diff options
Diffstat (limited to 'drivers/chibios/serial_usart.c')
| -rw-r--r-- | drivers/chibios/serial_usart.c | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/drivers/chibios/serial_usart.c b/drivers/chibios/serial_usart.c deleted file mode 100644 index cae29388c3..0000000000 --- a/drivers/chibios/serial_usart.c +++ /dev/null @@ -1,208 +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" - -#ifndef USE_GPIOV1 -// The default PAL alternate modes are used to signal that the pins are used for USART -# ifndef SERIAL_USART_TX_PAL_MODE -# define SERIAL_USART_TX_PAL_MODE 7 -# endif -#endif - -#ifndef SERIAL_USART_DRIVER -# define SERIAL_USART_DRIVER SD1 -#endif - -#ifdef SOFT_SERIAL_PIN -# define SERIAL_USART_TX_PIN SOFT_SERIAL_PIN -#endif - -static inline msg_t sdWriteHalfDuplex(SerialDriver* driver, uint8_t* data, uint8_t size) { - msg_t ret = sdWrite(driver, data, size); - - // Half duplex requires us to read back the data we just wrote - just throw it away - uint8_t dump[size]; - sdRead(driver, dump, size); - - return ret; -} -#undef sdWrite -#define sdWrite sdWriteHalfDuplex - -static inline msg_t sdWriteTimeoutHalfDuplex(SerialDriver* driver, uint8_t* data, uint8_t size, uint32_t timeout) { - msg_t ret = sdWriteTimeout(driver, data, size, timeout); - - // Half duplex requires us to read back the data we just wrote - just throw it away - uint8_t dump[size]; - sdReadTimeout(driver, dump, size, timeout); - - return ret; -} -#undef sdWriteTimeout -#define sdWriteTimeout sdWriteTimeoutHalfDuplex - -static inline void sdClear(SerialDriver* driver) { - while (sdGetTimeout(driver, TIME_IMMEDIATE) != MSG_TIMEOUT) { - // Do nothing with the data - } -} - -static SerialConfig sdcfg = { - (SERIAL_USART_SPEED), // speed - mandatory - (SERIAL_USART_CR1), // CR1 - (SERIAL_USART_CR2), // CR2 - (SERIAL_USART_CR3) // CR3 -}; - -void handle_soft_serial_slave(void); - -/* - * This thread runs on the slave and responds to transactions initiated - * by the master - */ -static THD_WORKING_AREA(waSlaveThread, 2048); -static THD_FUNCTION(SlaveThread, arg) { - (void)arg; - chRegSetThreadName("slave_transport"); - - while (true) { - handle_soft_serial_slave(); - } -} - -__attribute__((weak)) void usart_init(void) { -#if defined(USE_GPIOV1) - palSetLineMode(SERIAL_USART_TX_PIN, PAL_MODE_STM32_ALTERNATE_OPENDRAIN); -#else - palSetLineMode(SERIAL_USART_TX_PIN, PAL_MODE_ALTERNATE(SERIAL_USART_TX_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN); -#endif - -#if defined(USART_REMAP) - USART_REMAP; -#endif -} - -void usart_master_init(void) { - usart_init(); - - sdcfg.cr3 |= USART_CR3_HDSEL; - sdStart(&SERIAL_USART_DRIVER, &sdcfg); -} - -void usart_slave_init(void) { - usart_init(); - - sdcfg.cr3 |= USART_CR3_HDSEL; - sdStart(&SERIAL_USART_DRIVER, &sdcfg); - - // Start transport thread - chThdCreateStatic(waSlaveThread, sizeof(waSlaveThread), HIGHPRIO, SlaveThread, NULL); -} - -static SSTD_t* Transaction_table = NULL; -static uint8_t Transaction_table_size = 0; - -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; - - usart_master_init(); -} - -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; - - usart_slave_init(); -} - -void handle_soft_serial_slave(void) { - uint8_t sstd_index = sdGet(&SERIAL_USART_DRIVER); // first chunk is always transaction id - SSTD_t* trans = &Transaction_table[sstd_index]; - - // Always write back the sstd_index as part of a basic handshake - sstd_index ^= HANDSHAKE_MAGIC; - sdWrite(&SERIAL_USART_DRIVER, &sstd_index, sizeof(sstd_index)); - - if (trans->initiator2target_buffer_size) { - sdRead(&SERIAL_USART_DRIVER, trans->initiator2target_buffer, trans->initiator2target_buffer_size); - } - - if (trans->target2initiator_buffer_size) { - sdWrite(&SERIAL_USART_DRIVER, trans->target2initiator_buffer, trans->target2initiator_buffer_size); - } - - if (trans->status) { - *trans->status = TRANSACTION_ACCEPTED; - } -} - -///////// -// start transaction by initiator -// -// int soft_serial_transaction(int sstd_index) -// -// Returns: -// TRANSACTION_END -// TRANSACTION_NO_RESPONSE -// TRANSACTION_DATA_ERROR -#ifndef 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* trans = &Transaction_table[sstd_index]; - msg_t res = 0; - - sdClear(&SERIAL_USART_DRIVER); - - // First chunk is always transaction id - sdWriteTimeout(&SERIAL_USART_DRIVER, &sstd_index, sizeof(sstd_index), TIME_MS2I(SERIAL_USART_TIMEOUT)); - - 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 - res = sdReadTimeout(&SERIAL_USART_DRIVER, &sstd_index_shake, sizeof(sstd_index_shake), TIME_MS2I(SERIAL_USART_TIMEOUT)); - if (res < 0 || (sstd_index_shake != (sstd_index ^ HANDSHAKE_MAGIC))) { - dprintf("serial::usart_shake NO_RESPONSE\n"); - return TRANSACTION_NO_RESPONSE; - } - - if (trans->initiator2target_buffer_size) { - res = sdWriteTimeout(&SERIAL_USART_DRIVER, trans->initiator2target_buffer, trans->initiator2target_buffer_size, TIME_MS2I(SERIAL_USART_TIMEOUT)); - if (res < 0) { - dprintf("serial::usart_transmit NO_RESPONSE\n"); - return TRANSACTION_NO_RESPONSE; - } - } - - if (trans->target2initiator_buffer_size) { - res = sdReadTimeout(&SERIAL_USART_DRIVER, trans->target2initiator_buffer, trans->target2initiator_buffer_size, TIME_MS2I(SERIAL_USART_TIMEOUT)); - if (res < 0) { - dprintf("serial::usart_receive NO_RESPONSE\n"); - return TRANSACTION_NO_RESPONSE; - } - } - - return TRANSACTION_END; -} |