Diff: mbed-dev/targets/TARGET_NORDIC/TARGET_NRF5_SDK13/port_api.c

Revision:

18:6a4db94011d3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-dev/targets/TARGET_NORDIC/TARGET_NRF5_SDK13/port_api.c	Sun May 14 23:18:57 2017 +0000
@@ -0,0 +1,133 @@
+/* 
+ * Copyright (c) 2013 Nordic Semiconductor ASA
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ *   1. Redistributions of source code must retain the above copyright notice, this list 
+ *      of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form, except as embedded into a Nordic Semiconductor ASA 
+ *      integrated circuit in a product or a software update for such product, must reproduce 
+ *      the above copyright notice, this list of conditions and the following disclaimer in 
+ *      the documentation and/or other materials provided with the distribution.
+ *
+ *   3. Neither the name of Nordic Semiconductor ASA nor the names of its contributors may be 
+ *      used to endorse or promote products derived from this software without specific prior 
+ *      written permission.
+ *
+ *   4. This software, with or without modification, must only be used with a 
+ *      Nordic Semiconductor ASA integrated circuit.
+ *
+ *   5. Any software provided in binary or object form under this license must not be reverse 
+ *      engineered, decompiled, modified and/or disassembled. 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+
+#include "port_api.h"
+#include "pinmap.h"
+
+static NRF_GPIO_Type * const m_ports[] = GPIO_REG_LIST;
+
+#if defined(TARGET_MCU_NRF51822)
+    static const uint32_t m_gpio_pin_count[] = {31};
+#elif defined(TARGET_MCU_NRF52832)
+    static const uint32_t m_gpio_pin_count[] = {32};
+#elif defined(TARGET_MCU_NRF52840)
+    static const uint32_t m_gpio_pin_count[] = {32, 16};
+#else
+    #error not recognized gpio count for mcu
+#endif
+
+#define GPIO_PORT_COUNT (sizeof(m_gpio_pin_count)/sizeof(uint32_t))
+
+
+PinName port_pin(PortName port, int pin_n)
+{
+    return (PinName)NRF_GPIO_PIN_MAP(port, pin_n);
+}
+
+void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
+{
+    MBED_ASSERT((uint32_t)port < GPIO_PORT_COUNT);
+    
+    obj->port = port;
+    obj->mask = mask;
+
+    port_dir(obj, dir);
+}
+
+void port_mode(port_t *obj, PinMode mode)
+{
+    uint32_t i;
+    // The mode is set per pin: reuse pinmap logic
+    for (i = 0; i < m_gpio_pin_count[obj->port]; i++)
+    {
+        if (obj->mask & (1 << i))
+        {
+            pin_mode(port_pin(obj->port, i), mode);
+        }
+    }
+}
+
+void port_dir(port_t *obj, PinDirection dir)
+{
+    uint32_t i;
+    
+    volatile uint32_t *reg_cnf = (volatile uint32_t*) m_ports[obj->port]->PIN_CNF;
+
+    switch (dir)
+    {
+        case PIN_INPUT:
+
+            for (i = 0; i < m_gpio_pin_count[obj->port]; i++)
+            {
+                if (obj->mask & (1 << i))
+                {
+                    reg_cnf[i] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
+                                 | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
+                                 | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
+                                 | (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
+                }
+            }
+            break;
+
+        case PIN_OUTPUT:
+
+            for (i = 0; i < m_gpio_pin_count[obj->port]; i++)
+            {
+                if (obj->mask & (1 << i))
+                {
+                    reg_cnf[i] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
+                                 | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
+                                 | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
+                                 | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
+                                 | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
+                }
+            }
+            break;
+    }
+}
+
+void port_write(port_t *obj, int value)
+{
+    m_ports[obj->port]->OUTSET = value & obj->mask;
+    m_ports[obj->port]->OUTCLR = (~value) & obj->mask;
+}
+
+int port_read(port_t *obj)
+{
+    return ((m_ports[obj->port]->IN) & obj->mask);
+}