247 lines
8.2 KiB
C
247 lines
8.2 KiB
C
// Copyright 2021 QMK
|
|
// Copyright 2022 Stefan Kerkmann
|
|
// 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)
|
|
static QMKSerialConfig serial_config = SERIAL_USART_CONFIG;
|
|
#elif defined(MCU_STM32) /* STM32 MCUs */
|
|
static QMKSerialConfig serial_config = {
|
|
# if HAL_USE_SERIAL
|
|
.speed = (SERIAL_USART_SPEED),
|
|
# else
|
|
.baud = (SERIAL_USART_SPEED),
|
|
# endif
|
|
.cr1 = (SERIAL_USART_CR1),
|
|
.cr2 = (SERIAL_USART_CR2),
|
|
# if !defined(SERIAL_USART_FULL_DUPLEX)
|
|
.cr3 = ((SERIAL_USART_CR3) | USART_CR3_HDSEL) /* activate half-duplex mode */
|
|
# else
|
|
.cr3 = (SERIAL_USART_CR3)
|
|
# endif
|
|
};
|
|
#elif defined(MCU_RP) /* Raspberry Pi MCUs */
|
|
/* USART in 8E2 config with RX and TX FIFOs enabled. */
|
|
// clang-format off
|
|
static QMKSerialConfig serial_config = {
|
|
.baud = (SERIAL_USART_SPEED),
|
|
.UARTLCR_H = UART_UARTLCR_H_WLEN_8BITS | UART_UARTLCR_H_PEN | UART_UARTLCR_H_STP2 | UART_UARTLCR_H_FEN,
|
|
.UARTCR = 0U,
|
|
.UARTIFLS = UART_UARTIFLS_RXIFLSEL_1_8F | UART_UARTIFLS_TXIFLSEL_1_8E,
|
|
.UARTDMACR = 0U
|
|
};
|
|
// clang-format on
|
|
#else
|
|
# error MCU Familiy not supported by default, supply your own serial_config by defining SERIAL_USART_CONFIG in your keyboard files.
|
|
#endif
|
|
|
|
static QMKSerialDriver* serial_driver = (QMKSerialDriver*)&SERIAL_USART_DRIVER;
|
|
|
|
#if HAL_USE_SERIAL
|
|
|
|
/**
|
|
* @brief SERIAL Driver startup routine.
|
|
*/
|
|
static inline void usart_driver_start(void) {
|
|
sdStart(serial_driver, &serial_config);
|
|
}
|
|
|
|
inline void serial_transport_driver_clear(void) {
|
|
osalSysLock();
|
|
bool volatile queue_not_empty = !iqIsEmptyI(&serial_driver->iqueue);
|
|
osalSysUnlock();
|
|
|
|
while (queue_not_empty) {
|
|
osalSysLock();
|
|
/* Hard reset the input queue. */
|
|
iqResetI(&serial_driver->iqueue);
|
|
osalSysUnlock();
|
|
/* Allow pending interrupts to preempt.
|
|
* Do not merge the lock/unlock blocks into one
|
|
* or the code will not work properly.
|
|
* The empty read adds a tiny amount of delay. */
|
|
(void)queue_not_empty;
|
|
osalSysLock();
|
|
queue_not_empty = !iqIsEmptyI(&serial_driver->iqueue);
|
|
osalSysUnlock();
|
|
}
|
|
}
|
|
|
|
#elif HAL_USE_SIO
|
|
|
|
void clear_rx_evt_cb(SIODriver* siop) {
|
|
osalSysLockFromISR();
|
|
/* If errors occured during transactions this callback is invoked. We just
|
|
* clear the error sources and move on. We rely on the fact that we check
|
|
* for the success of the transaction by comparing the received/send bytes
|
|
* with the actual received/send bytes in the send/receive functions. */
|
|
sioGetAndClearEventsI(serial_driver);
|
|
osalSysUnlockFromISR();
|
|
}
|
|
|
|
static const SIOOperation serial_usart_operation = {.rx_cb = NULL, .rx_idle_cb = NULL, .tx_cb = NULL, .tx_end_cb = NULL, .rx_evt_cb = &clear_rx_evt_cb};
|
|
|
|
/**
|
|
* @brief SIO Driver startup routine.
|
|
*/
|
|
static inline void usart_driver_start(void) {
|
|
sioStart(serial_driver, &serial_config);
|
|
sioStartOperation(serial_driver, &serial_usart_operation);
|
|
}
|
|
|
|
inline void serial_transport_driver_clear(void) {
|
|
osalSysLock();
|
|
while (!sioIsRXEmptyX(serial_driver)) {
|
|
(void)sioGetX(serial_driver);
|
|
}
|
|
osalSysUnlock();
