1 /*
2 * Copyright (c) 2006-2021, RT-Thread Development Team
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Change Logs:
7 * Date Author Notes
8 * 2017-09-16 Haley the first version
9 */
10
11 #include <rtthread.h>
12 #include <rtdevice.h>
13 #include <rthw.h>
14 #include "am_mcu_apollo.h"
15
16 #ifdef RT_USING_PIN
17
18 #define APLLO2_PIN_NUMBERS 64 //[34, 64]
19 struct rt_pin_irq_hdr am_pin_irq_hdr_tab[64];
20
am_pin_mode(rt_device_t dev,rt_base_t pin,rt_uint8_t mode)21 void am_pin_mode(rt_device_t dev, rt_base_t pin, rt_uint8_t mode)
22 {
23 if (mode == PIN_MODE_OUTPUT)
24 {
25 /* output setting */
26 am_hal_gpio_pin_config(pin, AM_HAL_GPIO_OUTPUT);
27 }
28 else if (mode == PIN_MODE_INPUT)
29 {
30 /* input setting: not pull. */
31 am_hal_gpio_pin_config(pin, AM_HAL_GPIO_INPUT);
32 }
33 else if (mode == PIN_MODE_INPUT_PULLUP)
34 {
35 /* input setting: pull up. */
36 am_hal_gpio_pin_config(pin, AM_HAL_GPIO_INPUT);
37 }
38 else if (mode == PIN_MODE_INPUT_PULLDOWN)
39 {
40 /* input setting: pull down. */
41 am_hal_gpio_pin_config(pin, AM_HAL_GPIO_OPENDRAIN);
42 }
43 else
44 {
45 /* input setting:default. */
46 am_hal_gpio_pin_config(pin, AM_HAL_GPIO_3STATE);
47 }
48 }
49
am_pin_write(rt_device_t dev,rt_base_t pin,rt_uint8_t value)50 void am_pin_write(rt_device_t dev, rt_base_t pin, rt_uint8_t value)
51 {
52 if (value == PIN_LOW)
53 {
54 am_hal_gpio_out_bit_clear(pin);
55 }
56 else if (value == PIN_HIGH)
57 {
58 am_hal_gpio_out_bit_set(pin);
59 }
60 }
61
am_pin_read(rt_device_t dev,rt_base_t pin)62 rt_ssize_t am_pin_read(rt_device_t dev, rt_base_t pin)
63 {
64 rt_ssize_t value = PIN_LOW;
65
66 if (am_hal_gpio_pin_config_read(pin) == AM_HAL_GPIO_OUTPUT)
67 {
68 if (am_hal_gpio_out_bit_read(pin) == 0)
69 {
70 value = PIN_LOW;
71 }
72 else
73 {
74 value = PIN_HIGH;
75 }
76 }
77 else
78 {
79 if (am_hal_gpio_input_bit_read(pin) == 0)
80 {
81 value = PIN_LOW;
82 }
83 else
84 {
85 value = PIN_HIGH;
86 }
87 }
88
89 return value;
90 }
91
am_pin_attach_irq(struct rt_device * device,rt_base_t pin,rt_uint8_t mode,void (* hdr)(void * args),void * args)92 rt_err_t am_pin_attach_irq(struct rt_device *device, rt_base_t pin,
93 rt_uint8_t mode, void (*hdr)(void *args), void *args)
94 {
95 rt_base_t level;
96 rt_int32_t irqindex = -1;
97
98 irqindex = pin;
99
100 level = rt_hw_interrupt_disable();
101 if(am_pin_irq_hdr_tab[irqindex].pin == pin &&
102 am_pin_irq_hdr_tab[irqindex].hdr == hdr &&
103 am_pin_irq_hdr_tab[irqindex].mode == mode &&
104 am_pin_irq_hdr_tab[irqindex].args == args
105 )
106 {
107 rt_hw_interrupt_enable(level);
108 return RT_EOK;
109 }
110 if(am_pin_irq_hdr_tab[irqindex].pin != -1)
111 {
112 rt_hw_interrupt_enable(level);
113 return -RT_EBUSY;
114 }
115 am_pin_irq_hdr_tab[irqindex].pin = pin;
