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driver for ST7735/89 & LED PWM

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This commit is contained in:
Philippe G
2020-07-28 18:35:10 -07:00
parent c41d30f883
commit 3c76f6fcb5
14 changed files with 483 additions and 75 deletions
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45
components/display/core/gds.c
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@@ -9,22 +9,37 @@
#include <string.h>
#include <ctype.h>
#include <stdint.h>
#include <math.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "driver/ledc.h"
#include "esp_log.h"
#include "gds.h"
#include "gds_private.h"
static struct GDS_Device Display;
static struct GDS_BacklightPWM PWMConfig;
static char TAG[] = "gds";
struct GDS_Device* GDS_AutoDetect( char *Driver, GDS_DetectFunc* DetectFunc[] ) {
struct GDS_Device* GDS_AutoDetect( char *Driver, GDS_DetectFunc* DetectFunc[], struct GDS_BacklightPWM* PWM ) {
if (!Driver) return NULL;
if (PWM) PWMConfig = *PWM;
for (int i = 0; DetectFunc[i]; i++) {
if (DetectFunc[i](Driver, &Display)) {
ESP_LOGD(TAG, "Detected driver %p", &Display);
if (PWM && PWM->Init) {
ledc_timer_config_t PWMTimer = {
.duty_resolution = LEDC_TIMER_13_BIT,
.freq_hz = 5000,
.speed_mode = LEDC_HIGH_SPEED_MODE,
.timer_num = PWMConfig.Timer,
};
ledc_timer_config(&PWMTimer);
}
ESP_LOGD(TAG, "Detected driver %p with PWM %d", &Display, PWM ? PWM->Init : 0);
return &Display;
}
}
@@ -165,6 +180,22 @@ bool GDS_Init( struct GDS_Device* Device ) {
NullCheck( Device->Framebuffer, return false );
}
if (Device->Backlight.Pin >= 0) {
Device->Backlight.Channel = PWMConfig.Channel++;
Device->Backlight.PWM = PWMConfig.Max - 1;
ledc_channel_config_t PWMChannel = {
.channel = Device->Backlight.Channel,
.duty = Device->Backlight.PWM,
.gpio_num = Device->Backlight.Pin,
.speed_mode = LEDC_HIGH_SPEED_MODE,
.hpoint = 0,
.timer_sel = PWMConfig.Timer,
};
ledc_channel_config(&PWMChannel);
}
bool Res = Device->Init( Device );
if (!Res && Device->Framebuffer) free(Device->Framebuffer);
return Res;
@@ -196,7 +227,15 @@ int GDS_GrayMap( struct GDS_Device* Device, uint8_t Level) {
return -1;
}
void GDS_SetContrast( struct GDS_Device* Device, uint8_t Contrast ) { if (Device->SetContrast) Device->SetContrast( Device, Contrast); }
void GDS_SetContrast( struct GDS_Device* Device, uint8_t Contrast ) {
if (Device->SetContrast) Device->SetContrast( Device, Contrast );
else if (Device->Backlight.Pin >= 0) {
Device->Backlight.PWM = PWMConfig.Max * powf(Contrast / 255.0, 3);
ledc_set_duty( LEDC_HIGH_SPEED_MODE, Device->Backlight.Channel, Device->Backlight.PWM );
ledc_update_duty( LEDC_HIGH_SPEED_MODE, Device->Backlight.Channel );
}
}
void GDS_SetHFlip( struct GDS_Device* Device, bool On ) { if (Device->SetHFlip) Device->SetHFlip( Device, On ); }
void GDS_SetVFlip( struct GDS_Device* Device, bool On ) { if (Device->SetVFlip) Device->SetVFlip( Device, On ); }
void GDS_SetDirty( struct GDS_Device* Device ) { Device->Dirty = true; }