Diff: mbed-dev-master/targets/TARGET_STM/gpio_api.c

Revision:

0:bb348c97df44

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-dev-master/targets/TARGET_STM/gpio_api.c	Wed Sep 16 01:11:49 2020 +0000
@@ -0,0 +1,164 @@
+/* mbed Microcontroller Library
+ *******************************************************************************
+ * Copyright (c) 2015, 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 "gpio_api.h"
+#include "pinmap.h"
+#include "mbed_error.h"
+#include "pin_device.h"
+
+extern const uint32_t ll_pin_defines[16];
+
+// Enable GPIO clock and return GPIO base address
+GPIO_TypeDef *Set_GPIO_Clock(uint32_t port_idx)
+{
+    uint32_t gpio_add = 0;
+    switch (port_idx) {
+        case PortA:
+            gpio_add = GPIOA_BASE;
+            __HAL_RCC_GPIOA_CLK_ENABLE();
+            break;
+        case PortB:
+            gpio_add = GPIOB_BASE;
+            __HAL_RCC_GPIOB_CLK_ENABLE();
+            break;
+#if defined(GPIOC_BASE)
+        case PortC:
+            gpio_add = GPIOC_BASE;
+            __HAL_RCC_GPIOC_CLK_ENABLE();
+            break;
+#endif
+#if defined GPIOD_BASE
+        case PortD:
+            gpio_add = GPIOD_BASE;
+            __HAL_RCC_GPIOD_CLK_ENABLE();
+            break;
+#endif
+#if defined GPIOE_BASE
+        case PortE:
+            gpio_add = GPIOE_BASE;
+            __HAL_RCC_GPIOE_CLK_ENABLE();
+            break;
+#endif
+#if defined GPIOF_BASE
+        case PortF:
+            gpio_add = GPIOF_BASE;
+            __HAL_RCC_GPIOF_CLK_ENABLE();
+            break;
+#endif
+#if defined GPIOG_BASE
+        case PortG:
+#if defined TARGET_STM32L4
+            __HAL_RCC_PWR_CLK_ENABLE();
+            HAL_PWREx_EnableVddIO2();
+#endif
+            gpio_add = GPIOG_BASE;
+            __HAL_RCC_GPIOG_CLK_ENABLE();
+            break;
+#endif
+#if defined GPIOH_BASE
+        case PortH:
+            gpio_add = GPIOH_BASE;
+            __HAL_RCC_GPIOH_CLK_ENABLE();
+            break;
+#endif
+#if defined GPIOI_BASE
+        case PortI:
+            gpio_add = GPIOI_BASE;
+            __HAL_RCC_GPIOI_CLK_ENABLE();
+            break;
+#endif
+#if defined GPIOJ_BASE
+        case PortJ:
+            gpio_add = GPIOJ_BASE;
+            __HAL_RCC_GPIOJ_CLK_ENABLE();
+            break;
+#endif
+#if defined GPIOK_BASE
+        case PortK:
+            gpio_add = GPIOK_BASE;
+            __HAL_RCC_GPIOK_CLK_ENABLE();
+            break;
+#endif
+        default:
+            error("Pinmap error: wrong port number.");
+            break;
+    }
+    return (GPIO_TypeDef *) gpio_add;
+}
+
+uint32_t gpio_set(PinName pin)
+{
+    MBED_ASSERT(pin != (PinName)NC);
+
+    pin_function(pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
+
+    return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask
+}
+
+
+void gpio_init(gpio_t *obj, PinName pin)
+{
+    obj->pin = pin;
+    if (pin == (PinName)NC) {
+        return;
+    }
+
+    uint32_t port_index = STM_PORT(pin);
+
+    // Enable GPIO clock
+    GPIO_TypeDef *gpio = Set_GPIO_Clock(port_index);
+
+    // Fill GPIO object structure for future use
+    obj->mask    = gpio_set(pin);
+    obj->gpio  = gpio;
+    obj->ll_pin  = ll_pin_defines[STM_PIN(obj->pin)];
+    obj->reg_in  = &gpio->IDR;
+    obj->reg_set = &gpio->BSRR;
+#ifdef GPIO_IP_WITHOUT_BRR
+    obj->reg_clr = &gpio->BSRR;
+#else
+    obj->reg_clr = &gpio->BRR;
+#endif
+}
+
+void gpio_mode(gpio_t *obj, PinMode mode)
+{
+    pin_mode(obj->pin, mode);
+}
+
+inline void gpio_dir(gpio_t *obj, PinDirection direction)
+{
+    if (direction == PIN_INPUT) {
+        LL_GPIO_SetPinMode(obj->gpio, obj->ll_pin, LL_GPIO_MODE_INPUT);
+    } else {
+        LL_GPIO_SetPinMode(obj->gpio, obj->ll_pin, LL_GPIO_MODE_OUTPUT);
+    }
+}
+