Added Step-up control pin.

Two user function are added in the core.
At the SME initialization the step-up is shutdown.

Author: Mik

hardware/AMEL/samd/variants/AMEL_SmartEverything/variant.cpp

@@ -225,14 +225,26 @@ const PinDescription g_APinDescription[]=
 
 /*
  * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
- * |            | I/O Exte         |        |                 |
+ * |            | I/O Extension    |        |                 |
  * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
  * | 48         | IO_EXT_RST       |  PA13  |                 | EXTINT[13] SERCOM2/ PAD[1] SERCOM4/ PAD[1] TCC2/WO[1] TCC0/ WO[7] AC/CMP[1]
- * | 49         | IO_EXT_INT       |  PB06  |                 |EXTINT[6] AIN[14] Y[12]
+ * | 49         | IO_EXT_INT       |  PB06  |                 | EXTINT[6] AIN[14] Y[12]
  * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
  */
   { PORTA, 13, PIO_PWM, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM), No_ADC_Channel, PWM2_CH1, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // TCC2/WO[1]
   { PORTB, 06, PIO_ANALOG, PIN_ATTR_ANALOG, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_6 }, // ADC/AIN[14]
+      
+/*
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * |            | Step-up PWR      |        |                 |
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | 50         | EXT_PWR          |  PB04  |                 | EXTINT[4] AIN[12] Y[10]
+ * | 51         | REG_ON           |  PB05  |                 | EXTINT[5] AIN[13] Y[11]
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ */      
+  { PORTB,  4, PIO_INPUT, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_4},  // used as input only
+//{ PORTB,  4, PIO_INPUT_PULLUP, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // ADC/AIN[0]
+  { PORTB,  5, PIO_OUTPUT, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_5 }, // used as output only
 } ;
 
 
@@ -330,3 +342,17 @@ int button1IsPressed(void) {
 int button2IsPressed(void) {
     return !digitalRead(PIN_SME_BUTTON2);
 }
+
+
+bool isOnBattery(void) {   
+    return !digitalRead(PIN_EXT_PWR);
+}
+
+
+void setStepUp(uint32_t on) {
+    if (on) {
+        digitalWrite(PIN_REG_ON, HIGH);
+        } else {
+        digitalWrite(PIN_REG_ON, LOW);
+    }
+}

hardware/AMEL/samd/variants/AMEL_SmartEverything/variant.h

@@ -35,6 +35,7 @@
  *----------------------------------------------------------------------------*/
 
 #include "WVariant.h"
+#include <stdbool.h>
 
 #ifdef __cplusplus
 #include "SERCOM.h"
@@ -93,7 +94,11 @@ extern "C"
 #define PIN_IO_EXT_INT      (49u)
 
 
-// I/O Extender
+// Step-Up Power
+#define PIN_EXT_PWR         (50u)
+#define PIN_REG_ON          (51u)
+
+// User Button
 #define PIN_SME_BUTTON1        (41u)
 #define PIN_SME_BUTTON2        (42u)
 
@@ -180,12 +185,14 @@ static const uint8_t SCK  = PIN_SPI_SCK ;
 /*
     RGB wrapper function
     These functions has been created for a more comfortable use 
-      because internally wrap the inversion of the HIGH, LOW meaning
-
-    Using these function it remain the same Arduino User Experience to light a led
-    HIGH = Light ON
-    LOW  = Light OFF
-
+      because internally wrap the inversion of the HIGH, LOW meaning.
+    Using these function it remain the same Arduino User Experience to light a led.
+
+    parameter:
+    value = the light intensity. It could be 
+            HIGH   = light to the maximum level
+            LOW    = switch off the Led
+            1..255 = pwm value for different level of light
  */
 void ledGreenLight(uint32_t value);
 void ledRedLight(uint32_t value);
@@ -214,6 +221,25 @@ void ledYellowTwoLight(uint32_t value);
 int button1IsPressed(void);
 int button2IsPressed(void);
 
+
+/*
+    Enable/Disable the StepUp
+    
+    param:
+    true = Step-up the Battery Power
+    false= Do not Step-up the Battery Power
+*/
+void setStepUp(uint32_t on);
+
+/*
+    Return the information if the StepUp is enabled
+    
+    return:
+    true= the StepUp is running
+    false = the Sme is not under StepUp Power
+*/
+bool isOnBattery(void);
+
 #ifdef __cplusplus
 }
 #endif

hardware/AMEL/samd/variants/AMEL_SmartEverything/variantInit.cpp

@@ -15,10 +15,9 @@ See the GNU Lesser General Public License for more details.
 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
-*/
+ */
 
