Diff: targets/TARGET_STM/pinmap.c

Revision:

160:d5399cc887bb

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_STM/pinmap.c	Tue Mar 14 16:40:56 2017 +0000
@@ -0,0 +1,157 @@
+/* mbed Microcontroller Library
+ *******************************************************************************
+ * Copyright (c) 2017, STMicroelectronics
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************
+ */
+#include "mbed_assert.h"
+#include "pinmap.h"
+#include "PortNames.h"
+#include "mbed_error.h"
+#include "pin_device.h"
+
+extern GPIO_TypeDef *Set_GPIO_Clock(uint32_t port_idx);
+
+const uint32_t ll_pin_defines[16] = {
+    LL_GPIO_PIN_0,
+    LL_GPIO_PIN_1,
+    LL_GPIO_PIN_2,
+    LL_GPIO_PIN_3,
+    LL_GPIO_PIN_4,
+    LL_GPIO_PIN_5,
+    LL_GPIO_PIN_6,
+    LL_GPIO_PIN_7,
+    LL_GPIO_PIN_8,
+    LL_GPIO_PIN_9,
+    LL_GPIO_PIN_10,
+    LL_GPIO_PIN_11,
+    LL_GPIO_PIN_12,
+    LL_GPIO_PIN_13,
+    LL_GPIO_PIN_14,
+    LL_GPIO_PIN_15
+};
+
+/**
+ * Configure pin (mode, speed, output type and pull-up/pull-down)
+ */
+void pin_function(PinName pin, int data)
+{
+    MBED_ASSERT(pin != (PinName)NC);
+
+    // Get the pin informations
+    uint32_t mode  = STM_PIN_FUNCTION(data);
+    uint32_t afnum = STM_PIN_AFNUM(data);
+    uint32_t port = STM_PORT(pin);
+    uint32_t ll_pin  = ll_pin_defines[STM_PIN(pin)];
+    uint32_t ll_mode = 0;
+
+    // Enable GPIO clock
+    GPIO_TypeDef *gpio = Set_GPIO_Clock(port);
+
+    /*  Set default speed to high.
+     *  This is done before other settings on purpose:
+     *  For most families there are dedicated registers so it is
+     *  not so important, register can be set at any time.
+     *  But for families like F1, speed only applies to output. so we set
+     *  it here, and then if input is selected, this setting might be
+     *  overriden by the input one.
+     */
+    LL_GPIO_SetPinSpeed(gpio, ll_pin, LL_GPIO_SPEED_FREQ_HIGH);
+
+    switch (mode) {
+        case STM_PIN_INPUT:
+            ll_mode = LL_GPIO_MODE_INPUT;
+            break;
+        case STM_PIN_OUTPUT:
+            ll_mode = LL_GPIO_MODE_OUTPUT;
+            break;
+        case STM_PIN_ALTERNATE:
+            ll_mode = LL_GPIO_MODE_ALTERNATE;
+            // In case of ALT function, also set he afnum
+           stm_pin_SetAFPin(gpio, pin, afnum);
+            break;
+        case STM_PIN_ANALOG:
+            ll_mode = LL_GPIO_MODE_ANALOG;
+            break;
+        default:
+            MBED_ASSERT(0);
+            break;
+    }
+    LL_GPIO_SetPinMode(gpio, ll_pin, ll_mode);
+
+#if defined(GPIO_ASCR_ASC0)
+    /*  For families where Analog Control ASC0 register is present */
+    if (STM_PIN_ANALOG_CONTROL(data)) {
+        LL_GPIO_EnablePinAnalogControl(gpio, ll_pin);
+    } else {
+        LL_GPIO_DisablePinAnalogControl(gpio, ll_pin);
+    }
+#endif
+
+    /*  For now by default use Speed HIGH for output or alt modes */
+    if ((mode == STM_PIN_OUTPUT) ||(mode == STM_PIN_ALTERNATE)) {
+    if (STM_PIN_OD(data)) {
+            LL_GPIO_SetPinOutputType(gpio, ll_pin, LL_GPIO_OUTPUT_OPENDRAIN);
+    } else {
+            LL_GPIO_SetPinOutputType(gpio, ll_pin, LL_GPIO_OUTPUT_PUSHPULL);
+    }
+    }
+
+    stm_pin_PullConfig(gpio, ll_pin, STM_PIN_PUPD(data));
+
+    stm_pin_DisconnectDebug(pin);
+}
+
+/**
+ * Configure pin pull-up/pull-down
+ */
+void pin_mode(PinName pin, PinMode mode)
+{
+    MBED_ASSERT(pin != (PinName)NC);
+
+    uint32_t port_index = STM_PORT(pin);
+    uint32_t ll_pin  = ll_pin_defines[STM_PIN(pin)];
+    // Enable GPIO clock
+    GPIO_TypeDef *gpio = Set_GPIO_Clock(port_index);
+    uint32_t function = LL_GPIO_GetPinMode(gpio, ll_pin);
+
+    if ((function == LL_GPIO_MODE_OUTPUT) || (function == LL_GPIO_MODE_ALTERNATE))
+    {
+        if ((mode == OpenDrainNoPull) || (mode == OpenDrainPullUp) || (mode == OpenDrainPullDown)) {
+            LL_GPIO_SetPinOutputType(gpio, ll_pin, LL_GPIO_OUTPUT_OPENDRAIN);
+        } else {
+            LL_GPIO_SetPinOutputType(gpio, ll_pin, LL_GPIO_OUTPUT_PUSHPULL);
+        }
+    }
+
+    if ((mode == OpenDrainPullUp) || (mode == PullUp)) {
+        stm_pin_PullConfig(gpio, ll_pin, GPIO_PULLUP);
+    } else if ((mode == OpenDrainPullDown) || (mode == PullDown)) {
+        stm_pin_PullConfig(gpio, ll_pin, GPIO_PULLDOWN);
+    } else {
+        stm_pin_PullConfig(gpio, ll_pin, GPIO_NOPULL);
+    }
+}