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-rw-r--r--platforms/chibios/drivers/serial.c4
-rw-r--r--platforms/chibios/drivers/serial_protocol.c164
-rw-r--r--platforms/chibios/drivers/serial_protocol.h49
-rw-r--r--platforms/chibios/drivers/serial_usart.c191
-rw-r--r--platforms/chibios/drivers/serial_usart.h81
5 files changed, 263 insertions, 226 deletions
diff --git a/platforms/chibios/drivers/serial.c b/platforms/chibios/drivers/serial.c
index 0cff057d1d..e5f346ba33 100644
--- a/platforms/chibios/drivers/serial.c
+++ b/platforms/chibios/drivers/serial.c
@@ -233,7 +233,7 @@ static inline bool initiate_transaction(uint8_t sstd_index) {
// check if the slave is present
if (serial_read_pin()) {
// slave failed to pull the line low, assume not present
- dprintf("serial::NO_RESPONSE\n");
+ serial_dprintf("serial::NO_RESPONSE\n");
chSysUnlock();
return false;
}
@@ -269,7 +269,7 @@ static inline bool initiate_transaction(uint8_t sstd_index) {
serial_delay();
if ((checksum_computed) != (checksum_received)) {
- dprintf("serial::FAIL[%u,%u,%u]\n", checksum_computed, checksum_received, sstd_index);
+ serial_dprintf("serial::FAIL[%u,%u,%u]\n", checksum_computed, checksum_received, sstd_index);
serial_output();
serial_high();
diff --git a/platforms/chibios/drivers/serial_protocol.c b/platforms/chibios/drivers/serial_protocol.c
new file mode 100644
index 0000000000..3e160e0c5c
--- /dev/null
+++ b/platforms/chibios/drivers/serial_protocol.c
@@ -0,0 +1,164 @@
+// Copyright 2022 Stefan Kerkmann
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <ch.h>
+
+#include "quantum.h"
+#include "serial.h"
+#include "serial_protocol.h"
+#include "printf.h"
+#include "synchronization_util.h"
+
+static inline bool initiate_transaction(uint8_t transaction_id);
+static inline bool react_to_transaction(void);
+
+/**
+ * @brief This thread runs on the slave and responds to transactions initiated
+ * by the master.
+ */
+static THD_WORKING_AREA(waSlaveThread, 1024);
+static THD_FUNCTION(SlaveThread, arg) {
+ (void)arg;
+ chRegSetThreadName("split_protocol_tx_rx");
+
+ while (true) {
+ split_shared_memory_lock();
+ if (unlikely(!react_to_transaction())) {
+ /* Clear the receive queue, to start with a clean slate.
+ * Parts of failed transactions or spurious bytes could still be in it. */
+ serial_transport_driver_clear();
+ }
+ split_shared_memory_unlock();
+ }
+}
+
+/**
+ * @brief Slave specific initializations.
+ */
+void soft_serial_target_init(void) {
+ serial_transport_driver_slave_init();
+
+ /* Start transport thread. */
+ chThdCreateStatic(waSlaveThread, sizeof(waSlaveThread), HIGHPRIO, SlaveThread, NULL);
+}
+
+/**
+ * @brief Master specific initializations.
+ */
+void soft_serial_initiator_init(void) {
+ serial_transport_driver_master_init();
+}
+
+/**
+ * @brief React to transactions started by the master.
