Diff: PCA9955A/PCA9955A.cpp

Revision:

0:a624e2eeccac

Child:

6:1c6e1af61981

diff -r 000000000000 -r a624e2eeccac PCA9955A/PCA9955A.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCA9955A/PCA9955A.cpp	Wed Feb 25 06:42:41 2015 +0000
@@ -0,0 +1,251 @@
+#include    "mbed.h"
+#include    "PCA9955A.h"
+
+PCA9955A::PCA9955A( PinName i2c_sda, PinName i2c_scl, char i2c_address )
+    : PCA995xA( i2c_sda, i2c_scl, i2c_address ), n_of_ports( 16 )
+{
+    initialize();
+}
+
+PCA9955A::PCA9955A( I2C &i2c_obj, char i2c_address )
+    : PCA995xA( i2c_obj, i2c_address ), n_of_ports( 16 )
+{
+    initialize();
+}
+
+PCA9955A::~PCA9955A()
+{
+}
+
+void PCA9955A::initialize( void )
+{
+    char init_array[] = {
+        PCA995xA::AUTO_INCREMENT | REGISTER_START,  //  Command
+        0x00, 0x00,                                 //  MODE1, MODE2
+        0xAA, 0xAA, 0xAA, 0xAA,                     //  LEDOUT[3:0]
+        0x80, 0x00,                                 //  GRPPWM, GRPFREQ
+    };
+
+    pwm( ALLPORTS, 0.0 );    
+    current( ALLPORTS, 0.1 );    
+
+    write( init_array, sizeof( init_array ) );
+    gradation_group_clear();
+}
+
+char PCA9955A::pwm_register_access( int port )
+{
+    if ( port < n_of_ports )
+        return ( PWM_REGISTER_START + port );
+
+    return ( PWMALL );
+}
+
+char PCA9955A::current_register_access( int port )
+{
+    if ( port < n_of_ports )
+        return ( IREF_REGISTER_START + port );
+
+    return ( IREFALL );
+}
+
+int PCA9955A::number_of_ports( void )
+{
+    return ( n_of_ports );
+}
+
+
+char  PCA9955A::gradation_group[ 16 ] = { 0xFF };
+
+void PCA9955A::gradation_setting( int group, char ramp_rate, char step_time, char hold_cntl, char iref )
+{
+    char    data[ 5 ]   = { (RAMP_RATE_GRP0 + (group * GRAD_GROUP_OFFSET)) | AUTO_INCREMENT,
+                            ramp_rate,
+                            step_time,
+                            hold_cntl,
+                            iref
+                          };
+
+    write( data, sizeof( data ) );
+}
+
+void PCA9955A::gradation_start( char group, char continuous_flag )
+{
+    static char v[]   = { GRAD_CNTL, 0 };
+
+    v[ 1 ]  = read( GRAD_CNTL ) | ((0x02 | continuous_flag) << (group * 2));
+//    v[ 1 ]  = ((0x02 | continuous_flag) << (group * 2));
+    write( v, sizeof( v ) );
+}
+
+void PCA9955A::gradation_stop( void )
+{
+    char    v[]   = { GRAD_CNTL, 0 };
+
+    write( v, sizeof( v ) );
+}
+
+void PCA9955A::group_selector( short g0, short g1, short g2, short g3 )
+{
+    unsigned int    pattern = 0x00000000;
+    short           src[ 4 ];
+    short           port_select;
+    char            v[ 7 ];
+    int             i;
+    int             grp;
+
+    v[ 0 ]  = GRAD_MODE_SEL0 | AUTO_INCREMENT;
+
+    port_select = g0 | g1 | g2 | g3;
+    v[ 1 ]  = (port_select >> 0) & 0xFF;
+    v[ 2 ]  = (port_select >> 8) & 0xFF;
+
+    if ( 0x0000 == port_select ) {
+        write( v, 3 );
+        return;
+    }
+
+    src[ 0 ]    = g0;
+    src[ 1 ]    = g1;
+    src[ 2 ]    = g2;
+    src[ 3 ]    = g3;
+
+    for ( i = 0; i < 16; i++ ) {
+        for ( grp = 0; grp < 4; grp++ ) {
+            if ( src[ grp ] & (0x1 << i) )
+                pattern |= grp << (i * 2);
+        }
+    }
+
+    for ( i = 0; i < 4; i++ )
+        v[ i + 3 ]  = 0xFF & (pattern >>  (i * 8));
+
+    write( v, sizeof( v ) );
+}
+
+void PCA9955A::gradation_group_setting( char group, char port )
+{
+    short   g[ 4 ]  = { 0x0000 };
+
+    port    &= 0xF;
+    gradation_group[ port ] = (group < 4) ? group : NOGROUP;
+
+    for ( int i = 0; i < 16; i++ ) {
+        if ( gradation_group[ i ] != NOGROUP )
+            g[ gradation_group[ i ] ]  |= 0x0001 << i;
+    }
+
+    group_selector( g[ 0 ], g[ 1 ], g[ 2 ], g[ 3 ] );
+//    pwm( port, 1.0 );
+    pwm( port, 0.3 );
+}
+
+void PCA9955A::gradation_group_clear( void )
+{
+    for ( int i = 0; i < 16; i++ ) {
+        gradation_group[ i ] = NOGROUP;
