Damien Frost / Mbed 2 deprecated IoT_Ex

Example program to create IoT devices for a local network, which connect to a local server.

Dependencies:   WebSocketClient WiflyInterface mbed messages

This code is used in the second part of my Internet of Things (IoT) blog post available here. The code is fairly simple, but its real value is in its reliability. I have worked hard to try to make the wireless connection as reliable, and as fast, as possible. There are a few lines of code that must be modified before it will work correctly, and those are described in the following Wiki pages.

It is designed to work with a Python WebSocket Server running on a PC, the source code of which is available here.

Once operating with the server, each microcontroller, or IoT device, will broadcast a counter and its internal temperature to your WebSocket Server.

Diff: source/ADC.cpp

Revision:
2:7abdaa5a9209
Parent:
1:4403f2ed1c1f
Child:
3:f20e114eb2ee
--- a/source/ADC.cpp	Tue Oct 04 13:19:19 2016 +0000
+++ b/source/ADC.cpp	Tue Oct 04 13:59:13 2016 +0000
@@ -29,38 +29,18 @@
     ADC1->CR2 = value;
     wait_us(100);
     
+    // Set the EOC flag at the end of every regular conversion:
+    ADC1->CR2 |= ADC_CR2_EOCS;
+    
     // Turn on the internal temperature sensor:
     ADC->CCR |= ADC_CCR_TSVREFE;
     
-    // *** Control Register 1: CR1 ***
-    value = 0;
-    // [8] Set the SCAN Mode bit, to convert all registers when trigered:
-    value |= ADC_CR1_SCAN;
-    // [5] Set the JEOCIE bit, to trigger an interrupt when conversion ends.
-    value |= ADC_CR1_JEOCIE;
-    // Set the register:
-    ADC1->CR1 = value;
-    
-    // *** Control Register 2: CR2 ***
-    value = 0;
-    // [21:20] Set to 1, External trigger of injected channels triggered by positive edge.
-    value |= ADC_CR2_JEXTEN_0;
-    // Select the TIM1 TRGO and the external trigger:
-    value |= ADC_CR2_JEXTSEL_0;
-    // Set the register:
-    ADC1->CR2 |= value;
-    
-    // *** ADC injected sequence register: JSQR ***
-    value = 0;
-    // [21:20] JL bits, set to 0 for 1 total conversions to take place
-    // 
-    // [19:15] Convert CH16 first:
-    value |= ADC_JSQR_JSQ1_4;
-    // Save the register:
-    ADC1->JSQR = value;
+    // Set the first (and only channel) to convert to CH16, the internal temperature sensor:
+    ADC1->SQR3 |= ADC_SQR3_SQ1_4;
     
     // Set the sample numbers (making this bigger samples more slowly):
-    ADC1->SMPR2 = ADC_SMPR2_SMP1_1 | ADC_SMPR2_SMP1_2;
+    ADC1->SMPR2 = ADC_SMPR1_SMP16_1 | ADC_SMPR1_SMP16_2; // Set for 144 ADC clock cycles
+    ADC1->SMPR2 = ADC_SMPR1_SMP18_1 | ADC_SMPR1_SMP18_2; // Set for 144 ADC clock cycles
     
     
     INFO("ADC configuration complete!");