+ */
+static inline bool react_to_transaction(void) {
+ uint8_t transaction_id = 0;
+ /* Wait until there is a transaction for us. */
+ if (unlikely(!serial_transport_receive_blocking(&transaction_id, sizeof(transaction_id)))) {
+ return false;
+ }
+
+ /* Sanity check that we are actually responding to a valid transaction. */
+ if (unlikely(transaction_id >= NUM_TOTAL_TRANSACTIONS)) {
+ return false;
+ }
+
+ split_transaction_desc_t* transaction = &split_transaction_table[transaction_id];
+
+ /* Send back the handshake which is XORed as a simple checksum,
+ to signal that the slave is ready to receive possible transaction buffers */
+ transaction_id ^= NUM_TOTAL_TRANSACTIONS;
+ if (unlikely(!serial_transport_send(&transaction_id, sizeof(transaction_id)))) {
+ return false;
+ }
+
+ /* Receive transaction buffer from the master. If this transaction requires it.*/
+ if (transaction->initiator2target_buffer_size) {
+ if (unlikely(!serial_transport_receive(split_trans_initiator2target_buffer(transaction), transaction->initiator2target_buffer_size))) {
+ return false;
+ }
+ }
+
+ /* Allow any slave processing to occur. */
+ if (transaction->slave_callback) {
+ transaction->slave_callback(transaction->initiator2target_buffer_size, split_trans_initiator2target_buffer(transaction), transaction->initiator2target_buffer_size, split_trans_target2initiator_buffer(transaction));
+ }
+
+ /* Send transaction buffer to the master. If this transaction requires it. */
+ if (transaction->target2initiator_buffer_size) {
+ if (unlikely(!serial_transport_send(split_trans_target2initiator_buffer(transaction), transaction->target2initiator_buffer_size))) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+/**
+ * @brief Start transaction from the master half to the slave half.
+ *
+ * @param index Transaction Table index of the transaction to start.
+ * @return bool Indicates success of transaction.
+ */
+bool soft_serial_transaction(int index) {
+ split_shared_memory_lock();
+ bool result = initiate_transaction((uint8_t)index);
+ split_shared_memory_unlock();
+
+ if (unlikely(!result)) {
+ /* Clear the receive queue, to start with a clean slate.
+ * Parts of failed transactions or spurious bytes could still be in it. */
+ serial_transport_driver_clear();
+ }
+
+ return result;
+}
+
+/**
+ * @brief Initiate transaction to slave half.
+ */
+static inline bool initiate_transaction(uint8_t transaction_id) {
+ /* Sanity check that we are actually starting a valid transaction. */
+ if (unlikely(transaction_id >= NUM_TOTAL_TRANSACTIONS)) {
+ serial_dprintf("SPLIT: illegal transaction id\n");
+ return false;
+ }
+
+ split_transaction_desc_t* transaction = &split_transaction_table[transaction_id];
+
+ /* Send transaction table index to the slave, which doubles as basic handshake token. */
+ if (unlikely(!serial_transport_send(&transaction_id, sizeof(transaction_id)))) {
+ serial_dprintf("SPLIT: sending handshake failed\n");
+ return false;
+ }
+
+ uint8_t transaction_id_shake = 0xFF;
+
+ /* Which we always read back first so that we can error out correctly.
+ * - due to the half duplex limitations on return codes, we always have to read *something*.
+ * - without the read, write only transactions *always* succeed, even during the boot process where the slave is not ready.
+ */
+ if (unlikely(!serial_transport_receive(&transaction_id_shake, sizeof(transaction_id_shake)) || (transaction_id_shake != (transaction_id ^ NUM_TOTAL_TRANSACTIONS)))) {
+ serial_dprintf("SPLIT: receiving handshake failed\n");
+ return false;
+ }
+
+ /* Send transaction buffer to the slave. If this transaction requires it. */
+ if (transaction->initiator2target_buffer_size) {
+ if (unlikely(!serial_transport_send(split_trans_initiator2target_buffer(transaction), transaction->initiator2target_buffer_size))) {
+ serial_dprintf("SPLIT: sending buffer failed\n");
+ return false;
+ }
+ }
+
+ /* Receive transaction buffer from the slave. If this transaction requires it. */
+ if (transaction->target2initiator_buffer_size) {
+ if (unlikely(!serial_transport_receive(split_trans_target2initiator_buffer(transaction), transaction->target2initiator_buffer_size))) {
+ serial_dprintf("SPLIT: receiving buffer failed\n");
+ return false;
+ }
+ }
+
+ return true;
+}
diff --git a/platforms/chibios/drivers/serial_protocol.h b/platforms/chibios/drivers/serial_protocol.h
new file mode 100644
index 0000000000..4275a7f8d8
--- /dev/null
+++ b/platforms/chibios/drivers/serial_protocol.h
@@ -0,0 +1,49 @@
+// Copyright 2022 Stefan Kerkmann
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+#pragma once
+
+/**
+ * @brief Clears any intermediate sending or receiving state of the driver to a known good
+ * state. This happens after errors in the middle of transactions, to start with
+ * a clean slate.
