Diff: targets/hal/TARGET_NXP/TARGET_LPC11CXX/gpio_api.c

Revision:

20:4263a77256ae

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_NXP/TARGET_LPC11CXX/gpio_api.c	Tue Sep 10 15:14:19 2013 +0300
@@ -0,0 +1,62 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "gpio_api.h"
+#include "pinmap.h"
+
+uint32_t gpio_set(PinName pin) {
+    // PIO default value of following ports are not same as others
+    int f = ((pin == P0_0 ) || // RESET
+             (pin == P0_10) || // SWCLK
+             (pin == P0_11) || // R
+             (pin == P1_0 ) || // R
+             (pin == P1_1 ) || // R
+             (pin == P1_2 ) || // R
+             (pin == P1_3 )) ? // 
+             (1) : (0);
+    
+    pin_function(pin, f);
+    return ((pin & 0x0F00) >> PIN_SHIFT);
+}
+
+void gpio_init(gpio_t *obj, PinName pin, PinDirection direction) {
+    if(pin == NC) return;
+
+    obj->pin = pin;
+    LPC_GPIO_TypeDef *port_reg = ((LPC_GPIO_TypeDef *) (LPC_GPIO0_BASE + (((pin & 0xF000) >> PORT_SHIFT) * 0x10000)));
+    
+    obj->reg_mask_read = &port_reg->MASKED_ACCESS[1 << gpio_set(pin)];
+    obj->reg_dir       = &port_reg->DIR;
+    obj->reg_write     = &port_reg->DATA;
+    
+    gpio_dir(obj, direction);
+    
+    switch (direction) {
+        case PIN_OUTPUT: pin_mode(pin, PullNone); break;
+        case PIN_INPUT : pin_mode(pin, PullDown); break;
+    }
+}
+
+void gpio_mode(gpio_t *obj, PinMode mode) {
+    pin_mode(obj->pin, mode);
+}
+
+void gpio_dir(gpio_t *obj, PinDirection direction) {
+    int pin_number = ((obj->pin & 0x0F00) >> 8);
+    switch (direction) {
+        case PIN_INPUT : *obj->reg_dir &= ~(1 << pin_number); break;
+        case PIN_OUTPUT: *obj->reg_dir |=  (1 << pin_number); break;
+    }
+}