zenermerps/lvgl_esp32_drivers
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

pcd8544: Update driver

Browse source
This commit is contained in:
C47D 2022-01-11 18:14:57 -06:00
parent 6af2ab1f1c
commit 11f9c2b93f
2 changed files with 55 additions and 53 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

100
lvgl_tft/pcd8544.c
View file

@ -6,15 +6,11 @@
* https://github.com/olikraus/u8g2
*/
#include "disp_spi.h"
#include "driver/gpio.h"
#include <esp_log.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "pcd8544.h"
#include "disp_spi.h"
#include "display_port.h"
#define TAG "lv_pcd8544"
/**********************
@ -27,24 +23,33 @@
/**********************
* STATIC FUNCTIONS
**********************/
static inline void set_cmd_mode(lv_disp_drv_t * drv)
{
display_port_gpio_dc(drv, 0);
}
static void pcd8544_send_cmd(uint8_t cmd)
static inline void set_data_mode(lv_disp_drv_t * drv)
{
display_port_gpio_dc(drv, 1);
}
static void pcd8544_send_cmd(lv_disp_drv_t *drv, uint8_t cmd)
{
disp_wait_for_pending_transactions();
gpio_set_level(PCD8544_DC, 0); /*Command mode*/
set_cmd_mode(drv);
disp_spi_send_data(&cmd, 1);
}
static void pcd8544_send_data(void * data, uint16_t length)
static void pcd8544_send_data(lv_disp_drv_t *drv, void * data, uint16_t length)
{
disp_wait_for_pending_transactions();
gpio_set_level(PCD8544_DC, 1); /*Data mode*/
set_data_mode(drv);
disp_spi_send_data(data, length);
}
static void pcd8544_send_colors(void * data, uint16_t length)
static void pcd8544_send_colors(lv_disp_drv_t *drv, void * data, uint16_t length)
{
gpio_set_level(PCD8544_DC, 1); /*Data mode*/
set_data_mode(drv);
disp_spi_send_colors(data, length);
}
@ -52,37 +57,38 @@ static void pcd8544_send_colors(void * data, uint16_t length)
* GLOBAL FUNCTIONS
**********************/
void pcd8544_init(void){
// TODO: orientation
// Initialize non-SPI GPIOs
gpio_pad_select_gpio(PCD8544_DC);
gpio_set_direction(PCD8544_DC, GPIO_MODE_OUTPUT);
gpio_pad_select_gpio(PCD8544_RST);
gpio_set_direction(PCD8544_RST, GPIO_MODE_OUTPUT);
// Reset the display
gpio_set_level(PCD8544_RST, 0);
vTaskDelay(100 / portTICK_RATE_MS);
gpio_set_level(PCD8544_RST, 1);
vTaskDelay(100 / portTICK_RATE_MS);
pcd8544_send_cmd(0x21); /* activate chip (PD=0), horizontal increment (V=0), enter extended command set (H=1) */
pcd8544_send_cmd(0x06); /* temp. control: b10 = 2 */
pcd8544_send_cmd(0x13); /* bias system 1:48 */
pcd8544_send_cmd(0xc0); /* medium Vop = Contrast 0x40 = 64 */
pcd8544_send_cmd(0x20); /* activate chip (PD=0), horizontal increment (V=0), enter extended command set (H=0) */
pcd8544_send_cmd(0x0c); /* display mode normal */
void pcd8544_reset(lv_disp_drv_t *drv)
{
display_port_gpio_rst(drv, 0);
display_port_delay(drv, 100);
display_port_gpio_rst(drv, 1);
display_port_delay(drv, 100);
}
void pcd8544_set_contrast (uint8_t contrast){
void pcd8544_init(lv_disp_drv_t *drv)
{
// TODO: orientation
// Reset the display
pcd8544_reset(drv);
pcd8544_send_cmd(drv, 0x21); /* activate chip (PD=0), horizontal increment (V=0), enter extended command set (H=1) */
pcd8544_send_cmd(drv, 0x06); /* temp. control: b10 = 2 */
pcd8544_send_cmd(drv, 0x13); /* bias system 1:48 */
pcd8544_send_cmd(drv, 0xc0); /* medium Vop = Contrast 0x40 = 64 */
