Skip to content

D
Docs

OpenHarmony / Docs
1 年多 前同步成功

通知 159
Star 292
Fork 28
D
Docs
提交 5988717f 编写于 作者: X xdx1921
浏览文件
操作

Rectification suggestions for LCD docs 

Signed-off-by: Nxdx1921 <fengxu12@huawei.com>
上级 9431e86f
隐藏空白更改
内联 并排
Showing with 254 addition and 309 deletion
zh-cn/device-dev/driver/driver-peripherals-lcd-des.md
浏览文件 @ 5988717f
# LCD
## 概述
LCD（Liquid Crystal Display）显示器的驱动，通过对显示器上电、初始化显示器驱动IC（Integrated Circuit）内部寄存器等操作，使其可以正常工作。
### 功能简介
LCD（Liquid Crystal Display）驱动编程，通过对显示器上电、初始化显示器驱动IC（Integrated Circuit）内部寄存器等操作，使其可以正常工作。
基于HDF（Hardware Driver Foundation）[驱动框架](../driver/driver-hdf-overview.md)构建的Display驱动模型作用如下：
- 为LCD器件驱动开发提供了基础驱动框架，提升驱动开发效率。
基于HDF（Hardware Driver Foundation）[驱动框架](../driver/driver-hdf-overview.md)构建的Display驱动模型，为LCD器件驱动开发提供了基础驱动框架，提升驱动开发效率。同时，便于开发的器件驱动实现跨OS、跨芯片平台迁移。基于HDF驱动框架的Display驱动模型如下所示。
- 便于开发的器件驱动实现跨OS、跨芯片平台迁移。
基于HDF驱动框架的Display驱动模型如下所示：
**图1** 基于HDF驱动框架的Display驱动模型
![image](figures/基于HDF驱动框架的Display驱动模型.png "基于HDF驱动框架的Display驱动模型")
Display驱动模型主要由平台驱动层、芯片平台适配层、LCD器件驱动层三部分组成。驱动模型基于HDF驱动框架开发，通过Platform层和OSAL层提供的接口，屏蔽内核形态的差异，使得器件驱动可以便利的迁移到不同OS及芯片平台。模型向上对接Display公共HAL层，支撑HDI（Hardware Device Interface）接口的实现，通过Display-HDI对图形服务提供各类驱动能力接口。
- Display平台驱动层：通过HDF提供的IOService数据通道，与公共HAL层对接，集中接收并处理各类上层调用指令。
......@@ -23,8 +29,7 @@ Display驱动模型主要由平台驱动层、芯片平台适配层、LCD器件
基于Display驱动模型开发LCD驱动，可以借助平台提供的各种能力及接口，较大程度的降低器件驱动的开发周期和难度，提升开发效率。
## 接口说明
### 基本概念
LCD接口通常可分为MIPI DSI接口、TTL接口和LVDS接口，常用的是MIPI DSI接口和TTL接口，下面对常用的MIPI DSI接口和TTL接口作简要介绍。
......@@ -34,7 +39,7 @@ LCD接口通常可分为MIPI DSI接口、TTL接口和LVDS接口，常用的是MI
![image](figures/MIPI-DSI接口.png "MIPI-DSI接口")
MIPI DSI接口是MIPI（Mobile Industry Processor Interface）联盟定义的显示接口，主要用于移动终端显示屏接口，接口数据传输遵循MIPI协议，MIPI DSI接口为数据接口，传输图像数据，通常情况下MIPI DSI接口的控制信息以MIPI包形式通过MIPI DSI接口发送到对端IC，不需要额外的外设接口。
MIPI DSI接口是MIPI（Mobile Industry Processor Interface）联盟定义的显示接口，主要用于移动终端显示屏接口，接口数据传输遵循MIPI协议，MIPI DSI接口为数据接口，传输图像数据，通常情况下MIPI DSI接口的控制信息以MIPI包形式通过MIPI DSI接口发送到对端IC，不需要额外的外设接口。
- TTL接口
......@@ -42,14 +47,31 @@ LCD接口通常可分为MIPI DSI接口、TTL接口和LVDS接口，常用的是MI
![image](figures/TTL接口.png "TTL接口")
TTL（Transistor Transistor Logic）即晶体管-晶体管逻辑，TTL电平信号由TTL器件产生，TTL器件是数字集成电路的一大门类，它采用双极型工艺制造，具有高速度、低功耗和品种多等特点。
​ TTL（Transistor Transistor Logic）即晶体管-晶体管逻辑，TTL电平信号由TTL器件产生，TTL器件是数字集成电路的一大门类，它采用双极型工艺制造，具有高速度、低功耗和品种多等特点。
TTL接口是并行方式传输数据的接口，有数据信号、时钟信号和控制信号（行同步、帧同步、数据有效信号等），在控制信号控制下完成数据传输。通常TTL接口的LCD，内部寄存器读写需要额外的外设接口，比如SPI接口、I2C接口等。
TTL接口是并行方式传输数据的接口，有数据信号、时钟信号和控制信号（行同步、帧同步、数据有效信号等），在控制信号控制下完成数据传输。通常TTL接口的LCD，内部寄存器读写需要额外的外设接口，比如SPI接口、I2C接口等。
