GT9XX chip, on the basis of spec book +linux Drive, ported to USB bare metal experience. Directly with the development Board, do not touch the pit of the hardware.

1. Verify the data format with kernel code and spec book:

// Command 3 bytes, IC address U8  end_cmd[380xFF0}; // total length first 3 bytes, Max points *8, plus 1    U8  point_data[218180xFF};

2, read the data: Call the STM32 method and convert the original method. and used to read the version number

 1 , Read data from   the i²c slave device.    INPUT:CLIENT:I2C device. buf[ 0  ~1   2  ~len-1  ]: Read data buffer. len:gtp_addr_length  + read bytes count that buf total length outp Ut:numbers of I2c_msgs to transfer: Return data  2  : Succeed, otherwise:failed  *********************************************************/s32 gtp_i2c_read ( struct  i2c_client *client, U8 *buf, S32 len) 

//2, start reading the specified number of data at the specified address in the At24cxx // devaddr, set the I²c address, such as FT is 0x36 // READADDR: The address to begin reading out // pdata1: buf to receive data // size,buf length u8 i2c_read0 (U8 devaddr,u16 readaddr,u8 *pdata1,u8 size)

3, convert instance, call in Main.c, verify success:

U8 buf[8] = {Gtp_reg_version >>8, Gtp_reg_version &0xFF};//version is double-byte, here is the high-byte, low -byteRET = gtp_i2c_read (client, buf,sizeof(BUF)); = U8 buf[8] = {Gtp_reg_version >>8, Gtp_reg_version &0xFF}; //The first 2 bytes have been stored in gtp_reg_version, starting from buf[2], where the data structure remains consistent for subsequent code BUF[8]RET =i2c_read0 (0x5c, Gtp_reg_version, buf[2],6) i2c_read0 (0x5c, gtp_reg_version)//U16 with Double byte.

  3, overwrite interrupt function processing, look at the driver code, delete all that will not be executed, keep only#if gtp_slide_wakeup #endif标示 to facilitate and drive code control

GT9XX chip, on the basis of spec book +linux Drive, ported to USB bare metal experience. Directly with the development Board, do not touch the pit of the hardware.