+ */
+void serial_transport_driver_clear(void);
+
+/**
+ * @brief Driver specific initialization on the slave half.
+ */
+void serial_transport_driver_slave_init(void);
+
+/**
+ * @brief Driver specific specific initialization on the master half.
+ */
+void serial_transport_driver_master_init(void);
+
+/**
+ * @brief Blocking receive of size * bytes.
+ *
+ * @return true Receive success.
+ * @return false Receive failed, e.g. by bit errors.
+ */
+bool __attribute__((nonnull, hot)) serial_transport_receive(uint8_t* destination, const size_t size);
+
+/**
+ * @brief Blocking receive of size * bytes with an implicitly defined timeout.
+ *
+ * @return true Receive success.
+ * @return false Receive failed, e.g. by timeout or bit errors.
+ */
+bool __attribute__((nonnull, hot)) serial_transport_receive_blocking(uint8_t* destination, const size_t size);
+
+/**
+ * @brief Blocking send of buffer with timeout.
+ *
+ * @return true Send success.
+ * @return false Send failed, e.g. by timeout or bit errors.
+ */
+bool __attribute__((nonnull, hot)) serial_transport_send(const uint8_t* source, const size_t size);
diff --git a/platforms/chibios/drivers/serial_usart.c b/platforms/chibios/drivers/serial_usart.c
index 7ea25d005b..f76afb5db4 100644
--- a/platforms/chibios/drivers/serial_usart.c
+++ b/platforms/chibios/drivers/serial_usart.c
@@ -3,6 +3,7 @@
// SPDX-License-Identifier: GPL-2.0-or-later
#include "serial_usart.h"
+#include "serial_protocol.h"
#include "synchronization_util.h"
#if defined(SERIAL_USART_CONFIG)
@@ -26,14 +27,6 @@ static QMKSerialConfig serial_config = {
static QMKSerialDriver* serial_driver = (QMKSerialDriver*)&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)) receive_blocking(uint8_t* destination, const size_t size);
-static inline bool __attribute__((nonnull)) send(const uint8_t* source, const size_t size);
-static inline bool initiate_transaction(uint8_t sstd_index);
-static inline void usart_clear(void);
-static inline void usart_driver_start(void);
-
#if HAL_USE_SERIAL
/**
@@ -43,10 +36,7 @@ static inline void usart_driver_start(void) {
sdStart(serial_driver, &serial_config);
}
-/**
- * @brief Clear the receive input queue.
- */
-static inline void usart_clear(void) {
+inline void serial_transport_driver_clear(void) {
osalSysLock();
bool volatile queue_not_empty = !iqIsEmptyI(&serial_driver->iqueue);
osalSysUnlock();
@@ -89,10 +79,7 @@ static inline void usart_driver_start(void) {
sioStartOperation(serial_driver, &serial_usart_operation);
}
-/**
- * @brief Clear the receive input queue, as some MCUs have built-in hardware FIFOs.
- */
-static inline void usart_clear(void) {
+inline void serial_transport_driver_clear(void) {
osalSysLock();
while (!sioIsRXEmptyX(serial_driver)) {
(void)sioGetX(serial_driver);
@@ -106,13 +93,7 @@ static inline void usart_clear(void) {
#endif
-/**
- * @brief Blocking send of buffer with timeout.
