Diff: main.cpp

Revision:

0:d488d550469e

Child:

1:1e577b8befeb

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun May 11 07:39:13 2014 +0000
@@ -0,0 +1,121 @@
+#include "mbed.h"
+
+DigitalInOut PDIO(p30);
+DigitalOut CSn(p21);
+Serial pc(USBTX, USBRX);
+
+int read_temperature(I2C i2c, int addr, float *temperature)
+{
+    char data[5];
+    int status = i2c.read(addr, data, 5);
+    *temperature = data[4]*0.667-75;
+    return status;
+}
+
+void OTP_setup()
+{
+    DigitalOut CLK(p27);
+    PDIO.output();
+    PDIO = 1;
+    CLK = 0;
+    CSn = 0;
+    wait_ms(1);
+    CSn = 1;
+    wait_us(30);
+    CSn = 0;
+    wait_us(30);
+    CLK = 1;
+    wait_us(30);
+    CLK = 0;
+    wait_us(30);
+}
+
+void OTP_exit()
+{
+    DigitalOut CLK(p27);
+    CLK = 0;
+    CSn = 0;
+    PDIO = 1;
+    wait_us(30);
+    CLK = 1;
+    wait_us(30);
+    CLK = 0;
+    wait_us(30);
+    CLK = 1;
+    wait_us(30);
+    CSn = 1;
+    wait_us(30);
+    
+}
+
+void OTP_read(char *data, int length)
+{
+    DigitalOut CLK(p27);
+    CLK = 1;
+    PDIO = 0;
+    wait_us(30);
+    CSn = 1;
+    wait_us(30);
+    CLK = 0;
+    wait_us(30);
+    
+    //generate two CLK pulses
+    for(int i=0; i<2; i++)
+    {
+        CLK = 1;
+        wait_us(30);
+        CLK = 0;
+        wait_us(15);
+        
+        //switch PDIO to input on first faling edge of CLK
+        if(i==0)
+            PDIO.input();
+        wait_us(15);
+    }
+    
+    uint32_t factory_section = 0;
+    uint8_t I2C_A = 0; //I2C address <5:1>
+    uint8_t CCW = 0; //change increasing/decreasing code with encoder movement
+    uint16_t Z = 0; //zero position
+    
+    //read all parameters
+    read_bits(&factory_section, 29);
+    read_bits(&I2C_A, 5);
+    read_bits(&CCW, 1);
+    read_bits(&Z, 12);
+}
+
+int scan_NSE5310()
+{
+    CSn = 0;
+    I2C i2c(p28, p27);
+    int device_count = 0;
+    for(int addr=0x80; addr<0xFE; addr+=2)
+    {
+        float temperature;
+        //pc.printf("addr:0x%02X\n", addr);
+        if(read_temperature(i2c, addr, &temperature)==0)
+        {
+            pc.printf("Found device: 0x%02X, Temperature: %2.1fC\n", addr, temperature);
+            device_count++;
+        }
+    }
+    return device_count;
+}
+
+int main() {
+    pc.baud(115200);
+    pc.printf("Scanning for NSE5310 devices...\n");
+    int device_count = scan_NSE5310();
+    //pc.printf("device_count=%d\n", device_count);
+    if(device_count==0)
+        pc.printf("No device found. Completed.\n");
+    else if(device_count>1)
+        pc.printf("Found more than one device. Completed.\n");
+    else if(device_count==1)
+    {
+        pc.printf("Entering programming mode...\n");
+        OTP_setup();
+    }
+    while(1);
+}