162 lines
4.6 KiB
C++
162 lines
4.6 KiB
C++
/******************************************************************************
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* The MIT License
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*
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* Copyright (c) 2010 Perry Hung.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*****************************************************************************/
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/**
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* @file HardwareSerial.cpp
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* @brief Wirish serial port implementation.
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*/
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#include "libmaple.h"
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#include "gpio.h"
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#include "timer.h"
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#include "HardwareSerial.h"
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#include "boards.h"
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#define TX1 BOARD_USART1_TX_PIN
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#define RX1 BOARD_USART1_RX_PIN
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#ifdef BOARD_USART2_TX_PIN
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#define TX2 BOARD_USART2_TX_PIN
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#define RX2 BOARD_USART2_RX_PIN
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#endif
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#ifdef BOARD_USART3_TX_PIN
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#define TX3 BOARD_USART3_TX_PIN
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#define RX3 BOARD_USART3_RX_PIN
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#endif
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#if defined STM32_HIGH_DENSITY && !defined(BOARD_maple_RET6)
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#define TX4 BOARD_UART4_TX_PIN
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#define RX4 BOARD_UART4_RX_PIN
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#define TX5 BOARD_UART5_TX_PIN
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#define RX5 BOARD_UART5_RX_PIN
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#endif
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HardwareSerial Serial(USART1, TX1, RX1);
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#ifdef TX2
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HardwareSerial Serial1(USART2, TX2, RX2);
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#endif
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#ifdef TX3
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HardwareSerial Serial2(USART3, TX3, RX3);
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#endif
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#if defined(STM32_HIGH_DENSITY) && !defined(BOARD_maple_RET6)
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HardwareSerial Serial3(UART4, TX4, RX4);
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HardwareSerial Serial4(UART5, TX5, RX5);
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#endif
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HardwareSerial::HardwareSerial(usart_dev *usart_device,
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uint8 tx_pin,
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uint8 rx_pin) {
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this->usart_device = usart_device;
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this->tx_pin = tx_pin;
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this->rx_pin = rx_pin;
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}
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/*
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* Set up/tear down
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*/
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void HardwareSerial::begin(uint32 baud) {
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ASSERT(baud <= usart_device->max_baud);
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if (baud > usart_device->max_baud) {
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return;
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}
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const stm32_pin_info *txi = &PIN_MAP[tx_pin];
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const stm32_pin_info *rxi = &PIN_MAP[rx_pin];
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#ifdef STM32F2
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// int af = 7<<8;
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if (usart_device == UART4 || usart_device == UART5) {
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gpio_set_af_mode(txi->gpio_device, txi->gpio_bit, 8);
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gpio_set_af_mode(rxi->gpio_device, rxi->gpio_bit, 8);
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}
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else {
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gpio_set_af_mode(txi->gpio_device, txi->gpio_bit, 7);
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gpio_set_af_mode(rxi->gpio_device, rxi->gpio_bit, 7);
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}
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gpio_set_mode(txi->gpio_device, txi->gpio_bit, (gpio_pin_mode)(GPIO_AF_OUTPUT_PP | GPIO_PUPD_INPUT_PU | 0x700));
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gpio_set_mode(rxi->gpio_device, rxi->gpio_bit, (gpio_pin_mode)(GPIO_MODE_AF | GPIO_PUPD_INPUT_PU | 0x700));
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//gpio_set_mode(txi->gpio_device, txi->gpio_bit, (gpio_pin_mode)(GPIO_PUPD_INPUT_PU));
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//gpio_set_mode(rxi->gpio_device, rxi->gpio_bit, (gpio_pin_mode)(GPIO_PUPD_INPUT_PU));
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#else
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gpio_set_mode(txi->gpio_device, txi->gpio_bit, GPIO_AF_OUTPUT_PP);
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gpio_set_mode(rxi->gpio_device, rxi->gpio_bit, GPIO_INPUT_FLOATING);
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#endif
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#if 0
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if (txi->timer_device != NULL) {
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/* Turn off any PWM if there's a conflict on this GPIO bit. */
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timer_set_mode(txi->timer_device, txi->timer_channel, TIMER_DISABLED);
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}
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#endif
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usart_init(usart_device);
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usart_set_baud_rate(usart_device, baud);
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usart_enable(usart_device);
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}
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void HardwareSerial::end(void) {
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usart_disable(usart_device);
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}
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/*
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* I/O
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*/
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int HardwareSerial::read(void) {
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if(usart_data_available(usart_device) > 0) {
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return usart_getc(usart_device);
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} else {
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return -1;
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}
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}
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int HardwareSerial::available(void) {
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return usart_data_available(usart_device);
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}
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int HardwareSerial::peek(void)
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{
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return usart_peek(usart_device);
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}
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uint32 HardwareSerial::pending(void) {
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return usart_data_pending(usart_device);
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}
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size_t HardwareSerial::write(unsigned char ch) {
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usart_putc(usart_device, ch);
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return 1;
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}
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void HardwareSerial::flush(void) {
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usart_reset_rx(usart_device);
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}
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