Diff: TS_I2C.c

Revision:

0:f69f52bd2222

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TS_I2C.c	Mon Mar 12 11:57:30 2012 +0000
@@ -0,0 +1,75 @@
+/**
+* @file STM811.c
+* @brief library TouchScreen STM811
+* @author Frederic BLANC
+*/
+
+
+#include "TS.h"
+I2C i2c(P0_10, P0_11);//P0_10 SDA2 P0_11 SCL2
+int TS_Init (void) {
+    int err=0;
+//	err+=TS_Write (TS_TSC_CTRL, 0x03);		/* TSC_CTRL register   X, Y only mode, enable             */    
+//    err+=TS_Write (TS_SYS_CTRL1, 0x02);      /* Reset Touch-screen controller      */
+//    wait_ms(10);								/* Wait minimum of 10ms               */
+    err+=TS_Write (TS_SYS_CTRL2, SYS_CTRL2_TS_OFF | SYS_CTRL2_GPIO_OFF);      /* 1.Enable TSC and ADC                 */
+    err+=TS_Write (TS_INT_EN, INT_TOUCH_DET);       	/* 2.Enable Touch detect, FIFO          */
+    err+=TS_Write (TS_ADC_CTRL1, 0x69);      /* 3.Set sample time , 12-bit mode      */
+    wait_ms(2);									/* Wait minimum of 2ms                */
+    err+=TS_Write (TS_ADC_CTRL2, 0x01);      /* 4.ADC frequency 3.25 MHz             */
+	err+=TS_Write (TS_GPIO_AF, 0x00);		 /* 5. ALL IO in ADC/TS mode            */
+    err+=TS_Write (TS_TSC_CFG, 0xF5);       	/* 6. Set TSC_CFG register               */
+    err+=TS_Write (TS_FIFO_TH, 0x01);       	/* 6a.Threshold for FIFO                 */
+    err+=TS_Write (TS_FIFO_STA, 0x01);       /* 7.FIFO reset                         */
+    err+=TS_Write (TS_FIFO_STA, 0x00);       /* 8.FIFO not reset                     */
+    err+=TS_Write (TS_TSC_FRACTION_Z, 0x07); /* 9.Fraction z                         */
+    err+=TS_Write (TS_TSC_I_DRIVE, 0x01);    /* 10.Drive 50 mA typical                */
+    err+=TS_Write (TS_TSC_CTRL, 0x01);       /* 11.Enable TSC                         */
+    err+=TS_Write (TS_INT_STA, 0xFF);			/* 12.Clear interrupt status             */
+    err+=TS_Write (TS_INT_CTRL, 0x01);       /* 13.Enable global interrupt            */
+
+    return err;
+}
+
+int TS_Write (unsigned char reg,unsigned int val) {
+    int err=0;
+    int addr =0x82;
+    char cmd[2];
+    cmd[0] = reg;            // Register to be written
+	cmd[1] = val;
+    err+=i2c.write(addr, cmd,2); // Send addr cmd val
+    return err;
+}
+
+unsigned int TS_Read (unsigned char reg, int num) {
+    int addr =(0x82 | 0);
+    unsigned int idata;
+	char* data=(char*) &idata;
+	data[1] =data[2] =data[3] =0;
+    data[0] = reg;            // Register to be written
+    i2c.write(addr, data,1); // Send command string
+	do{
+		i2c.read (addr, &data[--num], 1);
+	}while (num);
+	return idata;
+
+}
+
+int ts_XY( int *x,int *y,int *z) {
+    int  tch_z   = 0;
+    int tch_int  =  0;
+    int tch_smpl =  0;
+	tch_int = TS_Read (TS_INT_STA, 1);    /* Read Touch-screen interrupt status */
+        if (tch_int & 2) {            /* If FIFO is above threshold         */
+            tch_smpl = TS_Read (TS_FIFO_SIZE, 1);
+            while (--tch_smpl) {
+                TS_Read (TS_TSC_DATA_NAI, 4);
+            }
+		}
+            tch_z = TS_Read (TS_TSC_DATA_NAI, 4);  /* Read coordinates                   */
+            *x = (tch_z >> 20) & 0x00000FFF;
+            *y = (tch_z >>  8) & 0x00000FFF;
+            *z = (tch_z >>  0) & 0x0000000F;
+    return 0;
+
+}