nz32s.cpp

00001 /**
00002  * File:      nz32s.cpp
00003  *
00004  * Author:    Modtronix Engineering - www.modtronix.com
00005  *
00006  * Description:
00007  *
00008  * Software License Agreement:
00009  * This software has been written or modified by Modtronix Engineering. The code
00010  * may be modified and can be used free of charge for commercial and non commercial
00011  * applications. If this is modified software, any license conditions from original
00012  * software also apply. Any redistribution must include reference to 'Modtronix
00013  * Engineering' and web link(www.modtronix.com) in the file header.
00014  *
00015  * THIS SOFTWARE IS PROVIDED IN AN 'AS IS' CONDITION. NO WARRANTIES, WHETHER EXPRESS,
00016  * IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
00017  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE
00018  * COMPANY SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
00019  * CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
00020  */
00021 #define THIS_IS_NZ32S_CPP
00022 
00023 #include "mbed.h"
00024 #include <stdarg.h>
00025 #include <stdio.h>
00026 
00027 #define DEBUG_ENABLE            1
00028 #include "mx_default_debug.h"
00029 
00030 //Includes that use debugging - Include AFTER debug defines/includes above! It uses them for debugging!
00031 #define DEBUG_ENABLE_NZ32S          0
00032 #define DEBUG_ENABLE_INFO_NZ32S     0
00033 #include "nz32s.h"
00034 
00035 
00036 // DEFINES ////////////////////////////////////////////////////////////////////
00037 
00038 
00039 // GLOBAL VARIABLES ///////////////////////////////////////////////////////////
00040 
00041 
00042 // STATIC OBJECTS /////////////////////////////////////////////////////////////
00043 DigitalOut NZ32S::led1(LED1);
00044 DigitalIn  NZ32S::btn1(USER_BUTTON, PullDown);
00045 #if (NZ32S_USE_WWDG==1)
00046 WWDG_HandleTypeDef NZ32S::hwwdg;    //Windowed Watchdog Timer, is stopped during low power mode
00047 #else
00048 IWDG_HandleTypeDef NZ32S::hiwdg;    //Independent Watchdog Timer, is NOT stopped during low power mode!
00049 #endif
00050 #if (NZ32S_USE_A13_A14 == 1)
00051 DigitalInOut NZ32S::enableFastCharge(PA_14, PIN_INPUT, PullNone, 0);
00052 #endif
00053 
00054 
00055 // Function Prototypes ////////////////////////////////////////////////////////
00056 
00057 
00058 /** Constructor
00059  */
00060 NZ32S::NZ32S() {
00061     led1 = 0;   //User LED off
00062 }
00063 
00064 
00065 /** Get the battery voltage.
00066  */
00067 uint16_t NZ32S::get_batt_mv() {
00068     MX_DEBUG("\r\nnz32s_getBattMV()");
00069 
00070     //uint16_t getBattMV(void) {
00071     //    float fval = 0;
00072     //
00073     //#if (NZ32S_USE_A13_A14 == 1)
00074     ////    uint16_t meas;
00075     ////
00076     ////    //Measure Vbatt. It doesn't seem to make lots of a difference if we disable the DC/DC converter!
00077     ////    ctrVBatt = 0;
00078     ////    ctrVBatt.output();
00079     ////    wait_ms(150);
00080     ////    meas = ainVBatt.read_u16(); // Converts and read the analog input value
00081     ////    ctrVBatt.input();
00082     ////    //fval = ((float)meas / (float)0xffff) * 6600;  //6600 = 3300*2, because resistor divider = 2
00083     ////    fval = meas * ((float)6600.0 / (float)65535.0);
00084     //#endif
00085     //
00086     //    return (uint16_t) fval;
00087     return 0;
00088 }
00089 
00090 
00091 /**
00092  * Get Vusb or 5V supply voltage in millivolts.
