1 #include <rtthread.h>
2 #include "board.h"
3 #include "drv_led.h"
4
5
6 /**
7 *
8 * LED1 <==> GPIO1[11]
9 * LED2 <==> GPIO1[12]
10 *
11 **/
12
13 #define LED_NUM 2
14
15 #define LED1_PIN 11
16 #define LED1_PORT 1
17
18 #define LED2_PIN 12
19 #define LED2_PORT 1
20
21 struct led_ctrl
22 {
23 uint8_t num;
24 uint8_t port;
25 };
26
27 struct lpc_led
28 {
29 /* inherit from rt_device */
30 struct rt_device parent;
31
32 struct led_ctrl ctrl[LED_NUM];
33 };
34
35 static struct lpc_led led;
36
rt_led_init(rt_device_t dev)37 static rt_err_t rt_led_init(rt_device_t dev)
38 {
39 /* Enable clock and init GPIO outputs */
40 LPC_CCU1->CLK_M4_GPIO_CFG = CCU_CLK_CFG_AUTO | CCU_CLK_CFG_RUN;
41 while (!(LPC_CCU1->CLK_M4_GPIO_STAT & CCU_CLK_STAT_RUN));
42
43 /* set GPIO1[11] GPIO1[12] as GPIO. */
44 LPC_SCU->SFSP2_11 = 0; /* GPIO1[11] */
45 LPC_SCU->SFSP2_12 = 0; /* GPIO1[12] */
46 /* set GPIO1[11] GPIO1[12] output. */
47 LPC_GPIO_PORT->DIR[LED1_PORT] |= 0x01 << LED1_PIN;
48 LPC_GPIO_PORT->DIR[LED2_PORT] |= 0x01 << LED2_PIN;
49 /* turn off all the led */
50 LPC_GPIO_PORT->SET[LED1_PORT] |= 0x01 << LED1_PIN;
51 LPC_GPIO_PORT->SET[LED2_PORT] |= 0x01 << LED2_PIN;
52
53
54 led.ctrl[0].num = LED1_PIN;
55 led.ctrl[0].port = LED1_PORT;
56 led.ctrl[1].num = LED2_PIN;
57 led.ctrl[1].port = LED2_PORT;
58
59 return RT_EOK;
60 }
61
rt_led_open(rt_device_t dev,rt_uint16_t oflag)62 static rt_err_t rt_led_open(rt_device_t dev, rt_uint16_t oflag)
63 {
64 return RT_EOK;
65 }
66
rt_led_close(rt_device_t dev)67 static rt_err_t rt_led_close(rt_device_t dev)
68 {
69 return RT_EOK;
70 }
71
rt_led_read(rt_device_t dev,rt_off_t pos,void * buffer,rt_size_t size)72 static rt_ssize_t rt_led_read(rt_device_t dev, rt_off_t pos, void *buffer,
73 rt_size_t size)
74 {
75 rt_ubase_t index = 0;
76 rt_ubase_t nr = size;
77 rt_uint8_t *value = buffer;
78
79 RT_ASSERT(dev == &led.parent);
80 RT_ASSERT((pos + size) <= LED_NUM);
81
82 for (index = 0; index < nr; index++)
83 {
84 if ((LPC_GPIO_PORT->PIN[led.ctrl[pos + index].port] & (1 << led.ctrl[pos + index].num)) != 0)
85 {
86 *value = 0;
87 }
88 else
89 {
90 *value = 1;
91 }
92 value++;
93 }
94 return index;
95 }
96
rt_led_write(rt_device_t dev,rt_off_t pos,const void * buffer,rt_size_t size)97 static rt_ssize_t rt_led_write(rt_device_t dev, rt_off_t pos,
98 const void *buffer, rt_size_t size)
99 {
100 rt_ubase_t index = 0;
101 rt_ubase_t nw = size;
102 const rt_uint8_t *value = buffer;
103
104 RT_ASSERT(dev == &led.parent);
105 RT_ASSERT((pos + size) <= LED_NUM);
106
107 for (index = 0; index < nw; index++)
108 {
109 if (*value++)
110 {
111 LPC_GPIO_PORT->CLR[led.ctrl[pos + index].port] = (1 << led.ctrl[pos + index].num);
112 }
113 else
114 {
115 LPC_GPIO_PORT->SET[led.ctrl[pos + index].port] = (1 << led.ctrl[pos + index].num);
116 }
117 }
118 return index;
119 }
120
rt_led_control(rt_device_t dev,int cmd,void * args)121 static rt_err_t rt_led_control(rt_device_t dev, int cmd, void *args)
122 {
123 RT_ASSERT(dev == &led.parent);
124
125 if (cmd == LED_DEVICE_CTRL)
126 {
127 rt_uint32_t *led_num = args;
128 *led_num = LED_NUM;
129 }
130 return RT_EOK;
131 }
132
rt_led_hw_init(void)133 int rt_led_hw_init(void)
134 {
135 led.parent.type = RT_Device_Class_Char;
136 led.parent.rx_indicate = RT_NULL;
137 led.parent.tx_complete = RT_NULL;
138 led.parent.init = rt_led_init;
139 led.parent.open = rt_led_open;
140 led.parent.close = rt_led_close;
141 led.parent.read = rt_led_read;
142 led.parent.write = rt_led_write;
143 led.parent.control = rt_led_control;
144 led.parent.user_data = RT_NULL;
145
146 /* register a character device */
147 rt_device_register(&led.parent, "led", RT_DEVICE_FLAG_RDWR);
148 /* init led device */
149 rt_led_init(&led.parent);
150 return 0;
151 }
152 INIT_DEVICE_EXPORT(rt_led_hw_init);
153
154 #ifdef RT_USING_FINSH
155 #include <finsh.h>
led_test(rt_uint32_t led_num,rt_uint32_t value)156 void led_test(rt_uint32_t led_num, rt_uint32_t value)
157 {
158 rt_uint8_t led_value = value;
159 rt_led_write(&led.parent, led_num, &led_value, 1);
160 }
161 FINSH_FUNCTION_EXPORT(led_test, e.g: led_test(0, 100).)
162 #endif
163