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LCD implementation.

This commit is contained in:
imi415 2021-03-21 01:23:19 +08:00
parent 28508e798c
commit 2f5b6f8d9b
Signed by: imi415
GPG Key ID: 17F01E106F9F5E0A
4 changed files with 108 additions and 33 deletions
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1
CMakeLists.txt
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@ -10,6 +10,7 @@ set(C_SOURCES
"src/drivers/user_gpio_driver.c"
"src/drivers/user_spi_driver.c"
"src/drivers/user_config_driver.c"
"src/impl/user_st7789_impl.c"
"src/impl/user_lvgl_impl.c"
"src/tasks/user_lvgl_task.c"
"src/utils/user_log_util.c"

22
include/impl/user_st7789_impl.h Normal file
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@ -0,0 +1,22 @@
#ifndef __USER_ST7789_IMPL_H
#define __USER_ST7789_IMPL_H
#include "drivers/user_gpio_driver.h"
#include "drivers/user_spi_driver.h"
#include "st7789_lcd.h"
typedef struct {
user_spi_driver_t *spi_driver;
user_gpio_t cs_gpio;
user_gpio_t dc_gpio;
user_gpio_t reset_gpio;
} user_st7789_impl_t;
int user_st7789_impl_init(void *handle, user_spi_driver_t *spi_driver);
st7789_ret_t user_st7789_impl_write_cmd(void *handle, uint8_t *cmd,
uint8_t len);
st7789_ret_t user_st7789_impl_write_data(void *handle,
uint8_t *data, uint32_t len);
st7789_ret_t user_st7789_impl_reset(void *handle);
#endif

41
src/impl/user_lvgl_impl.c
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@ -1,50 +1,25 @@
#include "lvgl.h"
#include "st7789_lcd.h"
#include "drivers/user_gpio_driver.h"
#include "drivers/user_spi_driver.h"
#include "impl/user_st7789_impl.h"
extern user_spi_driver_t g_spi;
st7789_ret_t _user_lvgl_impl_lcd_write_cmd(void *handle, uint8_t *cmd,
uint8_t len);
st7789_ret_t _user_lvgl_impl_lcd_write_data(void *handle, uint8_t *data,
uint32_t len);
st7789_ret_t _user_lvgl_impl_lcd_reset(void *handle);
user_st7789_impl_t g_lcd_impl;
st7789_lcd_t g_lcd = {
.cb =
{
.write_cmd_cb = _user_lvgl_impl_lcd_write_cmd,
.write_data_cb = _user_lvgl_impl_lcd_write_data,
.reset_cb = _user_lvgl_impl_lcd_reset,
.write_cmd_cb = user_st7789_impl_write_cmd,
.write_data_cb = user_st7789_impl_write_data,
.reset_cb = user_st7789_impl_reset,
},
.config =
{
.direction = ST7789_DIR_0,
.pix_fmt = ST7789_RGB888,
},
.user_data = &g_lcd_impl,
};
void user_lvgl_impl_init(void) {}
st7789_ret_t _user_lvgl_impl_lcd_write_cmd(void *handle, uint8_t *cmd,
uint8_t len) {
// TODO: Change CS and DC here
if(user_spi_driver_xfer(&g_spi, cmd, NULL, len) != USER_SPI_OK) {
return ST7789_ERROR;
}
void user_lvgl_impl_init(void) {
user_st7789_impl_init(&g_lcd_impl, &g_spi);
}
st7789_ret_t _user_lvgl_impl_lcd_write_data(void *handle, uint8_t *data,
uint32_t len) {
// TODO: Change CS and DC here
if(user_spi_driver_xfer(&g_spi, data, NULL, len) != USER_SPI_OK) {
return ST7789_ERROR;
}
}
st7789_ret_t _user_lvgl_impl_lcd_reset(void *handle) {
// Implement reset here.
}

77
src/impl/user_st7789_impl.c Normal file
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@ -0,0 +1,77 @@
#include <stdlib.h>
#include <unistd.h>
#include "lvgl.h"
#include "impl/user_st7789_impl.h"
int user_st7789_impl_init(void *handle, user_spi_driver_t *spi_driver) {
user_st7789_impl_t *impl = handle;
if(user_gpio_init(&impl->cs_gpio, "/dev/gpiochip0", 0) != USER_GPIO_OK)
return -1;
if(user_gpio_init(&impl->dc_gpio, "/dev/gpiochip0", 0) != USER_GPIO_OK)
return -2;
if(user_gpio_init(&impl->reset_gpio, "/dev/gpiochip0", 0) != USER_GPIO_OK)
return -3;
if(spi_driver == NULL) return -4;
impl->spi_driver = spi_driver;
return 0;
}
void user_st7789_impl_deinit(void *handle) {
user_st7789_impl_t *impl = handle;
user_gpio_deinit(&impl->cs_gpio);
user_gpio_deinit(&impl->dc_gpio);
user_gpio_deinit(&impl->reset_gpio);
}
st7789_ret_t user_st7789_impl_write_cmd(void *handle, uint8_t *cmd,
uint8_t len) {
user_st7789_impl_t *impl = handle;
if(user_gpio_set(&impl->dc_gpio, 0) != USER_GPIO_OK) return ST7789_ERROR;
if(user_gpio_set(&impl->cs_gpio, 0) != USER_GPIO_OK) return ST7789_ERROR;
// ST7789VW requires parameters to be sent with DC=0.
if(user_spi_driver_xfer(impl->spi_driver, cmd, NULL, len) != USER_SPI_OK) {
user_gpio_set(&impl->cs_gpio, 1);
return ST7789_ERROR;
}
if(user_gpio_set(&impl->cs_gpio, 1) != USER_GPIO_OK) return ST7789_ERROR;
return ST7789_OK;
}
st7789_ret_t user_st7789_impl_write_data(void *handle, uint8_t *data,
uint32_t len) {
user_st7789_impl_t *impl = handle;
if(user_gpio_set(&impl->dc_gpio, 1) != USER_GPIO_OK) return ST7789_ERROR;
if(user_gpio_set(&impl->cs_gpio, 0) != USER_GPIO_OK) return ST7789_ERROR;
if(user_spi_driver_xfer(impl->spi_driver, data, NULL, len) != USER_SPI_OK) {
user_gpio_set(&impl->cs_gpio, 1);
return ST7789_ERROR;
}
if(user_gpio_set(&impl->cs_gpio, 1) != USER_GPIO_OK) return ST7789_ERROR;
return ST7789_OK;
}
st7789_ret_t user_st7789_impl_reset(void *handle) {
user_st7789_impl_t *impl = handle;
if(&impl->reset_gpio == NULL) return ST7789_OK;
if(user_gpio_set(&impl->reset_gpio, 0) != USER_GPIO_OK) return ST7789_ERROR;
usleep(10 * 1000); // Sleep 10ms
if(user_gpio_set(&impl->cs_gpio, 1) != USER_GPIO_OK) return ST7789_ERROR;
}