1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
|
/*
* Copyright (c) 2017 Jan Van Winkel <jan.van_winkel@dxplore.eu>
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "display_ili9340.h"
#include <display.h>
//#define LOG_LEVEL CONFIG_DISPLAY_LOG_LEVEL
//#include <logging/log.h>
// LOG_MODULE_REGISTER(display_ili9340);
#define LOG_ERR printf
#define LOG_DBG printf
#define LOG_WRN printf
#include <drivers/gpio.h>
#include <sys/byteorder.h>
#include <drivers/spi.h>
#include <string.h>
#include <stdio.h>
struct ili9340_data {
struct device *reset_gpio;
struct device *command_data_gpio;
struct device *spi_dev;
struct spi_config spi_config;
#ifdef DT_ILITEK_ILI9340_0_CS_GPIO_CONTROLLER
struct spi_cs_control cs_ctrl;
#endif
};
struct ili9340_data ili9340_data1;
#define ILI9340_CMD_DATA_PIN_COMMAND 0
#define ILI9340_CMD_DATA_PIN_DATA 1
static void
ili9340_exit_sleep(struct ili9340_data *data)
{
ili9340_transmit(data, ILI9340_CMD_EXIT_SLEEP, NULL, 0);
// k_sleep(Z_TIMEOUT_MS(120));
}
int
ili9340_init()
{
struct ili9340_data *data = &ili9340_data1;
printf("Initializing display driver\n");
data->spi_dev = device_get_binding(DT_ILITEK_ILI9340_0_BUS_NAME);
if (data->spi_dev == NULL) {
return -EPERM;
}
data->spi_config.frequency = DT_ILITEK_ILI9340_0_SPI_MAX_FREQUENCY;
data->spi_config.operation =
SPI_OP_MODE_MASTER
| SPI_WORD_SET(8); // SPI_OP_MODE_MASTER | SPI_WORD_SET(8);
data->spi_config.slave = DT_ILITEK_ILI9340_0_BASE_ADDRESS;
#ifdef DT_ILITEK_ILI9340_0_CS_GPIO_CONTROLLER
data->cs_ctrl.gpio_dev =
device_get_binding(DT_ILITEK_ILI9340_0_CS_GPIO_CONTROLLER);
data->cs_ctrl.gpio_pin = DT_ILITEK_ILI9340_0_CS_GPIO_PIN;
data->cs_ctrl.delay = 0;
data->spi_config.cs = &(data->cs_ctrl);
#else
data->spi_config.cs = NULL;
#endif
data->reset_gpio =
device_get_binding(DT_ILITEK_ILI9340_0_RESET_GPIOS_CONTROLLER);
if (data->reset_gpio == NULL) {
return -EPERM;
}
gpio_pin_configure(data->reset_gpio, DT_ILITEK_ILI9340_0_RESET_GPIOS_PIN,
GPIO_OUTPUT);
data->command_data_gpio =
device_get_binding(DT_ILITEK_ILI9340_0_CMD_DATA_GPIOS_CONTROLLER);
if (data->command_data_gpio == NULL) {
return -EPERM;
}
gpio_pin_configure(data->command_data_gpio,
DT_ILITEK_ILI9340_0_CMD_DATA_GPIOS_PIN, GPIO_OUTPUT);
LOG_DBG("Resetting display driver\n");
gpio_pin_set(data->reset_gpio, DT_ILITEK_ILI9340_0_RESET_GPIOS_PIN, 1);
k_sleep(Z_TIMEOUT_MS(1));
gpio_pin_set(data->reset_gpio, DT_ILITEK_ILI9340_0_RESET_GPIOS_PIN, 0);
k_sleep(Z_TIMEOUT_MS(1));
gpio_pin_set(data->reset_gpio, DT_ILITEK_ILI9340_0_RESET_GPIOS_PIN, 1);
k_sleep(Z_TIMEOUT_MS(5));
LOG_DBG("Initializing LCD\n");
ili9340_lcd_init(data);
LOG_DBG("Exiting sleep mode\n");
ili9340_exit_sleep(data);
return 0;
}
static void
ili9340_set_mem_area(struct ili9340_data *data, const uint16_t x,
const uint16_t y, const uint16_t w, const uint16_t h)
{
uint16_t spi_data[2];
spi_data[0] = sys_cpu_to_be16(x);
spi_data[1] = sys_cpu_to_be16(x + w - 1);
ili9340_transmit(data, ILI9340_CMD_COLUMN_ADDR, &spi_data[0], 4);
spi_data[0] = sys_cpu_to_be16(y);
spi_data[1] = sys_cpu_to_be16(y + h - 1);
ili9340_transmit(data, ILI9340_CMD_PAGE_ADDR, &spi_data[0], 4);
}
static int
ili9340_write(const struct device *dev, const uint16_t x, const uint16_t y,
const struct display_buffer_descriptor *desc, const void *buf)
{
struct ili9340_data *data = (struct ili9340_data *)&ili9340_data1;
const uint8_t *write_data_start = (uint8_t *)buf;
struct spi_buf tx_buf;
struct spi_buf_set tx_bufs;
uint16_t write_cnt;
uint16_t nbr_of_writes;
uint16_t write_h;
__ASSERT(desc->width <= desc->pitch, "Pitch is smaller then width");
__ASSERT((3 * desc->pitch * desc->height) <= desc->buf_size,
"Input buffer to small");
ili9340_set_mem_area(data, x, y, desc->width, desc->height);
if (desc->pitch > desc->width) {
write_h = 1U;
nbr_of_writes = desc->height;
}
else {
