Hi there. I require assistance to ensure the proper operation of GT9271.
After properly RESETting the GT9271, and issuing the 0XBA I2C address, the device keeps pulling the INT pin without any touch on the LCD display (1024x600). I really feel a lack of information, and the datasheet does not give a good description of the registers.
This is my code!
#include <main.h>
#include <DLY.h>
#include <stdint.h>
uint8_t FLAG_TP, CXY_BFR[4];
uint16_t TPX, TPY;
uint8_t TP_CNF_INIT[]= //188b
{
0X00, //REGISTER_HIGH
0X00, //REGISTER LOW
0X81, //0X8047 -> 0b10000001
0X00, //0X8048 -> 0b00000000 X-> OUTPUT MAX LOW BYTE
0X04, //0X8049 -> 0b00000100 X-> OUTPUT MAX HIGH BYTE (0X0400 = 1024)
0X58, //0X804A -> 0b01011000 Y-> OUTPUT MAX LOW BYTE
0X02, //0X804B -> 0b00000010 Y-> OUTPUT MAX HIGH BYTE (0X0258 = 600)
0X01, //0X804C -> 0b00001010 TOUCH NUMBER -> 1 POINT ONLY
0X00, //0X804D -> 0B00000000 INT FALLING EDGE
0X20, //0X804E ->
0X01, //0X804F ->
0X08, //0X8050 ->
0X28, //0X8051 ->
0X05, //0X8052 ->
0X50, //0X8053 ->
0X3C, //0X8054 ->
0X0F, //0X8055 ->
0X05, //0X8056 ->
0X00, //0X8057 ->
0X00, //0X8058 ->
0X00, //0X8059 ->
0X00, //0X805A ->
0X00, //0X805B ->
0X00, //0X805C ->
0X00, //0X805D ->
0X00, //0X805E ->
0X00, //0X805F ->
0X00, //0X8060 ->
0X00, //0X8061 ->
0X89, //0X8062 ->
0X2A, //0X8063 ->
0X0B, //0X8064 ->
0X2D, //0X8065 ->
0X2B, //0X8066 ->
0X0F, //0X8067 ->
0X0A, //0X8068 ->
0X00, //0X8069 ->
0X00, //0X806A ->
0X01, //0X806B ->
0XA9, //0X806C ->
0X03, //0X806D ->
0X2D, //0X806E ->
0X00, //0X806F ->
0X01, //0X8070 ->
0X00, //0X8071 ->
0X00, //0X8072 ->
0X00, //0X8073 ->
0X03, //0X8074 ->
0X00, //0X8075 ->
0X00, //0X8076 ->
0X00, //0X8077 ->
0X00, //0X8078 ->
0X00, //0X8079 ->
0X21, //0X807A ->
0X59, //0X807B ->
0X94, //0X807C ->
0XC5, //0X807D ->
0X02, //0X807E ->
0X07, //0X807F ->
0X00, //0X8080 ->
0X00, //0X8081 ->
0X04, //0X8082 ->
0X93, //0X8083 ->
0X24, //0X8084 ->
0X00, //0X8085 ->
0X7D, //0X8086 ->
0X2C, //0X8087 ->
0X00, //0X8088 ->
0X6B, //0X8089 ->
0X36, //0X808A ->
0X00, //0X808B ->
0X5D, //0X808C ->
0X42, //0X808D ->
0X00, //0X808E ->
0X53, //0X808F ->
0X50, //0X8090 ->
0X00, //0X8091 ->
0X53, //0X8092 ->
0X00, //0X8093 ->
0X00, //0X8094 ->
0X00, //0X8095 ->
0X00, //0X8096 ->
0X00, //0X8097 ->
0X00, //0X8098 ->
0X00, //0X8099 ->
0X00, //0X809A ->
0X00, //0X809B ->
0X00, //0X809C ->
0X00, //0X809D ->
0X00, //0X809E ->
0X00, //0X809F ->
0X00, //0X80A0 ->
0X00, //0X80A1 ->
0X00, //0X80A2 ->
0X00, //0X80A3 ->
0X00, //0X80A4 ->
0X00, //0X80A5 ->
0X00, //0X80A6 ->
0X00, //0X80A7 ->
0X00, //0X80A8 ->
0X00, //0X80A9 ->
0X00, //0X80AA ->
