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path: root/platforms/chibios/drivers/serial_usart.c
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Diffstat (limited to 'platforms/chibios/drivers/serial_usart.c')
-rw-r--r--platforms/chibios/drivers/serial_usart.c34
1 files changed, 11 insertions, 23 deletions
diff --git a/platforms/chibios/drivers/serial_usart.c b/platforms/chibios/drivers/serial_usart.c
index 124e4be685..85c64214d1 100644
--- a/platforms/chibios/drivers/serial_usart.c
+++ b/platforms/chibios/drivers/serial_usart.c
@@ -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;
}
@@ -242,7 +238,7 @@ void soft_serial_initiator_init(void) {
usart_master_init(&serial_driver);
#if defined(MCU_STM32) && defined(SERIAL_USART_PIN_SWAP)
- serial_config.cr2 |= USART_CR2_SWAP; // master has swapped TX/RX pins
+ serial_config.cr2 |= USART_CR2_SWAP; // master has swapped TX/RX pins
#endif
sdStart(serial_driver, &serial_config);
@@ -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;
}