 #include <Arduino.h>
-//#include "../../../../arduino/samd/libraries/Wire/Wire.h"
 #include "WireIoExt.h"
 
 static const uint32_t TWI_CLOCK_SME = 100000;
@@ -95,15 +94,15 @@ static bool writeRegister(byte _address, byte regToWrite, byte dataToWrite)
     return (errorNo == 0);
 }
 
- uint8_t resetsDbg[2];
- uint8_t actual[2];
- 
- uint8_t smeInitError=0xFF;
+uint8_t resetsDbg[2];
+uint8_t actual[2];
+
+uint8_t smeInitError=0xFF;
 static void ioExtenderInit(void) {
     WireTemp.begin();
 
 
-// first test the I2C bus
+    // first test the I2C bus
     uint8_t data = readRegister(HTS221_ADDRESS, WHO_AM_I);
     if (data == WHO_AM_I_RETURN){
         smeInitError = 0;
@@ -115,35 +114,35 @@ static void ioExtenderInit(void) {
         if (writeRegister( TCA6416A_ADDRESS, CONFIG_PORT_1, CONF_PORT_1)!=false){
             writeRegister( TCA6416A_ADDRESS, OUTPUT_PORT_1, INIT_P1); // keep the resets High
         }
-        
+
         // wait a while
         delay(20);
         resetsDbg[0]=0;
         resetsDbg[1]=0;
-        
-        
+
+
         actual[0] = readRegister( TCA6416A_ADDRESS, OUTPUT_PORT_0);
         writeRegister( TCA6416A_ADDRESS, OUTPUT_PORT_0, (actual[0]&~BLE_RESET_PIN));
         resetsDbg[0] = readRegister( TCA6416A_ADDRESS, OUTPUT_PORT_0);
-        
+
         if ((actual[1] = readRegister( TCA6416A_ADDRESS, OUTPUT_PORT_1)) != false) {
             writeRegister( TCA6416A_ADDRESS, OUTPUT_PORT_1, (actual[1]&(~GPS_RESET_PIN) &(~SFX_WAKEUP_PIN)));
             resetsDbg[1] = readRegister( TCA6416A_ADDRESS, OUTPUT_PORT_1);
         }
-        
+
         // wait a while
-        delay(20);
+            delay(20);
 
-        // move the reset high
-        writeRegister( TCA6416A_ADDRESS, OUTPUT_PORT_0, actual[0]);
-        resetsDbg[0] = readRegister( TCA6416A_ADDRESS, OUTPUT_PORT_0);
-        
-        writeRegister( TCA6416A_ADDRESS, OUTPUT_PORT_1, actual[1]);
-        resetsDbg[1] = readRegister( TCA6416A_ADDRESS, OUTPUT_PORT_1);
-        
-        } else {
-            
-            smeInitError = 1;
+            // move the reset high
+            writeRegister( TCA6416A_ADDRESS, OUTPUT_PORT_0, actual[0]);
+            resetsDbg[0] = readRegister( TCA6416A_ADDRESS, OUTPUT_PORT_0);
+
+            writeRegister( TCA6416A_ADDRESS, OUTPUT_PORT_1, actual[1]);
+            resetsDbg[1] = readRegister( TCA6416A_ADDRESS, OUTPUT_PORT_1);
+
+    } else {
+
+        smeInitError = 1;
     }
 
 }
@@ -164,17 +163,23 @@ void initVariant() {
     // initialize button1 & button2 as input
     pinMode(PIN_SME_BUTTON1, INPUT_PULLUP);
     pinMode(PIN_SME_BUTTON2, INPUT_PULLUP);
-    
-    
+
+
     // initialize RGB LED
     LED_GREEN_INIT;
     LED_RED_INIT;
     LED_BLUE_INIT;
     ledGreenLight(LOW);
     ledBlueLight(LOW);
     ledRedLight(LOW);
-        
-        
+
+    // initialize The EXT_PWR Pin as input
+    // it will be HIGH when the battery is connected
+    pinMode(PIN_EXT_PWR, INPUT);
+    // initialize the SetpUp to Disable
+    pinMode(PIN_REG_ON, OUTPUT);
+    setStepUp(LOW);
+
     // initialize the IO_Extender
     ioExtenderInit();
 }