116 am_pin_irq_hdr_tab[irqindex].hdr = hdr;
117 am_pin_irq_hdr_tab[irqindex].mode = mode;
118 am_pin_irq_hdr_tab[irqindex].args = args;
119 rt_hw_interrupt_enable(level);
120
121 return RT_EOK;
122 }
123
am_pin_dettach_irq(struct rt_device * device,rt_base_t pin)124 rt_err_t am_pin_dettach_irq(struct rt_device *device, rt_base_t pin)
125 {
126 rt_base_t level;
127 rt_int32_t irqindex = -1;
128
129 irqindex = pin;
130
131 level = rt_hw_interrupt_disable();
132 if(am_pin_irq_hdr_tab[irqindex].pin == -1)
133 {
134 rt_hw_interrupt_enable(level);
135 return RT_EOK;
136 }
137 am_pin_irq_hdr_tab[irqindex].pin = -1;
138 am_pin_irq_hdr_tab[irqindex].hdr = RT_NULL;
139 am_pin_irq_hdr_tab[irqindex].mode = 0;
140 am_pin_irq_hdr_tab[irqindex].args = RT_NULL;
141 rt_hw_interrupt_enable(level);
142
143 return RT_EOK;
144 }
145
am_pin_irq_enable(struct rt_device * device,rt_base_t pin,rt_uint8_t enabled)146 rt_err_t am_pin_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled)
147 {
148 rt_base_t level;
149 rt_int32_t irqindex = -1;
150
151 irqindex = pin;
152
153 if (enabled == PIN_IRQ_ENABLE)
154 {
155 level = rt_hw_interrupt_disable();
156
157 /* Configure the GPIO/button interrupt polarity */
158 if (am_pin_irq_hdr_tab[irqindex].mode == PIN_IRQ_MODE_RISING)
159 {
160 am_hal_gpio_int_polarity_bit_set(am_pin_irq_hdr_tab[irqindex].pin, AM_HAL_GPIO_RISING);
161 }
162 else if (am_pin_irq_hdr_tab[irqindex].mode == PIN_IRQ_MODE_FALLING)
163 {
164 am_hal_gpio_int_polarity_bit_set(am_pin_irq_hdr_tab[irqindex].pin, AM_HAL_GPIO_FALLING);
165 }
166
167 /* Clear the GPIO Interrupt (write to clear) */
168 am_hal_gpio_int_clear(AM_HAL_GPIO_BIT(am_pin_irq_hdr_tab[irqindex].pin));
169
170 /* Enable the GPIO/button interrupt */
171 am_hal_gpio_int_enable(AM_HAL_GPIO_BIT(am_pin_irq_hdr_tab[irqindex].pin));
172
173 rt_hw_interrupt_enable(level);
174 }
175 else if (enabled == PIN_IRQ_DISABLE)
176 {
177 if (am_hal_gpio_int_enable_get() != AM_HAL_GPIO_BIT(am_pin_irq_hdr_tab[irqindex].pin))
178 {
179 return -RT_ENOSYS;
180 }
181
182 /* Disable the GPIO/button interrupt */
183 am_hal_gpio_int_disable(AM_HAL_GPIO_BIT(am_pin_irq_hdr_tab[irqindex].pin));
184 }
185 else
186 {
187 return -RT_ENOSYS;
188 }
189
190 return RT_EOK;
191 }
192
193 const static struct rt_pin_ops am_pin_ops =
194 {
195 am_pin_mode,
196 am_pin_write,
197 am_pin_read,
198 am_pin_attach_irq,
199 am_pin_dettach_irq,
200 am_pin_irq_enable,
201 RT_NULL,
202 };
203
rt_hw_pin_init(void)204 int rt_hw_pin_init(void)
205 {
206 rt_device_pin_register("pin", &am_pin_ops, RT_NULL);
207
208 //rt_device_pin_irq_register("pin", &am_pin_ops, RT_NULL);
209 //rt_kprintf("pin_init!\n");
210
211 return 0;
212 }
213
214 INIT_BOARD_EXPORT(rt_hw_pin_init);
215 #endif
216
217 /*@}*/
218