File content as of revision 0:2a9b1bf70f5e:

#include "mbed.h"
#include "C12832.h"
#include "USB400Serial.h"

C12832 lcd(p5, p7, p6, p8, p11);

DigitalOut led1(LED1);
DigitalOut led2(LED2);
DigitalOut led3(LED3);
DigitalOut led4(LED4);
Serial pc(USBTX, USBRX);

uint8_t u8CRC8Table[256] = {
    0x00, 0x07, 0x0e, 0x09, 0x1c, 0x1b, 0x12, 0x15,
    0x38, 0x3f, 0x36, 0x31, 0x24, 0x23, 0x2a, 0x2d,
    0x70, 0x77, 0x7e, 0x79, 0x6c, 0x6b, 0x62, 0x65,
    0x48, 0x4f, 0x46, 0x41, 0x54, 0x53, 0x5a, 0x5d,
    0xe0, 0xe7, 0xee, 0xe9, 0xfc, 0xfb, 0xf2, 0xf5,
    0xd8, 0xdf, 0xd6, 0xd1, 0xc4, 0xc3, 0xca, 0xcd,
    0x90, 0x97, 0x9e, 0x99, 0x8c, 0x8b, 0x82, 0x85,
    0xa8, 0xaf, 0xa6, 0xa1, 0xb4, 0xb3, 0xba, 0xbd,
    0xc7, 0xc0, 0xc9, 0xce, 0xdb, 0xdc, 0xd5, 0xd2,
    0xff, 0xf8, 0xf1, 0xf6, 0xe3, 0xe4, 0xed, 0xea,
    0xb7, 0xb0, 0xb9, 0xbe, 0xab, 0xac, 0xa5, 0xa2,
    0x8f, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9d, 0x9a,
    0x27, 0x20, 0x29, 0x2e, 0x3b, 0x3c, 0x35, 0x32,
    0x1f, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0d, 0x0a,
    0x57, 0x50, 0x59, 0x5e, 0x4b, 0x4c, 0x45, 0x42,
    0x6f, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7d, 0x7a,
    0x89, 0x8e, 0x87, 0x80, 0x95, 0x92, 0x9b, 0x9c,
    0xb1, 0xb6, 0xbf, 0xb8, 0xad, 0xaa, 0xa3, 0xa4,
    0xf9, 0xfe, 0xf7, 0xf0, 0xe5, 0xe2, 0xeb, 0xec,
    0xc1, 0xc6, 0xcf, 0xc8, 0xdd, 0xda, 0xd3, 0xd4,
    0x69, 0x6e, 0x67, 0x60, 0x75, 0x72, 0x7b, 0x7c,
    0x51, 0x56, 0x5f, 0x58, 0x4d, 0x4a, 0x43, 0x44,
    0x19, 0x1e, 0x17, 0x10, 0x05, 0x02, 0x0b, 0x0c,
    0x21, 0x26, 0x2f, 0x28, 0x3d, 0x3a, 0x33, 0x34,
    0x4e, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5c, 0x5b,
    0x76, 0x71, 0x78, 0x7f, 0x6A, 0x6d, 0x64, 0x63,
    0x3e, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2c, 0x2b,
    0x06, 0x01, 0x08, 0x0f, 0x1a, 0x1d, 0x14, 0x13,
    0xae, 0xa9, 0xa0, 0xa7, 0xb2, 0xb5, 0xbc, 0xbb,
    0x96, 0x91, 0x98, 0x9f, 0x8a, 0x8D, 0x84, 0x83,
    0xde, 0xd9, 0xd0, 0xd7, 0xc2, 0xc5, 0xcc, 0xcb,
    0xe6, 0xe1, 0xe8, 0xef, 0xfa, 0xfd, 0xf4, 0xf3
};

#define proccrc8(u8CRC, u8Data) (u8CRC8Table[u8CRC ^ u8Data])

void serial_task(void const*)
{
    USB400Serial serial;
    int i;
    int dataLength;
    int optionalLength;
    uint8_t c;
    uint8_t crc;
    int sensor = 0;
    int humidity = 0;
    int temperature = 0;

    while(1) {

        while(!serial.connect())
            Thread::wait(500);

        while (1) {

            if (!serial.connected())
                break;

            if (serial.available()) {
                c = serial.getc();

                if (c == 0x55) {
                    crc = 0;

                    c = serial.getc();
                    crc = proccrc8(crc, c);
                    dataLength = c;

                    c = serial.getc();
                    crc = proccrc8(crc, c);
                    dataLength = (dataLength << 8) | c;

                    c = serial.getc();
                    crc = proccrc8(crc, c);
                    optionalLength = c;

                    c = serial.getc();
                    crc = proccrc8(crc, c); // packet type

                    c = serial.getc();
                    crc = proccrc8(crc, c); // CRC

                    if (crc == 0) {
                        crc = 0;

                        for (i = 0; i < dataLength; i++) {
                            c = serial.getc();
                            crc = proccrc8(crc, c);

                            if (i == 4) {                           
                                // printf("Sensor: %02X ", c);
                                sensor = c;
                            }
                            //A5-04-01
                            if (i == 6) {
                                humidity = c;
                            }
                            if (i == 7) {
                                temperature = c;
                            }
                        }

                        // printf("hum:%3.1f%% temp:%2.2fC\r\n", humidity*0.4, temperature*0.16);

                        if (sensor == 0x34) {
                            lcd.locate(0,12);
                            lcd.printf("%02X Temp:%2.2f C Hum:%3.1f %%\r\n", sensor, temperature*0.16, humidity*0.4);
                        }

                        if (sensor == 0x52) {
                            lcd.locate(0,21);
                            lcd.printf("%02X Temp:%2.2f C Hum:%3.1f %%\r\n", sensor, temperature*0.16, humidity*0.4);
                        }

                        for (i = 0; i < optionalLength; i++) {
                            c = serial.getc();
                            crc = proccrc8(crc, c);
                        }

                        c = serial.getc();
                        crc = proccrc8(crc, c);

                    }
                }
            }
        }
    }
}

int main()
{
    lcd.cls();
    lcd.locate(0,3);
    lcd.printf("mbed application board!");
    
    Thread serialTask(serial_task, NULL, osPriorityNormal, 256 * 4);
    while(1) {
        led1 = !led1;
        Thread::wait(500);
    }
}