Keyboard: Helix serial.c, split_scom.c bug fix and update (#4191)

* helix/serial.c add support PD1,PD3,PE6 and configuration simplify

* Add comment about ATmega32U4 I2C

* Add compile time check for ATmega32U4 I2C

* change TAB code to 8 SPACE code

* Helix serial.c PORTD,PD0 test. OK

  OK PD0
  -  PD1
  OK PD2
  -  PD3
  -  PE6

* Helix serial.c PORTD,PD1 test. OK

   OK PD0
   OK PD1
   OK PD2
   -  PD3
   -  PE6

* Helix serial.c PORTD,PD3 test. OK

   OK PD0
   OK PD1
   OK PD2
   OK PD3
   -  PE6

* Helix serial.c PORTE,PD6 test. OK

   OK PD0
   OK PD1
   OK PD2
   OK PD3
   OK PE6

* Helix serial.c: PD0,PD1,PD3,PE6 all test end

* Helix serial.c: rename SOFT_SERIAL_PORT to SOFT_SERIAL_PIN

* Helix serial.c add debug code

* Helix serial.c: add transaction ID range check

* Helix serial.c debug code update

* Helix serial.c debug code update

* Helix serial.c: Strict checking of the value of tid.

* adjust the delay of serial.c

* Helix serial.c: remove debug code

* remove EXTRAFLAGS += -DCONSOLE_ENABLE from five_rows/rules.mk

tmk_core/common.mk has
 >ifeq ($(strip $(CONSOLE_ENABLE)), yes)
 >   TMK_COMMON_DEFS += -DCONSOLE_ENABLE

* Fix error handling in split_scomm.c

* add some comment to serial.c

* add some comment about SELECT_SOFT_SERIAL_SPEED

1 files changed, 163 insertions, 65 deletions

diff --git a/keyboards/helix/serial.c b/keyboards/helix/serial.c
index 11ceff0b37..830f86b55a 100644
--- a/keyboards/helix/serial.c
+++ b/keyboards/helix/serial.c
@@ -14,7 +14,56 @@
 #include "serial.h"
 //#include <pro_micro.h>
 
-#ifdef USE_SERIAL
+#ifdef SOFT_SERIAL_PIN
+
+#ifdef __AVR_ATmega32U4__
+  // if using ATmega32U4 I2C, can not use PD0 and PD1 in soft serial.
+  #ifdef USE_I2C
+    #if SOFT_SERIAL_PIN == D0 || SOFT_SERIAL_PIN == D1
+      #error Using ATmega32U4 I2C, so can not use PD0, PD1
+    #endif
+  #endif
+
+  #if SOFT_SERIAL_PIN >= D0 && SOFT_SERIAL_PIN <= D3
+    #define SERIAL_PIN_DDR   DDRD
+    #define SERIAL_PIN_PORT  PORTD
+    #define SERIAL_PIN_INPUT PIND
+    #if SOFT_SERIAL_PIN == D0
+      #define SERIAL_PIN_MASK _BV(PD0)
+      #define EIMSK_BIT       _BV(INT0)
+      #define EICRx_BIT       (~(_BV(ISC00) | _BV(ISC01)))
+      #define SERIAL_PIN_INTERRUPT INT0_vect
+    #elif  SOFT_SERIAL_PIN == D1
+      #define SERIAL_PIN_MASK _BV(PD1)
+      #define EIMSK_BIT       _BV(INT1)
+      #define EICRx_BIT       (~(_BV(ISC10) | _BV(ISC11)))
+      #define SERIAL_PIN_INTERRUPT INT1_vect
+    #elif  SOFT_SERIAL_PIN == D2
+      #define SERIAL_PIN_MASK _BV(PD2)
+      #define EIMSK_BIT       _BV(INT2)
+      #define EICRx_BIT       (~(_BV(ISC20) | _BV(ISC21)))
+      #define SERIAL_PIN_INTERRUPT INT2_vect
+    #elif  SOFT_SERIAL_PIN == D3
+      #define SERIAL_PIN_MASK _BV(PD3)
+      #define EIMSK_BIT       _BV(INT3)
+      #define EICRx_BIT       (~(_BV(ISC30) | _BV(ISC31)))
+      #define SERIAL_PIN_INTERRUPT INT3_vect
+    #endif
+  #elif  SOFT_SERIAL_PIN == E6
+    #define SERIAL_PIN_DDR   DDRE
+    #define SERIAL_PIN_PORT  PORTE
+    #define SERIAL_PIN_INPUT PINE
+    #define SERIAL_PIN_MASK  _BV(PE6)
+    #define EIMSK_BIT        _BV(INT6)
+    #define EICRx_BIT        (~(_BV(ISC60) | _BV(ISC61)))
+    #define SERIAL_PIN_INTERRUPT INT6_vect
+  #else
+  #error invalid SOFT_SERIAL_PIN value
+  #endif
+
+#else
+ #error serial.c now support ATmega32U4 only
+#endif
 