0X00, //0X80AB ->
0X00, //0X80AC ->
0X00, //0X80AD ->
0X00, //0X80AE ->
0X00, //0X80AF ->
0X00, //0X80B0 ->
0X00, //0X80B1 ->
0X00, //0X80B2 ->
0X00, //0X80B3 ->
0X00, //0X80B4 ->
0X00, //0X80B5 ->
0X00, //0X80B6 ->
0X02, //0X80B7 ->
0X04, //0X80B8 ->
0X06, //0X80B9 ->
0X08, //0X80BA ->
0X0A, //0X80BB ->
0X0C, //0X80BC ->
0X0E, //0X80BD ->
0X10, //0X80BE ->
0X12, //0X80BF ->
0X14, //0X80C0 ->
0X16, //0X80C1 ->
0XFF, //0X80C2 ->
0XFF, //0X80C3 ->
0XFF, //0X80C4 ->
0X00, //0X80C5 ->
0X00, //0X80C6 ->
0X00, //0X80C7 ->
0X00, //0X80C8 ->
0X00, //0X80C9 ->
0X00, //0X80CA ->
0X00, //0X80CB ->
0X00, //0X80CC ->
0X00, //0X80CD ->
0X00, //0X80CE ->
0X00, //0X80CF ->
0X00, //0X80D0 ->
0X00, //0X80D1 ->
0X00, //0X80D2 ->
0X00, //0X80D3 ->
0X00, //0X80D4 ->
0X00, //0X80D5 ->
0X02, //0X80D6 ->
0X04, //0X80D7 ->
0X06, //0X80D8 ->
0X08, //0X80D9 ->
0X0A, //0X80DA ->
0X0F, //0X80DB ->
0X10, //0X80DC ->
0X12, //0X80DD ->
0X16, //0X80DE ->
0X18, //0X80DF ->
0X1C, //0X80E0 ->
0X1D, //0X80E1 ->
0X1E, //0X80E2 ->
0X1F, //0X80E3 ->
0X20, //0X80E4 ->
0X21, //0X80E5 ->
0X22, //0X80E6 ->
0X24, //0X80E7 ->
0XFF, //0X80E8 ->
0XFF, //0X80E9 ->
0XFF, //0X80EA ->
0XFF, //0X80EB ->
0XFF, //0X80EC ->
0XFF, //0X80ED ->
0XFF, //0X80EE ->
0X00, //0X80EF ->
0X00, //0X80F0 ->
0X00, //0X80F1 ->
0X00, //0X80F2 ->
0X00, //0X80F3 ->
0X00, //0X80F4 ->
0X00, //0X80F5 ->
0X00, //0X80F6 ->
0X00, //0X80F7 ->
0X00, //0X80F8 ->
0X00, //0X80F9 ->
0X00, //0X80FA ->
0X00, //0X80FB ->
0X00, //0X80FC ->
0X00, //0X80FD ->
0X00, //0X80FE ->
0XD6, //0X80FF ->
0X01 //0X8100 ->
};
void TP_RESET() //RESET GT9721 AND DEVICE ADDRESS = 0XBA
{
GPIOB -> BSRR = 1<<(14+16); //TP_RST RESET -> PB14
DEL_MS(25);
GPIOB -> BSRR = 1<<14; //TP_RST SET -> PB14
DEL_MS(50); //ADDRESS SET 0XBA
DEL_MS(50); //ADDRESS SET 0XBA
}
void TP_INIT() //GT9721 INITIALIZATION
{
TP_CNF_INIT[0]=0X80; //FIRST REGISTER ADDRESS
TP_CNF_INIT[1]=0X47; //SECOND REGISTER ADDRESS
HAL_I2C_Master_Transmit(&hi2c1, GT9271_ADDR_W, TP_CNF_INIT, sizeof(TP_CNF_INIT), 100);
}
void TP_GET_XY() //GET TP X + Y COORDNATES
{
TP_CNF_INIT[0]=0X81; //FIRST REGISTER ADDRESS
TP_CNF_INIT[1]=0X50; //SECOND REGISTER ADDRESS
HAL_I2C_Master_Transmit(&hi2c1, GT9271_ADDR_W, TP_CNF_INIT, 2, 100);
HAL_I2C_Master_Receive(&hi2c1, GT9271_ADDR_R, CXY_BFR, 4, 100);
TPX=(CXY_BFR[1]<<8) + CXY_BFR[0];
TPY=(CXY_BFR[3]<<8) + CXY_BFR[2];
HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_13); //TEST ONLY
FLAG_TP=0X00;
}As you can see, it keeps trigring INT pin withouT any reason.
Please help me to proper configure the GT9721 to my lcd, ER-TFTM101-1.
Thank you!
