Hello, I’m a beginner. I have a project with STM32. I was able to run the LVGL application on the ST7789 display driver. However, I could not configure the GT911 touch panel driver . Can you help me with this?
I am attaching the GT911 library below. Thank you from now.
#include “…/…/GT911/Inc/GT911.h”
#include “…/…/LVGL_Library/lvgl/lvgl.h”
#include “main.h”
extern I2C_HandleTypeDef hi2c1;
extern void * memset (void *, int, size_t);
uint8_t GTDMAReadOK_F = 0;
uint8_t GTDMASendOK_F = 0;
uint8_t DMAbuf[41];
uint8_t GT911buf[41];
uint16_t IICError = 0;
GT911_Dev Dev_Now,Dev_Backup;
extern void HAL_Delay(uint32_t Delay);
/*
-
@brief IIC引脚复位程序
-
@param None
-
@retval None
*/
static void i2c_hw_reset(void)
{GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_7 | GPIO_PIN_6, GPIO_PIN_SET);if (HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_7) == GPIO_PIN_RESET ||
HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_6) == GPIO_PIN_RESET) {
//HAL_Delay(10);
}GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
hi2c1.Instance->CR1 |= I2C_CR1_SWRST;
hi2c1.Instance->CR1 &= ~I2C_CR1_SWRST;
HAL_I2C_DeInit(&hi2c1); //释放IO口为GPIO，复位句柄状态
HAL_I2C_Init(&hi2c1); //这句重新初始化I2C控制
}
/*
-
@brief GT911 初始化程序
-
@param None
-
@retval None
*/
void GT911_init()
{
Dev_Now.GT911_RST=0;
GPIO_InitTypeDef GPIO_InitStruct;GPIO_InitStruct.Pin = GT911_RST_PIN | GT911_INT_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
HAL_GPIO_Init(GT911_RST_PORT, &GPIO_InitStruct);HAL_GPIO_WritePin(GT911_RST_PORT,GT911_RST_PIN,GPIO_PIN_RESET);
HAL_Delay(1000);
HAL_GPIO_WritePin(GT911_INT_PORT,GT911_INT_PIN,GPIO_PIN_RESET);
HAL_Delay(1000);
HAL_GPIO_WritePin(GT911_RST_PORT,GT911_RST_PIN,GPIO_PIN_SET);
HAL_Delay(2000);GPIO_InitStruct.Pin = GT911_INT_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GT911_INT_PORT, &GPIO_InitStruct);lv_indev_drv_t indev_drv;
lv_indev_drv_init(&indev_drv);
indev_drv.read_cb = GT911_Scan;
indev_drv.type = LV_INDEV_TYPE_POINTER;
lv_indev_drv_register(&indev_drv);HAL_Delay(100);
Dev_Now.GT911_RST=1;
}
/*
- @brief IIC复位程序
- @param None
-
@retval None
*/
void IICReset(void)
{
SET_BIT(hi2c1.Instance->CR1, I2C_CR1_STOP); //发送一个停止位
hi2c1.State = HAL_I2C_STATE_READY; //改变IIC状态为准备状态
hi2c1.Mode = HAL_I2C_MODE_NONE; //标准模式
i2c_hw_reset(); //复位IIC总线
IICError ++; //错误次数计数
}
#define regNum 41 //读取寄存器字节数
void GT911_Scan(void)
{
uint8_t Clearbuf = 0;
uint8_t i = 0;
if (Dev_Now.Touch == 1)
{
Dev_Now.Touch = 0;
if(GTDMASendOK_F) //判断DMA是否发送完成
{
GTDMASendOK_F = 0;
if(HAL_I2C_Mem_Read_DMA(&hi2c1, CT_CMD_WR, GT911_READ_XY_REG, I2C_MEMADD_SIZE_16BIT, DMAbuf, regNum)) //IIC读取regNum个字节数据