- *
- * @return true Send success.
- * @return false Send failed.
- */
-static inline bool send(const uint8_t* source, const size_t size) {
+inline bool serial_transport_send(const uint8_t* source, const size_t size) {
bool success = (size_t)chnWriteTimeout(serial_driver, source, size, TIME_MS2I(SERIAL_USART_TIMEOUT)) == size;
#if !defined(SERIAL_USART_FULL_DUPLEX)
@@ -129,13 +110,13 @@ static inline bool send(const uint8_t* source, const size_t size) {
uint8_t dump[64];
while (unlikely(bytes_left >= 64)) {
- if (unlikely(!receive(dump, 64))) {
+ if (unlikely(!serial_transport_receive(dump, 64))) {
return false;
}
bytes_left -= 64;
}
- return receive(dump, bytes_left);
+ return serial_transport_receive(dump, bytes_left);
# else
/* The SIO driver directly accesses the hardware FIFOs of the USART
* peripheral. As these are limited in depth, the RX FIFO might have been
@@ -159,24 +140,12 @@ static inline bool send(const uint8_t* source, const size_t size) {
return success;
}
-/**
- * @brief Blocking receive of size * bytes with timeout.
- *
- * @return true Receive success.
- * @return false Receive failed, e.g. by timeout.
- */
-static inline bool receive(uint8_t* destination, const size_t size) {
+inline bool serial_transport_receive(uint8_t* destination, const size_t size) {
bool success = (size_t)chnReadTimeout(serial_driver, destination, size, TIME_MS2I(SERIAL_USART_TIMEOUT)) == size;
return success;
}
-/**
- * @brief Blocking receive of size * bytes.
- *
- * @return true Receive success.
- * @return false Receive failed.
- */
-static inline bool receive_blocking(uint8_t* destination, const size_t size) {
+inline bool serial_transport_receive_blocking(uint8_t* destination, const size_t size) {
bool success = (size_t)chnRead(serial_driver, destination, size) == size;
return success;
}
@@ -243,86 +212,12 @@ __attribute__((weak, nonnull)) void usart_slave_init(QMKSerialDriver** driver) {
usart_init();
}
-/**
- * @brief This thread runs on the slave and responds to transactions initiated
- * by the master.
- */
-static THD_WORKING_AREA(waSlaveThread, 1024);
-static THD_FUNCTION(SlaveThread, arg) {
- (void)arg;
- chRegSetThreadName("usart_tx_rx");
-
- while (true) {
- if (unlikely(!react_to_transactions())) {
- /* Clear the receive queue, to start with a clean slate.
- * Parts of failed transactions or spurious bytes could still be in it. */
- usart_clear();
- }
- split_shared_memory_unlock();
- }
-}
-
-/**
- * @brief Slave specific initializations.
- */
-void soft_serial_target_init(void) {
+void serial_transport_driver_slave_init(void) {
usart_slave_init(&serial_driver);
-
usart_driver_start();
-
- /* Start transport thread. */
- chThdCreateStatic(waSlaveThread, sizeof(waSlaveThread), HIGHPRIO, SlaveThread, NULL);
-}
-
-/**
- * @brief React to transactions started by the master.