pcd8544_send_cmd(drv, 0x20); /* activate chip (PD=0), horizontal increment (V=0), enter extended command set (H=0) */
pcd8544_send_cmd(drv, 0x0c); /* display mode normal */
}
void pcd8544_set_contrast(lv_disp_drv_t *drv, uint8_t contrast)
{
if (contrast > 0x7f){
contrast = 0x7f;
}
pcd8544_send_cmd(0x21); /* activate chip (PD=0), horizontal increment (V=0), enter extended command set (H=1) */
pcd8544_send_cmd(0x80 | contrast); /* medium Vop = Contrast */
pcd8544_send_cmd(drv, 0x21); /* activate chip (PD=0), horizontal increment (V=0), enter extended command set (H=1) */
pcd8544_send_cmd(drv, 0x80 | contrast); /* medium Vop = Contrast */
}
void pcd8544_rounder(lv_disp_drv_t * disp_drv, lv_area_t *area){
@ -112,7 +118,7 @@ void pcd8544_set_px_cb(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w
void pcd8544_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_map){
pcd8544_send_cmd(0x20); /* activate chip (PD=0), horizontal increment (V=0), enter extended command set (H=0) */
pcd8544_send_cmd(disp_drv, 0x20); /* activate chip (PD=0), horizontal increment (V=0), enter extended command set (H=0) */
uint8_t * buf = (uint8_t *) color_map;
@ -123,9 +129,9 @@ void pcd8544_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t
// send complete frame buffer at once.
// NOTE: disp_spi_send_colors triggers lv_disp_flush_ready
pcd8544_send_cmd(0x40); /* set Y address */
pcd8544_send_cmd(0x80); /* set X address */
pcd8544_send_colors(buf, disp_drv->hor_res * disp_drv->ver_res / 8);
pcd8544_send_cmd(disp_drv, 0x40); /* set Y address */
pcd8544_send_cmd(disp_drv, 0x80); /* set X address */
pcd8544_send_colors(disp_drv, buf, disp_drv->hor_res * disp_drv->ver_res / 8);
} else {
@ -136,11 +142,11 @@ void pcd8544_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t
uint16_t bank;
uint16_t cols_to_update = area->x2 - area->x1 + 1;
for (bank = bank_start ; bank <= bank_end ; bank++ ){
pcd8544_send_cmd(0x40 | bank ); /* set Y address */
pcd8544_send_cmd(0x80 | area->x1 ); /* set X address */
for (bank = bank_start ; bank <= bank_end ; bank++){
pcd8544_send_cmd(disp_drv, 0x40 | bank); /* set Y address */
pcd8544_send_cmd(disp_drv, 0x80 | area->x1); /* set X address */
uint16_t offset = bank * disp_drv->hor_res + area->x1;
pcd8544_send_data(&buf[offset], cols_to_update);
pcd8544_send_data(disp_drv, &buf[offset], cols_to_update);
}
lv_disp_flush_ready(disp_drv);

8
lvgl_tft/pcd8544.h
View file

@ -26,10 +26,6 @@ extern "C" {
* DEFINES
*********************/
#define PCD8544_DC CONFIG_LV_DISP_PIN_DC
#define PCD8544_RST CONFIG_LV_DISP_PIN_RST
#define PCD8544_BCKL CONFIG_LV_DISP_PIN_BCKL
/**********************
* TYPEDEFS
**********************/
@ -38,12 +34,12 @@ extern "C" {
* GLOBAL PROTOTYPES
**********************/
void pcd8544_init(void);
void pcd8544_init(lv_disp_drv_t *drv);
void pcd8544_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map);
void pcd8544_rounder(lv_disp_drv_t * disp_drv, lv_area_t *area);
void pcd8544_set_px_cb(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
lv_color_t color, lv_opa_t opa);
void pcd8544_set_contrast(uint8_t contrast);
void pcd8544_set_contrast(lv_disp_drv_t *drv, uint8_t contrast);
/**********************
* MACROS