1 /**************************************************************************//**
2 *
3 * @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
4 *
5 * SPDX-License-Identifier: Apache-2.0
6 *
7 * Change Logs:
8 * Date Author Notes
9 * 2020-1-16 Wayne First version
10 *
11 ******************************************************************************/
12
13 #include <rtconfig.h>
14
15 #if defined(NU_PKG_USING_ILI9341_SPI)
16
17 #include <rtdevice.h>
18 #include <lcd_ili9341.h>
19
20 #if !defined(NU_PKG_USING_ILI9341_SPI_CLK_FREQ)
21 #define NU_PKG_USING_ILI9341_SPI_CLK_FREQ 48000000
22 #endif
23
24 static struct rt_spi_device ili9341_spi_device;
25 static struct rt_spi_configuration ili9341_cfg =
26 {
27 .mode = RT_SPI_MODE_0 | RT_SPI_MSB,
28 .data_width = 8,
29 .max_hz = NU_PKG_USING_ILI9341_SPI_CLK_FREQ,
30 };
31
ili9341_change_datawidth(int data_width)32 static void ili9341_change_datawidth(int data_width)
33 {
34 if (ili9341_cfg.data_width != data_width)
35 {
36 ili9341_cfg.data_width = data_width;
37 rt_spi_configure(&ili9341_spi_device, &ili9341_cfg);
38 }
39 }
40
ili9341_send_cmd(rt_uint8_t cmd)41 void ili9341_send_cmd(rt_uint8_t cmd)
42 {
43 ili9341_change_datawidth(8);
44 CLR_RS;
45 rt_spi_transfer(&ili9341_spi_device, (const void *)&cmd, NULL, 1);
46 SET_RS;
47 }
48
ili9341_send_cmd_parameter(uint8_t data)49 void ili9341_send_cmd_parameter(uint8_t data)
50 {
51 ili9341_change_datawidth(8);
52 rt_spi_transfer(&ili9341_spi_device, (const void *)&data, NULL, 1);
53 }
54
ili9341_write_data_16bit(uint16_t data)55 static void ili9341_write_data_16bit(uint16_t data)
56 {
57 ili9341_change_datawidth(16);
58 rt_spi_transfer(&ili9341_spi_device, (const void *)&data, NULL, 2);
59 }
60
ili9341_send_pixel_data(rt_uint16_t pixel)61 void ili9341_send_pixel_data(rt_uint16_t pixel)
62 {
63 ili9341_write_data_16bit(pixel);
64 }
65
ili9341_send_pixels(rt_uint16_t * pixels,int len)66 void ili9341_send_pixels(rt_uint16_t *pixels, int len)
67 {
68 ili9341_change_datawidth(16);
69 rt_spi_transfer(&ili9341_spi_device, (const void *)pixels, NULL, len);
70 }
71
ili9341_spi_send_then_recv(struct rt_spi_device * device,const void * send_buf,rt_size_t send_length,void * recv_buf,rt_size_t recv_length)72 static rt_err_t ili9341_spi_send_then_recv(struct rt_spi_device *device,
73 const void *send_buf,
74 rt_size_t send_length,
75 void *recv_buf,
76 rt_size_t recv_length)
77 {
78 rt_err_t result;
79 struct rt_spi_message message;
80
81 RT_ASSERT(device != RT_NULL);
82 RT_ASSERT(device->bus != RT_NULL);
83
84 ili9341_change_datawidth(8);
85 result = rt_mutex_take(&(device->bus->lock), RT_WAITING_FOREVER);
86 if (result == RT_EOK)
87 {
88 if (device->bus->owner != device)
89 {
90 /* not the same owner as current, re-configure SPI bus */
91 result = device->bus->ops->configure(device, &device->config);
92 if (result == RT_EOK)
93 {
94 /* set SPI bus owner */
