Diff: readme.md

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+#include "mbed.h"
+#include "HTS221_driver.h"
+
+/*------------------------------------------------------------------------------
+Before to use this example, ensure that you an hyperterminal installed on your
+computer. More info here: https://developer.mbed.org/handbook/Terminals
+
+The default serial comm port uses the SERIAL_TX and SERIAL_RX pins (see their
+definition in the PinNames.h file).
+
+The default serial configuration in this case is 9600 bauds, 8-bit data, no parity
+
+If you want to change the baudrate for example, you have to redeclare the
+serial object in your code:
+
+Serial pc(SERIAL_TX, SERIAL_RX);
+
+Then, you can modify the baudrate and print like this:
+
+pc.baud(115200);
+pc.printf("Hello World !\n");
+------------------------------------------------------------------------------*/
+
+//https://www.cnblogs.com/zlbg/p/4216251.html
+
+DigitalOut myled(LED1);
+DigitalOut led(LED1);
+
+I2C i2c(I2C_SDA, I2C_SCL);
+HTS221Sensor hts221;
+char data_write[2];
+char data_read[4];
+
+
+float t0, t1, h0, h1;
+int t0out, t1out, h0out, h1out;
+
+int16_t outHumi = 0;
+int16_t outTemp = 0;
+
+float valueHumi = 0;
+float valueTemp = 0;
+
+
+
+float mapFloat(int x, int in_min, int in_max, float out_min, float out_max)
+{
+    return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
+}
+
+
+void read_calidata0()
+{
+
+//Read Cali Data
+
+    //read out t0degCx8, t1degCx8
+    data_write[0] = HTS221_T0_DEGC_X8;
+    i2c.write(0xBE, data_write, 1, 1);
+    i2c.read(0xBF,data_read, 4, 0);
+
+
+
+
+    int t0degCx8 = ((data_read[3] & 0b00000011) << 8) | data_read[0];
+    int t1degCx8 = ((data_read[3] & 0b00001100) << 6) | data_read[1];
+    t0 = t0degCx8/8.0;
+    t1 = t1degCx8/8.0;
+
+    //read out t0out, t1out
+
+    data_write[0] = HTS221_T0_OUT_L |0x80;
+    i2c.write(0xBE, data_write, 1, 1);
+    i2c.read(0xBF,data_read, 4, 0);
+
+    t0out = (data_read[1] << 8) | data_read[0];
+    t1out = (data_read[3] << 8) | data_read[2];
+
+
+    //read out h0RHx2, h1RHx2
+    data_write[0] = HTS221_H0_RH_X2 |0x80;
+    i2c.write(0xBE, data_write, 1, 1);
+    i2c.read(0xBF,data_read, 2, 0);
+
+    unsigned char h0RHx2  =  data_read[0];
+    unsigned char h1RHx2  =  data_read[1];
+
+    h0 = h0RHx2/2.0;
+    h1 = h1RHx2/2.0;
+
+    //read out h0t0Out
+
+    data_write[0] = HTS221_H0_T0_OUT_L |0x80;
+    i2c.write(0xBE, data_write, 1, 1);
+    i2c.read(0xBF,data_read, 2, 0);
+
+    h0out   =  (data_read[1] << 8) | data_read[0];
+
+
+    //read out h1t0Out
+    data_write[0] = HTS221_H1_T0_OUT_L |0x80;
+    i2c.write(0xBE, data_write, 1, 1);
+    i2c.read(0xBF,data_read, 2, 0);
+
+    h1out   =  (data_read[1] << 8) | data_read[0];
+
+    //print the calibration coefficients
+    printf("Calibration coefficients: \r\n");
+    printf("t0 =%f `C t0out = %d \r\n",t0,t0out);
+    printf("t1 =%f `C t1out = %d \r\n",t1,t1out);
+    printf("h0 =%f RH h0out = %d \r\n",h0,h0out);
+    printf("h1 =%f RH h1out = %d \r\n",h1,h1out);
+    printf("------------------------\r\n");