 #ifndef SERIAL_USE_MULTI_TRANSACTION
 /* --- USE Simple API (OLD API, compatible with let's split serial.c) */
@@ -42,16 +91,20 @@ SSTD_t transactions[] = {
 };
 
 void serial_master_init(void)
-{ soft_serial_initiator_init(transactions); }
+{ soft_serial_initiator_init(transactions, TID_LIMIT(transactions)); }
 
 void serial_slave_init(void)
-{ soft_serial_target_init(transactions); }
+{ soft_serial_target_init(transactions, TID_LIMIT(transactions)); }
 
 // 0 => no error
 // 1 => slave did not respond
 // 2 => checksum error
 int serial_update_buffers()
-{ return soft_serial_transaction(); }
+{
+    int result;
+    result = soft_serial_transaction();
+    return result;
+}
 
 #endif // Simple API (OLD API, compatible with let's split serial.c)
 
@@ -59,39 +112,66 @@ int serial_update_buffers()
 #define NO_INLINE __attribute__((noinline))
 #define _delay_sub_us(x)    __builtin_avr_delay_cycles(x)
 
-// Serial pulse period in microseconds.
-#define TID_SEND_ADJUST 14
+// parity check
+#define ODD_PARITY 1
+#define EVEN_PARITY 0
+#define PARITY EVEN_PARITY
+
+#ifdef SERIAL_DELAY
+  // custom setup in config.h
+  // #define TID_SEND_ADJUST 2
+  // #define SERIAL_DELAY 6             // micro sec
+  // #define READ_WRITE_START_ADJUST 30 // cycles
+  // #define READ_WRITE_WIDTH_ADJUST 8 // cycles
+#else
+// ============ Standard setups ============
+
+#ifndef SELECT_SOFT_SERIAL_SPEED
+#define SELECT_SOFT_SERIAL_SPEED 1
+//  0: about 189kbps
+//  1: about 137kbps (default)
+//  2: about 75kbps
+//  3: about 39kbps
+//  4: about 26kbps
+//  5: about 20kbps
+#endif
+
+#define TID_SEND_ADJUST 2
 
-#define SELECT_SERIAL_SPEED 1
-#if SELECT_SERIAL_SPEED == 0
+#if SELECT_SOFT_SERIAL_SPEED == 0
   // Very High speed
   #define SERIAL_DELAY 4             // micro sec
   #define READ_WRITE_START_ADJUST 33 // cycles
-  #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-#elif SELECT_SERIAL_SPEED == 1
+  #define READ_WRITE_WIDTH_ADJUST 6 // cycles
+#elif SELECT_SOFT_SERIAL_SPEED == 1
   // High speed
   #define SERIAL_DELAY 6             // micro sec
   #define READ_WRITE_START_ADJUST 30 // cycles
-  #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-#elif SELECT_SERIAL_SPEED == 2
+  #define READ_WRITE_WIDTH_ADJUST 7 // cycles
+#elif SELECT_SOFT_SERIAL_SPEED == 2
   // Middle speed
   #define SERIAL_DELAY 12            // micro sec
   #define READ_WRITE_START_ADJUST 30 // cycles
-  #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-#elif SELECT_SERIAL_SPEED == 3
+  #define READ_WRITE_WIDTH_ADJUST 7 // cycles
+#elif SELECT_SOFT_SERIAL_SPEED == 3
   // Low speed
   #define SERIAL_DELAY 24            // micro sec
   #define READ_WRITE_START_ADJUST 30 // cycles
-  #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-#elif SELECT_SERIAL_SPEED == 4
+  #define READ_WRITE_WIDTH_ADJUST 7 // cycles
+#elif SELECT_SOFT_SERIAL_SPEED == 4
   // Very Low speed
-  #define SERIAL_DELAY 50            // micro sec
+  #define SERIAL_DELAY 36            // micro sec
+  #define READ_WRITE_START_ADJUST 30 // cycles
+  #define READ_WRITE_WIDTH_ADJUST 7 // cycles
+#elif SELECT_SOFT_SERIAL_SPEED == 5
+  // Ultra Low speed
+  #define SERIAL_DELAY 48            // micro sec
   #define READ_WRITE_START_ADJUST 30 // cycles
-  #define READ_WRITE_WIDTH_ADJUST 3 // cycles
+  #define READ_WRITE_WIDTH_ADJUST 7 // cycles
 #else
-#error Illegal Serial Speed
-#endif
-
+#error invalid SELECT_SOFT_SERIAL_SPEED value
+#endif /* SELECT_SOFT_SERIAL_SPEED */
+#endif /* SERIAL_DELAY */
 