### 约束与限制
开发者在进行LCD驱动编程过程中，除了要关注IC的型号，还要关注LCD外围电路设计、基带芯片的LCD接口单元、背光IC的控制等多个方面，同时包括软件的上层程序。这些都是影响开发者在调试LCD驱动的影响因素。
## 开发步骤
## 开发指导
Display驱动模型基于HDF驱动框架、Platform接口及OSAL接口开发，可以做到不区分OS（LiteOS、Linux）和芯片平台（Hi35xx、Hi38xx、V3S等），为LCD器件提供统一的驱动模型。开发步骤如下：
### 场景介绍
LCD驱动模型属于驱动基础适配模块，第三方需要适配OpenHarmony系统时，需要进行LCD驱动适配。LCD驱动适配基于HDF驱动框架、Platform接口及OSAL接口开发，可以做到不区分OS（LiteOS、Linux）和芯片平台（Hi35xx、Hi38xx、V3S等），为LCD器件提供统一的驱动模型。
### 接口说明
表1 LCD驱动适配所需接口
| 接口名 | 描述 |
| :------------------------------------------------------ | ------------------- |
| display :: host | 设备描述配置 |
| static int32_t LcdResetOn(void) | 设置Reset Pin脚状态 |
| int32_t SampleEntryInit(struct HdfDeviceObject *object) | 器件驱动入口函数 |
### 开发步骤
1. 添加LCD驱动相关的设备描述配置。
......@@ -58,305 +80,228 @@ Display驱动模型基于HDF驱动框架、Platform接口及OSAL接口开发，
3. 添加器件驱动，并在驱动入口函数Init中注册Panel驱动数据，驱动数据接口主要包括如下接口：
- LCD上下电
根据LCD硬件连接，使用Platform接口层提供的GPIO操作接口操作对应LCD管脚，例如复位管脚、IOVCC管脚，上电时序参考LCD供应商提供的SPEC。
- 发送初始化序列
根据LCD硬件接口，使用Platform接口层提供的I2C、SPI、MIPI等接口，下载LCD初始化序列，初始化参数序列可以参考LCD供应商提供的SPEC。
4. 根据需求实现HDF框架其他接口，比如Release接口。
5. 根据需求使用HDF框架可创建其他设备节点，用于业务逻辑或者调试功能。
## 开发实例
添加设备描述配置：
```
/* Display驱动相关的设备描述配置 */
display :: host {
hostName = "display_host";
/* Display平台驱动设备描述 */
device_hdf_disp :: device {
device0 :: deviceNode {
policy = 2;
priority = 200;
permission = 0660;
moduleName = "HDF_DISP";
serviceName = "hdf_disp";
}
}
/* SoC适配层驱动设备描述 */
device_hi35xx_disp :: device {
device0 :: deviceNode {
policy = 0;
priority = 199;
moduleName = "HI351XX_DISP";
}
}
/* LCD器件驱动设备描述 */
device_lcd :: device {
device0 :: deviceNode {
policy = 0;
priority = 100;
preload = 0;
moduleName = "LCD_Sample";
}
device1 :: deviceNode {
policy = 0;
priority = 100;
preload = 2;
moduleName = "LCD_SampleXX";
}
}
}
```
SOC适配层驱动，以Hi35xx系列芯片为例，需要在本层驱动中适配MIPI等和芯片平台相关的配置，示例如下：
```
static int32_t MipiDsiInit(struct PanelInfo *info)
{
int32_t ret;
struct DevHandle *mipiHandle = NULL;
struct MipiCfg cfg;
mipiHandle = MipiDsiOpen(0);
if (mipiHandle == NULL) {
HDF_LOGE("%s: MipiDsiOpen failure", __func__);
return HDF_FAILURE;
}
cfg.lane = info->mipi.lane;
cfg.mode = info->mipi.mode;
cfg.format = info->mipi.format;
cfg.burstMode = info->mipi.burstMode;
cfg.timing.xPixels = info->width;
cfg.timing.hsaPixels = info->hsw;
cfg.timing.hbpPixels = info->hbp;
cfg.timing.hlinePixels = info->width + info->hbp + info->hfp + info->hsw;
cfg.timing.vsaLines = info->vsw;
cfg.timing.vbpLines = info->vbp;
cfg.timing.vfpLines = info->vfp;
