Initial commit

goodix.pro

+TEMPLATE = app
+CONFIG += console
+CONFIG -= app_bundle
+CONFIG -= qt
+
+SOURCES += main.c

main.c

+/*
+ * (c) 2018 Exceet electronics Gmbh: Modified sample code for goodix touch controller
+ *
+ * This is goodix tool. Its purpose is to provide some information
+ * like controller and configuration version about the goodix touch
+ * controller on the spi bus.
+ *
+ * BE AWARE:
+ *  - The bus and the address is hard coded!
+ *  - This tool is simple and assumes to be the only who talks to the goodix touch.
+ *    So it can disturb a running goodix device driver or deliver wrong values.
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <linux/i2c-dev.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <stdlib.h>
+
+#define PROGRAM_VERSION "1.0"
+#define I2C_ADDR 0x5d
+#define I2C_DEVICE "/dev/i2c-3"
+
+void print_help()
+{
+    printf("Usage:\n");
+    printf(" goodix [-h|DEVICEFILE]\n");
+    printf("\n");
+    printf("DEVICEFILE  i2c bus device like 'i2c-3' (default value)\n");
+    printf(" -h         Help text\n");
+    printf("\n");
+    printf("Program version %s", PROGRAM_VERSION);
+    printf("\n");
+}
+
+int main (int argc, char **argv) {
+    char buffer[11];
+    char i2c_device[50];
+    int fd;
+
+    // set defaults
+    memset(i2c_device, '\0', sizeof(i2c_device));
+    strcpy(i2c_device, I2C_DEVICE);
+
+    if (argc > 2){
+        printf("ERROR: Too many arguments\n");
+        print_help();
+        exit(1);
+    }
+    if (2 == argc){
+        if ('-' == argv[1][0]){
+            print_help();
+            exit(1);
+        }
+        // Use device from commandline
+        strncpy(i2c_device, argv[1], sizeof(i2c_device)-1);
+    }
+
+
+    printf("i2c interface : %s\n", i2c_device);
+    printf("device addr   : 0x%02x\n", I2C_ADDR);
+
+    fd = open(i2c_device, O_RDWR);
+
+    if (fd < 0) {
+        printf("Error opening file <%s>: %s\n", I2C_DEVICE, strerror(errno));
+        return 1;
+    }
+
+    // I2C_SLAVE
+    if (ioctl(fd, I2C_SLAVE_FORCE, I2C_ADDR) < 0) {
+        printf("ioctl error: %s\n", strerror(errno));
+        return 1;
+    }
+
+    // Product ID
+    unsigned int fw_version = 0;
+    unsigned int vendor_id = 1;
+    unsigned int xres;
+    unsigned int yres;
+    char product_id[4];
+    unsigned int config_version;
+
+    // Firmware version etc
+    buffer[0]=0x81;
+    buffer[1]=0x40;
+    write(fd, buffer, 2);
+    read(fd, buffer, 11);
+
+    product_id[0] = buffer[0];
+    product_id[1] = buffer[1];
+    product_id[2] = buffer[2];
+    product_id[3] = buffer[3];
+
+    fw_version = (buffer[5] << 8) | buffer[4];
+    xres = (buffer[7] << 8) | buffer[6];
+    yres = (buffer[9] << 8) | buffer[8];
+    vendor_id = buffer[10];
+
+    // Config version
+    buffer[0]=0x80;
+    buffer[1]=0x47;
+    write(fd, buffer, 2);
+    if (-1 == read(fd, buffer, 2)){
+        printf("read error: %s\n", strerror(errno));
+        return 1;
+    }
+
+    config_version = buffer[0];
+
+    printf("product id    : %c%c%c%c\n", product_id[0], product_id[1], product_id[2], product_id[3]);
+    printf("fw version    : 0x%04X\n", fw_version);
+    printf("config version: %d (0x%02X)\n", config_version, config_version);
+    printf("resolution x/y: %dx%d\n", xres, yres);
+    printf("vendor id     : 0x%02X\n", vendor_id);
+
+    return 0;
+}