|
|
}
|
|
|
|
#else
|
|
|
|
# error Either the SERIAL or SIO driver has to be activated to use the usart driver for split keyboards.
|
|
|
|
#endif
|
|
|
|
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)
|
|
/* Half duplex fills the input queue with the data we wrote - just throw it away. */
|
|
if (likely(success)) {
|
|
size_t bytes_left = size;
|
|
# if HAL_USE_SERIAL
|
|
/* The SERIAL driver uses large soft FIFOs that are filled from an IRQ
|
|
* context, so there is a delay between receiving the data and it
|
|
* becoming actually available, therefore we have to apply a timeout
|
|
* mechanism. Under the right circumstances (e.g. bad cables paired with
|
|
* high baud rates) less bytes can be present in the input queue as
|
|
* well. */
|
|
uint8_t dump[64];
|
|
|
|
while (unlikely(bytes_left >= 64)) {
|
|
if (unlikely(!serial_transport_receive(dump, 64))) {
|
|
return false;
|
|
}
|
|
bytes_left -= 64;
|
|
}
|
|
|
|
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
|
|
* overflowed by a large that we just send. Therefore we attempt to read
|
|
* back all the data we send or until the FIFO runs empty in case it
|
|
* overflowed and data was truncated. */
|
|
if (unlikely(sioSynchronizeTXEnd(serial_driver, TIME_MS2I(SERIAL_USART_TIMEOUT)) < MSG_OK)) {
|
|
return false;
|
|
}
|
|
|
|
osalSysLock();
|
|
while (bytes_left > 0 && !sioIsRXEmptyX(serial_driver)) {
|
|
(void)sioGetX(serial_driver);
|
|
bytes_left--;
|
|
}
|
|
osalSysUnlock();
|
|
# endif
|
|
}
|
|
#endif
|
|
|
|
return success;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
#if !defined(SERIAL_USART_FULL_DUPLEX)
|
|
|
|
/**
|
|
* @brief Initiate pins for USART peripheral. Half-duplex configuration.
|
|
*/
|
|
__attribute__((weak)) void usart_init(void) {
|
|
# if defined(MCU_STM32) /* STM32 MCUs */
|
|
# if defined(USE_GPIOV1)
|
|
palSetLineMode(SERIAL_USART_TX_PIN, PAL_MODE_ALTERNATE_OPENDRAIN);
|
|
# else
|
|
palSetLineMode(SERIAL_USART_TX_PIN, PAL_MODE_ALTERNATE(SERIAL_USART_TX_PAL_MODE) | PAL_OUTPUT_TYPE_OPENDRAIN);
|
|
# endif
|
|
|
|
# if defined(USART_REMAP)
|
|
USART_REMAP;
|
|
# endif
|
|
# elif defined(MCU_RP) /* Raspberry Pi MCUs */
|
|
# error Half-duplex with the SIO driver is not supported due to hardware limitations on the RP2040, switch to the PIO driver which has half-duplex support.
|
|
# else
|
|
# pragma message "usart_init: MCU Familiy not supported by default, please supply your own init code by implementing usart_init() in your keyboard files."
|
|
# endif
|
|
}
|
|
|
|
#else
|
|
|
|
/**
|
|
* @brief Initiate pins for USART peripheral. Full-duplex configuration.
|
|
*/
|
|
__attribute__((weak)) void usart_init(void) {
|
|
# if defined(MCU_STM32) /* STM32 MCUs */
|
|
# if defined(USE_GPIOV1)
|
|
palSetLineMode(SERIAL_USART_TX_PIN, PAL_MODE_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_OUTPUT_TYPE_PUSHPULL | PAL_OUTPUT_SPEED_HIGHEST);
|
|
palSetLineMode(SERIAL_USART_RX_PIN, PAL_MODE_ALTERNATE(SERIAL_USART_RX_PAL_MODE) | PAL_OUTPUT_TYPE_PUSHPULL | PAL_OUTPUT_SPEED_HIGHEST);
|
|
# endif
|
|
|
|
# if defined(USART_REMAP)
|
|
USART_REMAP;
|
|
# endif
|
|
# elif defined(MCU_RP) /* Raspberry Pi MCUs */
|
|
palSetLineMode(SERIAL_USART_TX_PIN, PAL_MODE_ALTERNATE_UART);
|
|
palSetLineMode(SERIAL_USART_RX_PIN, PAL_MODE_ALTERNATE_UART);
|
|
# else
|
|
# pragma message "usart_init: MCU Familiy not supported by default, please supply your own init code by implementing usart_init() in your keyboard files."
|
|
# endif
|
|
}
|
|
|
|
#endif
|
|
|
|
/**
|
|
* @brief Overridable master specific initializations.
|
|
*/
|
|
__attribute__((weak, nonnull)) void usart_master_init(QMKSerialDriver** driver) {
|
|
(void)driver;
|
|
usart_init();
|
|
}
|
|
|
|
/**
|
|
* @brief Overridable slave specific initializations.
|
|
*/
|
|
__attribute__((weak, nonnull)) void usart_slave_init(QMKSerialDriver** driver) {
|
|
(void)driver;
|
|
usart_init();
|
|
}
|
|
|
|
void serial_transport_driver_slave_init(void) {
|
|
usart_slave_init(&serial_driver);
|
|
usart_driver_start();
|
|
}
|
|
|
|
void serial_transport_driver_master_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
|
|
#endif
|
|
|
|
usart_driver_start();
|
|
}
|