Import Mbed OS hard-float snapshot

targets/TARGET_GigaDevice/TARGET_GD32F30X/pinmap.c

@@ -0,0 +1,135 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2018 GigaDevice Semiconductor Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "mbed_assert.h"
+#include "pinmap.h"
+#include "PortNames.h"
+#include "mbed_error.h"
+
+extern uint32_t gpio_clock_enable(uint32_t port_idx);
+
+extern const int GD_GPIO_REMAP[];
+extern const int GD_GPIO_MODE[];
+extern const int GD_GPIO_SPEED[];
+
+static void gpio_mode_set(uint32_t gpio_periph, uint32_t mode, uint32_t pin);
+
+/** Configure pin (mode, speed, reamp function )
+ *
+ * @param pin gpio pin name
+ * @param function gpio pin mode, speed, remap function
+ */
+void pin_function(PinName pin, int function)
+{
+    MBED_ASSERT(pin != (PinName)NC);
+
+    uint32_t mode  = GD_PIN_MODE_GET(function);
+    uint32_t remap = GD_PIN_REMAP_GET(function);
+    uint32_t speed = GD_PIN_SPEED_GET(function);
+    uint32_t port  = GD_PORT_GET(pin);
+    uint32_t gd_pin  = 1 << GD_PIN_GET(pin);
+
+    uint32_t gpio = gpio_clock_enable(port);
+    gpio_para_init(gpio, GD_GPIO_MODE[mode], GD_GPIO_SPEED[speed], gd_pin);
+
+    if (remap != 0) {
+        rcu_periph_clock_enable(RCU_AF);
+        gpio_pin_remap_config(GD_GPIO_REMAP[remap], ENABLE);
+    }
+}
+
+/** Only configure pin mode
+ *
+ * @param pin gpio pin name
+ * @param function gpio pin mode
+ */
+void pin_mode(PinName pin, PinMode mode)
+{
+    MBED_ASSERT(pin != (PinName)NC);
+    uint32_t port  = GD_PORT_GET(pin);
+    uint32_t gd_pin  = 1 << GD_PIN_GET(pin);
+
+    uint32_t gpio = gpio_clock_enable(port);
+    if (mode != PullNone) {
+        gpio_mode_set(gpio, GD_GPIO_MODE[mode], gd_pin);
+    }
+}
+
+/** configure gpio pin mode
+ *
+ * @param gpio_periph gpio port name
+ * @param mode gpio pin mode
+ * @param pin gpio pin number
+ */
+static void gpio_mode_set(uint32_t gpio_periph, uint32_t mode, uint32_t pin)
+{
+    uint16_t i;
+    uint32_t temp_mode = 0U;
+    uint32_t reg = 0U;
+
+    /* GPIO mode configuration */
+    temp_mode = (uint32_t)(mode & ((uint32_t)0x0FU));
+
+    /* configure the eight low port pins with GPIO_CTL0 */
+    for (i = 0U; i < 8U; i++) {
+        if ((1U << i) & pin) {
+            reg = GPIO_CTL0(gpio_periph);
+
+            /* set the specified pin mode bits */
+            reg |= GPIO_MODE_SET(i, temp_mode);
+
+            /* set IPD or IPU */
+            if (GPIO_MODE_IPD == mode) {
+                /* reset the corresponding OCTL bit */
+                GPIO_BC(gpio_periph) = (uint32_t)pin;
+            } else {
+                /* set the corresponding OCTL bit */
+                if (GPIO_MODE_IPU == mode) {
+                    GPIO_BOP(gpio_periph) = (uint32_t)pin;
+                }
+            }
+
+            /* set GPIO_CTL0 register */
+            GPIO_CTL0(gpio_periph) = reg;
+        }
+    }
+    /* configure the eight high port pins with GPIO_CTL1 */
+    for (i = 8U; i < 16U; i++) {
+        if ((1U << i) & pin) {
+            reg = GPIO_CTL1(gpio_periph);
+
+            /* set the specified pin mode bits */
+            reg |= GPIO_MODE_SET(i - 8U, temp_mode);
+
+            /* set IPD or IPU */
+            if (GPIO_MODE_IPD == mode) {
+                /* reset the corresponding OCTL bit */
+                GPIO_BC(gpio_periph) = (uint32_t)pin;
+            } else {
+                /* set the corresponding OCTL bit */
+                if (GPIO_MODE_IPU == mode) {
+                    GPIO_BOP(gpio_periph) = (uint32_t)pin;
+                }
+            }
+
+            /* set GPIO_CTL1 register */
+            GPIO_CTL1(gpio_periph) = reg;
+        }
+    }
+}
+
+