/* ***************************************************************************** * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * Created: 12/19/09 05:15:24 EST * Copyright (c) 2009 Perry L. Hung. All rights reserved. * * ****************************************************************************/ /** * @file HardwareSerial.cpp * * @brief Wiring-like serial api */ #include "wiring.h" #include "HardwareSerial.h" #include "usart.h" #include "gpio.h" #include "timers.h" #define USART1_TX_PORT GPIOA_BASE #define USART1_TX_PIN 9 #define USART1_RX_PORT GPIOA_BASE #define USART1_RX_PIN 10 #define USART2_TX_PORT GPIOA_BASE #define USART2_TX_PIN 2 #define USART2_RX_PORT GPIOA_BASE #define USART2_RX_PIN 3 #define USART3_TX_PORT GPIOB_BASE #define USART3_TX_PIN 10 #define USART3_RX_PORT GPIOB_BASE #define USART3_RX_PIN 11 HardwareSerial::HardwareSerial(uint8_t usartNum) { ASSERT(usartNum == 1 || usartNum == 2 || usartNum == 3); this->usartNum = usartNum; } uint8_t HardwareSerial::read(void) { return usart_getc(usartNum); } uint32 HardwareSerial::available(void) { return usart_data_available(usartNum); } void HardwareSerial::write(unsigned char ch) { usart_putc(usartNum, ch); } void HardwareSerial::begin(uint32_t baud) { ASSERT(!(baud > USART_MAX_BAUD)); /* Set appropriate pin modes */ switch (usartNum) { case 1: gpio_set_mode(USART1_TX_PORT, USART1_TX_PIN, GPIO_MODE_AF_OUTPUT_PP); gpio_set_mode(USART1_RX_PORT, USART1_RX_PIN, GPIO_MODE_INPUT_FLOATING); break; case 2: gpio_set_mode(USART2_TX_PORT, USART2_TX_PIN, GPIO_MODE_AF_OUTPUT_PP); gpio_set_mode(USART2_RX_PORT, USART2_RX_PIN, GPIO_MODE_INPUT_FLOATING); /* Turn off any pwm */ timers_disable_channel(2, 3); break; case 3: gpio_set_mode(USART3_TX_PORT, USART3_TX_PIN, GPIO_MODE_AF_OUTPUT_PP); gpio_set_mode(USART3_RX_PORT, USART3_RX_PIN, GPIO_MODE_INPUT_FLOATING); break; default: ASSERT(0); } usart_init(usartNum, baud); } HardwareSerial Serial1(1); HardwareSerial Serial2(2); HardwareSerial Serial3(3);