Diff: targets/hal/TARGET_Atmel/TARGET_SAM_CortexM0P/port_api.c

Revision:

15:a81a8d6c1dfe

Child:

18:da299f395b9e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_Atmel/TARGET_SAM_CortexM0P/port_api.c	Wed Nov 04 16:30:11 2015 +0000
@@ -0,0 +1,176 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2015 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 "port_api.h"
+#include "pinmap.h"
+#include "gpio_api.h"
+#include "port.h"
+
+#if defined(TARGET_SAMR21G18A)
+#define PORTA_MASK	0xDBDFFFF3  // mask for available pins in Port A
+#define PORTB_MASK	0xC0C3C30D  // mask for available pins in Port B
+#define PORTC_MASK	0x000D0000  // mask for available pins in Port C
+#elif defined(TARGET_SAMD21J18A)
+#define PORTA_MASK  0xDBFFFFFF  // mask for available pins in Port A
+#define PORTB_MASK  0xC0C3FFFF  // mask for available pins in Port B
+#elif defined(TARGET_SAMD21G18A)
+#define PORTA_MASK  0xDBFFFFFF  // mask for available pins in Port A
+#define PORTB_MASK  0x00C00F0C  // mask for available pins in Port B
+#else
+#endif
+
+uint32_t start_pin(PortName port)
+{
+    if(port < PortMax) { /* PortC value is 2*/
+        return port * 32;
+    } else {
+        return NC;
+    }
+}
+void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
+{
+    MBED_ASSERT(obj);
+    struct port_config pin_conf;
+    int i, j;
+    int start;
+
+    port_get_config_defaults(&pin_conf);
+    switch (dir) {
+        case PIN_INPUT :
+            pin_conf.direction  = PORT_PIN_DIR_INPUT;
+            break;
+        case PIN_OUTPUT:
+            pin_conf.direction  = PORT_PIN_DIR_OUTPUT;
+            break;
+        case PIN_INPUT_OUTPUT:
+            pin_conf.direction  = PORT_PIN_DIR_OUTPUT_WTH_READBACK;
+            break;
+        default:
+            return;
+    }
+
+    PortGroup *const port_base = (PortGroup*)port_get_group_from_gpio_pin(port * 32);  // 32 pins in port // function reused to get the port base
+    if(port_base == NULL) return; /* returns NULL if invalid*/
+    switch (port) {
+        case PortA:
+            obj->mask = (uint32_t)mask & PORTA_MASK;
+            break;
+        case PortB:
+            obj->mask = (uint32_t)mask & PORTB_MASK;
+            break;
+#if defined(TARGET_SAMR21G18A)
+        case PortC:
+            obj->mask = (uint32_t)mask & PORTC_MASK;
+            break;
+#endif
+        default:
+            return;
+    }
+    start = start_pin(port);
+    if(start == NC)
+        return;
+    obj->port = port;
+    obj->direction = dir;
+    obj->powersave = pin_conf.powersave;
+    obj->mode = PORT_PIN_PULL_UP;
+
+    for (i = start, j = 0; j < 32; i++, j++) {
+        if (obj->mask & (1<<j)) {
+            port_pin_set_config((PinName)i, &pin_conf);
+        }
+    }
+    obj->OUTCLR = &port_base->OUTCLR.reg;
+    obj->OUTSET = &port_base->OUTSET.reg;
+    obj->IN = &port_base->IN.reg;
+    obj->OUT = &port_base->OUT.reg;
+}
+
+void port_mode(port_t *obj, PinMode mode)
+{
+    MBED_ASSERT(obj);
+    int i, j;
+    int start;
+    start = start_pin(obj->port);
+    if(start == NC)
+        return;
+    for (i = start, j = 0; j < 32; i++, j++) {
+        if (obj->mask & (1<<j)) {
+            pin_mode((PinName)i , mode);
+        }
+    }
+}
+
+void port_dir(port_t *obj, PinDirection dir)
+{
+    MBED_ASSERT(obj);
+    struct port_config pin_conf;
+    int i, j;
+    int start;
+
+    switch (dir) {
+        case PIN_INPUT :
+            pin_conf.direction  = PORT_PIN_DIR_INPUT;
+            break;
+        case PIN_OUTPUT:
+            pin_conf.direction  = PORT_PIN_DIR_OUTPUT;
+            break;
+        case PIN_INPUT_OUTPUT:
+            pin_conf.direction  = PORT_PIN_DIR_OUTPUT_WTH_READBACK;
+            break;
+        default:
+            return;
+    }
+    start = start_pin(obj->port);
+    if(start == NC)
+        return;
+    obj->direction = dir;
+    pin_conf.input_pull = obj->mode;
+    pin_conf.powersave  = obj->powersave;
+
+    for (i = start, j = 0; j < 32; i++, j++) {
+        if (obj->mask & (1<<j)) {
+            port_pin_set_config((PinName)i, &pin_conf);
+        }
+    }
+}
+
+void port_write(port_t *obj, int value)
+{
+    MBED_ASSERT(obj);
+    int i;
+    int start;
+    start = start_pin(obj->port);
+    if(start == NC)
+        return;
+    for (i = 0; i < 32 ; i++) {
+        if (obj->mask & (1<<i)) {
+            if (value & (1<<i)) {
+                *obj->OUTSET = 1 << i;
+            } else {
+                *obj->OUTCLR = 1 << i;
+            }
+        }
+    }
+}
+
+int port_read(port_t *obj)
+{
+    MBED_ASSERT(obj);
+    if (obj->direction == PIN_OUTPUT) {
+        return (*obj->OUT & obj->mask);
+    } else {
+        return (*obj->IN & obj->mask);
+    }
+}