+
+}
+
+HTS221_Error_et HTS221_Get_Temperature1(int16_t *value)
+{
+    int16_t T0_out,T1_out,T_out,T0_degC_x8_u16,T1_degC_x8_u16;
+    int16_t T0_degC, T1_degC;
+    uint8_t buffer[4], tmp;
+    uint32_t tmp32;
+
+    /*1. Read from 0x32 & 0x33 registers the value of coefficients T0_d egC_x8 and T1_de gC_x8*/
+    data_write[0] = HTS221_T0_DEGC_X8;
+    i2c.write(0xBE, data_write, 1, 1);
+    i2c.read(0xBF,(char*)buffer, 2, 0);
+
+    /*2. Read from 0x35 register the value of the MSB bits of T1_deg C and T0_deg C */
+    data_write[0] = HTS221_T0_T1_DEGC_H2;
+    i2c.write(0xBE, data_write, 1, 1);
+    i2c.read(0xBF,(char*)&tmp, 1, 0);
+
+    /*Calculate the T0_deg C and T1_deg C values*/
+
+    T0_degC_x8_u16 = (((uint16_t)(tmp & 0x03)) << 8) | ((uint16_t)buffer[0]);
+    T1_degC_x8_u16 = (((uint16_t)(tmp & 0x0C)) << 6) | ((uint16_t)buffer[1]);
+    T0_degC = T0_degC_x8_u16>>3;
+    T1_degC = T1_degC_x8_u16>>3;
+
+    /*3. Read from 0x3C & 0x3D registers the value of T0_OUT*/
+    /*4. Read from 0x3E & 0x3F registers the value of T1_OUT*/
+
+    data_write[0] = HTS221_T0_OUT_L |0x80;
+    i2c.write(0xBE, data_write, 1, 1);
+    i2c.read(0xBF,(char*)buffer, 4, 0);
+
+    T0_out = (((uint16_t)buffer[1])<<8) | (uint16_t)buffer[0];
+    T1_out = (((uint16_t)buffer[3])<<8) | (uint16_t)buffer[2];
+
+    /* 5.Read from 0x2A & 0x2B registers the value T_OUT (ADC _OUT).*/
+
+    data_write[0] = HTS221_TEMP_OUT_L_REG;
+    i2c.write(0xBE, data_write, 1, 1);
+    i2c.read(0xBF,(char*)buffer, 2, 0);
+
+    T_out = (((uint16_t)buffer[1])<<8) | (uint16_t)buffer[0];
+
+    /* 6. Compute the Temperature value by linea r interpolation*/
+    tmp32 = ((uint32_t)(T_out - T0_out)) * ((uint32_t)(T1_degC - T0_degC)*10);
+    *value = tmp32 /(T1_out - T0_out) + T0_degC*10;
+
+    return HTS221_OK;
+
+
+}
+
+int main()
+{
+    HTS221_Error_et ret;
+    uint8_t deviceid;
+    
+    HTS221_Get_DeviceID(&deviceid);
+
+    HTS221_Init_st init_st;
+    init_st.avg_h = HTS221_AVGH_4;
+    init_st.avg_t = HTS221_AVGT_4;
+    init_st.odr = HTS221_ODR_1HZ;
+    init_st.bdu_status = HTS221_ENABLE;
+    init_st.heater_status = HTS221_ENABLE;
+    init_st.irq_level = HTS221_HIGH_LVL;
+    init_st.irq_output_type = HTS221_PUSHPULL;
+    init_st.irq_enable = HTS221_DISABLE;
+
+    HTS221_Set_InitConfig(&init_st);
+
+
+
+    if(deviceid != HTS221_WHO_AM_I_VAL) {
+        printf("HTS221 Not Found!\r\n");
+        while(1) {
+            myled=!myled;
+            wait(0.2);
+        }
+    } else {
+        printf("HTS221 Has Found!\r\n");
+    }
+
+    HTS221_Activate();
+
+
+
+    HTS221_BitStatus_et mode;
+    HTS221_Get_PowerDownMode(&mode);
+    if(mode == HTS221_SET) {
+        printf("HTS221 in power down mode\r\n");
+
+        ret = HTS221_Set_PowerDownMode(HTS221_RESET);
+        if(ret != HTS221_OK) {
+            printf("HTS221_Set_PowerDownMode failed");
+        }
+    }
+    HTS221_Get_PowerDownMode(&mode);
+    if(mode == HTS221_SET) {
+        printf("HTS221 in power down mode\r\n");
+
+        ret = HTS221_Set_PowerDownMode(HTS221_RESET);
