PCA9955A and PCA9956A class library. The PCA9955A is a 16-channel and the PCA9956A is a 24-channel Fm+ I2C-bus 57mA/20V constant current LED driver. The PCA9955A has a extended feature which called "Gradation control".

Dependencies:   CompLedDvrCC

Dependents:   PCA9956A_Hello pca9956b_two_demoboards PCA9955A_Gradation_control PCA9955A_Gradation_control ... more

What is this?

Code for PCA9956A and PCA9955A.
24-channel and 16-channel constant current type LED driver component class.

Please refer to the component page for details

PCA9955B and PCA9956B are I²C-bus controlled 16-channel constant current LED driver optimized for dimming and blinking.

High-level API is available

A high-level API that can be used as the "PwmOut" of bed-SDK is available.
This API enables to make instances of each LED output pins and control PWM duty cycle by assignment.
Output current also controllable by API function.
For detail information, refer API document of LedPwmOutCC Class class which is included in PCA995xA class library.

#include "mbed.h"
#include "PCA9956A.h"

PCA9956A    led_cntlr( p28, p27, 0xC4 );  //  SDA, SCL, Slave_address(option)
LedPwmOutCC led( led_cntlr, L0 );

int main()
{
    while( 1 ) {
        for( float p = 0.0f; p < 1.0f; p += 0.1f ) {
            led     = p;
            wait( 0.1 );
        }
    }
}

About the chips

PCA9956A

The PCA9956A is an I2C-bus controlled 24-channel constant current LED driver optimized for dimming and blinking 57 mA LEDs. Each LED output has its own 8-bit resolution (256 steps) fixed frequency individual PWM controller that operates at 31.25 kHz with a duty cycle that is adjustable from 0 % to 99.6 % to allow the LED to be set to a specific brightness value.

Datasheet: http://www.nxp.com/documents/data_sheet/PCA9956A.pdf

PCA9955A

The PCA9955A is an I2C-bus controlled 16-channel constant current LED driver optimized for dimming and blinking 57 mA Red/Green/Blue/Amber (RGBA) LEDs in amusement products. Each LED output has its own 8-bit resolution (256 steps) fixed frequency individual PWM controller that operates at 31.25 kHz with a duty cycle that is adjustable from 0 % to 100 % to allow the LED to be set to a specific brightness value.

On addition to this, the PCA9955A has "Gradation control".
The gradation control is a new feature of PCA995xA series. After the register setting and start the control, the PCA9955A performs dimming cycles automatically without MCU intervention.

Datasheet: http://www.nxp.com/documents/data_sheet/PCA9955A.pdf

PCA9952 and PCA9955 (non-A version)

The PCA9955 and PCA9955 (no-A at end of the type number) is not supported by this component class.

PCA9955(non-A)

PCA9955A != PCA9955

PCA9955A is not software compatible to PCA9955(non-A version).
There are several differences between A and non-A versions.
Register mapping is one of the difference. Please make sure you are using PCA9955A.

How the API works?

When the instance is made, all set up for PWM operation are done automatically.
For the operation, user can control the LED brightness in two ways.

  • PWM
  • Current

PCA9955A and PCA9956A have internal 31.25kHz oscillator to generate internal PWM waveform. This signal switchs the output current ON and OFF. The class' function pwm() controls duty-cycle of this output.

Another control is current. Since the PCA9955A and PCA9956A are constant current type LED driver, those have internal current sources. The current source on each channels has independent control of output current. The class' function current() provides interface to current change.

API_and_output

Tips for the chips

PCA995xA family

This PCA995xA components library can be used for both PCA9955A(16-channel) and PCA9956A(24-channel).
If you are using both chips on the I2C bus, those can be operated like..

#include "mbed.h"
 
#include "PCA9955A.h"
#include "PCA9956A.h"

PCA9955A    led0( p28, p27, 0xC0 );    //  SDA, SCL, Slave_address=0xC0 (16-channel chip)
PCA9956A    led1( p28, p27, 0xC2 );    //  SDA, SCL, Slave_address=0xC2 (24-channel chip)
 
int main()
{
    led0.current( ALLPORTS, 1.0 ); //  Set all ports output current 100%
    led1.current( ALLPORTS, 1.0 ); //  Set all ports output current 100%

    led0.pwm( ....    //  PWM control for PCA9955A(16-channel chip)
    led1.pwm( ....    //  PWM control for PCA9956A(24-channel chip)
    ...

Other sample code

For PCA9955A : http://developer.mbed.org/users/nxp_ip/code/PCA9955A_Hello/
For PCA9956A : http://developer.mbed.org/users/nxp_ip/code/PCA9956A_Hello/
For Gradation control of PCA9955A http://developer.mbed.org/users/nxp_ip/code/PCA9955A_Gradation_control/

