7 files changed, 28 insertions(+), 91 deletions(-)

M drivers/serial.h
M platforms/avr/drivers/serial.c
M platforms/chibios/drivers/serial.c
M platforms/chibios/drivers/serial_usart.c
M quantum/split_common/transactions.c
M quantum/split_common/transactions.h
M quantum/split_common/transport.c

@@ 26,21 26,4 @@ void soft_serial_initiator_init(void);
 // target is interrupt accept side
 void soft_serial_target_init(void);
 
-// initiator result
-#define TRANSACTION_END 0
-#define TRANSACTION_NO_RESPONSE 0x1
-#define TRANSACTION_DATA_ERROR 0x2
-#define TRANSACTION_TYPE_ERROR 0x4
-int soft_serial_transaction(int sstd_index);
-
-// target status
-// *SSTD_t.status has
-//   initiator:
-//       TRANSACTION_END
-//    or TRANSACTION_NO_RESPONSE
-//    or TRANSACTION_DATA_ERROR
-//   target:
-//       TRANSACTION_DATA_ERROR
-//    or TRANSACTION_ACCEPTED
-#define TRANSACTION_ACCEPTED 0x8
-int soft_serial_get_and_clean_status(int sstd_index);
+bool soft_serial_transaction(int sstd_index);

@@ 409,13 409,7 @@ ISR(SERIAL_PIN_INTERRUPT) {
 
     // target recive phase
     if (trans->initiator2target_buffer_size > 0) {
-        if (serial_recive_packet((uint8_t *)split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size)) {
-            *trans->status = TRANSACTION_ACCEPTED;
-        } else {
-            *trans->status = TRANSACTION_DATA_ERROR;
-        }
-    } else {
-        *trans->status = TRANSACTION_ACCEPTED;
+        serial_recive_packet((uint8_t *)split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size);
     }
 
     sync_recv();  // weit initiator output to high


@@ 424,19 418,13 @@ ISR(SERIAL_PIN_INTERRUPT) {
 /////////
 //  start transaction by initiator
 //
-// int  soft_serial_transaction(int sstd_index)
+// bool  soft_serial_transaction(int sstd_index)
 //
-// Returns:
-//    TRANSACTION_END
-//    TRANSACTION_NO_RESPONSE
-//    TRANSACTION_DATA_ERROR
 // this code is very time dependent, so we need to disable interrupts
-int soft_serial_transaction(int sstd_index) {
-    if (sstd_index > NUM_TOTAL_TRANSACTIONS) return TRANSACTION_TYPE_ERROR;
+bool soft_serial_transaction(int sstd_index) {
+    if (sstd_index > NUM_TOTAL_TRANSACTIONS) return false;
     split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
 
-    if (!trans->status) return TRANSACTION_TYPE_ERROR;  // not registered
-
     cli();
 
     // signal to the target that we want to start a transaction


@@ 463,9 451,8 @@ int soft_serial_transaction(int sstd_index) {
             // slave failed to pull the line low, assume not present
             serial_output();
             serial_high();
-            *trans->status = TRANSACTION_NO_RESPONSE;
             sei();
-            return TRANSACTION_NO_RESPONSE;
+            return false;
         }
         _delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT);
     }


@@ 476,9 463,8 @@ int soft_serial_transaction(int sstd_index) {
         if (!serial_recive_packet((uint8_t *)split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size)) {
             serial_output();
             serial_high();
-            *trans->status = TRANSACTION_DATA_ERROR;
             sei();
-            return TRANSACTION_DATA_ERROR;
+            return false;
         }
     }
 


@@ 493,19 479,8 @@ int soft_serial_transaction(int sstd_index) {
     // always, release the line when not in use
     sync_send();
 
-    *trans->status = TRANSACTION_END;
-    sei();
-    return TRANSACTION_END;
-}
-
-int soft_serial_get_and_clean_status(int sstd_index) {
-    split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
-    cli();
-    int retval     = *trans->status;
-    *trans->status = 0;
-    ;
     sei();
-    return retval;
+    return true;
 }
 #endif
 

@@ 179,8 179,6 @@ void interrupt_handler(void *arg) {
     // wait for the sync to finish sending
     serial_delay();
 
-    *trans->status = (checksum_computed == checksum_received) ? TRANSACTION_ACCEPTED : TRANSACTION_DATA_ERROR;
-
     // end transaction
     serial_input();
 


