Diff: targets/hal/TARGET_Atmel/TARGET_SAM21/pinmap.c

Revision:

592:a274ee790e56

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_Atmel/TARGET_SAM21/pinmap.c	Fri Jul 17 09:15:10 2015 +0100
@@ -0,0 +1,108 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * 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 <stddef.h>
+#include "us_ticker_api.h"
+#include "cmsis.h"
+#include "mbed_assert.h"
+#include "ins_gclk.h"
+#include "compiler.h"
+#include "system.h"
+
+#include "pinmux.h"
+#include "pinmap.h"
+
+extern uint8_t g_sys_init;
+
+
+static inline void pinmux_get_current_config(PinName pin, struct system_pinmux_config *const config)
+{
+    MBED_ASSERT(pin != (PinName)NC);
+    uint32_t pin_index = pin % 32;
+    uint32_t pin_mask = (uint32_t)(1UL << pin_index);
+
+    PortGroup *const port = system_pinmux_get_group_from_gpio_pin(pin);
+    MBED_ASSERT(port);
+
+    config->mux_position = system_pinmux_pin_get_mux_position(pin);
+
+    if (port->PINCFG[pin_index].reg & PORT_PINCFG_INEN) {
+        if (port->DIR.reg & pin_mask) {
+            config->direction = SYSTEM_PINMUX_PIN_DIR_OUTPUT_WITH_READBACK;
+            config->input_pull = SYSTEM_PINMUX_PIN_PULL_NONE;
+        } else {
+            config->direction = SYSTEM_PINMUX_PIN_DIR_INPUT;
+            if (port->PINCFG[pin_index].reg & PORT_PINCFG_PULLEN) {
+                if (port->OUT.reg & pin_mask) {
+                    config->input_pull = SYSTEM_PINMUX_PIN_PULL_UP;
+                } else {
+                    config->input_pull = SYSTEM_PINMUX_PIN_PULL_DOWN;
+                }
+            } else {
+                config->input_pull = SYSTEM_PINMUX_PIN_PULL_NONE;
+            }
+        }
+    } else {
+        config->input_pull = SYSTEM_PINMUX_PIN_PULL_NONE;
+        config->direction = SYSTEM_PINMUX_PIN_DIR_OUTPUT;
+    }
+
+    /* Not relevant for now */
+    config->powersave = false;
+}
+
+/** Change the MUX padding of input pin
+ *
+ * Configure the pin for specific module
+ * @param[in]  pin      Pin name whose MUX padding is to be changed
+ * @param[in]  function The MUX mode to be selected
+ * @return              void
+ */
+void pin_function(PinName pin, int function)
+{
+    MBED_ASSERT(pin != (PinName)NC);
+
+    struct system_pinmux_config pin_conf;
+
+    pinmux_get_current_config(pin, &pin_conf);
+    pin_conf.mux_position = function;
+
+    system_pinmux_pin_set_config(pin, &pin_conf);
+}
+
+/** Change the pin pull mode
+ *
+ * Configure the pin pull mode
+ * @param[in]  pin      Pin name whose MUX padding is to be changed
+ * @param[in]  mode     Pin pull mode to be set
+ * @return              void
+ */
+void pin_mode(PinName pin, PinMode mode)
+{
+    MBED_ASSERT(pin != (PinName)NC);
+
+    struct system_pinmux_config pin_conf;
+
+    pinmux_get_current_config(pin, &pin_conf);
+    if (mode == PullUp) {
+        pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_UP;
+    } else if (mode == PullDown) {
+        pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_DOWN;
+    } else {
+        pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_NONE;
+    }
+
+    system_pinmux_pin_set_config(pin, &pin_conf);
+}
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