Diff: targets/hal/TARGET_STM/TARGET_STM32F3XX/pinmap.c

Revision:

155:8435094ec241

Child:

227:7bd0639b8911

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_STM/TARGET_STM32F3XX/pinmap.c	Tue Apr 08 09:15:06 2014 +0100
@@ -0,0 +1,133 @@
+/* mbed Microcontroller Library
+ *******************************************************************************
+ * Copyright (c) 2014, 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 "pinmap.h"
+#include "PortNames.h"
+#include "error.h"
+
+// Enable GPIO clock and return GPIO base address
+uint32_t Set_GPIO_Clock(uint32_t port_idx) {
+    uint32_t gpio_add;
+    switch (port_idx) {
+        case PortA:
+            gpio_add = GPIOA_BASE;
+            RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
+            break;
+        case PortB:
+            gpio_add = GPIOB_BASE;
+            RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
+            break;
+        case PortC:
+            gpio_add = GPIOC_BASE;
+            RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);
+            break;
+        case PortD:
+            gpio_add = GPIOD_BASE;
+            RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOD, ENABLE);
+            break;
+        case PortE:
+            gpio_add = GPIOE_BASE;
+            RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOE, ENABLE);
+            break;
+        case PortF:
+            gpio_add = GPIOF_BASE;
+            RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOF, ENABLE);
+            break;
+        default:
+            gpio_add = 0;
+            error("Port number is not correct.");
+            break;
+    }
+    return gpio_add;
+}
+
+/**
+ * Configure pin (mode, speed, output type and pull-up/pull-down)
+ */
+void pin_function(PinName pin, int data) {
+    if (pin == NC) return;
+
+    // Get the pin informations
+    uint32_t mode  = STM_PIN_MODE(data);
+    uint32_t otype = STM_PIN_OTYPE(data);
+    uint32_t pupd  = STM_PIN_PUPD(data);
+    uint32_t afnum = STM_PIN_AFNUM(data);
+
+    uint32_t port_index = STM_PORT(pin);
+    uint32_t pin_index  = STM_PIN(pin);
+
+    // Enable GPIO clock
+    uint32_t gpio_add = Set_GPIO_Clock(port_index);
+    GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
+
+    // Configure Alternate Function
+    // Warning: Must be done before the GPIO is initialized
+    if (afnum != 0xFF) {
+        GPIO_PinAFConfig(gpio, (uint16_t)pin_index, afnum);
+    }
+
+    // Configure GPIO
+    GPIO_InitTypeDef GPIO_InitStructure;
+    GPIO_InitStructure.GPIO_Pin   = (uint16_t)(1 << pin_index);
+    GPIO_InitStructure.GPIO_Mode  = (GPIOMode_TypeDef)mode;
+    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;
+    GPIO_InitStructure.GPIO_OType = (GPIOOType_TypeDef)otype;
+    GPIO_InitStructure.GPIO_PuPd  = (GPIOPuPd_TypeDef)pupd;
+    GPIO_Init(gpio, &GPIO_InitStructure);
+
+    // [TODO] Disconnect JTAG-DP + SW-DP signals.
+    // Warning: Need to reconnect under reset
+    //if ((pin == PA_13) || (pin == PA_14)) {
+    //
+    //}
+    //if ((pin == PA_15) || (pin == PB_3) || (pin == PB_4)) {
+    //
+    //}
+}
+
+/**
+ * Configure pin pull-up/pull-down
+ */
+void pin_mode(PinName pin, PinMode mode) {
+    if (pin == NC) return;
+
+    uint32_t port_index = STM_PORT(pin);
+    uint32_t pin_index  = STM_PIN(pin);
+
+    // Enable GPIO clock
+    uint32_t gpio_add = Set_GPIO_Clock(port_index);
+    GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
+
+    // Configure pull-up/pull-down resistors
+    uint32_t pupd = (uint32_t)mode;
+    if (pupd > 2) pupd = 0; // Open-drain = No pull-up/No pull-down
+    gpio->PUPDR &= (uint32_t)(~(GPIO_PUPDR_PUPDR0 << (pin_index * 2)));
+    gpio->PUPDR |= (uint32_t)(pupd << (pin_index * 2));
+
+}