Diff: targets/TARGET_STM/TARGET_STM32L1/pinmap.c

Revision:

0:f269e3021894

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_STM/TARGET_STM32L1/pinmap.c	Sun Oct 23 15:10:02 2016 +0000
@@ -0,0 +1,158 @@
+/* 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 "mbed_assert.h"
+#include "pinmap.h"
+#include "PortNames.h"
+#include "mbed_error.h"
+
+// GPIO mode look-up table
+static const uint32_t gpio_mode[13] = {
+    0x00000000, //  0 = GPIO_MODE_INPUT
+    0x00000001, //  1 = GPIO_MODE_OUTPUT_PP
+    0x00000011, //  2 = GPIO_MODE_OUTPUT_OD
+    0x00000002, //  3 = GPIO_MODE_AF_PP
+    0x00000012, //  4 = GPIO_MODE_AF_OD
+    0x00000003, //  5 = GPIO_MODE_ANALOG
+    0x10110000, //  6 = GPIO_MODE_IT_RISING
+    0x10210000, //  7 = GPIO_MODE_IT_FALLING
+    0x10310000, //  8 = GPIO_MODE_IT_RISING_FALLING
+    0x10120000, //  9 = GPIO_MODE_EVT_RISING
+    0x10220000, // 10 = GPIO_MODE_EVT_FALLING
+    0x10320000, // 11 = GPIO_MODE_EVT_RISING_FALLING
+    0x10000000  // 12 = Reset IT and EVT (not in STM32Cube HAL)
+};
+
+// Enable GPIO clock and return GPIO base address
+uint32_t Set_GPIO_Clock(uint32_t port_idx)
+{
+    uint32_t gpio_add = 0;
+    switch (port_idx) {
+        case PortA:
+            gpio_add = GPIOA_BASE;
+            __GPIOA_CLK_ENABLE();
+            break;
+        case PortB:
+            gpio_add = GPIOB_BASE;
+            __GPIOB_CLK_ENABLE();
+            break;
+        case PortC:
+            gpio_add = GPIOC_BASE;
+            __GPIOC_CLK_ENABLE();
+            break;
+        case PortD:
+            gpio_add = GPIOD_BASE;
+            __GPIOD_CLK_ENABLE();
+            break;
+        case PortH:
+            gpio_add = GPIOH_BASE;
+            __GPIOH_CLK_ENABLE();
+            break;
+        default:
+            error("Pinmap error: wrong port number.");
+            break;
+    }
+    return gpio_add;
+}
+
+/**
+ * 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_MODE(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 GPIO
+    GPIO_InitTypeDef GPIO_InitStructure;
+    GPIO_InitStructure.Pin       = (uint32_t)(1 << pin_index);
+    GPIO_InitStructure.Mode      = gpio_mode[mode];
+    GPIO_InitStructure.Pull      = pupd;
+    GPIO_InitStructure.Speed     = GPIO_SPEED_HIGH;
+    GPIO_InitStructure.Alternate = afnum;
+    HAL_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)
+{
+    MBED_ASSERT(pin != (PinName)NC);
+    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));
+}
+
+/*  Internal function for setting the gpiomode/function
+ *  without changing Pull mode
+ */
+void pin_function_gpiomode(PinName pin, uint32_t gpiomode) {
+
+    /* Read current pull state from HW to avoid over-write*/
+    uint32_t port_index = STM_PORT(pin);
+    uint32_t pin_index  = STM_PIN(pin);
+    GPIO_TypeDef *gpio = (GPIO_TypeDef *) Set_GPIO_Clock(port_index);
+    uint32_t temp = gpio->PUPDR;
+    uint32_t pull = (temp  >> (pin_index * 2U)) & GPIO_PUPDR_PUPDR0;
+
+    /* Then re-use global function for updating the mode part*/
+    pin_function(pin, STM_PIN_DATA(gpiomode, pull, 0));
+}