@@ 193,17 191,12 @@ void interrupt_handler(void *arg) {
 /////////
 //  start transaction by initiator
 //
-// int  soft_serial_transaction(int sstd_index)
+// bool  soft_serial_transaction(int sstd_index)
 //
-// Returns:
-//    TRANSACTION_END
-//    TRANSACTION_NO_RESPONSE
-//    TRANSACTION_DATA_ERROR
 // this code is very time dependent, so we need to disable interrupts
-int soft_serial_transaction(int sstd_index) {
-    if (sstd_index > NUM_TOTAL_TRANSACTIONS) return TRANSACTION_TYPE_ERROR;
+bool soft_serial_transaction(int sstd_index) {
+    if (sstd_index > NUM_TOTAL_TRANSACTIONS) return false;
     split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
-    if (!trans->status) return TRANSACTION_TYPE_ERROR;  // not registered
 
     // TODO: remove extra delay between transactions
     serial_delay();


@@ 226,7 219,7 @@ int soft_serial_transaction(int sstd_index) {
         // slave failed to pull the line low, assume not present
         dprintf("serial::NO_RESPONSE\n");
         chSysUnlock();
-        return TRANSACTION_NO_RESPONSE;
+        return false;
     }
 
     // if the slave is present syncronize with it


@@ 266,7 259,7 @@ int soft_serial_transaction(int sstd_index) {
         serial_high();
 
         chSysUnlock();
-        return TRANSACTION_DATA_ERROR;
+        return false;
     }
 
     // always, release the line when not in use


@@ 274,5 267,5 @@ int soft_serial_transaction(int sstd_index) {
     serial_output();
 
     chSysUnlock();
-    return TRANSACTION_END;
+    return true;
 }

@@ 36,7 36,7 @@ static SerialDriver* serial_driver = &SERIAL_USART_DRIVER;
 static inline bool react_to_transactions(void);
 static inline bool __attribute__((nonnull)) receive(uint8_t* destination, const size_t size);
 static inline bool __attribute__((nonnull)) send(const uint8_t* source, const size_t size);
-static inline int  initiate_transaction(uint8_t sstd_index);
+static inline bool initiate_transaction(uint8_t sstd_index);
 static inline void usart_clear(void);
 
 /**


@@ 206,14 206,12 @@ static inline bool react_to_transactions(void) {
      to signal that the slave is ready to receive possible transaction buffers  */
     sstd_index ^= HANDSHAKE_MAGIC;
     if (!send(&sstd_index, sizeof(sstd_index))) {
-        *trans->status = TRANSACTION_DATA_ERROR;
         return false;
     }
 
     /* Receive transaction buffer from the master. If this transaction requires it.*/
     if (trans->initiator2target_buffer_size) {
         if (!receive(split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size)) {
-            *trans->status = TRANSACTION_DATA_ERROR;
             return false;
         }
     }


@@ 226,12 224,10 @@ static inline bool react_to_transactions(void) {
     /* Send transaction buffer to the master. If this transaction requires it. */
     if (trans->target2initiator_buffer_size) {
         if (!send(split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size)) {
-            *trans->status = TRANSACTION_DATA_ERROR;
             return false;
         }
     }
 
-    *trans->status = TRANSACTION_ACCEPTED;
     return true;
 }
 


@@ 252,11 248,9 @@ void soft_serial_initiator_init(void) {
  * @brief Start transaction from the master half to the slave half.
  *
  * @param index Transaction Table index of the transaction to start.
- * @return int TRANSACTION_NO_RESPONSE in case of Timeout.
- *             TRANSACTION_TYPE_ERROR in case of invalid transaction index.
- *             TRANSACTION_END in case of success.
+ * @return bool Indicates success of transaction.
  */
-int soft_serial_transaction(int index) {
+bool soft_serial_transaction(int index) {
     /* Clear the receive queue, to start with a clean slate.
      * Parts of failed transactions or spurious bytes could still be in it. */
     usart_clear();


@@ 266,25 260,19 @@ int soft_serial_transaction(int index) {
 /**
  * @brief Initiate transaction to slave half.
  */
-static inline int initiate_transaction(uint8_t sstd_index) {
+static inline bool initiate_transaction(uint8_t sstd_index) {
     /* Sanity check that we are actually starting a valid transaction. */
     if (sstd_index >= NUM_TOTAL_TRANSACTIONS) {
         dprintln("USART: Illegal transaction Id.");
-        return TRANSACTION_TYPE_ERROR;
+        return false;
     }
 
     split_transaction_desc_t* trans = &split_transaction_table[sstd_index];
 
