Lee Kai Xuan
mbed-os
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Diff: targets/TARGET_STM/TARGET_STM32L4/pinmap.c
- Revision:
- 0:f269e3021894
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_STM/TARGET_STM32L4/pinmap.c Sun Oct 23 15:10:02 2016 +0000
@@ -0,0 +1,167 @@
+/* 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 "pinmap.h"
+#include "PortNames.h"
+#include "mbed_error.h"
+
+// GPIO mode look-up table
+// Warning: order must be the same as the one defined in PinNames.h !!!
+static const uint32_t gpio_mode[14] = {
+ 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
+ 0x0000000B, // 6 = GPIO_MODE_ANALOG_ADC_CONTROL
+ 0x10110000, // 7 = GPIO_MODE_IT_RISING
+ 0x10210000, // 8 = GPIO_MODE_IT_FALLING
+ 0x10310000, // 9 = GPIO_MODE_IT_RISING_FALLING
+ 0x10120000, // 10 = GPIO_MODE_EVT_RISING
+ 0x10220000, // 11 = GPIO_MODE_EVT_FALLING
+ 0x10320000, // 12 = GPIO_MODE_EVT_RISING_FALLING
+ 0x10000000 // 13 = 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;
+ __HAL_RCC_GPIOA_CLK_ENABLE();
+ break;
+ case PortB:
+ gpio_add = GPIOB_BASE;
+ __HAL_RCC_GPIOB_CLK_ENABLE();
+ break;
+ case PortC:
+ gpio_add = GPIOC_BASE;
+ __HAL_RCC_GPIOC_CLK_ENABLE();
+ break;
+#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
+ case PortH:
+ gpio_add = GPIOH_BASE;
+ __HAL_RCC_GPIOH_CLK_ENABLE();
+ break;
+ default:
+ error("Pinmap error: wrong port number\n");
+ 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));
+}