Diff: targets/TARGET_Maxim/TARGET_MAX32620C/port_api.c

Revision:

186:707f6e361f3e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Maxim/TARGET_MAX32620C/port_api.c	Fri Jun 22 16:45:37 2018 +0100
@@ -0,0 +1,98 @@
+/*******************************************************************************
+ * Copyright (C) 2017 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 "port_api.h"
+#include "pinmap.h"
+#include "gpio_api.h"
+#include "gpio_regs.h"
+#include "clkman_regs.h"
+
+PinName port_pin(PortName port, int pin_n)
+{
+    return (PinName)((port << PORT_SHIFT) | pin_n);
+}
+
+void port_init(port_t *obj, PortName port, int mask, PinDirection direction)
+{
+    obj->port = port;
+    obj->mask = mask;
+    obj->reg_out = &MXC_GPIO->out_val[port];
+    obj->reg_in  = &MXC_GPIO->in_val[port];
+    obj->mode = PullDefault;
+
+    /* Ensure that the GPIO clock is enabled */
+    MXC_CLKMAN->sys_clk_ctrl_6_gpio = MXC_S_CLKMAN_CLK_SCALE_DIV_1;
+
+    uint32_t i;
+    // The function is set per pin: reuse gpio logic
+    for (i = 0; i < MXC_GPIO_MAX_PINS_PER_PORT; i++) {
+        if (obj->mask & (1 << i)) {
+            gpio_set(port_pin(obj->port, i));
+            pin_dir_mode(port_pin(obj->port, i), direction, obj->mode);
+        }
+    }
+}
+
+void port_mode(port_t *obj, PinMode mode)
+{
+    uint32_t i;
+    obj->mode = mode;
+    // The mode is set per pin: reuse pinmap logic
+    for (i = 0; i < MXC_GPIO_MAX_PINS_PER_PORT; i++) {
+        if (obj->mask & (1 << i)) {
+            pin_mode(port_pin(obj->port, i), mode);
+        }
+    }
+}
+
+void port_dir(port_t *obj, PinDirection direction)
+{
+    uint32_t i;
+    // The mode is set per pin: reuse gpio logic
+    for (i = 0; i < MXC_GPIO_MAX_PINS_PER_PORT; i++) {
+        if (obj->mask & (1 << i)) {
+            pin_dir_mode(port_pin(obj->port, i), direction, obj->mode);
+        }
+    }
+}
+
+void port_write(port_t *obj, int value)
+{
+    *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
+}
+
+int port_read(port_t *obj)
+{
+    return (*obj->reg_in & obj->mask);
+}
+