Diff: targets/hal/TARGET_Maxim/TARGET_MAX32600/pinmap.c

Revision:

514:7668256dbe61

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_Maxim/TARGET_MAX32600/pinmap.c	Thu Apr 16 11:45:13 2015 +0100
@@ -0,0 +1,105 @@
+/*******************************************************************************
+ * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
+ * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name of Maxim Integrated
+ * Products, Inc. shall not be used except as stated in the Maxim Integrated
+ * Products, Inc. Branding Policy.
+ *
+ * The mere transfer of this software does not imply any licenses
+ * of trade secrets, proprietary technology, copyrights, patents,
+ * trademarks, maskwork rights, or any other form of intellectual
+ * property whatsoever. Maxim Integrated Products, Inc. retains all
+ * ownership rights.
+ *******************************************************************************
+ */
+ 
+#include "mbed_assert.h"
+#include "pinmap.h"
+#include "objects.h"
+#include "gpio_regs.h"
+#include "ioman_regs.h"
+
+void pin_function(PinName name, int function)
+{
+    MBED_ASSERT(name != (PinName)NC);
+
+    if ((function >= 0) && (function <= 0xF)) {
+        unsigned int port = PINNAME_TO_PORT(name);
+        unsigned int pin = PINNAME_TO_PIN(name);
+        uint32_t temp = MXC_GPIO->func_sel[port] & ~(0xF << (pin*4));
+        MXC_GPIO->func_sel[port] = temp | ((uint32_t)function << (pin*4));
+    } else {
+        /* Assume this is a pointer to a pin function object */
+        pin_function_t *obj = (pin_function_t*)function;
+
+        if ((*obj->reg_ack & obj->ack_mask) != obj->req_val) {
+            /* Request pin mapping */
+            *obj->reg_req |= obj->req_val;
+
+            /* Check for acknowledgment */
+            MBED_ASSERT((*obj->reg_ack & obj->ack_mask) == obj->req_val);
+        }
+    }
+}
+
+void pin_mode(PinName name, PinMode mode)
+{
+    MBED_ASSERT(name != (PinName)NC);
+    unsigned int port = PINNAME_TO_PORT(name);
+    unsigned int pin = PINNAME_TO_PIN(name);
+
+    /* Must set mode while retaining direction */
+
+    /* Get the current direction */
+    uint32_t out_mode = MXC_GPIO->out_mode[port];
+    uint32_t curr_mode = (out_mode >> (pin*4)) & 0xF;
+    PinDirection dir = PIN_OUTPUT;
+    if ((curr_mode == MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP) || (curr_mode == MXC_V_GPIO_OUT_MODE_HIGH_Z)) {
+        dir = PIN_INPUT;
+    }
+
+    /* Set mode based on current direction */
+    uint32_t new_mode;
+    if (dir == PIN_OUTPUT) {
+        // PullUp      = not valid,
+        // OpenDrain   = MXC_V_GPIO_OUT_MODE_OD,
+        // PullNone    = MXC_V_GPIO_OUT_MODE_NORMAL,
+        if (mode == OpenDrain) {
+            new_mode = MXC_V_GPIO_OUT_MODE_OPEN_DRAIN;
+        } else {
+            new_mode = MXC_V_GPIO_OUT_MODE_NORMAL_DRIVE;
+        }
+    } else {
+        // PullUp      = MXC_V_GPIO_OUT_MODE_HIZPU,
+        // OpenDrain   = not valid,
+        // PullNone    = MXC_V_GPIO_OUT_MODE_HIZ,
+        if (mode == PullUp) {
+            new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP;
+        } else {
+            new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z;
+        }
+    }
+
+    /* Set new mode */
+    out_mode &= ~(0xF << (pin*4));
+    out_mode |= (new_mode << (pin*4));
+    MXC_GPIO->out_mode[port] = out_mode;
+}