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/*
* Copyright (c) 2006-2025, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2025-05-23 godmial Refactor to conform to RT-Thread coding style.
*/
#ifndef __TOUCH_H__
#define __TOUCH_H__
#include "stdio.h"
#include "string.h"
#include "gd32f4xx.h"
#define SCL_RCU RCU_GPIOB
#define SCL_PORT GPIOB
#define SCL_PIN GPIO_PIN_6
#define SCL_ON gpio_bit_set(SCL_PORT, SCL_PIN)
#define SCL_OFF gpio_bit_reset(SCL_PORT, SCL_PIN)
#define SCL_TOGGLE gpio_bit_toggle(SCL_PORT, SCL_PIN)
#define SDA_RCU RCU_GPIOB
#define SDA_PORT GPIOB
#define SDA_PIN GPIO_PIN_7
#define SDA_ON gpio_bit_set(SDA_PORT, SDA_PIN)
#define SDA_OFF gpio_bit_reset(SDA_PORT, SDA_PIN)
#define SDA_TOGGLE gpio_bit_toggle(SDA_PORT, SDA_PIN)
/* IO direction settings */
#define CT_SDA_IN() gpio_mode_set(SCL_PORT, GPIO_MODE_INPUT, GPIO_PUPD_PULLUP, SDA_PIN); /* {GPIOF->MODER&=~(3<<(2*11));GPIOF->MODER|=0<<2*11;} //PF11输入模式 */
#define CT_SDA_OUT() gpio_mode_set(SCL_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_PULLUP, SDA_PIN); /* {GPIOF->MODER&=~(3<<(2*11));GPIOF->MODER|=1<<2*11;} //PF11输出模式 */
/* IO operations */
#define CT_IIC_SCL /* PBout(0) //SCL */
#define CT_IIC_SDA(val) ((val) == 1 ? SDA_ON : SDA_OFF) /* PFout(11) //SDA */
#define CT_READ_SDA gpio_input_bit_get(SDA_PORT, SDA_PIN) /* PFin(11) //输入SDA */
/* Reset and interrupt pin definitions */
#define RST_RCU RCU_GPIOD
#define RST_PORT GPIOD
#define RST_PIN GPIO_PIN_12
#define RST_ON gpio_bit_set(RST_PORT, RST_PIN);
#define RST_OFF gpio_bit_reset(RST_PORT, RST_PIN);
#define RST_TOGGLE gpio_bit_toggle(RST_PORT, RST_PIN);
#define INT_RCU RCU_GPIOD
#define INT_PORT GPIOD
#define INT_PIN GPIO_PIN_11
#define INT_ON gpio_bit_set(INT_PORT, INT_PIN);
#define INT_OFF gpio_bit_reset(INT_PORT, INT_PIN);
#define INT_TOGGLE gpio_bit_toggle(INT_PORT, INT_PIN);
/* I2C command definitions */
#define FT_CMD_WR 0X70 /**< FT5206 write command */
#define FT_CMD_RD 0X71 /**< FT5206 read command */
/* FT5206 register definitions */
#define FT_DEVIDE_MODE 0x00 /**< Mode control register */
#define FT_REG_NUM_FINGER 0x02 /**< Touch status register */
#define FT_TP1_REG 0x03 /**< Touch point 1 data */
#define FT_TP2_REG 0x09 /**< Touch point 2 data */
#define FT_TP3_REG 0x0F /**< Touch point 3 data */
#define FT_TP4_REG 0x15 /**< Touch point 4 data */
#define FT_TP5_REG 0x1B /**< Touch point 5 data */
#define FT_ID_G_LIB_VERSION 0xA1 /**< Firmware version */
#define FT_ID_G_MODE 0xA4 /**< Interrupt mode control */
#define FT_ID_G_THGROUP 0x80 /**< Touch sensitivity */
#define FT_ID_G_PERIODACTIVE 0x88 /**< Active period register */
#define TP_PRES_DOWN 0x80 /**< Touch pressed flag */
#define TP_CATH_PRES 0x40 /**< Key press detected flag */
#define CT_MAX_TOUCH 5 /**< Maximum number of supported touch points */
/**
* @brief Touch point device structure.
*/
typedef struct
{
uint16_t x[CT_MAX_TOUCH]; /**< X coordinates of touch points */
uint16_t y[CT_MAX_TOUCH]; /**< Y coordinates of touch points */
uint8_t sta; /**< Touch status flag */
float xfac; /**< X axis scaling factor */
float yfac; /**< Y axis scaling factor */
short xoff; /**< X axis offset */
short yoff; /**< Y axis offset */
uint8_t touchtype; /**< Touch type flag */
} _m_tp_dev;
extern _m_tp_dev tp_dev;
/**
* @brief Initialize I2C GPIO lines.
*/
void CT_IIC_Init(void);
/**
* @brief Generate I2C start condition.
*/
void CT_IIC_Start(void);
/**
* @brief Generate I2C stop condition.
*/
void CT_IIC_Stop(void);
/**
* @brief Send a byte over I2C.
*
* @param txd Byte to send.
*/
void CT_IIC_Send_Byte(uint8_t txd);
/**
* @brief Read a byte over I2C.
*
* @param ack 1 to send ACK after read, 0 for NACK.
*
* @return The received byte.
*/
uint8_t CT_IIC_Read_Byte(unsigned char ack);
/**
* @brief Wait for I2C ACK.
*
* @return 0 on success, non-zero on timeout.
*/
uint8_t CT_IIC_Wait_Ack(void);
/**
* @brief Generate I2C ACK.
*/
void CT_IIC_Ack(void);
/**
* @brief Generate I2C NACK.
*/
void CT_IIC_NAck(void);
/**
* @brief Write data to FT5206 register.
*
* @param reg Register address.
* @param buf Pointer to data.
* @param len Number of bytes to write.
*
* @return 0 if success, non-zero otherwise.
*/
uint8_t FT5206_WR_Reg(uint16_t reg, uint8_t *buf, uint8_t len);
/**
* @brief Read data from FT5206 register.
*
* @param reg Register address.
* @param buf Buffer to store data.
* @param len Number of bytes to read.
*/
void FT5206_RD_Reg(uint16_t reg, uint8_t *buf, uint8_t len);
/**
* @brief Initialize the FT5206 touch controller.
*
* @return 0 if successful.
*/
uint8_t FT5206_Init(void);
/**
* @brief Poll the FT5206 for touch input.
*
* @param mode Scan mode.
*
* @return 1 if touch detected, 0 otherwise.
*/
uint8_t FT5206_Scan(uint8_t mode);
/**
* @brief Wait until touch contact leaves specified area.
*
* @param contact Touch point index.
* @param sx Start X coordinate.
* @param sy Start Y coordinate.
* @param ex End X coordinate.
* @param ey End Y coordinate.
*/
void letgo_scan(uint16_t contact, uint16_t sx, uint16_t sy, uint16_t ex, uint16_t ey);
#endif
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