- */
-static inline bool react_to_transactions(void) {
- /* Wait until there is a transaction for us. */
- uint8_t sstd_index = 0;
- receive_blocking(&sstd_index, sizeof(sstd_index));
-
- /* Sanity check that we are actually responding to a valid transaction. */
- if (unlikely(sstd_index >= NUM_TOTAL_TRANSACTIONS)) {
- return false;
- }
-
- split_shared_memory_lock();
- split_transaction_desc_t* trans = &split_transaction_table[sstd_index];
-
- /* Send back the handshake which is XORed as a simple checksum,
- to signal that the slave is ready to receive possible transaction buffers */
- sstd_index ^= HANDSHAKE_MAGIC;
- if (unlikely(!send(&sstd_index, sizeof(sstd_index)))) {
- return false;
- }
-
- /* Receive transaction buffer from the master. If this transaction requires it.*/
- if (trans->initiator2target_buffer_size) {
- if (unlikely(!receive(split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size))) {
- return false;
- }
- }
-
- /* Allow any slave processing to occur. */
- if (trans->slave_callback) {
- trans->slave_callback(trans->initiator2target_buffer_size, split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size, split_trans_target2initiator_buffer(trans));
- }
-
- /* Send transaction buffer to the master. If this transaction requires it. */
- if (trans->target2initiator_buffer_size) {
- if (unlikely(!send(split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size))) {
- return false;
- }
- }
-
- return true;
}
-/**
- * @brief Master specific initializations.
- */
-void soft_serial_initiator_init(void) {
+void serial_transport_driver_master_init(void) {
usart_master_init(&serial_driver);
#if defined(MCU_STM32) && defined(SERIAL_USART_PIN_SWAP)
@@ -331,69 +226,3 @@ void soft_serial_initiator_init(void) {
usart_driver_start();
}
-
-/**
- * @brief Start transaction from the master half to the slave half.
- *
- * @param index Transaction Table index of the transaction to start.
- * @return bool Indicates success of transaction.
- */
-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();
-
- split_shared_memory_lock();
- bool result = initiate_transaction((uint8_t)index);
- split_shared_memory_unlock();
-
- return result;
-}
-
-/**
- * @brief Initiate transaction to slave half.
- */
-static inline bool initiate_transaction(uint8_t sstd_index) {
- /* Sanity check that we are actually starting a valid transaction. */
- if (unlikely(sstd_index >= NUM_TOTAL_TRANSACTIONS)) {
- dprintln("USART: Illegal transaction Id.");
- return false;
- }
-
- split_transaction_desc_t* trans = &split_transaction_table[sstd_index];
-
- /* Send transaction table index to the slave, which doubles as basic handshake token. */
- if (unlikely(!send(&sstd_index, sizeof(sstd_index)))) {
- dprintln("USART: Send Handshake failed.");
- return false;
- }
-
- uint8_t sstd_index_shake = 0xFF;
-
- /* Which we always read back first so that we can error out correctly.
- * - due to the half duplex limitations on return codes, we always have to read *something*.
- * - without the read, write only transactions *always* succeed, even during the boot process where the slave is not ready.
- */
- if (unlikely(!receive(&sstd_index_shake, sizeof(sstd_index_shake)) || (sstd_index_shake != (sstd_index ^ HANDSHAKE_MAGIC)))) {
- dprintln("USART: Handshake failed.");
- return false;
- }
-
