esp-idf/components/esp_lcd/priv_include/esp_lcd_common.h

93 lines
2.3 KiB
C

/*
* SPDX-FileCopyrightText: 2021-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include <stddef.h>
#include "sdkconfig.h"
#include "soc/soc_caps.h"
#include "hal/dma_types.h"
#include "esp_intr_alloc.h"
#include "esp_heap_caps.h"
#if SOC_LCDCAM_SUPPORTED
#include "hal/lcd_hal.h"
#endif
#ifdef __cplusplus
extern "C" {
#endif
#define LCD_I80_INTR_ALLOC_FLAGS ESP_INTR_FLAG_INTRDISABLED
#define LCD_I80_MEM_ALLOC_CAPS MALLOC_CAP_DEFAULT
#define LCD_PERIPH_CLOCK_PRE_SCALE (2) // This is the minimum divider that can be applied to LCD peripheral
#if SOC_PERIPH_CLK_CTRL_SHARED
#define LCD_CLOCK_SRC_ATOMIC() PERIPH_RCC_ATOMIC()
#else
#define LCD_CLOCK_SRC_ATOMIC()
#endif
#if SOC_LCDCAM_SUPPORTED
typedef enum {
LCD_COM_DEVICE_TYPE_I80,
LCD_COM_DEVICE_TYPE_RGB
} lcd_com_device_type_t;
/**
* @brief Register a LCD device to platform
*
* @param device_type Device type, refer to lcd_com_device_type_t
* @param device_obj Device object
* @return >=0: member_id, <0: no free lcd bus/panel slots
*/
int lcd_com_register_device(lcd_com_device_type_t device_type, void *device_obj);
/**
* @brief Remove a device from platform
*
* @param device_type Device type, refer to lcd_com_device_type_t
* @param member_id member ID
*/
void lcd_com_remove_device(lcd_com_device_type_t device_type, int member_id);
#endif // SOC_LCDCAM_SUPPORTED
/**
* @brief Mount data to DMA descriptors
*
* @param desc_head Point to the head of DMA descriptor chain
* @param buffer Data buffer
* @param len Size of the data buffer, in bytes
*/
void lcd_com_mount_dma_data(dma_descriptor_t *desc_head, const void *buffer, size_t len);
/**
* @brief Reverse the bytes in the buffer
*
* @note LCD is big-endian, e.g. to send command 0x1234, byte 0x12 should appear on the bus first
* However, the low level peripheral (like i80, i2s) will send 0x34 first.
* This helper function is used to reverse the bytes order
*
* @param buf buffer address
* @param start start index of the buffer
* @param end end index of the buffer
*/
static inline void lcd_com_reverse_buffer_bytes(uint8_t *buf, int start, int end)
{
uint8_t temp = 0;
while (start < end) {
temp = buf[start];
buf[start] = buf[end];
buf[end] = temp;
start++;
end--;
}
}
#ifdef __cplusplus
}
#endif