lvgl_esp32_drivers/lvgl_tft/sh1107.c

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/**
* @file sh1107.c
*
*/
/*********************
* INCLUDES
*********************/
#include "sh1107.h"
#include "disp_spi.h"
#include "driver/gpio.h"
#include "esp_log.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/*The LCD needs a bunch of command/argument values to be initialized. They are stored in this struct. */
typedef struct {
uint8_t cmd;
uint8_t data[16];
uint8_t databytes; //No of data in data; bit 7 = delay after set; 0xFF = end of cmds.
} lcd_init_cmd_t;
/**********************
* STATIC PROTOTYPES
**********************/
static void sh1107_send_cmd(uint8_t cmd);
static void sh1107_send_data(void * data, uint16_t length);
static void sh1107_send_color(void * data, uint16_t length);
/**********************
* STATIC VARIABLES
**********************/
/**********************
* MACROS
**********************/
#define BIT_SET(a,b) ((a) |= (1U<<(b)))
#define BIT_CLEAR(a,b) ((a) &= ~(1U<<(b)))
/**********************
* GLOBAL FUNCTIONS
**********************/
void sh1107_init(void)
{
// Use Double Bytes Commands if necessary, but not Command+Data
// Initialization taken from https://github.com/nopnop2002/esp-idf-m5stick
lcd_init_cmd_t init_cmds[]={
{0xAE, {0}, 0}, // Turn display off
{0xDC, {0}, 0}, // Set display start line
{0x00, {0}, 0}, // ...value
{0x81, {0}, 0}, // Set display contrast
{0x2F, {0}, 0}, // ...value
{0x20, {0}, 0}, // Set memory mode
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{0xA0, {0}, 0}, // Non-rotated display
#if defined CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE
{0xC8, {0}, 0}, // flipped vertical
#elif defined CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT
{0xC7, {0}, 0}, // flipped vertical
#endif
{0xA8, {0}, 0}, // Set multiplex ratio
{0x7F, {0}, 0}, // ...value
{0xD3, {0}, 0}, // Set display offset to zero
{0x60, {0}, 0}, // ...value
{0xD5, {0}, 0}, // Set display clock divider
{0x51, {0}, 0}, // ...value
{0xD9, {0}, 0}, // Set pre-charge
{0x22, {0}, 0}, // ...value
{0xDB, {0}, 0}, // Set com detect
{0x35, {0}, 0}, // ...value
{0xB0, {0}, 0}, // Set page address
{0xDA, {0}, 0}, // Set com pins
{0x12, {0}, 0}, // ...value
{0xA4, {0}, 0}, // output ram to display
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#if defined CONFIG_LV_INVERT_COLORS
{0xA7, {0}, 0}, // inverted display
#else
{0xA6, {0}, 0}, // Non-inverted display
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#endif
{0xAF, {0}, 0}, // Turn display on
{0, {0}, 0xff},
};
//Initialize non-SPI GPIOs
gpio_pad_select_gpio(SH1107_DC);
gpio_set_direction(SH1107_DC, GPIO_MODE_OUTPUT);
#if SH1107_USE_RST
gpio_pad_select_gpio(SH1107_RST);
gpio_set_direction(SH1107_RST, GPIO_MODE_OUTPUT);
//Reset the display
gpio_set_level(SH1107_RST, 0);
vTaskDelay(100 / portTICK_RATE_MS);
gpio_set_level(SH1107_RST, 1);
vTaskDelay(100 / portTICK_RATE_MS);
#endif
//Send all the commands
uint16_t cmd = 0;
while (init_cmds[cmd].databytes!=0xff) {
sh1107_send_cmd(init_cmds[cmd].cmd);
sh1107_send_data(init_cmds[cmd].data, init_cmds[cmd].databytes&0x1F);
if (init_cmds[cmd].databytes & 0x80) {
vTaskDelay(100 / portTICK_RATE_MS);
}
cmd++;
}
}
void sh1107_set_px_cb(struct _disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
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lv_color_t color, lv_opa_t opa)
{
/* buf_w will be ignored, the configured CONFIG_LV_DISPLAY_HEIGHT and _WIDTH,
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and CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE and _PORTRAIT will be used. */
uint16_t byte_index = 0;
uint8_t bit_index = 0;
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#if defined CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE
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byte_index = y + (( x>>3 ) * LV_VER_RES_MAX);
bit_index = x & 0x7;
#elif defined CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT
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byte_index = x + (( y>>3 ) * LV_HOR_RES_MAX);
bit_index = y & 0x7;
#endif
if ((color.full == 0) && (LV_OPA_TRANSP != opa)) {
BIT_SET(buf[byte_index], bit_index);
} else {
BIT_CLEAR(buf[byte_index], bit_index);
}
}
void sh1107_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map)
{
uint8_t columnLow = area->x1 & 0x0F;
uint8_t columnHigh = (area->x1 >> 4) & 0x0F;
uint8_t row1 = 0, row2 = 0;
uint32_t size = 0;
void *ptr;
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#if defined CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE
row1 = area->x1>>3;
row2 = area->x2>>3;
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#else
row1 = area->y1>>3;
row2 = area->y2>>3;
#endif
for(int i = row1; i < row2+1; i++){
sh1107_send_cmd(0x10 | columnHigh); // Set Higher Column Start Address for Page Addressing Mode
sh1107_send_cmd(0x00 | columnLow); // Set Lower Column Start Address for Page Addressing Mode
sh1107_send_cmd(0xB0 | i); // Set Page Start Address for Page Addressing Mode
size = area->y2 - area->y1 + 1;
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#if defined CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE
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ptr = color_map + i * LV_VER_RES_MAX;
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#else
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ptr = color_map + i * LV_HOR_RES_MAX;
#endif
if(i != row2){
sh1107_send_data( (void *) ptr, size);
} else {
// complete sending data by sh1107_send_color() and thus call lv_flush_ready()
sh1107_send_color( (void *) ptr, size);
}
}
}
void sh1107_rounder(struct _disp_drv_t * disp_drv, lv_area_t *area)
{
// workaround: always send complete size display buffer
area->x1 = 0;
area->y1 = 0;
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area->x2 = LV_HOR_RES_MAX-1;
area->y2 = LV_VER_RES_MAX-1;
}
void sh1107_sleep_in()
{
sh1107_send_cmd(0xAE);
}
void sh1107_sleep_out()
{
sh1107_send_cmd(0xAF);
}
/**********************
* STATIC FUNCTIONS
**********************/
static void sh1107_send_cmd(uint8_t cmd)
{
disp_wait_for_pending_transactions();
gpio_set_level(SH1107_DC, 0); /*Command mode*/
disp_spi_send_data(&cmd, 1);
}
static void sh1107_send_data(void * data, uint16_t length)
{
disp_wait_for_pending_transactions();
gpio_set_level(SH1107_DC, 1); /*Data mode*/
disp_spi_send_data(data, length);
}
static void sh1107_send_color(void * data, uint16_t length)
{
disp_wait_for_pending_transactions();
gpio_set_level(SH1107_DC, 1); /*Data mode*/
disp_spi_send_colors(data, length);
}