Diff: targets/hal/TARGET_STM/TARGET_DISCO_F100RB/pinmap.c

Revision:

126:549ba18ddd81

Child:

142:7f2b6c44bbe3

diff -r 23cc3068a9e4 -r 549ba18ddd81 targets/hal/TARGET_STM/TARGET_DISCO_F100RB/pinmap.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_STM/TARGET_DISCO_F100RB/pinmap.c	Wed Mar 19 16:00:09 2014 +0000
@@ -0,0 +1,161 @@
+/* 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 "error.h"
+
+// Alternate-function mapping
+static const uint32_t AF_mapping[] = {
+  0,                      // 0 = No AF
+  GPIO_Remap_SPI1,        // 1
+  GPIO_Remap_I2C1,        // 2
+  GPIO_Remap_USART1,      // 3
+  GPIO_Remap_USART2,      // 4
+  GPIO_FullRemap_TIM2,    // 5
+  GPIO_FullRemap_TIM3,    // 6
+  GPIO_PartialRemap_TIM3, // 7
+  GPIO_Remap_I2C1         // 8
+};
+
+// 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;
+            RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
+            break;
+        case PortB:
+            gpio_add = GPIOB_BASE;
+            RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
+            break;
+        case PortC:
+            gpio_add = GPIOC_BASE;
+            RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
+            break;
+        case PortD:
+            gpio_add = GPIOD_BASE;
+            RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);
+            break;
+        default:
+            error("Port number is not correct.");
+            break;
+    }
+    return gpio_add;
+}
+
+/**
+ * Configure pin (input, output, alternate function or analog) + output speed + AF
+ */
+void pin_function(PinName pin, int data) {
+    if (pin == NC) return;
+
+    // Get the pin informations
+    uint32_t mode  = STM_PIN_MODE(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;
+
+    // Enable AFIO clock
+    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
+
+    // Configure Alternate Function
+    // Warning: Must be done before the GPIO is initialized
+    if (afnum > 0) {
+        GPIO_PinRemapConfig(AF_mapping[afnum], ENABLE);
+    }
+  
+    // 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_50MHz;
+    GPIO_Init(gpio, &GPIO_InitStructure);
+    
+    // Disconnect JTAG-DP + SW-DP signals.
+    // Warning: Need to reconnect under reset
+    if ((pin == PA_13) || (pin == PA_14)) {
+        GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable, ENABLE);
+    }
+    if ((pin == PA_15) || (pin == PB_3) || (pin == PB_4)) {
+        GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE);
+    }    
+}
+
+/**
+ * Configure pin pull-up/pull-down
+ */
+void pin_mode(PinName pin, PinMode mode) {
+    GPIO_InitTypeDef GPIO_InitStructure;
+    
+    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 open-drain and pull-up/down
+    switch (mode) {
+      case PullNone:       
+        return;
+      case PullUp:
+        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
+      break;
+      case PullDown:
+        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
+      break;
+      case OpenDrain:
+        if (pin_index < 8) {
+            if ((gpio->CRL & (0x03 << (pin_index * 4))) > 0) { // MODE bits = Output mode
+                gpio->CRL |= (0x04 << (pin_index * 4)); // Set open-drain
+            }
+        }
+        else {
+            if ((gpio->CRH & (0x03 << ((pin_index % 8) * 4))) > 0) { // MODE bits = Output mode          
+                gpio->CRH |= (0x04 << ((pin_index % 8) * 4)); // Set open-drain
+            }
+        }
+        return;
+      default:
+      break;
+    }
+    
+    // Configure GPIO
+    GPIO_InitStructure.GPIO_Pin   = (uint16_t)(1 << pin_index);
+    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+    GPIO_Init(gpio, &GPIO_InitStructure);    
+}