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Diffstat (limited to 'wirish/HardwareSerial.cpp')
-rw-r--r-- | wirish/HardwareSerial.cpp | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/wirish/HardwareSerial.cpp b/wirish/HardwareSerial.cpp new file mode 100644 index 0000000..a9eb763 --- /dev/null +++ b/wirish/HardwareSerial.cpp @@ -0,0 +1,120 @@ +/****************************************************************************** + * 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); +} |