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lcd: support i80 LCD on esp32/s2/s3

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This commit is contained in:
morris
2021-08-04 20:11:31 +08:00
parent 3bcd9278fa
commit 6fdc5877cd
28 changed files with 1717 additions and 228 deletions
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34
components/esp_lcd/src/esp_lcd_common.h
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@@ -5,22 +5,21 @@
*/
#pragma once
#include <stddef.h>
#include "soc/soc_caps.h"
#include "hal/dma_types.h"
#if SOC_LCDCAM_SUPPORTED
#include "hal/lcd_hal.h"
#include "hal/dma_types.h"
#else
#error "lcd peripheral is not supported on this chip"
#endif
#ifdef __cplusplus
extern "C" {
#endif
#if SOC_LCDCAM_SUPPORTED
#define LCD_PERIPH_CLOCK_PRE_SCALE (2) // This is the minimum divider that can be applied to LCD peripheral
#if SOC_LCDCAM_SUPPORTED
typedef enum {
LCD_COM_DEVICE_TYPE_I80,
LCD_COM_DEVICE_TYPE_RGB
@@ -54,6 +53,8 @@ void lcd_com_remove_device(lcd_com_device_type_t device_type, int member_id);
*/
unsigned long lcd_com_select_periph_clock(lcd_hal_context_t *hal);
#endif // SOC_LCDCAM_SUPPORTED
/**
* @brief Mount data to DMA descriptors
*
@@ -63,7 +64,28 @@ unsigned long lcd_com_select_periph_clock(lcd_hal_context_t *hal);
*/
void lcd_com_mount_dma_data(dma_descriptor_t *desc_head, const void *buffer, size_t len);
#endif // SOC_LCDCAM_SUPPORTED
/**
* @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
}