cfg.timing.ylines = info->height;
/* 0 : no care */
cfg.timing.edpiCmdSize = 0;
cfg.pixelClk = CalcPixelClk(info);
cfg.phyDataRate = CalcDataRate(info);
/* config mipi device */
ret = MipiDsiSetCfg(mipiHandle, &cfg);
if (ret != HDF_SUCCESS) {
HDF_LOGE("%s:MipiDsiSetCfg failure", __func__);
}
MipiDsiClose(mipiHandle);
HDF_LOGI("%s:pixelClk = %d, phyDataRate = %d\n", __func__,
cfg.pixelClk, cfg.phyDataRate);
return ret;
}
```
LCD器件驱动示例如下：
```
#define RESET_GPIO 5
#define MIPI_DSI0 0
#define BLK_PWM1 1
#define PWM_MAX_PERIOD 100000
/* backlight setting */
#define MIN_LEVEL 0
#define MAX_LEVEL 255
#define DEFAULT_LEVEL 100
#define WIDTH 480
#define HEIGHT 960
#define HORIZONTAL_BACK_PORCH 20
#define HORIZONTAL_FRONT_PORCH 20
#define HORIZONTAL_SYNC_WIDTH 10
#define VERTICAL_BACK_PORCH 14
#define VERTICAL_FRONT_PORCH 16
#define VERTICAL_SYNC_WIDTH 2
#define FRAME_RATE 60
/* PanelInfo结构体结构体 */
struct PanelInfo {
uint32_t width;
uint32_t height;
uint32_t hbp;
uint32_t hfp;
uint32_t hsw;
uint32_t vbp;
uint32_t vfp;
uint32_t vsw;
uint32_t frameRate;
enum LcdIntfType intfType;
enum IntfSync intfSync;
struct MipiDsiDesc mipi;
struct BlkDesc blk;
struct PwmCfg pwm;
};
/* LCD屏的初始化序列 */
static uint8_t g_payLoad0[] = { 0xF0, 0x5A, 0x5A };
static uint8_t g_payLoad1[] = { 0xF1, 0xA5, 0xA5 };
static uint8_t g_payLoad2[] = { 0xB3, 0x03, 0x03, 0x03, 0x07, 0x05, 0x0D, 0x0F, 0x11, 0x13, 0x09, 0x0B };
static uint8_t g_payLoad3[] = { 0xB4, 0x03, 0x03, 0x03, 0x06, 0x04, 0x0C, 0x0E, 0x10, 0x12, 0x08, 0x0A };
static uint8_t g_payLoad4[] = { 0xB0, 0x54, 0x32, 0x23, 0x45, 0x44, 0x44, 0x44, 0x44, 0x60, 0x00, 0x60, 0x1C };
static uint8_t g_payLoad5[] = { 0xB1, 0x32, 0x84, 0x02, 0x87, 0x12, 0x00, 0x50, 0x1C };
static uint8_t g_payLoad6[] = { 0xB2, 0x73, 0x09, 0x08 };
static uint8_t g_payLoad7[] = { 0xB6, 0x5C, 0x5C, 0x05 };
static uint8_t g_payLoad8[] = { 0xB8, 0x23, 0x41, 0x32, 0x30, 0x03 };
static uint8_t g_payLoad9[] = { 0xBC, 0xD2, 0x0E, 0x63, 0x63, 0x5A, 0x32, 0x22, 0x14, 0x22, 0x03 };
static uint8_t g_payLoad10[] = { 0xb7, 0x41 };
static uint8_t g_payLoad11[] = { 0xC1, 0x0c, 0x10, 0x04, 0x0c, 0x10, 0x04 };
static uint8_t g_payLoad12[] = { 0xC2, 0x10, 0xE0 };
static uint8_t g_payLoad13[] = { 0xC3, 0x22, 0x11 };
static uint8_t g_payLoad14[] = { 0xD0, 0x07, 0xFF };
static uint8_t g_payLoad15[] = { 0xD2, 0x63, 0x0B, 0x08, 0x88 };
static uint8_t g_payLoad16[] = { 0xC6, 0x08, 0x15, 0xFF, 0x10, 0x16, 0x80, 0x60 };
static uint8_t g_payLoad17[] = { 0xc7, 0x04 };