 #define SERIAL_DELAY_HALF1 (SERIAL_DELAY/2)
 #define SERIAL_DELAY_HALF2 (SERIAL_DELAY - SERIAL_DELAY/2)
@@ -105,6 +185,7 @@ int serial_update_buffers()
 #endif
 
 static SSTD_t *Transaction_table = NULL;
+static uint8_t Transaction_table_size = 0;
 
 inline static
 void serial_delay(void) {
@@ -152,30 +233,28 @@ void serial_high(void) {
   SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
 }
 
-void soft_serial_initiator_init(SSTD_t *sstd_table)
+void soft_serial_initiator_init(SSTD_t *sstd_table, int sstd_table_size)
 {
     Transaction_table = sstd_table;
+    Transaction_table_size = (uint8_t)sstd_table_size;
     serial_output();
     serial_high();
 }
 
-void soft_serial_target_init(SSTD_t *sstd_table)
+void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size)
 {
     Transaction_table = sstd_table;
+    Transaction_table_size = (uint8_t)sstd_table_size;
     serial_input_with_pullup();
 
-#if SERIAL_PIN_MASK == _BV(PD0)
-    // Enable INT0
-    EIMSK |= _BV(INT0);
-    // Trigger on falling edge of INT0
-    EICRA &= ~(_BV(ISC00) | _BV(ISC01));
-#elif SERIAL_PIN_MASK == _BV(PD2)
-    // Enable INT2
-    EIMSK |= _BV(INT2);
-    // Trigger on falling edge of INT2
-    EICRA &= ~(_BV(ISC20) | _BV(ISC21));
+    // Enable INT0-INT3,INT6
+    EIMSK |= EIMSK_BIT;
+#if SERIAL_PIN_MASK == _BV(PE6)
+    // Trigger on falling edge of INT6
+    EICRB &= EICRx_BIT;
 #else
- #error unknown SERIAL_PIN_MASK value
+    // Trigger on falling edge of INT0-INT3
+    EICRA &= EICRx_BIT;
 #endif
 }
 
@@ -205,12 +284,12 @@ static uint8_t serial_read_chunk(uint8_t *pterrcount, uint8_t bit) {
     uint8_t byte, i, p, pb;
 
   _delay_sub_us(READ_WRITE_START_ADJUST);
-  for( i = 0, byte = 0, p = 0; i < bit; i++ ) {
+  for( i = 0, byte = 0, p = PARITY; i < bit; i++ ) {
       serial_delay_half1();   // read the middle of pulses
       if( serial_read_pin() ) {
-	  byte = (byte << 1) | 1; p ^= 1;
+          byte = (byte << 1) | 1; p ^= 1;
       } else {
-	  byte = (byte << 1) | 0; p ^= 0;
+          byte = (byte << 1) | 0; p ^= 0;
       }
       _delay_sub_us(READ_WRITE_WIDTH_ADJUST);
       serial_delay_half2();
@@ -230,13 +309,13 @@ static uint8_t serial_read_chunk(uint8_t *pterrcount, uint8_t bit) {
 void serial_write_chunk(uint8_t data, uint8_t bit) NO_INLINE;
 void serial_write_chunk(uint8_t data, uint8_t bit) {
     uint8_t b, p;
-    for( p = 0, b = 1<<(bit-1); b ; b >>= 1) {
-	if(data & b) {
-	    serial_high(); p ^= 1;
-	} else {
-	    serial_low();  p ^= 0;
-	}
-	serial_delay();
+    for( p = PARITY, b = 1<<(bit-1); b ; b >>= 1) {
+        if(data & b) {
+            serial_high(); p ^= 1;
+        } else {
+            serial_low();  p ^= 0;
+        }
+        serial_delay();
     }
     /* send parity bit */
     if(p & 1) { serial_high(); }
@@ -288,6 +367,13 @@ void change_reciver2sender(void) {
     serial_delay_half1(); //4
 }
 
+static inline uint8_t nibble_bits_count(uint8_t bits)
+{
+    bits = (bits & 0x5) + (bits >> 1 & 0x5);
+    bits = (bits & 0x3) + (bits >> 2 & 0x3);
+    return bits;
+}
+
 // interrupt handle to be used by the target device
 ISR(SERIAL_PIN_INTERRUPT) {
 