write_h = desc->height;
nbr_of_writes = 1U;
}
ili9340_transmit(data, ILI9340_CMD_MEM_WRITE, (void *)write_data_start,
3 * desc->width * write_h);
tx_bufs.buffers = &tx_buf;
tx_bufs.count = 1;
write_data_start += (3 * desc->pitch);
for (write_cnt = 1U; write_cnt < nbr_of_writes; ++write_cnt) {
tx_buf.buf = (void *)write_data_start;
tx_buf.len = 3 * desc->width * write_h;
spi_transceive(data->spi_dev, &data->spi_config, &tx_bufs, NULL);
write_data_start += (3 * desc->pitch);
}
return 0;
}
static int
ili9340_read(const struct device *dev, const uint16_t x, const uint16_t y,
const struct display_buffer_descriptor *desc, void *buf)
{
LOG_ERR("Reading not supported\n");
return -ENOTSUP;
}
static void *
ili9340_get_framebuffer(const struct device *dev)
{
LOG_ERR("Direct framebuffer access not supported\n");
return NULL;
}
static int
ili9340_display_blanking_off(const struct device *dev)
{
struct ili9340_data *data = (struct ili9340_data *)dev->driver_data;
LOG_DBG("Turning display blanking off\n");
ili9340_transmit(data, ILI9340_CMD_DISPLAY_ON, NULL, 0);
return 0;
}
static int
ili9340_display_blanking_on(const struct device *dev)
{
struct ili9340_data *data = (struct ili9340_data *)dev->driver_data;
LOG_DBG("Turning display blanking on\n");
ili9340_transmit(data, ILI9340_CMD_DISPLAY_OFF, NULL, 0);
return 0;
}
static int
ili9340_set_brightness(const struct device *dev, const uint8_t brightness)
{
LOG_WRN("Set brightness not implemented\n");
return -ENOTSUP;
}
static int
ili9340_set_contrast(const struct device *dev, const uint8_t contrast)
{
LOG_ERR("Set contrast not supported\n");
return -ENOTSUP;
}
static int
ili9340_set_pixel_format(const struct device *dev,
const enum display_pixel_format pixel_format)
{
if (pixel_format == PIXEL_FORMAT_RGB_888) {
return 0;
}
LOG_ERR("Pixel format change not implemented\n");
return -ENOTSUP;
}
static int
ili9340_set_orientation(const struct device *dev,
const enum display_orientation orientation)
{
if (orientation == DISPLAY_ORIENTATION_NORMAL) {
return 0;
}
LOG_ERR("Changing display orientation not implemented\n");
return -ENOTSUP;
}
static void
ili9340_get_capabilities(const struct device *dev,
struct display_capabilities *capabilities)
{
memset(capabilities, 0, sizeof(struct display_capabilities));
capabilities->x_resolution = 320;
capabilities->y_resolution = 240;
capabilities->supported_pixel_formats = PIXEL_FORMAT_RGB_888;
capabilities->current_pixel_format = PIXEL_FORMAT_RGB_888;
capabilities->current_orientation = DISPLAY_ORIENTATION_NORMAL;
}
void
ili9340_transmit(struct ili9340_data *data, uint8_t cmd, void *tx_data,
size_t tx_len)
{
struct spi_buf tx_buf = { .buf = &cmd, .len = 1 };
struct spi_buf_set tx_bufs = { .buffers = &tx_buf, .count = 1 };
data = (struct ili9340_data *)&ili9340_data1;
gpio_pin_set(data->command_data_gpio,
DT_ILITEK_ILI9340_0_CMD_DATA_GPIOS_PIN,
ILI9340_CMD_DATA_PIN_COMMAND);
spi_transceive(data->spi_dev, &data->spi_config, &tx_bufs, NULL);
if (tx_data != NULL) {
tx_buf.buf = tx_data;
tx_buf.len = tx_len;
gpio_pin_set(data->command_data_gpio,
DT_ILITEK_ILI9340_0_CMD_DATA_GPIOS_PIN,
ILI9340_CMD_DATA_PIN_DATA);
spi_transceive(data->spi_dev, &data->spi_config, &tx_bufs, NULL);
}
}
struct display_driver_api ili9340_api1 = {
.blanking_on = ili9340_display_blanking_on,
.blanking_off = ili9340_display_blanking_off,
.write = ili9340_write,
.read = ili9340_read,
.get_framebuffer = ili9340_get_framebuffer,
.set_brightness = ili9340_set_brightness,
.set_contrast = ili9340_set_contrast,
.get_capabilities = ili9340_get_capabilities,
.set_pixel_format = ili9340_set_pixel_format,
.set_orientation = ili9340_set_orientation
};
/*
DEVICE_AND_API_INIT(ili9340, DT_ILITEK_ILI9340_0_LABEL, &ili9340_init,
&ili9340_data, NULL, APPLICATION,
CONFIG_APPLICATION_INIT_PRIORITY, &ili9340_api);
*/
|