{
IICReset(); //异常则重启IIC总线
return;
}
}
else
{
if(HAL_I2C_Mem_Write_DMA(&hi2c1, CT_CMD_WR, GT911_READ_XY_REG, I2C_MEMADD_SIZE_16BIT, &Clearbuf, 1)) //写入读取完成通知从设备
{
IICReset(); //异常则重启IIC总线
return;
}
}
}
if(GTDMAReadOK_F) //判断DMA是否接收完成
{
GTDMAReadOK_F = 0;
if ((GT911buf[0]&0x80) == 0x00) //坐标是否（或按键）已经准备好
{
if(HAL_I2C_Mem_Write_DMA(&hi2c1, CT_CMD_WR, GT911_READ_XY_REG, I2C_MEMADD_SIZE_16BIT, &Clearbuf, 1))//写入读取完成通知从设备
{
IICReset(); //异常则重启IIC总线
return;
}
}
else
{
Dev_Now.TouchpointFlag = GT911buf[0];
Dev_Now.TouchCount = GT911buf[0]&0x0f;
if(HAL_I2C_Mem_Write_DMA(&hi2c1, CT_CMD_WR, GT911_READ_XY_REG, I2C_MEMADD_SIZE_16BIT, &Clearbuf, 1))//写入读取完成通知从设备
{
IICReset(); //异常则重启IIC总线
return;
}
Dev_Now.Touchkeytrackid[0] = GT911buf[1]; //第一个触摸点的坐标
Dev_Now.X[0] = ((uint16_t)GT911buf[3] << 8) + GT911buf[2];
Dev_Now.Y[0] = ((uint16_t)GT911buf[5] << 8) + GT911buf[4];
Dev_Now.S[0] = ((uint16_t)GT911buf[7] << 8) + GT911buf[6];
Dev_Now.Touchkeytrackid[1] = GT911buf[9]; //第二个触摸点的坐标
Dev_Now.X[1] = ((uint16_t)GT911buf[11] << 8) + GT911buf[10];
Dev_Now.Y[1] = ((uint16_t)GT911buf[13] << 8) + GT911buf[12];
Dev_Now.S[1] = ((uint16_t)GT911buf[15] << 8) + GT911buf[14];
Dev_Now.Touchkeytrackid[2] = GT911buf[17]; //第三个触摸点的坐标
Dev_Now.X[2] = ((uint16_t)GT911buf[19] << 8) + GT911buf[18];
Dev_Now.Y[2] = ((uint16_t)GT911buf[21] << 8) + GT911buf[20];
Dev_Now.S[2] = ((uint16_t)GT911buf[23] << 8) + GT911buf[22];
Dev_Now.Touchkeytrackid[3] = GT911buf[25]; //第四个触摸点的坐标
Dev_Now.X[3] = ((uint16_t)GT911buf[27] << 8) + GT911buf[26];
Dev_Now.Y[3] = ((uint16_t)GT911buf[29] << 8) + GT911buf[28];
Dev_Now.S[3] = ((uint16_t)GT911buf[31] << 8) + GT911buf[30];
Dev_Now.Touchkeytrackid[4] = GT911buf[33]; //第五个触摸点的坐标
Dev_Now.X[4] = ((uint16_t)GT911buf[35] << 8) + GT911buf[34];
Dev_Now.Y[4] = ((uint16_t)GT911buf[37] << 8) + GT911buf[36];
Dev_Now.S[4] = ((uint16_t)GT911buf[39] << 8) + GT911buf[38];
for (i = 0; i< Dev_Backup.TouchCount;i++) //检查触摸点的坐标边界
{
if(Dev_Now.Y[i]<20)Dev_Now.Y[i]=20;
if(Dev_Now.Y[i]>GT911_MAX_HEIGHT-20)Dev_Now.Y[i]=GT911_MAX_HEIGHT-20;
if(Dev_Now.X[i]<20)Dev_Now.X[i]=20;
if(Dev_Now.X[i]>GT911_MAX_WIDTH-20)Dev_Now.X[i]=GT911_MAX_WIDTH-20;
}
for (i=0;i<Dev_Now.TouchCount;i++)
{
if(Dev_Now.Y[i]<20)Dev_Now.Y[i]=20;
if(Dev_Now.Y[i]>GT911_MAX_HEIGHT-20)Dev_Now.Y[i]=GT911_MAX_HEIGHT-20;
if(Dev_Now.X[i]<20)Dev_Now.X[i]=20;
if(Dev_Now.X[i]>GT911_MAX_WIDTH-20)Dev_Now.X[i]=GT911_MAX_WIDTH-20;
Dev_Backup.X[i] = Dev_Now.X[i];
Dev_Backup.Y[i] = Dev_Now.Y[i];
Dev_Backup.TouchCount = Dev_Now.TouchCount;
}
}
}
}