+    }
+
+    group_selector( 0, 0, 0, 0 );
+}
+
+float PCA9955A::gradation_ramp_setting( char group, float cycle, char flag_on, char flag_off, int ramp_flag )
+{
+    int     ramp_time;
+    char    prescaler;
+    int     required_steps;
+    char    mult_factor;
+    char    iref_inc;
+    int     iref        = 255;
+
+#define     RAMP_RATE_GRP   1
+#define     STEP_TIME_GRP   2
+#define     HOLD_CNTL_GRP   3
+#define     IREF_GRP        4
+
+    char    regs[ 5 ];
+
+    float hold_time[]   = {
+        0.00,
+        0.25,
+        0.50,
+        0.75,
+        1.00,
+        2.00,
+        4.00,
+        6.00
+    };
+
+
+    if ( ramp_flag == NO_RAMP ) {
+        iref_inc        = 1;
+        ramp_time       = 0;
+        prescaler       = 0;
+        required_steps  = 0;
+        mult_factor     = 0;
+    } else {
+        ramp_time   = (int)((cycle - (hold_time[ flag_on ] + hold_time[ flag_off ])) / ((ramp_flag == RAMP_UP_DOWN) ? 2.0 : 1.0) * 1000);
+
+        prescaler       = ( ramp_time <= 32 * (iref + 1)) ? 0 : 1;
+
+        if ( prescaler )
+            required_steps  = ramp_time / 8;
+        else
+            required_steps  = ramp_time * 2;
+
+        if ( iref < required_steps ) {
+            iref_inc    = 1;
+            mult_factor = required_steps / (iref + 1);
+            mult_factor = (mult_factor <= 0) ?  1 : mult_factor;
+            mult_factor = (64 < mult_factor) ? 64 : mult_factor;
+        } else {
+            iref_inc    = (iref + 1) / required_steps;
+            iref_inc    = (iref_inc <= 0) ?  1 : iref_inc;
+            iref_inc    = (64 < iref_inc) ? 64 : iref_inc;
+            mult_factor = 1;
+        }
+    }
+
+//    printf( "ramp_time=%d, required_steps=%d, iref=%d\r\n", ramp_time, required_steps, iref );
+//    printf( "prescaler = %d, mult_factor=%d, iref_inc=%d\r\n", prescaler, mult_factor, iref_inc );
+//    printf( "\r\n" );
+
+    regs[ 0             ]   = 0x80 | (RAMP_RATE_GRP0 + (group * 4));
+    regs[ RAMP_RATE_GRP ]   = (ramp_flag << 6) | (iref_inc - 1);
+    regs[ STEP_TIME_GRP ]   = (prescaler << 6) | (mult_factor - 1);
+    regs[ HOLD_CNTL_GRP ]   = 0xC0 | (flag_on << 3) | flag_off;
+    regs[ IREF_GRP      ]   = iref;
+
+    write( regs, sizeof( regs ) );
+    
+#if 0
+    float   n_of_steps;
+    float   single_ramp_time;
+    float   total_ramp_time;
+    
+    n_of_steps          = (float)(((iref + 1) / iref_inc) * mult_factor);
+    single_ramp_time    = n_of_steps * (prescaler ? 8.0 : 0.5);
+    total_ramp_time     = single_ramp_time * ((ramp_flag == RAMP_UP_DOWN) ? 2.0 : 1.0);
+    printf( "n_of_steps = %f, single_ramp_time=%f, total_ramp_time=%f\r\n", n_of_steps, single_ramp_time, total_ramp_time );
+    printf( "hold_time[ flag_on ] = %f, hold_time[ flag_off ]=%f\r\n", hold_time[ flag_on ], hold_time[ flag_off ] );
+#endif
+
+    return ( (((((float)(((iref + 1) / iref_inc) * mult_factor)) * (prescaler ? 8.0 : 0.5)) * ((ramp_flag == RAMP_UP_DOWN) ? 2.0 : 1.0)) ) * 0.001 + (hold_time[ flag_on ] + hold_time[ flag_off ]) );
+}
+
+
+void PCA9955A::dump_gradation_registers( void )
+{
+    char    data[ 23 ];
+
+    read( RAMP_RATE_GRP0, data, sizeof( data ) );
+
+    printf( "GRAD_MODE_SEL[1|0]     = 0x%02X%02X\r\n", data[ 17 ], data[ 16 ] );
+    printf( "GRAD_GRP_SEL[3|2|1|0]  = 0x%02X%02X%02X%02X\r\n", data[ 21 ], data[ 20 ], data[ 19 ], data[ 18 ] );
+    printf( "GRAD_CNTL      = 0x%02X\r\n", data[ 22 ] );
+    printf( "RAMP_RATE  =  0x%02X  0x%02X  0x%02X  0x%02X\r\n", data[ 0 ], data[ 4 ], data[ 8 ], data[ 12 ] );
+    printf( "STEP_TIME  =  0x%02X  0x%02X  0x%02X  0x%02X\r\n", data[ 1 ], data[ 5 ], data[ 9 ], data[ 13 ] );
+    printf( "HOLD_CNTL  =  0x%02X  0x%02X  0x%02X  0x%02X\r\n", data[ 2 ], data[ 6 ], data[ 10 ], data[ 14 ] );
+    printf( "IREF       =  0x%02X  0x%02X  0x%02X  0x%02X\r\n", data[ 3 ], data[ 7 ], data[ 11 ], data[ 15 ] );
+    printf( "\r\n" );
+}