35      // BIT SET-UP LISTENER POST      18us    24us
+#define TIMING_Ts1      30      // BIT SET-UP LISTENER POST      18us    24us
 #define TIMING_Tv       20      // DATA VALID VIC20              76us    26us    20us    20us        -           (Tv and Tpr minimum must be 60μ s for external device to be a talker. )
 #define TIMING_Tv64     80      // DATA VALID C64
 
@@ -187,9 +187,9 @@ typedef enum
 
 // OTHER
 #define TIMING_EMPTY    512     // SIGNAL EMPTY STREAM
-#define TIMEOUT_ATNCLK  70      // WAIT FOR CLK AFTER ATN IS PULLED
+#define TIMEOUT_ATNCLK  70      // WAIT FOR CLK AFTER ATN IS ASSERTED
 #define TIMEOUT_Ttlta   65      // TALKER/LISTENER TURNAROUND TIMEOUT
-#define TIMING_Ttcp     13      // TALKER TURNAROUND CLOCK PULL
+#define TIMING_Ttcp     13      // TALKER TURNAROUND CLOCK ASSERT
 
 // SPECIAL
 #define TIMING_PROTOCOL_DETECT   218  // SAUCEDOS/JIFFYDOS CAPABLE DELAY
@@ -200,18 +200,7 @@ typedef enum
 #define TIMED_OUT -1
 #define FOREVER 5000000 // 0
 
-#ifndef IEC_INVERTED_LINES
-// Not Inverted
-#define PULLED    true
-#define RELEASED  false
-#define LOW 0x00
-#define HIGH 0x01
-#else
-// Inverted
-#define PULLED    false
-#define RELEASED  true
-#define LOW 0x01
-#define HIGH 0x00
-#endif
+#define IEC_ASSERTED  true
+#define IEC_RELEASED  false
 
 #endif // CBMDEFINES_H

include/pinmap.h

@@ -3,6 +3,8 @@
 #define PINMAP_H
 
 #ifdef ESP_PLATFORM
+#include <hal/gpio_types.h>
+
 #include "pinmap/a2_fn10.h"
 #include "pinmap/a2_rev0.h"
 #include "pinmap/a2_d32pro.h"

include/pinmap/iec-d32pro.h

@@ -42,28 +42,18 @@
 #define PIN_LED_BT              GPIO_NUM_5  // LOLIN D32 PRO
 #endif
 
-/* Audio Output */
-#define PIN_DAC1                GPIO_NUM_25 // samlib.h
-
 /* Commodore IEC Pins */
 #define IEC_HAS_RESET // Reset line is available
 
 #define PIN_IEC_RESET           GPIO_NUM_34
 #define PIN_IEC_ATN             GPIO_NUM_32
 #define PIN_IEC_CLK_IN          GPIO_NUM_33
-#define PIN_IEC_CLK_OUT         GPIO_NUM_33
+#define PIN_IEC_CLK_OUT         PIN_IEC_CLK_IN
 #define PIN_IEC_DATA_IN         GPIO_NUM_25
-#define PIN_IEC_DATA_OUT        GPIO_NUM_25
+#define PIN_IEC_DATA_OUT        PIN_IEC_DATA_IN
 #define PIN_IEC_SRQ             GPIO_NUM_26
 
-/* Color Computer */
-#define PIN_CASS_MOTOR          GPIO_NUM_34 // Second motor pin is tied to +3V
-#define PIN_CASS_DATA_IN        GPIO_NUM_33
-#define PIN_CASS_DATA_OUT       GPIO_NUM_26
-
-#define PIN_SERIAL_CD           GPIO_NUM_32
-#define PIN_SERIAL_RX           GPIO_NUM_9  // fnUartBUS
-#define PIN_SERIAL_TX           GPIO_NUM_10
+#define PIN_DEBUG		PIN_IEC_SRQ
 
 #endif // PINMAP_IEC_D32PRO
-#endif // PINMAP_LOLIN_D32_PRO_H
+#endif // PINMAP_LOLIN_D32_PRO_H