Diff: targets/hal/TARGET_NXP/TARGET_LPC13XX/pinmap.c

Revision:

13:0645d8841f51

Parent:

10:3bc89ef62ce7

Child:

227:7bd0639b8911

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_NXP/TARGET_LPC13XX/pinmap.c	Mon Aug 05 14:12:34 2013 +0300
@@ -0,0 +1,55 @@
+/* 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 "pinmap.h"
+#include "error.h"
+
+#define LPC_IOCON0_BASE (LPC_IOCON_BASE)
+#define LPC_IOCON1_BASE (LPC_IOCON_BASE + 0x60)
+
+void pin_function(PinName pin, int function) {
+    if (pin == (uint32_t)NC) return;
+    
+    uint32_t pin_number = (uint32_t)pin;
+    
+    __IO uint32_t *reg = (pin_number < 32) ?
+            (__IO uint32_t*)(LPC_IOCON0_BASE + 4 * pin_number) :
+            (__IO uint32_t*)(LPC_IOCON1_BASE + 4 * (pin_number - 32));
+    
+    // pin function bits: [2:0] -> 111 = (0x7)
+    *reg = (*reg & ~0x7) | (function & 0x7);
+}
+
+void pin_mode(PinName pin, PinMode mode) {
+    if (pin == (uint32_t)NC) { return; }
+    
+    uint32_t pin_number = (uint32_t)pin;
+    uint32_t drain = ((uint32_t) mode & (uint32_t) OpenDrain) >> 2;
+    
+    __IO uint32_t *reg = (pin_number < 32) ?
+            (__IO uint32_t*)(LPC_IOCON0_BASE + 4 * pin_number) :
+            (__IO uint32_t*)(LPC_IOCON1_BASE + 4 * (pin_number - 32));
+    uint32_t tmp = *reg;
+    
+    // pin mode bits: [4:3] -> 11000 = (0x3 << 3)
+    tmp &= ~(0x3 << 3);
+    tmp |= (mode & 0x3) << 3;
+    
+    // drain
+    tmp &= ~(0x1 << 10);
+    tmp |= drain << 10;
+    
+    *reg = tmp;
+}