diff options
Diffstat (limited to 'drivers/chibios/serial_usart_duplex.c')
| -rw-r--r-- | drivers/chibios/serial_usart_duplex.c | 261 |
1 files changed, 0 insertions, 261 deletions
diff --git a/drivers/chibios/serial_usart_duplex.c b/drivers/chibios/serial_usart_duplex.c deleted file mode 100644 index cc9b889ac2..0000000000 --- a/drivers/chibios/serial_usart_duplex.c +++ /dev/null @@ -1,261 +0,0 @@ -/* Copyright 2021 QMK - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include "serial_usart.h" - -#include <stdatomic.h> - -#if !defined(USE_GPIOV1) -// The default PAL alternate modes are used to signal that the pins are used for USART -# if !defined(SERIAL_USART_TX_PAL_MODE) -# define SERIAL_USART_TX_PAL_MODE 7 -# endif -# if !defined(SERIAL_USART_RX_PAL_MODE) -# define SERIAL_USART_RX_PAL_MODE 7 -# endif -#endif - -#if !defined(SERIAL_USART_DRIVER) -# define SERIAL_USART_DRIVER UARTD1 -#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 - -#define SIGNAL_HANDSHAKE_RECEIVED 0x1 - -void handle_transactions_slave(uint8_t sstd_index); -static void receive_transaction_handshake(UARTDriver* uartp, uint16_t received_handshake); - -/* - * UART driver configuration structure. We use the blocking DMA enabled API and - * the rxchar callback to receive handshake tokens but only on the slave halve. - */ -// clang-format off -static UARTConfig uart_config = { - .txend1_cb = NULL, - .txend2_cb = NULL, - .rxend_cb = NULL, - .rxchar_cb = NULL, - .rxerr_cb = NULL, - .timeout_cb = NULL, - .speed = (SERIAL_USART_SPEED), - .cr1 = (SERIAL_USART_CR1), - .cr2 = (SERIAL_USART_CR2), - .cr3 = (SERIAL_USART_CR3) -}; -// clang-format on - -static SSTD_t* Transaction_table = NULL; -static uint8_t Transaction_table_size = 0; -static atomic_uint_least8_t handshake = 0xFF; -static thread_reference_t tp_target = NULL; - -/* - * This callback is invoked when a character is received but the application - * was not ready to receive it, the character is passed as parameter. - * Receive transaction table index from initiator, which doubles as basic handshake token. */ -static void receive_transaction_handshake(UARTDriver* uartp, uint16_t received_handshake) { - /* Check if received handshake is not a valid transaction id. - * Please note that we can still catch a seemingly valid handshake - * i.e. a byte from a ongoing transfer which is in the allowed range. - * So this check mainly prevents any obviously wrong handshakes and - * subsequent wakeups of the receiving thread, which is a costly operation. */ - if (received_handshake > Transaction_table_size) { - return; - } - - handshake = (uint8_t)received_handshake; - chSysLockFromISR(); - /* Wakeup receiving thread to start a transaction. */ - chEvtSignalI(tp_target, (eventmask_t)SIGNAL_HANDSHAKE_RECEIVED); - chSysUnlockFromISR(); -} - -__attribute__((weak)) void usart_init(void) { -#if defined(USE_GPIOV1) - palSetLineMode(SERIAL_USART_TX_PIN, PAL_MODE_STM32_ALTERNATE_PUSHPULL); - palSetLineMode(SERIAL_USART_RX_PIN, PAL_MODE_INPUT); -#else - palSetLineMode(SERIAL_USART_TX_PIN, PAL_MODE_ALTERNATE(SERIAL_USART_TX_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST); - palSetLineMode(SERIAL_USART_RX_PIN, PAL_MODE_ALTERNATE(SERIAL_USART_RX_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST); -#endif -} - -/* - * This thread runs on the slave half and reacts to transactions initiated from the master. - */ -static THD_WORKING_AREA(waSlaveThread, 1024); -static THD_FUNCTION(SlaveThread, arg) { - (void)arg; - chRegSetThreadName("slave_usart_tx_rx"); - - while (true) { - /* We sleep as long as there is no handshake waiting for us. */ - chEvtWaitAny((eventmask_t)SIGNAL_HANDSHAKE_RECEIVED); - handle_transactions_slave(handshake); - } -} - -void soft_serial_target_init(SSTD_t* const sstd_table, int sstd_table_size) { - Transaction_table = sstd_table; - Transaction_table_size = (uint8_t)sstd_table_size; - usart_init(); - -#if defined(USART_REMAP) - USART_REMAP; -#endif - - tp_target = chThdCreateStatic(waSlaveThread, sizeof(waSlaveThread), HIGHPRIO, SlaveThread, NULL); - - // Start receiving handshake tokens on slave halve - uart_config.rxchar_cb = receive_transaction_handshake; - uartStart(&SERIAL_USART_DRIVER, &uart_config); -} - -/** - * @brief React to transactions started by the master. - * This version uses duplex send and receive usart pheriphals and DMA backed transfers. - */ -void inline handle_transactions_slave(uint8_t sstd_index) { - size_t buffer_size = 0; - msg_t msg = 0; - SSTD_t* trans = &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; - buffer_size = (size_t)sizeof(sstd_index); - msg = uartSendTimeout(&SERIAL_USART_DRIVER, &buffer_size, &sstd_index, TIME_MS2I(SERIAL_USART_TIMEOUT)); - - if (msg != MSG_OK) { - if (trans->status) { - *trans->status = TRANSACTION_NO_RESPONSE; - } - return; - } - - /* Receive transaction buffer from the master. If this transaction requires it.*/ - buffer_size = (size_t)trans->initiator2target_buffer_size; - if (buffer_size) { - msg = uartReceiveTimeout(&SERIAL_USART_DRIVER, &buffer_size, trans->initiator2target_buffer, TIME_MS2I(SERIAL_USART_TIMEOUT)); - if (msg != MSG_OK) { - if (trans->status) { - *trans->status = TRANSACTION_NO_RESPONSE; - } - return; - } - } - - /* Send transaction buffer to the master. If this transaction requires it. */ - buffer_size = (size_t)trans->target2initiator_buffer_size; - if (buffer_size) { - msg = uartSendFullTimeout(&SERIAL_USART_DRIVER, &buffer_size, trans->target2initiator_buffer, TIME_MS2I(SERIAL_USART_TIMEOUT)); - if (msg != MSG_OK) { - if (trans->status) { - *trans->status = TRANSACTION_NO_RESPONSE; - } - return; - } - } - - if (trans->status) { - *trans->status = TRANSACTION_ACCEPTED; - } -} - -void soft_serial_initiator_init(SSTD_t* const sstd_table, int sstd_table_size) { - Transaction_table = sstd_table; - Transaction_table_size = (uint8_t)sstd_table_size; - usart_init(); - -#if defined(SERIAL_USART_PIN_SWAP) - uart_config.cr2 |= USART_CR2_SWAP; // master has swapped TX/RX pins -#endif - -#if defined(USART_REMAP) - USART_REMAP; -#endif - - uartStart(&SERIAL_USART_DRIVER, &uart_config); -} - -/** - * @brief Start transaction from the master to the slave. - * This version uses duplex send and receive usart pheriphals and DMA backed transfers. - * - * @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. - */ -#if !defined(SERIAL_USE_MULTI_TRANSACTION) -int soft_serial_transaction(void) { - uint8_t sstd_index = 0; -#else -int soft_serial_transaction(int index) { - uint8_t sstd_index = index; -#endif - - if (sstd_index > Transaction_table_size) { - return TRANSACTION_TYPE_ERROR; - } - - SSTD_t* const trans = &Transaction_table[sstd_index]; - msg_t msg = 0; - size_t buffer_size = (size_t)sizeof(sstd_index); - - /* Send transaction table index to the slave, which doubles as basic handshake token. */ - uartSendFullTimeout(&SERIAL_USART_DRIVER, &buffer_size, &sstd_index, TIME_MS2I(SERIAL_USART_TIMEOUT)); - - uint8_t sstd_index_shake = 0xFF; - buffer_size = (size_t)sizeof(sstd_index_shake); - - /* Receive the handshake token from the slave. The token was XORed by the slave as a simple checksum. - If the tokens match, the master will start to send and receive possible transaction buffers. */ - msg = uartReceiveTimeout(&SERIAL_USART_DRIVER, &buffer_size, &sstd_index_shake, TIME_MS2I(SERIAL_USART_TIMEOUT)); - if (msg != MSG_OK || (sstd_index_shake != (sstd_index ^ HANDSHAKE_MAGIC))) { - dprintln("USART: Handshake Failed"); - return TRANSACTION_NO_RESPONSE; - } - - /* Send transaction buffer to the slave. If this transaction requires it. */ - buffer_size = (size_t)trans->initiator2target_buffer_size; - if (buffer_size) { - msg = uartSendFullTimeout(&SERIAL_USART_DRIVER, &buffer_size, trans->initiator2target_buffer, TIME_MS2I(SERIAL_USART_TIMEOUT)); - if (msg != MSG_OK) { - dprintln("USART: Send Failed"); - return TRANSACTION_NO_RESPONSE; - } - } - - /* Receive transaction buffer from the slave. If this transaction requires it. */ - buffer_size = (size_t)trans->target2initiator_buffer_size; - if (buffer_size) { - msg = uartReceiveTimeout(&SERIAL_USART_DRIVER, &buffer_size, trans->target2initiator_buffer, TIME_MS2I(SERIAL_USART_TIMEOUT)); - if (msg != MSG_OK) { - dprintln("USART: Receive Failed"); - return TRANSACTION_NO_RESPONSE; - } - } - - return TRANSACTION_END; -} |