00093  */
00094 uint16_t NZ32S::get_supply_mv(void) {
00095     //    float fval;
00096     //    uint16_t meas;
00097     //
00098     //    //Following voltages were measured at input of ADC:
00099     //    //
00100     //    //----- Vusb=0V  &  5V supply=0V -----
00101     //    //Value is typically 4mV
00102     //    //
00103     //    //----- Vusb=5V  &  5V supply=0V -----
00104     //    //When only VUSB is supplied, the value is typically 1.95V
00105     //    //
00106     //    //----- Vusb=0V  &  5V supply=5V -----
00107     //    //When only VUSB is supplied, the value is typically 1.95V
00108     //    //
00109     //    //The reason this circuit does not work, is because of the reverse voltage of the diodes. It is given
00110     //    //as about 40 to 80uA. With a resistor value of 470K, this will put 5V on other side of diode.
00111     //    //Thus, no matter if 5V is at Vusb, Vsupply, or both, the read value will always be 1.95V.
00112     //    //To solve problem, resistors must be lowered to value where 80uA will no longer give more than 5V
00113     //    //voltage drop = 62k. Using two 47k resistors should work.
00114     //
00115     //    //Measure Vusb/5V sense input
00116     //    meas = ainVSense.read_u16(); // Converts and read the analog input value
00117     //    fval = ((float) meas / (float) 0xffff) * 3300;
00118     //
00119     //    return (uint16_t) fval;
00120     return 0;
00121 }
00122 
00123 
00124 /**
00125  * Reset I2C bus
00126  */
00127 void NZ32S::i2c_reset(uint8_t busNumber, PinName sda, PinName scl) {
00128 #if defined(STM32) || defined(STM32L1)
00129     i2c_t objI2C;
00130 
00131     if (busNumber == 1) {
00132         objI2C.i2c = I2C_1;
00133     }
00134     else if (busNumber == 2) {
00135         objI2C.i2c = I2C_2;
00136     }
00137 
00138     objI2C.slave = 0;
00139     i2c_init(&objI2C, sda, scl);
00140     //i2c_reset(&objI2C);       //i2c_init() above calls i2c_reset()
00141     //pc.printf("\r\nI2C1 Reset");
00142 
00143     MX_DEBUG("\r\nI2C1 Reset");
00144 
00145 #endif  //#if defined(STM32) || defined(STM32L1)
00146 }
00147 
00148 void NZ32S::print_reset_cause(bool clearFlags) {
00149 #if defined(STM32) || defined(STM32L1)
00150     if ( __HAL_RCC_GET_FLAG(PWR_FLAG_SB))
00151         MX_DEBUG("\r\nSystem resumed from STANDBY mode");
00152 
00153     if ( __HAL_RCC_GET_FLAG(RCC_FLAG_SFTRST))
00154         MX_DEBUG("\r\nSoftware Reset");
00155 
00156     if ( __HAL_RCC_GET_FLAG(RCC_FLAG_PORRST))
00157         MX_DEBUG("\r\nPower-On-Reset");
00158 
00159     if ( __HAL_RCC_GET_FLAG(RCC_FLAG_PINRST)) // Always set, test other cases first
00160         MX_DEBUG("\r\nExternal Pin Reset");
00161 
00162     if ( __HAL_RCC_GET_FLAG(RCC_FLAG_IWDGRST) != RESET)
00163         MX_DEBUG("\r\nWatchdog Reset");
00164 
00165     if ( __HAL_RCC_GET_FLAG(RCC_FLAG_WWDGRST) != RESET)
00166         MX_DEBUG("\r\nWindow Watchdog Reset");
00167 
00168     if ( __HAL_RCC_GET_FLAG(RCC_FLAG_LPWRRST) != RESET)
00169         MX_DEBUG("\r\nLow Power Reset");
00170 
00171 //    if ( __HAL_RCC_GET_FLAG(RCC_FLAG_BORRST) != RESET) // F4 Usually set with POR
00172 //        MX_DEBUG("\r\nBrown-Out Reset");
00173 
00174     if (clearFlags) {
00175         __HAL_RCC_CLEAR_RESET_FLAGS(); // The flags cleared after use
00176     }
00177 #endif  //#if defined(STM32) || defined(STM32L1)
00178 }
00179