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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 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 usartNum) {
ASSERT(usartNum == 1 ||
usartNum == 2 ||
usartNum == 3);
this->usartNum = usartNum;
}
uint8 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 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);
/* Turn off any pwm */
timers_disable_channel(1, 2);
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);
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