static uint8_t g_payLoad18[] = {
0xC8, 0x7C, 0x50, 0x3B, 0x2C, 0x25, 0x16, 0x1C, 0x08, 0x27, 0x2B, 0x2F, 0x52, 0x43, 0x4C, 0x40,
0x3D, 0x30, 0x1E, 0x06, 0x7C, 0x50, 0x3B, 0x2C, 0x25, 0x16, 0x1C, 0x08, 0x27, 0x2B, 0x2F, 0x52,
0x43, 0x4C, 0x40, 0x3D, 0x30, 0x1E, 0x06
};
static uint8_t g_payLoad19[] = { 0x11 };
static uint8_t g_payLoad20[] = { 0x29 };
struct DsiCmdDesc g_OnCmd[] = {
{ 0x29, 0, sizeof(g_payLoad0), g_payLoad0 },
{ 0x29, 0, sizeof(g_payLoad1), g_payLoad1 },
{ 0x29, 0, sizeof(g_payLoad2), g_payLoad2 },
{ 0x29, 0, sizeof(g_payLoad3), g_payLoad3 },
{ 0x29, 0, sizeof(g_payLoad4), g_payLoad4 },
{ 0x29, 0, sizeof(g_payLoad5), g_payLoad5 },
{ 0x29, 0, sizeof(g_payLoad6), g_payLoad6 },
{ 0x29, 0, sizeof(g_payLoad7), g_payLoad7 },
{ 0x29, 0, sizeof(g_payLoad8), g_payLoad8 },
{ 0x29, 0, sizeof(g_payLoad9), g_payLoad9 },
{ 0x23, 0, sizeof(g_payLoad10), g_payLoad10 },
{ 0x29, 0, sizeof(g_payLoad11), g_payLoad11 },
{ 0x29, 0, sizeof(g_payLoad12), g_payLoad12 },
{ 0x29, 0, sizeof(g_payLoad13), g_payLoad13 },
{ 0x29, 0, sizeof(g_payLoad14), g_payLoad14 },
{ 0x29, 0, sizeof(g_payLoad15), g_payLoad15 },
{ 0x29, 0, sizeof(g_payLoad16), g_payLoad16 },
{ 0x23, 0, sizeof(g_payLoad17), g_payLoad17 },
{ 0x29, 1, sizeof(g_payLoad18), g_payLoad18 },
{ 0x05, 120, sizeof(g_payLoad19), g_payLoad19 },
{ 0x05, 120, sizeof(g_payLoad20), g_payLoad20 },
};
static DevHandle g_mipiHandle = NULL;
static DevHandle g_pwmHandle = NULL;
/* 设置Reset Pin脚状态 */
static int32_t LcdResetOn(void)
{
int32_t ret;
ret = GpioSetDir(RESET_GPIO, GPIO_DIR_OUT);
if (ret != HDF_SUCCESS) {
HDF_LOGE("GpioSetDir failure, ret:%d", ret);
return HDF_FAILURE;
}
ret = GpioWrite(RESET_GPIO, GPIO_VAL_HIGH);
if (ret != HDF_SUCCESS) {
HDF_LOGE("GpioWrite failure, ret:%d", ret);
return HDF_FAILURE;
}
/* delay 20ms */
OsalMSleep(20);
return HDF_SUCCESS;
}
static int32_t SampleInit(void)
{
/* 获取MIPI DSI设备操作句柄 */
g_mipiHandle = MipiDsiOpen(MIPI_DSI0);
if (g_mipiHandle == NULL) {
HDF_LOGE("%s: MipiDsiOpen failure", __func__);
return HDF_FAILURE;
}
return HDF_SUCCESS;
}
static int32_t SampleOn(void)
{
int32_t ret;
/* LCD上电序列 */
ret = LcdResetOn();
if (ret != HDF_SUCCESS) {
HDF_LOGE("%s: LcdResetOn failure", __func__);
return HDF_FAILURE;
}
if (g_mipiHandle == NULL) {
HDF_LOGE("%s: g_mipiHandle is null", __func__);
return HDF_FAILURE;
}
/* 使用mipi下发初始化序列 */
int32_t count = sizeof(g_OnCmd) / sizeof(g_OnCmd[0]);
int32_t i;
for (i = 0; i < count; i++) {
