222 lines
6.1 KiB
C
222 lines
6.1 KiB
C
/**
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* @file sh1107.c
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*
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*/
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/*********************
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* INCLUDES
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*********************/
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#include "sh1107.h"
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#include "disp_spi.h"
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#include "driver/gpio.h"
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#include "esp_log.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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/*********************
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* DEFINES
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*********************/
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#define TAG "SH1107"
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/**********************
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* TYPEDEFS
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**********************/
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/*The LCD needs a bunch of command/argument values to be initialized. They are stored in this struct. */
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typedef struct {
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uint8_t cmd;
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uint8_t data[16];
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uint8_t databytes; //No of data in data; bit 7 = delay after set; 0xFF = end of cmds.
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} lcd_init_cmd_t;
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/**********************
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* STATIC PROTOTYPES
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**********************/
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static void sh1107_send_cmd(uint8_t cmd);
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static void sh1107_send_data(void * data, uint16_t length);
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static void sh1107_send_color(void * data, uint16_t length);
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/**********************
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* STATIC VARIABLES
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**********************/
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/**********************
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* MACROS
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**********************/
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#define BIT_SET(a,b) ((a) |= (1U<<(b)))
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#define BIT_CLEAR(a,b) ((a) &= ~(1U<<(b)))
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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void sh1107_init(void)
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{
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// Use Double Bytes Commands if necessary, but not Command+Data
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// Initialization taken from https://github.com/nopnop2002/esp-idf-m5stick
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lcd_init_cmd_t init_cmds[]={
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{0xAE, {0}, 0}, // Turn display off
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{0xDC, {0}, 0}, // Set display start line
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{0x00, {0}, 0}, // ...value
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{0x81, {0}, 0}, // Set display contrast
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{0x2F, {0}, 0}, // ...value
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{0x20, {0}, 0}, // Set memory mode
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{0xA0, {0}, 0}, // Non-rotated display
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#if defined CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE
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{0xC8, {0}, 0}, // flipped vertical
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#elif defined CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT
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{0xC7, {0}, 0}, // flipped vertical
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#endif
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{0xA8, {0}, 0}, // Set multiplex ratio
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{0x7F, {0}, 0}, // ...value
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{0xD3, {0}, 0}, // Set display offset to zero
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{0x60, {0}, 0}, // ...value
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{0xD5, {0}, 0}, // Set display clock divider
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{0x51, {0}, 0}, // ...value
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{0xD9, {0}, 0}, // Set pre-charge
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{0x22, {0}, 0}, // ...value
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{0xDB, {0}, 0}, // Set com detect
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{0x35, {0}, 0}, // ...value
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{0xB0, {0}, 0}, // Set page address
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{0xDA, {0}, 0}, // Set com pins
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{0x12, {0}, 0}, // ...value
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{0xA4, {0}, 0}, // output ram to display
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#if defined CONFIG_LV_INVERT_COLORS
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{0xA7, {0}, 0}, // inverted display
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#else
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{0xA6, {0}, 0}, // Non-inverted display
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#endif
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{0xAF, {0}, 0}, // Turn display on
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{0, {0}, 0xff},
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};
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//Initialize non-SPI GPIOs
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gpio_reset_pin(SH1107_DC);
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gpio_set_direction(SH1107_DC, GPIO_MODE_OUTPUT);
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#if SH1107_USE_RST
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gpio_reset_pin(SH1107_RST);
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gpio_set_direction(SH1107_RST, GPIO_MODE_OUTPUT);
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//Reset the display
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gpio_set_level(SH1107_RST, 0);
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vTaskDelay(100 / portTICK_PERIOD_MS);
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gpio_set_level(SH1107_RST, 1);
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vTaskDelay(100 / portTICK_PERIOD_MS);
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#endif
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//Send all the commands
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uint16_t cmd = 0;
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while (init_cmds[cmd].databytes!=0xff) {
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sh1107_send_cmd(init_cmds[cmd].cmd);
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sh1107_send_data(init_cmds[cmd].data, init_cmds[cmd].databytes&0x1F);
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if (init_cmds[cmd].databytes & 0x80) {
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vTaskDelay(100 / portTICK_PERIOD_MS);
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}
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cmd++;
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}
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}
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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)
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{
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/* 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. */
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uint16_t byte_index = 0;
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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);
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bit_index = x & 0x7;
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#elif defined CONFIG_LV_DISPLAY_ORIENTATION_PORTRAIT
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byte_index = x + (( y>>3 ) * LV_HOR_RES_MAX);
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bit_index = y & 0x7;
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#endif
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if ((color.full == 0) && (LV_OPA_TRANSP != opa)) {
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BIT_SET(buf[byte_index], bit_index);
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} else {
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BIT_CLEAR(buf[byte_index], bit_index);
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}
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}
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void sh1107_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map)
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{
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uint8_t columnLow = area->x1 & 0x0F;
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uint8_t columnHigh = (area->x1 >> 4) & 0x0F;
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uint8_t row1 = 0, row2 = 0;
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uint32_t size = 0;
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void *ptr;
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#if defined CONFIG_LV_DISPLAY_ORIENTATION_LANDSCAPE
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row1 = area->x1>>3;
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row2 = area->x2>>3;
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#else
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row1 = area->y1>>3;
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row2 = area->y2>>3;
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#endif
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for(int i = row1; i < row2+1; i++){
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sh1107_send_cmd(0x10 | columnHigh); // Set Higher Column Start Address for Page Addressing Mode
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sh1107_send_cmd(0x00 | columnLow); // Set Lower Column Start Address for Page Addressing Mode
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sh1107_send_cmd(0xB0 | i); // Set Page Start Address for Page Addressing Mode
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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;
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#endif
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if(i != row2){
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sh1107_send_data( (void *) ptr, size);
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} else {
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// complete sending data by sh1107_send_color() and thus call lv_flush_ready()
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sh1107_send_color( (void *) ptr, size);
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}
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}
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}
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void sh1107_rounder(struct _disp_drv_t * disp_drv, lv_area_t *area)
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{
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// workaround: always send complete size display buffer
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area->x1 = 0;
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area->y1 = 0;
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area->x2 = LV_HOR_RES_MAX-1;
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area->y2 = LV_VER_RES_MAX-1;
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}
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void sh1107_sleep_in()
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{
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sh1107_send_cmd(0xAE);
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}
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void sh1107_sleep_out()
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{
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sh1107_send_cmd(0xAF);
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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static void sh1107_send_cmd(uint8_t cmd)
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{
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disp_wait_for_pending_transactions();
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gpio_set_level(SH1107_DC, 0); /*Command mode*/
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disp_spi_send_data(&cmd, 1);
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}
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static void sh1107_send_data(void * data, uint16_t length)
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{
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disp_wait_for_pending_transactions();
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gpio_set_level(SH1107_DC, 1); /*Data mode*/
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disp_spi_send_data(data, length);
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}
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static void sh1107_send_color(void * data, uint16_t length)
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{
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disp_wait_for_pending_transactions();
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gpio_set_level(SH1107_DC, 1); /*Data mode*/
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disp_spi_send_colors(data, length);
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}
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