MAX77801 Demo. The MAX77801 is a high-current, high-efficiency buck-boost regulator and features I2C-compatible, 2-wire serial interface consisting of a bidirectional serial-data line (SDA) and a serial-clock line (SCL). Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX77801.pdf Tested using MAX32630FTHR. This Demo simply provides the test interface via USB Serial port.

Dependencies:   USBDevice max32630fthr max77801 mbed

Fork of MAX77801_Demo by Daniel Geonsi Jeong

main.cpp

Committer:
daniel_gs_jeong
Date:
2017-11-21
Revision:
0:c1437a5e420b

File content as of revision 0:c1437a5e420b:

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* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
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* The mere transfer of this software does not imply any licenses
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**********************************************************************/


#include "mbed.h"
#include "max77801.h"
#include "USBSerial.h"

// Virtual serial port over USB
USBSerial microUSB; 

int main()
{
    int c;    
    int32_t rData;
    double vout_l = 3.3000;
    double vout_h = 3.7500;
    
    DigitalOut rLED(LED1, LED_OFF);
    DigitalOut gLED(LED2, LED_OFF);
    DigitalOut bLED(LED3, LED_OFF);
    
    I2C i2cBus(P5_7, P6_0);
    i2cBus.frequency(400000);
    
    MAX77801 max77801(&i2cBus);
    wait_ms(100);    
    
    rData = max77801.init();
    if(rData<0)
    {
        microUSB.printf("MAX77801 Fail to Init. Stopped\r\n");        
        rLED = true;
    }
    else
    {
        microUSB.printf("MAX77801 Init Done\r\n");
    }
  
    while(1)
    {        
        gLED = true;rLED = false;
        microUSB.printf("----- [ MAX77801 DEMO ] Usage -----  \r\n");  
        microUSB.printf("i : Set Registers to POR Staus \r\n");  
        microUSB.printf("+ : Increase VOUT L&H \r\n");  
        microUSB.printf("- : Dncrease VOUT L&H \r\n");  
        microUSB.printf("s : Read Status Registser \r\n");  
        microUSB.printf("e : Enable Buck Boost \r\n");  
        microUSB.printf("d : Disable Buck Boost \r\n"); 
        microUSB.printf("\r\nInput >> ");  
        
        c = microUSB.getc();
        
        gLED = false;rLED = true;
        switch(c)
        {
            // ReInit
            case 'i': 
                microUSB.printf("Init to POR Status\r\n");   
                //Set to POR Status
                max77801.init();
                vout_l = 3.3000;
                rData = max77801.write_register(MAX77801::REG_VOUT_DVS_L, 0x38);
                if(rData < 0)                    
                    microUSB.printf("Error: to access data\r\n");  
                vout_h = 3.7500; //WLP
                rData = max77801.write_register(MAX77801::REG_VOUT_DVS_H, 0x40);
                if(rData < 0)                    
                    microUSB.printf("Error: to access data\r\n"); 
            break;
            
            //Control VOUT
            case '+':
                microUSB.printf("Increase VOUT\r\n");   
                vout_l += 0.0125;
                rData = max77801.set_vout(vout_l, MAX77801::VAL_LOW); 
                if(rData < 0)                    
                    microUSB.printf("Error: to access data\r\n");  
                vout_h += 0.0125;
                rData = max77801.set_vout(vout_h, MAX77801::VAL_HIGH);
                if(rData < 0)                    
                    microUSB.printf("Error: to access data\r\n");                  
            break;
            
            case '-':
                microUSB.printf("Decrease VOUT\r\n");    
                vout_l -= 0.0125;
                rData = max77801.set_vout(vout_l, MAX77801::VAL_LOW); 
                if(rData < 0)                    
                    microUSB.printf("Error: to access data\r\n");  
                vout_h -= 0.0125;
                rData = max77801.set_vout(vout_h, MAX77801::VAL_HIGH);
                if(rData < 0)                    
                    microUSB.printf("Error: to access data\r\n");                  
            break;
            
            //Read Status Register
            case 's':
                microUSB.printf("Read Status\r\n");  
                rData = max77801.get_status(); 
                if(rData < 0)                    
                    microUSB.printf("Error: to access data\r\n");  
                else                
                    microUSB.printf("Status 0x%2X\r\n",rData); 
            break;
            
            //Buck Boost Enable/Disable            
            case 'e':
                microUSB.printf("Enable Buck Boost\r\n");  
                rData = max77801.config_enable(MAX77801::BUCK_BOOST_OUTPUT, 
                                               MAX77801::VAL_ENABLE); 
                if(rData < 0)                    
                    microUSB.printf("Error: to access data\r\n");  
            break;
            
            case 'd':
                microUSB.printf("Disable Buck Boost\r\n");  
                rData = max77801.config_enable(MAX77801::BUCK_BOOST_OUTPUT, 
                                               MAX77801::VAL_DISABLE); 
                if(rData < 0)                    
                    microUSB.printf("Error: to access data\r\n");  
            break;
            
            
            default:                
                microUSB.printf("Unknown Command\r\n");
            break;            
        }
        
        wait_ms(1000);
    }
}