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/******************************************************************************
* The MIT License
*
* Copyright (c) 2010 Perry Hung.
*
* 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 HardwareSerial.cpp
* @brief Wirish serial port implementation.
*/
#include <wirish/HardwareSerial.h>
#include <libmaple/libmaple.h>
#include <libmaple/gpio.h>
#include <libmaple/timer.h>
#include <wirish/boards.h>
#define TX1 BOARD_USART1_TX_PIN
#define RX1 BOARD_USART1_RX_PIN
#define TX2 BOARD_USART2_TX_PIN
#define RX2 BOARD_USART2_RX_PIN
#define TX3 BOARD_USART3_TX_PIN
#define RX3 BOARD_USART3_RX_PIN
#if defined STM32_HIGH_DENSITY && !defined(BOARD_maple_RET6)
#define TX4 BOARD_UART4_TX_PIN
#define RX4 BOARD_UART4_RX_PIN
#define TX5 BOARD_UART5_TX_PIN
#define RX5 BOARD_UART5_RX_PIN
#endif
HardwareSerial Serial1(USART1, TX1, RX1, STM32_PCLK2);
HardwareSerial Serial2(USART2, TX2, RX2, STM32_PCLK1);
HardwareSerial Serial3(USART3, TX3, RX3, STM32_PCLK1);
#if defined(STM32_HIGH_DENSITY) && !defined(BOARD_maple_RET6)
HardwareSerial Serial4(UART4, TX4, RX4, STM32_PCLK1);
HardwareSerial Serial5(UART5, TX5, RX5, STM32_PCLK1);
#endif
HardwareSerial::HardwareSerial(usart_dev *usart_device,
uint8 tx_pin,
uint8 rx_pin,
uint32 clock_speed) {
this->usart_device = usart_device;
this->clock_speed = clock_speed;
this->tx_pin = tx_pin;
this->rx_pin = rx_pin;
}
/*
* Set up/tear down
*/
void HardwareSerial::begin(uint32 baud) {
ASSERT(baud <= usart_device->max_baud);
if (baud > usart_device->max_baud) {
return;
}
const stm32_pin_info *txi = &PIN_MAP[tx_pin];
const stm32_pin_info *rxi = &PIN_MAP[rx_pin];
gpio_set_mode(txi->gpio_device, txi->gpio_bit, GPIO_AF_OUTPUT_PP);
gpio_set_mode(rxi->gpio_device, rxi->gpio_bit, GPIO_INPUT_FLOATING);
if (txi->timer_device != NULL) {
/* Turn off any PWM if there's a conflict on this GPIO bit. */
timer_set_mode(txi->timer_device, txi->timer_channel, TIMER_DISABLED);
}
usart_init(usart_device);
usart_set_baud_rate(usart_device, clock_speed, baud);
usart_enable(usart_device);
}
void HardwareSerial::end(void) {
usart_disable(usart_device);
}
/*
* I/O
*/
uint8 HardwareSerial::read(void) {
return usart_getc(usart_device);
}
uint32 HardwareSerial::available(void) {
return usart_data_available(usart_device);
}
void HardwareSerial::write(unsigned char ch) {
usart_putc(usart_device, ch);
}
void HardwareSerial::flush(void) {
usart_reset_rx(usart_device);
}
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