Diff: targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/gpio_api.c

Revision:

76:aeb1df146756

Child:

77:b5886236e6f0

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/gpio_api.c	Mon Jan 27 14:30:07 2014 +0000
@@ -0,0 +1,98 @@
+/* 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 "gpio_api.h"
+#include "pinmap.h"
+#include "error.h"
+
+uint32_t gpio_set(PinName pin) {  
+    if (pin == NC) return 0;
+
+    pin_function(pin, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
+
+    return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask
+}
+
+void gpio_init(gpio_t *obj, PinName pin, PinDirection direction) { 
+    GPIO_TypeDef *gpio;
+  
+    if (pin == NC) return;
+
+    uint32_t port_index = STM_PORT(pin);
+
+    // Get GPIO structure base address
+    switch (port_index) {
+        case PortA:
+            gpio = (GPIO_TypeDef *)GPIOA_BASE;
+            break;
+        case PortB:
+            gpio = (GPIO_TypeDef *)GPIOB_BASE;
+            break;
+        case PortC:
+            gpio = (GPIO_TypeDef *)GPIOC_BASE;
+            break;
+        case PortD:
+            gpio = (GPIO_TypeDef *)GPIOD_BASE;
+            break;
+        case PortF:
+            gpio = (GPIO_TypeDef *)GPIOF_BASE;
+            break;
+        default:
+            error("GPIO port number is not correct.");
+            break;          
+    }  
+  
+    // Fill GPIO object structure for future use
+    obj->pin     = pin;
+    obj->mask    = gpio_set(pin);
+    obj->reg_in  = &gpio->IDR;
+    obj->reg_set = &gpio->BSRR;
+    obj->reg_clr = &gpio->BRR;
+  
+    // Configure GPIO
+    if (direction == PIN_OUTPUT) {
+        pin_function(pin, STM_PIN_DATA(GPIO_Mode_OUT, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF));
+    }
+    else { // PIN_INPUT
+        pin_function(pin, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
+    }
+}
+
+void gpio_mode(gpio_t *obj, PinMode mode) {
+    pin_mode(obj->pin, mode);
+}
+
+void gpio_dir(gpio_t *obj, PinDirection direction) {
+    if (direction == PIN_OUTPUT) {
+        pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_OUT, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF));
+    }
+    else { // PIN_INPUT
+        pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
+    }
+}