ret = MipiDsiTx(g_mipiHandle, &(g_OnCmd[i]));
if (ret != HDF_SUCCESS) {
HDF_LOGE("MipiDsiTx failure");
return HDF_FAILURE;
}
}
/* 将mipi切换到HS模式 */
MipiDsiSetHsMode(g_mipiHandle);
return HDF_SUCCESS;
}
/* PanelInfo结构体变量 */
static struct PanelInfo g_panelInfo = {
.width = WIDTH, /* width */
.height = HEIGHT, /* height */
.hbp = HORIZONTAL_BACK_PORCH, /* horizontal back porch */
.hfp = HORIZONTAL_FRONT_PORCH, /* horizontal front porch */
.hsw = HORIZONTAL_SYNC_WIDTH, /* horizontal sync width */
.vbp = VERTICAL_BACK_PORCH, /* vertical back porch */
.vfp = VERTICAL_FRONT_PORCH, /* vertical front porch */
.vsw = VERTICAL_SYNC_WIDTH, /* vertical sync width */
.frameRate = FRAME_RATE, /* frame rate */
.intfType = MIPI_DSI, /* panel interface type */
.intfSync = OUTPUT_USER, /* output timing type */
/* mipi config info */
.mipi = { DSI_2_LANES, DSI_VIDEO_MODE, VIDEO_BURST_MODE, FORMAT_RGB_24_BIT },
/* backlight config info */
.blk = { BLK_PWM, MIN_LEVEL, MAX_LEVEL, DEFAULT_LEVEL },
.pwm = { BLK_PWM1, PWM_MAX_PERIOD },
};
/* 器件驱动需要适配的基础接口 */
static struct PanelData g_panelData = {
.info = &g_panelInfo,
.init = SampleInit,
.on = SampleOn,
.off = SampleOff,
.setBacklight = SampleSetBacklight,
};
/* 器件驱动入口函数 */
int32_t SampleEntryInit(struct HdfDeviceObject *object)
{
HDF_LOGI("%s: enter", __func__);
if (object == NULL) {
HDF_LOGE("%s: param is null!", __func__);
return HDF_FAILURE;
}
/* 器件驱动接口注册，ops提供给平台驱动调用 */
if (PanelDataRegister(&g_panelData) != HDF_SUCCESS) {
HDF_LOGE("%s: PanelDataRegister error!", __func__);
return HDF_FAILURE;
}
return HDF_SUCCESS;
}
struct HdfDriverEntry g_sampleDevEntry = {
.moduleVersion = 1,
.moduleName = "LCD_SAMPLE",
.Init = SampleEntryInit,
};
HDF_INIT(g_sampleDevEntry);
```
4. （可选）根据需求实现HDF框架其他接口，比如Release接口。
5. （可选）根据需求使用HDF框架可创建其他设备节点，用于业务逻辑或者调试功能。
### 开发实例
以Hi35xx系列芯片为例，根据开发步骤所述，介绍LCD驱动的详细适配过程。
1. 添加设备描述配置（vendor/bearpi/bearpi_hm_micro/hdf_config/device_info/device_info.hcs）
```c++
/* Display驱动相关的设备描述配置 */
display :: host {
hostName = "display_host";
/* Display平台驱动设备描述 */
device_hdf_disp :: device {
device0 :: deviceNode {
policy = 2;
priority = 200;
permission = 0660;
moduleName = "HDF_DISP";
serviceName = "hdf_disp";
}
}
/* SoC适配层驱动设备描述 */
device_hi35xx_disp :: device {
device0 :: deviceNode {
policy = 0;
priority = 199;
moduleName = "HI351XX_DISP";
}
}
/* LCD器件驱动设备描述 */
device_lcd :: device {
device0 :: deviceNode {
policy = 0;
priority = 100;
preload = 0;
moduleName = "LCD_Sample";
}
device1 :: deviceNode {