- /* Send transaction buffer to the slave. If this transaction requires it. */
- if (trans->initiator2target_buffer_size) {
- if (unlikely(!send(split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size))) {
- dprintln("USART: Send failed.");
- return false;
- }
- }
-
- /* Receive transaction buffer from the slave. If this transaction requires it. */
- if (trans->target2initiator_buffer_size) {
- if (unlikely(!receive(split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size))) {
- dprintln("USART: Receive failed.");
- return false;
- }
- }
-
- return true;
-}
diff --git a/platforms/chibios/drivers/serial_usart.h b/platforms/chibios/drivers/serial_usart.h
index 98c634dac0..fa062cd736 100644
--- a/platforms/chibios/drivers/serial_usart.h
+++ b/platforms/chibios/drivers/serial_usart.h
@@ -5,11 +5,46 @@
#include "quantum.h"
#include "serial.h"
-#include "printf.h"
-
-#include <ch.h>
#include <hal.h>
+#if defined(SOFT_SERIAL_PIN)
+# define SERIAL_USART_TX_PIN SOFT_SERIAL_PIN
+#endif
+
+#if !defined(SERIAL_USART_TX_PIN)
+# define SERIAL_USART_TX_PIN A9
+#endif
+
+#if !defined(SERIAL_USART_RX_PIN)
+# define SERIAL_USART_RX_PIN A10
+#endif
+
+#if !defined(SELECT_SOFT_SERIAL_SPEED)
+# define SELECT_SOFT_SERIAL_SPEED 1
+#endif
+
+#if defined(SERIAL_USART_SPEED)
+// Allow advanced users to directly set SERIAL_USART_SPEED
+#elif SELECT_SOFT_SERIAL_SPEED == 0
+# define SERIAL_USART_SPEED 460800
+#elif SELECT_SOFT_SERIAL_SPEED == 1
+# define SERIAL_USART_SPEED 230400
+#elif SELECT_SOFT_SERIAL_SPEED == 2
+# define SERIAL_USART_SPEED 115200
+#elif SELECT_SOFT_SERIAL_SPEED == 3
+# define SERIAL_USART_SPEED 57600
+#elif SELECT_SOFT_SERIAL_SPEED == 4
+# define SERIAL_USART_SPEED 38400
+#elif SELECT_SOFT_SERIAL_SPEED == 5
+# define SERIAL_USART_SPEED 19200
+#else
+# error invalid SELECT_SOFT_SERIAL_SPEED value
+#endif
+
+#if !defined(SERIAL_USART_TIMEOUT)
+# define SERIAL_USART_TIMEOUT 20
+#endif
+
#if HAL_USE_SERIAL
typedef SerialDriver QMKSerialDriver;
@@ -40,18 +75,6 @@ typedef SIOConfig QMKSerialConfig;
# endif
#endif
-#if defined(SOFT_SERIAL_PIN)
-# define SERIAL_USART_TX_PIN SOFT_SERIAL_PIN
-#endif
-
-#if !defined(SERIAL_USART_TX_PIN)
-# define SERIAL_USART_TX_PIN A9
-#endif
-
-#if !defined(SERIAL_USART_RX_PIN)
-# define SERIAL_USART_RX_PIN A10
-#endif
-
#if !defined(USART_CR1_M0)
# define USART_CR1_M0 USART_CR1_M // some platforms (f1xx) dont have this so
#endif
@@ -89,31 +112,3 @@ typedef SIOConfig QMKSerialConfig;
(AFIO->MAPR |= AFIO_MAPR_USART3_REMAP_FULLREMAP); \
} while (0)
#endif
-
-#if !defined(SELECT_SOFT_SERIAL_SPEED)
-# define SELECT_SOFT_SERIAL_SPEED 1
-#endif
-
-#if defined(SERIAL_USART_SPEED)
-// Allow advanced users to directly set SERIAL_USART_SPEED
-#elif SELECT_SOFT_SERIAL_SPEED == 0
-# define SERIAL_USART_SPEED 460800
-#elif SELECT_SOFT_SERIAL_SPEED == 1
-# define SERIAL_USART_SPEED 230400
-#elif SELECT_SOFT_SERIAL_SPEED == 2
-# define SERIAL_USART_SPEED 115200
-#elif SELECT_SOFT_SERIAL_SPEED == 3
-# define SERIAL_USART_SPEED 57600
-#elif SELECT_SOFT_SERIAL_SPEED == 4
-# define SERIAL_USART_SPEED 38400
-#elif SELECT_SOFT_SERIAL_SPEED == 5
-# define SERIAL_USART_SPEED 19200
-#else
-# error invalid SELECT_SOFT_SERIAL_SPEED value
-#endif
-
-#if !defined(SERIAL_USART_TIMEOUT)
-# define SERIAL_USART_TIMEOUT 20
-#endif
-
-#define HANDSHAKE_MAGIC 7U
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 15:21:41 +0000