@@ -297,12 +383,15 @@ ISR(SERIAL_PIN_INTERRUPT) {
   SSTD_t *trans = Transaction_table;
 #else
   // recive transaction table index
-  uint8_t tid;
+  uint8_t tid, bits;
   uint8_t pecount = 0;
   sync_recv();
-  tid = serial_read_chunk(&pecount,4);
-  if(pecount> 0)
+  bits = serial_read_chunk(&pecount,7);
+  tid = bits>>3;
+  bits = (bits&7) != nibble_bits_count(tid);
+  if( bits || pecount> 0 || tid > Transaction_table_size ) {
       return;
+  }
   serial_delay_half1();
 
   serial_high(); // response step1 low->high
@@ -315,17 +404,17 @@ ISR(SERIAL_PIN_INTERRUPT) {
   // target send phase
   if( trans->target2initiator_buffer_size > 0 )
       serial_send_packet((uint8_t *)trans->target2initiator_buffer,
-			 trans->target2initiator_buffer_size);
+                         trans->target2initiator_buffer_size);
   // target switch to input
   change_sender2reciver();
 
   // target recive phase
   if( trans->initiator2target_buffer_size > 0 ) {
       if (serial_recive_packet((uint8_t *)trans->initiator2target_buffer,
-			       trans->initiator2target_buffer_size) ) {
-	  *trans->status = TRANSACTION_ACCEPTED;
+                               trans->initiator2target_buffer_size) ) {
+          *trans->status = TRANSACTION_ACCEPTED;
       } else {
-	  *trans->status = TRANSACTION_DATA_ERROR;
+          *trans->status = TRANSACTION_DATA_ERROR;
       }
   } else {
       *trans->status = TRANSACTION_ACCEPTED;
@@ -349,6 +438,8 @@ int  soft_serial_transaction(void) {
   SSTD_t *trans = Transaction_table;
 #else
 int  soft_serial_transaction(int sstd_index) {
+  if( sstd_index > Transaction_table_size )
+      return TRANSACTION_TYPE_ERROR;
   SSTD_t *trans = &Transaction_table[sstd_index];
 #endif
   cli();
@@ -375,9 +466,10 @@ int  soft_serial_transaction(int sstd_index) {
 
 #else
   // send transaction table index
+  int tid = (sstd_index<<3) | (7 & nibble_bits_count(sstd_index));
   sync_send();
   _delay_sub_us(TID_SEND_ADJUST);
-  serial_write_chunk(sstd_index, 4);
+  serial_write_chunk(tid, 7);
   serial_delay_half1();
 
   // wait for the target response (step1 low->high)
@@ -389,12 +481,12 @@ int  soft_serial_transaction(int sstd_index) {
   // check if the target is present (step2 high->low)
   for( int i = 0; serial_read_pin(); i++ ) {
       if (i > SLAVE_INT_ACK_WIDTH + 1) {
-	  // slave failed to pull the line low, assume not present
-	  serial_output();
-	  serial_high();
-	  *trans->status = TRANSACTION_NO_RESPONSE;
-	  sei();
-	  return TRANSACTION_NO_RESPONSE;
+          // slave failed to pull the line low, assume not present
+          serial_output();
+          serial_high();
+          *trans->status = TRANSACTION_NO_RESPONSE;
+          sei();
+          return TRANSACTION_NO_RESPONSE;
       }
       _delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT);
   }
@@ -404,12 +496,12 @@ int  soft_serial_transaction(int sstd_index) {
   // if the target is present syncronize with it
   if( trans->target2initiator_buffer_size > 0 ) {
       if (!serial_recive_packet((uint8_t *)trans->target2initiator_buffer,
-				trans->target2initiator_buffer_size) ) {
-	  serial_output();
-	  serial_high();
-	  *trans->status = TRANSACTION_DATA_ERROR;
-	  sei();
-	  return TRANSACTION_DATA_ERROR;
+                                trans->target2initiator_buffer_size) ) {
+          serial_output();
+          serial_high();
+          *trans->status = TRANSACTION_DATA_ERROR;
+          sei();
+          return TRANSACTION_DATA_ERROR;
       }
    }
 
@@ -419,7 +511,7 @@ int  soft_serial_transaction(int sstd_index) {
   // initiator send phase
   if( trans->initiator2target_buffer_size > 0 ) {
       serial_send_packet((uint8_t *)trans->initiator2target_buffer,
-			 trans->initiator2target_buffer_size);
+                         trans->initiator2target_buffer_size);
   }
 
   // always, release the line when not in use
@@ -442,3 +534,9 @@ int soft_serial_get_and_clean_status(int sstd_index) {
 #endif
 
 #endif
+
+// Helix serial.c history
+//   2018-1-29 fork from let's split (#2308)
+//   2018-6-28 bug fix master to slave comm (#3255)
+//   2018-8-11 improvements (#3608)
+//   2018-10-21 fix serial and RGB animation conflict (#4191)