15b8a03de9
This makes the HardwareSerial behavior match that of SerialUSB, and should help avoid confusion. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
138 lines
4.1 KiB
C++
138 lines
4.1 KiB
C++
/******************************************************************************
|
|
* The MIT License
|
|
*
|
|
* Copyright (c) 2010 Perry Hung.
|
|
* Copyright (c) 2011, 2012 LeafLabs, LLC.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person
|
|
* obtaining a copy of this software and associated documentation
|
|
* files (the "Software"), to deal in the Software without
|
|
* restriction, including without limitation the rights to use, copy,
|
|
* modify, merge, publish, distribute, sublicense, and/or sell copies
|
|
* of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*****************************************************************************/
|
|
|
|
/**
|
|
* @file wirish/HardwareSerial.cpp
|
|
* @brief Wirish serial port implementation.
|
|
*/
|
|
|
|
#include <wirish/HardwareSerial.h>
|
|
|
|
#include <libmaple/libmaple.h>
|
|
#include <libmaple/gpio.h>
|
|
#include <libmaple/timer.h>
|
|
#include <libmaple/usart.h>
|
|
|
|
#define DEFINE_HWSERIAL(name, n) \
|
|
HardwareSerial name(USART##n, \
|
|
BOARD_USART##n##_TX_PIN, \
|
|
BOARD_USART##n##_RX_PIN)
|
|
|
|
#if BOARD_HAVE_USART1
|
|
DEFINE_HWSERIAL(Serial1, 1);
|
|
#endif
|
|
#if BOARD_HAVE_USART2
|
|
DEFINE_HWSERIAL(Serial2, 2);
|
|
#endif
|
|
#if BOARD_HAVE_USART3
|
|
DEFINE_HWSERIAL(Serial3, 3);
|
|
#endif
|
|
#if BOARD_HAVE_UART4
|
|
DEFINE_HWSERIAL(Serial4, 4);
|
|
#endif
|
|
#if BOARD_HAVE_UART5
|
|
DEFINE_HWSERIAL(Serial5, 5);
|
|
#endif
|
|
#if BOARD_HAVE_USART6
|
|
DEFINE_HWSERIAL(Serial6, 6);
|
|
#endif
|
|
|
|
HardwareSerial::HardwareSerial(usart_dev *usart_device,
|
|
uint8 tx_pin,
|
|
uint8 rx_pin) {
|
|
this->usart_device = usart_device;
|
|
this->tx_pin = tx_pin;
|
|
this->rx_pin = rx_pin;
|
|
}
|
|
|
|
/*
|
|
* Set up/tear down
|
|
*/
|
|
|
|
#if STM32_MCU_SERIES == STM32_SERIES_F1
|
|
/* F1 MCUs have no GPIO_AFR[HL], so turn off PWM if there's a conflict
|
|
* on this GPIO bit. */
|
|
static void disable_timer_if_necessary(timer_dev *dev, uint8 ch) {
|
|
if (dev != NULL) {
|
|
timer_set_mode(dev, ch, TIMER_DISABLED);
|
|
}
|
|
}
|
|
#elif (STM32_MCU_SERIES == STM32_SERIES_F2) || \
|
|
(STM32_MCU_SERIES == STM32_SERIES_F4)
|
|
#define disable_timer_if_necessary(dev, ch) ((void)0)
|
|
#else
|
|
#warning "Unsupported STM32 series; timer conflicts are possible"
|
|
#endif
|
|
|
|
void HardwareSerial::begin(uint32 baud) {
|
|
ASSERT(baud <= this->usart_device->max_baud);
|
|
|
|
if (baud > this->usart_device->max_baud) {
|
|
return;
|
|
}
|
|
|
|
const stm32_pin_info *txi = &PIN_MAP[this->tx_pin];
|
|
const stm32_pin_info *rxi = &PIN_MAP[this->rx_pin];
|
|
|
|
disable_timer_if_necessary(txi->timer_device, txi->timer_channel);
|
|
|
|
usart_config_gpios_async(this->usart_device,
|
|
rxi->gpio_device, rxi->gpio_bit,
|
|
txi->gpio_device, txi->gpio_bit,
|
|
0);
|
|
usart_init(this->usart_device);
|
|
usart_set_baud_rate(this->usart_device, USART_USE_PCLK, baud);
|
|
usart_enable(this->usart_device);
|
|
}
|
|
|
|
void HardwareSerial::end(void) {
|
|
usart_disable(this->usart_device);
|
|
}
|
|
|
|
/*
|
|
* I/O
|
|
*/
|
|
|
|
uint8 HardwareSerial::read(void) {
|
|
// Block until a byte becomes available, to save user confusion.
|
|
while (!this->available())
|
|
;
|
|
return usart_getc(this->usart_device);
|
|
}
|
|
|
|
uint32 HardwareSerial::available(void) {
|
|
return usart_data_available(this->usart_device);
|
|
}
|
|
|
|
void HardwareSerial::write(unsigned char ch) {
|
|
usart_putc(this->usart_device, ch);
|
|
}
|
|
|
|
void HardwareSerial::flush(void) {
|
|
usart_reset_rx(this->usart_device);
|
|
}
|