1 files changed, 137 insertions, 0 deletions
diff --git a/wirish/HardwareSerial.cpp b/wirish/HardwareSerial.cpp
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+++ b/wirish/HardwareSerial.cpp
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+/******************************************************************************
+ * The MIT License
+ *
+ * Copyright (c) 2010 Perry Hung.
+ * Copyright (c) 2011, 2012 LeafLabs, LLC.
+ *
+ * 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 wirish/HardwareSerial.cpp
+ * @brief Wirish serial port implementation.
+ */
+
+#include <wirish/HardwareSerial.h>
+
+#include <libmaple/libmaple.h>
+#include <libmaple/gpio.h>
+#include <libmaple/timer.h>
+#include <libmaple/usart.h>
+
+#define DEFINE_HWSERIAL(name, n)                                   \
+    HardwareSerial name(USART##n,                                  \
+                        BOARD_USART##n##_TX_PIN,                   \
+                        BOARD_USART##n##_RX_PIN)
+
+#if BOARD_HAVE_USART1
+DEFINE_HWSERIAL(Serial1, 1);
+#endif
+#if BOARD_HAVE_USART2
+DEFINE_HWSERIAL(Serial2, 2);
+#endif
+#if BOARD_HAVE_USART3
+DEFINE_HWSERIAL(Serial3, 3);
+#endif
+#if BOARD_HAVE_UART4
+DEFINE_HWSERIAL(Serial4, 4);
+#endif
+#if BOARD_HAVE_UART5
+DEFINE_HWSERIAL(Serial5, 5);
+#endif
+#if BOARD_HAVE_USART6
+DEFINE_HWSERIAL(Serial6, 6);
+#endif
+
+HardwareSerial::HardwareSerial(usart_dev *usart_device,
+                               uint8 tx_pin,
+                               uint8 rx_pin) {
+    this->usart_device = usart_device;
+    this->tx_pin = tx_pin;
+    this->rx_pin = rx_pin;
+}
+
+/*
+ * Set up/tear down
+ */
+
+#if STM32_MCU_SERIES == STM32_SERIES_F1
+/* F1 MCUs have no GPIO_AFR[HL], so turn off PWM if there's a conflict
+ * on this GPIO bit. */
+static void disable_timer_if_necessary(timer_dev *dev, uint8 ch) {
+    if (dev != NULL) {
+        timer_set_mode(dev, ch, TIMER_DISABLED);
+    }
+}
+#elif (STM32_MCU_SERIES == STM32_SERIES_F2) ||    \
+      (STM32_MCU_SERIES == STM32_SERIES_F4)
+#define disable_timer_if_necessary(dev, ch) ((void)0)
+#else
+#warning "Unsupported STM32 series; timer conflicts are possible"
+#endif
+
+void HardwareSerial::begin(uint32 baud) {
+    ASSERT(baud <= this->usart_device->max_baud);
+
+    if (baud > this->usart_device->max_baud) {
+        return;
+    }
+
+    const stm32_pin_info *txi = &PIN_MAP[this->tx_pin];
+    const stm32_pin_info *rxi = &PIN_MAP[this->rx_pin];
+
+    disable_timer_if_necessary(txi->timer_device, txi->timer_channel);
+
+    usart_config_gpios_async(this->usart_device,
+                             rxi->gpio_device, rxi->gpio_bit,
+                             txi->gpio_device, txi->gpio_bit,
+                             0);
+    usart_init(this->usart_device);
+    usart_set_baud_rate(this->usart_device, USART_USE_PCLK, baud);
+    usart_enable(this->usart_device);
+}
+
+void HardwareSerial::end(void) {
+    usart_disable(this->usart_device);
+}
+
+/*
+ * I/O
+ */
+
+uint8 HardwareSerial::read(void) {
+    // Block until a byte becomes available, to save user confusion.
+    while (!this->available())
+        ;
+    return usart_getc(this->usart_device);
+}
+
+uint32 HardwareSerial::available(void) {
+    return usart_data_available(this->usart_device);
+}
+
+void HardwareSerial::write(unsigned char ch) {
+    usart_putc(this->usart_device, ch);
+}
+
+void HardwareSerial::flush(void) {
+    usart_reset_rx(this->usart_device);
+}