Added IO_EXT register initialization and buttons definition

Author: fontamiHw

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

@@ -88,12 +88,16 @@ extern "C"
 #define PIN_LED3             PIN_LED_TXL
 #define LED_BUILTIN          PIN_LED_13
 
-
-
 // I/O Extender
 #define PIN_IO_EXT_RST      (48u)
 #define PIN_IO_EXT_INT      (49u)
 
+
+// I/O Extender
+#define PIN_SME_BUTTON1        (41u)
+#define PIN_SME_BUTTON2        (42u)
+
+
 /*
  * Analog pins
  */
@@ -173,6 +177,7 @@ static const uint8_t SCK  = PIN_SPI_SCK ;
 #define PIN_USB_DM           (29ul)
 #define PIN_USB_DP           (30ul)
 
+
 #ifdef __cplusplus
 }
 #endif
@@ -181,6 +186,7 @@ static const uint8_t SCK  = PIN_SPI_SCK ;
  *        Arduino objects - C++ only
  *----------------------------------------------------------------------------*/
 
+
 #ifdef __cplusplus
 
 /*	=========================
@@ -223,5 +229,7 @@ extern Uart SigFox;
 #define SERIAL_PORT_HARDWARE        Serial1
 #define SERIAL_PORT_HARDWARE_OPEN   Serial1
 
+                             
+extern uint8_t smeInitError;
 #endif /* _VARIANT_AMEL_SMARTEVERYTHING_ */
 

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

@@ -16,13 +16,147 @@ 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;
+
+#define HTS221_ADDRESS     0x5F
+//Define a few of the registers that we will be accessing on the HTS221
+#define WHO_AM_I           0x0F
+#define WHO_AM_I_RETURN    0xBC //This read-only register contains the device identifier, set to BCh
+
+
+#define TCA6416A_ADDRESS 0x20
+#define CONF_PORT_0     0b01111111
+#define INIT_P0         0b10000000
+
+#define CONF_PORT_1     0b00110101
+#define INIT_P1         0b11001010
+#define VALUE_GPS_FORCE_ON   0b10001010
+
+// Protocol          PowerOn Default
+#define INPUT_PORT_0    0x00 //Read byte          xxxx xxxx (undefined)
+#define INPUT_PORT_1    0x01 //Read byte          xxxx xxxx
+#define OUTPUT_PORT_0   0x02 //Read/write byte    1111 1111
+#define OUTPUT_PORT_1   0x03 //Read/write byte    1111 1111
+#define P_INVERT_PORT_0 0x04 //Read/write byte    0000 0000
+#define P_INVERT_PORT_1 0x05 //Read/write byte    0000 0000
+#define CONFIG_PORT_0   0x06 //Read/write byte    1111 1111
+#define CONFIG_PORT_1   0x07 //Read/write byte    1111 1111
+
+
+#define _9AX_INT2_A_G_PIN   0x1
+#define _9AX_INT1_A_G_PIN   0x2
+#define _9AX_INT_M_PIN      0x4
+#define _9AX_DRDY_M_PIN     0x8
+#define PRE_INT_PIN         0x10
+#define ALS_GPIO0_PIN       0x20
+#define ALS_GPIO1_PIN       0x40
+#define BLE_RESET_PIN       0x80
+
+#define SFX_STDBY_STS_PIN   0x1
+#define SFX_RESET_PIN       0x2
+#define SFX_RADIO_STS_PIN   0x4
+#define SFX_WAKEUP_PIN      0x8
+#define NFC_FD_PIN         0x10
+#define HUT_DRDY_PIN        0x20
+#define GPS_FORCE_ON_PIN    0x40
+#define GPS_RESET_PIN       0x80
+
+
+static byte readRegister(byte _address, byte regToRead)
+{
+    WireTemp.beginTransmission(_address);
+    WireTemp.write(regToRead);
+    WireTemp.endTransmission(false); //endTransmission but keep the connection active
+
+    WireTemp.requestFrom(_address, 1); //Ask for 1 byte, once done, bus is released by default
+
+    while(!WireTemp.available()) ; //Wait for the data to come back
+    return WireTemp.read(); //Return this one byte
+}
+
+// Writes a single byte (dataToWrite) into regToWrite
+static bool writeRegister(byte _address, byte regToWrite, byte dataToWrite)
+{
+    WireTemp.beginTransmission(_address);
+
+    if (!WireTemp.write(regToWrite)) {
+        return false;
+    }
+    if (!WireTemp.write(dataToWrite)) {
+        return false;
+    }
+
+    uint8_t errorNo = WireTemp.endTransmission(); //Stop transmitting
+    return (errorNo == 0);
+}
+
+ uint8_t resetsDbg[2];
+ uint8_t actual[2];
+ 
+ uint8_t smeInitError=0xFF;
+static void ioExtenderInit(void) {
+    WireTemp.begin();
+
+
+// first test the I2C bus
+    uint8_t data = readRegister(HTS221_ADDRESS, WHO_AM_I);
+    if (data == WHO_AM_I_RETURN){
+        smeInitError = 0;
+
+        if (writeRegister( TCA6416A_ADDRESS, CONFIG_PORT_0, CONF_PORT_0)!=false) {
+            writeRegister( TCA6416A_ADDRESS, OUTPUT_PORT_0, INIT_P0); // keep the BLE reset High
+        }
+
+        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);
+
+        // 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;
+    }
+
+}
+
 
 void initVariant() {
     // reset the I/O Extender
     pinMode(PIN_IO_EXT_RST, OUTPUT);
     digitalWrite(PIN_IO_EXT_RST, LOW);
     delay(10); // just wait a while
-    digitalWrite(PIN_IO_EXT_RST, HIGH);       
-}
+    digitalWrite(PIN_IO_EXT_RST, HIGH);
 
+        
+    // initialize the IO_Extender
+    ioExtenderInit();
+}