policy = 0;
priority = 100;
preload = 2;
moduleName = "LCD_SampleXX";
}
}
}
```
2. SoC平台驱动适配层中适配对应的芯片平台驱动（drivers/hdf_core/framework/model/display/driver/adapter_soc/hi35xx_disp.c）
```c++
/* Display驱动适配MIPI等和芯片平台相关的配置 */
static int32_t MipiDsiInit(struct PanelInfo *info)
{
int32_t ret;
struct DevHandle *mipiHandle = NULL;
struct MipiCfg cfg;
mipiHandle = MipiDsiOpen(0);
if (mipiHandle == NULL) {
HDF_LOGE("%s: MipiDsiOpen failure", __func__);
return HDF_FAILURE;
}
cfg.lane = info->mipi.lane;
cfg.mode = info->mipi.mode;
cfg.format = info->mipi.format;
cfg.burstMode = info->mipi.burstMode;
cfg.timing.xPixels = info->width;
cfg.timing.hsaPixels = info->hsw;
cfg.timing.hbpPixels = info->hbp;
cfg.timing.hlinePixels = info->width + info->hbp + info->hfp + info->hsw;
cfg.timing.vsaLines = info->vsw;
cfg.timing.vbpLines = info->vbp;
cfg.timing.vfpLines = info->vfp;
cfg.timing.ylines = info->height;
/* 0 : no care */
cfg.timing.edpiCmdSize = 0;
cfg.pixelClk = CalcPixelClk(info);
cfg.phyDataRate = CalcDataRate(info);
/* config mipi device */
ret = MipiDsiSetCfg(mipiHandle, &cfg);
if (ret != HDF_SUCCESS) {
HDF_LOGE("%s:MipiDsiSetCfg failure", __func__);
}
MipiDsiClose(mipiHandle);
HDF_LOGI("%s:pixelClk = %d, phyDataRate = %d\n", __func__,
cfg.pixelClk, cfg.phyDataRate);
return ret;
}
```
3. 添加器件（drivers/hdf_core/framework/model/display/driver/panel/mipi_icn9700.c）
- 驱动定义相关接口信息
```c++
#define RESET_GPIO 5
#define MIPI_DSI0 0
#define BLK_PWM1 1
#define PWM_MAX_PERIOD 100000
/* backlight setting */
#define MIN_LEVEL 0
#define MAX_LEVEL 255
#define DEFAULT_LEVEL 100
#define WIDTH 480
#define HEIGHT 960
#define HORIZONTAL_BACK_PORCH 20
#define HORIZONTAL_FRONT_PORCH 20
#define HORIZONTAL_SYNC_WIDTH 10
#define VERTICAL_BACK_PORCH 14
#define VERTICAL_FRONT_PORCH 16
#define VERTICAL_SYNC_WIDTH 2
#define FRAME_RATE 60
```
- 定义PanelInfo结构体
```c++
struct PanelInfo {
uint32_t width;
uint32_t height;
uint32_t hbp;
uint32_t hfp;
uint32_t hsw;
uint32_t vbp;
uint32_t vfp;
uint32_t vsw;
uint32_t frameRate;
enum LcdIntfType intfType;
enum IntfSync intfSync;
struct MipiDsiDesc mipi;
struct BlkDesc blk;
struct PwmCfg pwm;
};
```
- 初始化LCD屏
```c++
static uint8_t g_payLoad0[] = { 0xF0, 0x5A, 0x5A };
static uint8_t g_payLoad1[] = { 0xF1, 0xA5, 0xA5 };
static uint8_t g_payLoad2[] = { 0xB3, 0x03, 0x03, 0x03, 0x07, 0x05, 0x0D, 0x0F, 0x11, 0x13, 0x09, 0x0B };
static uint8_t g_payLoad3[] = { 0xB4, 0x03, 0x03, 0x03, 0x06, 0x04, 0x0C, 0x0E, 0x10, 0x12, 0x08, 0x0A };
