Diff: targets/TARGET_GigaDevice/TARGET_GD32F4XX/pinmap.c

Revision:

189:f392fc9709a3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_GigaDevice/TARGET_GD32F4XX/pinmap.c	Wed Feb 20 22:31:08 2019 +0000
@@ -0,0 +1,95 @@
+/* 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_MODE[];
+extern const int GD_GPIO_PULL_UP_DOWN[];
+extern const int GD_GPIO_OUTPUT_MODE[];
+extern const int GD_GPIO_SPEED[];
+extern const int GD_GPIO_AF[];
+
+/** 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 output = GD_PIN_OUTPUT_MODE_GET(function) ;
+    uint32_t pull  = GD_PIN_PULL_STATE_GET(function);
+    uint32_t speed = GD_PIN_SPEED_GET(function);
+    uint32_t af = GD_PIN_REMAP_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_af_set(gpio, GD_GPIO_AF[af], gd_pin);
+    gpio_mode_set(gpio, GD_GPIO_MODE[mode], GD_GPIO_PULL_UP_DOWN[pull], gd_pin);
+    gpio_output_options_set(gpio, GD_GPIO_OUTPUT_MODE[output], GD_GPIO_SPEED[speed], gd_pin);
+}
+
+/** 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);
+    /* get pin mode */
+    uint32_t pin_mode = (GPIO_CTL(gpio) >> (gd_pin * 2)) & 0x03;
+    if ((pin_mode == PIN_MODE_OUTPUT) || (pin_mode == PIN_MODE_ANALOG)) {
+        if ((mode == OpenDrainNoPull) || (mode == OpenDrainPullUp) || (mode == OpenDrainPullDown)) {
+            /* set pin open drain mode */
+            GPIO_OMODE(gpio) |= (uint32_t)gd_pin;
+        } else {
+            /* set pin push pull mode */
+            GPIO_OMODE(gpio) &= (uint32_t)(~gd_pin);
+        }
+    }
+
+    if ((mode == OpenDrainPullUp) || (mode == PullUp)) {
+        /* clear the specified pin pupd bits */
+        GPIO_PUD(gpio) &= ~GPIO_PUPD_MASK(gd_pin);
+        /* set the specified pin pull up */
+        GPIO_PUD(gpio) |= GPIO_PUPD_SET(gd_pin, GPIO_PUPD_PULLUP);
+    } else if ((mode == OpenDrainPullDown) || (mode == PullDown)) {
+        /* clear the specified pin pupd bits */
+        GPIO_PUD(gpio) &= ~GPIO_PUPD_MASK(gd_pin);
+        /* set the specified pin pull down */
+        GPIO_PUD(gpio) |= GPIO_PUPD_SET(gd_pin, GPIO_PUPD_PULLDOWN);
+    } else {
+        /* clear the specified pin pupd bits */
+        GPIO_PUD(gpio) &= ~GPIO_PUPD_MASK(gd_pin);
+        /* set the specified pin pull none */
+        GPIO_PUD(gpio) |= GPIO_PUPD_SET(gd_pin, GPIO_PUPD_NONE);
+    }
+}