Diff: targets/TARGET_Realtek/TARGET_AMEBA/gpio_api.c

Revision:

167:e84263d55307

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Realtek/TARGET_AMEBA/gpio_api.c	Wed Jun 21 17:46:44 2017 +0100
@@ -0,0 +1,202 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2013-2016 Realtek Semiconductor Corp.
+ *
+ * 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 "objects.h"
+#include "pinmap.h"
+
+#if CONFIG_GPIO_EN
+
+#include "gpio_api.h"
+
+// convert Mbed pin mode to HAL Pin Mode
+const u8 GPIO_InPinMode[] = {
+    DIN_PULL_NONE,      // PullNone
+    DIN_PULL_HIGH,      // PullUp
+    DIN_PULL_LOW,       // PullDown
+    DIN_PULL_NONE       // OpenDrain
+};
+
+const u8 GPIO_SWPORT_DR_TBL[] = {
+    GPIO_PORTA_DR,
+    GPIO_PORTB_DR,
+    GPIO_PORTC_DR
+};
+
+const u8 GPIO_EXT_PORT_TBL[] = {
+    GPIO_EXT_PORTA,
+    GPIO_EXT_PORTB,
+    GPIO_EXT_PORTC
+};
+
+const u8 GPIO_SWPORT_DDR_TBL[] = {
+    GPIO_PORTA_DDR,
+    GPIO_PORTB_DDR,
+    GPIO_PORTC_DDR
+};
+
+void gpio_set_hal_pin_mode(gpio_t *obj)
+{
+    uint32_t mode;
+
+    mode = obj->mode;
+    if (obj->direction == PIN_OUTPUT) {
+        if (mode == OpenDrain) {
+            obj->hal_pin.pin_mode = DOUT_OPEN_DRAIN;
+        } else {
+            obj->hal_pin.pin_mode = DOUT_PUSH_PULL;
+        }
+    } else {
+        if (mode < 4) {
+            obj->hal_pin.pin_mode = GPIO_InPinMode[mode];
+        } else {
+            obj->hal_pin.pin_mode = DIN_PULL_NONE;
+        }
+    }
+}
+
+uint32_t gpio_set(PinName pin) 
+{
+    u32 ip_pin;
+    
+    DBG_ASSERT(pin != (PinName)NC);
+    pin_function(pin, 0);
+    ip_pin = HAL_GPIO_GetPinName((u32)pin);
+    
+    return ip_pin;
+}
+
+void gpio_init(gpio_t *obj, PinName pin) 
+{
+    uint32_t pin_name;
+
+    if (pin == (PinName)NC)
+        return;
+
+    obj->pin = pin;
+    obj->mode = PullNone;
+    obj->direction = PIN_INPUT;
+    pin_name = gpio_set(pin); // get the IP pin name
+    obj->hal_pin.pin_name = pin_name;
+    obj->hal_pin.pin_mode = DIN_PULL_NONE;
+    obj->hal_port_num = HAL_GPIO_GET_PORT_BY_NAME(pin_name);
+    obj->hal_pin_num = HAL_GPIO_GET_PIN_BY_NAME(pin_name);
+    HAL_GPIO_Init(&obj->hal_pin);
+}
+
+void gpio_mode(gpio_t *obj, PinMode mode) 
+{
+    obj->mode = mode;
+    gpio_set_hal_pin_mode(obj);    
+    HAL_GPIO_Init(&obj->hal_pin);
+}
+
+// Initial the Pin direction
+void gpio_dir(gpio_t *obj, PinDirection direction)
+{
+    obj->direction = direction;
+    gpio_set_hal_pin_mode(obj);
+    HAL_GPIO_Init(&obj->hal_pin);
+}
+
+// Change the pin direction directly
+void gpio_change_dir(gpio_t *obj, PinDirection direction)
+{
+    uint32_t reg_value;
+    uint8_t port_num;
+    uint8_t pin_num;
+
+    obj->direction = direction;
+    gpio_set_hal_pin_mode(obj);
+    port_num = obj->hal_port_num;
+    pin_num = obj->hal_pin_num;
+
+    reg_value =  HAL_READ32(GPIO_REG_BASE, GPIO_SWPORT_DDR_TBL[port_num]);
+    if (direction) {
+        // Out
+        reg_value |= (1 << pin_num);
+    } else {
+        // In
+        reg_value &= ~(1 << pin_num);
+    }
+    HAL_WRITE32(GPIO_REG_BASE, GPIO_SWPORT_DDR_TBL[port_num], reg_value);
+}
+
+void gpio_write(gpio_t *obj, int value) 
+{
+    HAL_GPIO_PIN  *hal_pin=&obj->hal_pin;
+    volatile uint32_t reg_value;
+    uint8_t port_num;
+    uint8_t pin_num;
+    
+    if (hal_pin->pin_mode != DOUT_OPEN_DRAIN) {
+        port_num = obj->hal_port_num;
+        pin_num = obj->hal_pin_num;
+        
+        reg_value =  HAL_READ32(GPIO_REG_BASE, GPIO_SWPORT_DR_TBL[port_num]);
+        reg_value &= ~(1 << pin_num);
+        reg_value |= ((value&0x01)<< pin_num);
+        HAL_WRITE32(GPIO_REG_BASE, GPIO_SWPORT_DR_TBL[port_num], reg_value);            
+    } else {
+        HAL_GPIO_WritePin(&obj->hal_pin, value);
+    }
+}
+
+int gpio_read(gpio_t *obj)
+{
+    volatile uint32_t reg_value;
+    uint8_t port_num;
+    uint8_t pin_num;
+    HAL_GPIO_PIN_MODE pin_mode;
+
+    port_num = obj->hal_port_num;
+    pin_num = obj->hal_pin_num;
+    pin_mode = obj->hal_pin.pin_mode;
+
+    reg_value =  HAL_READ32(GPIO_REG_BASE, GPIO_EXT_PORT_TBL[port_num]);
+    if (pin_mode != DOUT_OPEN_DRAIN) {
+        return ((reg_value >> pin_num) & 0x01);
+    } else {
+        return (!((reg_value >> pin_num) & 0x01));
+    }    
+}
+
+// This API only works for non-Open-Drain pin
+void gpio_direct_write(gpio_t *obj, BOOL value) 
+{
+    uint8_t port_num;
+    uint8_t pin_num;
+    uint32_t reg_value;
+
+    port_num = obj->hal_port_num;
+    pin_num = obj->hal_pin_num;
+
+    reg_value =  HAL_READ32(GPIO_REG_BASE, GPIO_SWPORT_DR_TBL[port_num]);
+    reg_value &= ~(1 << pin_num);
+    reg_value |= (value<< pin_num);
+    HAL_WRITE32(GPIO_REG_BASE, GPIO_SWPORT_DR_TBL[port_num], reg_value);
+}
+
+void gpio_pull_ctrl(gpio_t *obj, PinMode pull_type)
+{
+    HAL_GPIO_PullCtrl((u32) obj->pin, (u32)pull_type);
+}
+
+
+void gpio_deinit(gpio_t *obj)
+{
+    HAL_GPIO_DeInit(&obj->hal_pin);
+}
+
+#endif