-    /* Transaction is not registered. Abort. */
-    if (!trans->status) {
-        dprintln("USART: Transaction not registered.");
-        return TRANSACTION_TYPE_ERROR;
-    }
-
     /* Send transaction table index to the slave, which doubles as basic handshake token. */
     if (!send(&sstd_index, sizeof(sstd_index))) {
         dprintln("USART: Send Handshake failed.");
-        return TRANSACTION_TYPE_ERROR;
+        return false;
     }
 
     uint8_t sstd_index_shake = 0xFF;


@@ 295,14 283,14 @@ static inline int initiate_transaction(uint8_t sstd_index) {
      */
     if (!receive(&sstd_index_shake, sizeof(sstd_index_shake)) || (sstd_index_shake != (sstd_index ^ HANDSHAKE_MAGIC))) {
         dprintln("USART: Handshake failed.");
-        return TRANSACTION_NO_RESPONSE;
+        return false;
     }
 
     /* Send transaction buffer to the slave. If this transaction requires it. */
     if (trans->initiator2target_buffer_size) {
         if (!send(split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size)) {
             dprintln("USART: Send failed.");
-            return TRANSACTION_NO_RESPONSE;
+            return false;
         }
     }
 


@@ 310,9 298,9 @@ static inline int initiate_transaction(uint8_t sstd_index) {
     if (trans->target2initiator_buffer_size) {
         if (!receive(split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size)) {
             dprintln("USART: Receive failed.");
-            return TRANSACTION_NO_RESPONSE;
+            return false;
         }
     }
 
-    return TRANSACTION_END;
+    return true;
 }

@@ 35,11 35,11 @@
 #define sizeof_member(type, member) sizeof(((type *)NULL)->member)
 
 #define trans_initiator2target_initializer_cb(member, cb) \
-    { &dummy, sizeof_member(split_shared_memory_t, member), offsetof(split_shared_memory_t, member), 0, 0, cb }
+    { sizeof_member(split_shared_memory_t, member), offsetof(split_shared_memory_t, member), 0, 0, cb }
 #define trans_initiator2target_initializer(member) trans_initiator2target_initializer_cb(member, NULL)
 
 #define trans_target2initiator_initializer_cb(member, cb) \
-    { &dummy, 0, 0, sizeof_member(split_shared_memory_t, member), offsetof(split_shared_memory_t, member), cb }
+    { 0, 0, sizeof_member(split_shared_memory_t, member), offsetof(split_shared_memory_t, member), cb }
 #define trans_target2initiator_initializer(member) trans_target2initiator_initializer_cb(member, NULL)
 
 #define transport_write(id, data, length) transport_execute_transaction(id, data, length, NULL, 0)


@@ 658,10 658,9 @@ static void pointing_handlers_slave(matrix_row_t master_matrix[], matrix_row_t s
 
 ////////////////////////////////////////////////////
 
-uint8_t                  dummy;
 split_transaction_desc_t split_transaction_table[NUM_TOTAL_TRANSACTIONS] = {
     // Set defaults
-    [0 ...(NUM_TOTAL_TRANSACTIONS - 1)] = {NULL, 0, 0, 0, 0, 0},
+    [0 ...(NUM_TOTAL_TRANSACTIONS - 1)] = {0, 0, 0, 0, 0},
 
 #ifdef USE_I2C
     [I2C_EXECUTE_CALLBACK] = trans_initiator2target_initializer(transaction_id),

@@ 27,7 27,6 @@ typedef void (*slave_callback_t)(uint8_t initiator2target_buffer_size, const voi
 
 // Split transaction Descriptor
 typedef struct _split_transaction_desc_t {
-    uint8_t *        status;
     uint8_t          initiator2target_buffer_size;
     uint16_t         initiator2target_offset;
     uint8_t          target2initiator_buffer_size;

@@ 99,7 99,7 @@ bool transport_execute_transaction(int8_t id, const void *initiator2target_buf, 
         memcpy(split_trans_initiator2target_buffer(trans), initiator2target_buf, len);
     }
 
-    if (soft_serial_transaction(id) != TRANSACTION_END) {
+    if (!soft_serial_transaction(id)) {
         return false;
     }