Revision 0:74a0756399ff, committed 2018-06-05

Comitter:

APS_Lab

Date:

Tue Jun 05 13:03:07 2018 +0000

Child:

1:d3aeaa02781d

Commit message:

I2C&??????ADT7420

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.gitignore	Tue Jun 05 13:03:07 2018 +0000
@@ -0,0 +1,4 @@
+.build
+.mbed
+projectfiles
+*.py*

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/README.md	Tue Jun 05 13:03:07 2018 +0000
@@ -0,0 +1,57 @@
+# Getting started with Blinky on mbed OS
+
+This guide reviews the steps required to get Blinky working on an mbed OS platform.
+
+Please install [mbed CLI](https://github.com/ARMmbed/mbed-cli#installing-mbed-cli).
+
+## Import the example application
+
+From the command-line, import the example:
+
+```
+mbed import mbed-os-example-blinky
+cd mbed-os-example-blinky
+```
+
+### Now compile
+
+Invoke `mbed compile`, and specify the name of your platform and your favorite toolchain (`GCC_ARM`, `ARM`, `IAR`). For example, for the ARM Compiler 5:
+
+```
+mbed compile -m K64F -t ARM
+```
+
+Your PC may take a few minutes to compile your code. At the end, you see the following result:
+
+```
+[snip]
++----------------------------+-------+-------+------+
+| Module                     | .text | .data | .bss |
++----------------------------+-------+-------+------+
+| Misc                       | 13939 |    24 | 1372 |
+| core/hal                   | 16993 |    96 |  296 |
+| core/rtos                  |  7384 |    92 | 4204 |
+| features/FEATURE_IPV4      |    80 |     0 |  176 |
+| frameworks/greentea-client |  1830 |    60 |   44 |
+| frameworks/utest           |  2392 |   512 |  292 |
+| Subtotals                  | 42618 |   784 | 6384 |
++----------------------------+-------+-------+------+
+Allocated Heap: unknown
+Allocated Stack: unknown
+Total Static RAM memory (data + bss): 7168 bytes
+Total RAM memory (data + bss + heap + stack): 7168 bytes
+Total Flash memory (text + data + misc): 43402 bytes
+Image: .\.build\K64F\ARM\mbed-os-example-blinky.bin
+```
+
+### Program your board
+
+1. Connect your mbed device to the computer over USB.
+1. Copy the binary file to the mbed device.
+1. Press the reset button to start the program.
+
+The LED on your platform turns on and off.
+
+## Troubleshooting
+
+If you have problems, you can review the [documentation](https://os.mbed.com/docs/latest/tutorials/debugging.html) for suggestions on what could be wrong and how to fix it.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Jun 05 13:03:07 2018 +0000
@@ -0,0 +1,97 @@
+#include "mbed.h"
+
+#define ADT7420 0x48
+
+#define RESET_REG 0x2F
+#define TEMP_REG 0x00
+#define ID_REG 0x0B
+
+
+DigitalOut led1(LED1);
+DigitalOut sensor(D8);
+
+I2C Myi2c(I2C_SDA, I2C_SCL);
+
+Serial pc(USBTX, USBRX);
+
+void ADT7420_reset(void);
+int ADT7420_GetID(void);
+int ADT7420_GetTemp(void);
+
+// main() runs in its own thread in the OS
+int main() {
+    float status;
+    int res;
+    sensor=1;
+    //configure for UART
+    pc.baud(115200);
+    pc.printf("I2C ADT7420 Demo\n");
+   
+    //configure for I2C @400KHz
+    Myi2c.frequency(100000);
+   
+    //configure for ADT7420
+    
+    pc.printf("[RESET ] ADT7420\n"); 
+    ADT7420_reset();
+    wait(0.5);
+
+    pc.printf("[CHECK ID] ADT7420\n"); 
+    ADT7420_GetID();
+
+    
+    while (true) {
+        led1 = 0;
+        
+        pc.printf("[Get Temp] ADT7420\n"); 
+        res = ADT7420_GetTemp();
+        
+        if(res & 0x1000)
+        {
+            status = (float)((res - 8192) / 16);
+        }
+        else
+        {
+            status = (float)(res / 16);
+        }
+        
+        pc.printf("Current Temp %.0f \n", status);
+            
+        wait(0.5);
+        led1 = 1;
+        wait(0.5);
+    }
+    
+}
+
+void ADT7420_reset(void)
+{
+    char cmd_reset[1];
+    cmd_reset[0] = RESET_REG;
+    Myi2c.write(ADT7420, cmd_reset, 1);
+}
+    
+int ADT7420_GetID(void)
+{
+    char cmd_id[1], read_val;
+    cmd_id[0]=ID_REG;
+    Myi2c.write(ADT7420, cmd_id, 1, 1);
+    Myi2c.read(ADT7420, &read_val, 1);
+    pc.printf("ID %02x\n", read_val);
+    return read_val;
+}
+
+int ADT7420_GetTemp(void)
+{
+    char cmd_temp[1], read_val[2];
+    int temp=0;
+    cmd_temp[0]=TEMP_REG;
+    Myi2c.write(ADT7420, cmd_temp, 1, 1);
+    Myi2c.read(ADT7420, read_val, 2);
+    pc.printf("Temp Upper %02x\n", read_val[0]);
+    pc.printf("Temp Lower %02x\n", read_val[1]);
+    
+    temp = (int)((read_val[0] << 8) | read_val[1]);
+    temp >>= 3;
+    return temp;
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Tue Jun 05 13:03:07 2018 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#c26126ee5951b70703989c844c4d0bc8f498049b