static uint8_t g_payLoad4[] = { 0xB0, 0x54, 0x32, 0x23, 0x45, 0x44, 0x44, 0x44, 0x44, 0x60, 0x00, 0x60, 0x1C };
static uint8_t g_payLoad5[] = { 0xB1, 0x32, 0x84, 0x02, 0x87, 0x12, 0x00, 0x50, 0x1C };
static uint8_t g_payLoad6[] = { 0xB2, 0x73, 0x09, 0x08 };
static uint8_t g_payLoad7[] = { 0xB6, 0x5C, 0x5C, 0x05 };
static uint8_t g_payLoad8[] = { 0xB8, 0x23, 0x41, 0x32, 0x30, 0x03 };
static uint8_t g_payLoad9[] = { 0xBC, 0xD2, 0x0E, 0x63, 0x63, 0x5A, 0x32, 0x22, 0x14, 0x22, 0x03 };
static uint8_t g_payLoad10[] = { 0xb7, 0x41 };
static uint8_t g_payLoad11[] = { 0xC1, 0x0c, 0x10, 0x04, 0x0c, 0x10, 0x04 };
static uint8_t g_payLoad12[] = { 0xC2, 0x10, 0xE0 };
static uint8_t g_payLoad13[] = { 0xC3, 0x22, 0x11 };
static uint8_t g_payLoad14[] = { 0xD0, 0x07, 0xFF };
static uint8_t g_payLoad15[] = { 0xD2, 0x63, 0x0B, 0x08, 0x88 };
static uint8_t g_payLoad16[] = { 0xC6, 0x08, 0x15, 0xFF, 0x10, 0x16, 0x80, 0x60 };
static uint8_t g_payLoad17[] = { 0xc7, 0x04 };
static uint8_t g_payLoad18[] = {
0xC8, 0x7C, 0x50, 0x3B, 0x2C, 0x25, 0x16, 0x1C, 0x08, 0x27, 0x2B, 0x2F, 0x52, 0x43, 0x4C, 0x40,
0x3D, 0x30, 0x1E, 0x06, 0x7C, 0x50, 0x3B, 0x2C, 0x25, 0x16, 0x1C, 0x08, 0x27, 0x2B, 0x2F, 0x52,
0x43, 0x4C, 0x40, 0x3D, 0x30, 0x1E, 0x06
};
static uint8_t g_payLoad19[] = { 0x11 };
static uint8_t g_payLoad20[] = { 0x29 };
static DevHandle g_mipiHandle = NULL;
static DevHandle g_pwmHandle = NULL;
```
- 设置Reset Pin脚状态
```c++
static int32_t LcdResetOn(void)
{
int32_t ret;
ret = GpioSetDir(RESET_GPIO, GPIO_DIR_OUT);
if (ret != HDF_SUCCESS) {
HDF_LOGE("GpioSetDir failure, ret:%d", ret);
return HDF_FAILURE;
}
ret = GpioWrite(RESET_GPIO, GPIO_VAL_HIGH);
if (ret != HDF_SUCCESS) {
HDF_LOGE("GpioWrite failure, ret:%d", ret);
return HDF_FAILURE;
}
/* delay 20ms */
OsalMSleep(20);
return HDF_SUCCESS;
}
```
- 器件驱动入口函数
```c++
int32_t SampleEntryInit(struct HdfDeviceObject *object)
{
HDF_LOGI("%s: enter", __func__);
if (object == NULL) {
HDF_LOGE("%s: param is null!", __func__);
return HDF_FAILURE;
}
/* 器件驱动接口注册，ops提供给平台驱动调用 */
if (PanelDataRegister(&g_panelData) != HDF_SUCCESS) {
HDF_LOGE("%s: PanelDataRegister error!", __func__);
return HDF_FAILURE;
}
return HDF_SUCCESS;
}
struct HdfDriverEntry g_sampleDevEntry = {
.moduleVersion = 1,
.moduleName = "LCD_SAMPLE",
.Init = SampleEntryInit,
};
HDF_INIT(g_sampleDevEntry);
```
\ No newline at end of file
Markdown is supported
0% 或 .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑！
想要评论请 注册 或