+        if(ret != HTS221_OK) {
+            printf("HTS221_Set_PowerDownMode failed");
+        }
+    }
+
+    HTS221_Set_BduMode(HTS221_DISABLE);
+
+    uint16_t humidity;
+    int16_t temperature;
+    uint16_t humi;
+    int16_t temp;
+    int16_t temp2;
+
+
+
+    HTS221_DrdyLevel_et level = HTS221_LOW_LVL ;
+
+    printf("pre level=%02x\r\n",level);
+
+    HTS221_Set_IrqActiveLevel(HTS221_HIGH_LVL);
+
+
+    HTS221_Get_IrqActiveLevel(&level);
+
+    printf("aft level=%d\r\n",level);
+
+
+    //  while(1) {
+//    HTS221_StartOneShotMeasurement();
+//
+//    ret = HTS221_Get_Measurement(&humidity,&temperature);
+//    if(ret==HTS221_OK){
+//        printf("humidity:%d%%,temperature:%dC\r\n",humidity/10,temperature/10);
+//    }else
+//    {
+//        printf("GET Measurement failed\r\n");
+//    }
+//    ret = HTS221_Get_Humidity(&humi);
+//      if(ret==HTS221_OK){
+//        printf("humi:%d\r\n",humi);
+//    }else
+//    {
+//        printf("GET humi failed\r\n");
+//    }
+//
+//    ret = HTS221_Get_Temperature(&temp);
+//    if(ret==HTS221_OK){
+//        printf("temp:%d\r\n",temp);
+//    }else
+//    {
+//        printf("GET temp failed\r\n");
+//    }
+//
+//
+//
+//     ret = HTS221_Get_Temperature1(&temp2);
+//
+//    if(ret==HTS221_OK){
+//        printf("temp2:%d\r\n",temp2);
+//    }else
+//    {
+//        printf("GET temp2 failed\r\n");
+//    }
+//
+//
+//    wait(1);
+//    }
+
+
+
+    //Find the HTS221
+    data_write[0] = HTS221_WHO_AM_I_REG;
+    i2c.write(0xBE, data_write, 1, 1);
+    i2c.read(0xBF,data_read, 1, 0);
+
+
+    //turn on the HTS221, set the update mode to one shot
+    data_write[0] = HTS221_CTRL_REG1;
+    data_write[1] = 0x84;
+    int status = i2c.write(0xBE, data_write, 2, 0);
+    if(status!=0) {
+        while(1) {
+            myled=!myled;
+            wait(0.2);
+        }
+    }
+
+    read_calidata0();
+
+
+    while(1) {
+        //perform a measurement
+        data_write[0] = HTS221_CTRL_REG2;
+        data_write[1] = 0x01;
+        i2c.write(0xBE, data_write, 2, 0);
+        //check the status
+        status = 0;
+        while (status != 0x03) { //typical conversition time: 3ms
+
+
+            wait(0.3);
+            data_write[0] = HTS221_STATUS_REG;
+            i2c.write(0xBE, data_write, 1, 0);
+            i2c.read(0xBF,data_read, 1, 0);
+            status = data_read[0];
+
+            wait(0.1);
+//            printf("status:%d\r\n",status);
+        }
+
+        //read multiple bytes incrementing the register address
+
+        data_write[0] = HTS221_HR_OUT_L_REG |0x80;
+        i2c.write(0xBE, data_write, 1, 1);
+        i2c.read(0xBF,data_read, 4, 0);
+
+        outHumi = (data_read[1] << 8) | data_read[0];
+        outTemp = (data_read[3] << 8) | data_read[2];
+
+        valueTemp = mapFloat(outTemp, t0out, t1out, t0, t1);
+        valueHumi = mapFloat(outHumi, h0out, h1out, h0, h1);
+
+        printf("Temp:%f `C Humi:%f RH \r\n",valueTemp,valueHumi);
+
+
+
+        led = !led; // Toggle LED
+        wait(3); // 1 second
+    }
+}