95 device->bus->owner = device;
96 }
97 else
98 {
99 /* configure SPI bus failed */
100 result = -RT_EIO;
101 goto __exit;
102 }
103 }
104
105 /* send data */
106 message.send_buf = send_buf;
107 message.recv_buf = RT_NULL;
108 message.length = send_length;
109 message.cs_take = 1;
110 message.cs_release = 0;
111 message.next = RT_NULL;
112
113 CLR_RS;
114 result = device->bus->ops->xfer(device, &message);
115 SET_RS;
116 if (result == 0)
117 {
118 result = -RT_EIO;
119 goto __exit;
120 }
121
122 /* recv data */
123 message.send_buf = RT_NULL;
124 message.recv_buf = recv_buf;
125 message.length = recv_length;
126 message.cs_take = 0;
127 message.cs_release = 1;
128 message.next = RT_NULL;
129
130 result = device->bus->ops->xfer(device, &message);
131 if (result == 0)
132 {
133 result = -RT_EIO;
134 goto __exit;
135 }
136
137 result = RT_EOK;
138 }
139 else
140 {
141 return -RT_EIO;
142 }
143
144 __exit:
145
146 rt_mutex_release(&(device->bus->lock));
147 return result;
148 }
149
ili9341_set_column(uint16_t StartCol,uint16_t EndCol)150 void ili9341_set_column(uint16_t StartCol, uint16_t EndCol)
151 {
152 ili9341_send_cmd(0x2A);
153 ili9341_write_data_16bit(StartCol);
154 ili9341_write_data_16bit(EndCol);
155 }
156
ili9341_set_page(uint16_t StartPage,uint16_t EndPage)157 void ili9341_set_page(uint16_t StartPage, uint16_t EndPage)
158 {
159 ili9341_send_cmd(0x2B);
160 ili9341_write_data_16bit(StartPage);
161 ili9341_write_data_16bit(EndPage);
162 }
163
ili9341_lcd_get_pixel(char * color,int x,int y)164 void ili9341_lcd_get_pixel(char *color, int x, int y)
165 {
166 uint8_t cmd;
167 typedef union
168 {
169 rt_uint32_t rgbx;
170 struct
171 {
172 rt_uint8_t x;
173 rt_uint8_t r;
174 rt_uint8_t g;
175 rt_uint8_t b;
176 } S;
177 } ili9341_pixel;
178 ili9341_pixel bgrx;
179
180 if (x >= XSIZE_PHYS || y >= YSIZE_PHYS)
181 {
182 *(rt_uint16_t *)color = 0;
183 return;
184 }
185
186 ili9341_set_column(x, x);
187 ili9341_set_page(y, y);
188
189 cmd = 0x2E;
190 ili9341_spi_send_then_recv(&ili9341_spi_device, &cmd, 1, &bgrx, 4);
191 //rt_kprintf("%08x.\n", bgrx);
192
193 // To RGB565
194 *(rt_uint16_t *)color = ((bgrx.S.r >> 3) << 11) | ((bgrx.S.g >> 2) << 5) | (bgrx.S.b >> 3);
195 }
196
rt_hw_lcd_ili9341_spi_init(const char * spibusname,void * pvUserData)197 rt_err_t rt_hw_lcd_ili9341_spi_init(const char *spibusname, void *pvUserData)
198 {
199 if (rt_spi_bus_attach_device(&ili9341_spi_device, "lcd_ili9341", spibusname, pvUserData) != RT_EOK)
200 return -RT_ERROR;
201
202 if (pvUserData != RT_NULL)
203 {
204 // GPIO CS pin mode to output */
205 rt_pin_mode(*((rt_base_t *)pvUserData), PIN_MODE_OUTPUT);
206 }
207
208 rt_kprintf("Preferred ili9341 spi clock frequency is %d Hz.\n", NU_PKG_USING_ILI9341_SPI_CLK_FREQ);
209
210 return rt_spi_configure(&ili9341_spi_device, &ili9341_cfg);
211 }
212
213 #endif /* #if defined(NU_PKG_USING_ILI9341_SPI) */
214