Committer:
nxp_ip
Date:
Wed Feb 25 06:42:41 2015 +0000
Revision:
0:a624e2eeccac
Child:
6:1c6e1af61981
Initial version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nxp_ip 0:a624e2eeccac 1 #include "mbed.h"
nxp_ip 0:a624e2eeccac 2 #include "PCA9955A.h"
nxp_ip 0:a624e2eeccac 3
nxp_ip 0:a624e2eeccac 4 PCA9955A::PCA9955A( PinName i2c_sda, PinName i2c_scl, char i2c_address )
nxp_ip 0:a624e2eeccac 5 : PCA995xA( i2c_sda, i2c_scl, i2c_address ), n_of_ports( 16 )
nxp_ip 0:a624e2eeccac 6 {
nxp_ip 0:a624e2eeccac 7 initialize();
nxp_ip 0:a624e2eeccac 8 }
nxp_ip 0:a624e2eeccac 9
nxp_ip 0:a624e2eeccac 10 PCA9955A::PCA9955A( I2C &i2c_obj, char i2c_address )
nxp_ip 0:a624e2eeccac 11 : PCA995xA( i2c_obj, i2c_address ), n_of_ports( 16 )
nxp_ip 0:a624e2eeccac 12 {
nxp_ip 0:a624e2eeccac 13 initialize();
nxp_ip 0:a624e2eeccac 14 }
nxp_ip 0:a624e2eeccac 15
nxp_ip 0:a624e2eeccac 16 PCA9955A::~PCA9955A()
nxp_ip 0:a624e2eeccac 17 {
nxp_ip 0:a624e2eeccac 18 }
nxp_ip 0:a624e2eeccac 19
nxp_ip 0:a624e2eeccac 20 void PCA9955A::initialize( void )
nxp_ip 0:a624e2eeccac 21 {
nxp_ip 0:a624e2eeccac 22 char init_array[] = {
nxp_ip 0:a624e2eeccac 23 PCA995xA::AUTO_INCREMENT | REGISTER_START, // Command
nxp_ip 0:a624e2eeccac 24 0x00, 0x00, // MODE1, MODE2
nxp_ip 0:a624e2eeccac 25 0xAA, 0xAA, 0xAA, 0xAA, // LEDOUT[3:0]
nxp_ip 0:a624e2eeccac 26 0x80, 0x00, // GRPPWM, GRPFREQ
nxp_ip 0:a624e2eeccac 27 };
nxp_ip 0:a624e2eeccac 28
nxp_ip 0:a624e2eeccac 29 pwm( ALLPORTS, 0.0 );
nxp_ip 0:a624e2eeccac 30 current( ALLPORTS, 0.1 );
nxp_ip 0:a624e2eeccac 31
nxp_ip 0:a624e2eeccac 32 write( init_array, sizeof( init_array ) );
nxp_ip 0:a624e2eeccac 33 gradation_group_clear();
nxp_ip 0:a624e2eeccac 34 }
nxp_ip 0:a624e2eeccac 35
nxp_ip 0:a624e2eeccac 36 char PCA9955A::pwm_register_access( int port )
nxp_ip 0:a624e2eeccac 37 {
nxp_ip 0:a624e2eeccac 38 if ( port < n_of_ports )
nxp_ip 0:a624e2eeccac 39 return ( PWM_REGISTER_START + port );
nxp_ip 0:a624e2eeccac 40
nxp_ip 0:a624e2eeccac 41 return ( PWMALL );
nxp_ip 0:a624e2eeccac 42 }
nxp_ip 0:a624e2eeccac 43
nxp_ip 0:a624e2eeccac 44 char PCA9955A::current_register_access( int port )
nxp_ip 0:a624e2eeccac 45 {
nxp_ip 0:a624e2eeccac 46 if ( port < n_of_ports )
nxp_ip 0:a624e2eeccac 47 return ( IREF_REGISTER_START + port );
nxp_ip 0:a624e2eeccac 48
nxp_ip 0:a624e2eeccac 49 return ( IREFALL );
nxp_ip 0:a624e2eeccac 50 }
nxp_ip 0:a624e2eeccac 51
nxp_ip 0:a624e2eeccac 52 int PCA9955A::number_of_ports( void )
nxp_ip 0:a624e2eeccac 53 {
nxp_ip 0:a624e2eeccac 54 return ( n_of_ports );
nxp_ip 0:a624e2eeccac 55 }
nxp_ip 0:a624e2eeccac 56
nxp_ip 0:a624e2eeccac 57
nxp_ip 0:a624e2eeccac 58 char PCA9955A::gradation_group[ 16 ] = { 0xFF };
nxp_ip 0:a624e2eeccac 59
nxp_ip 0:a624e2eeccac 60 void PCA9955A::gradation_setting( int group, char ramp_rate, char step_time, char hold_cntl, char iref )
nxp_ip 0:a624e2eeccac 61 {
nxp_ip 0:a624e2eeccac 62 char data[ 5 ] = { (RAMP_RATE_GRP0 + (group * GRAD_GROUP_OFFSET)) | AUTO_INCREMENT,
nxp_ip 0:a624e2eeccac 63 ramp_rate,
nxp_ip 0:a624e2eeccac 64 step_time,
nxp_ip 0:a624e2eeccac 65 hold_cntl,
nxp_ip 0:a624e2eeccac 66 iref
nxp_ip 0:a624e2eeccac 67 };
nxp_ip 0:a624e2eeccac 68
nxp_ip 0:a624e2eeccac 69 write( data, sizeof( data ) );
nxp_ip 0:a624e2eeccac 70 }
nxp_ip 0:a624e2eeccac 71
nxp_ip 0:a624e2eeccac 72 void PCA9955A::gradation_start( char group, char continuous_flag )
nxp_ip 0:a624e2eeccac 73 {
nxp_ip 0:a624e2eeccac 74 static char v[] = { GRAD_CNTL, 0 };
nxp_ip 0:a624e2eeccac 75
nxp_ip 0:a624e2eeccac 76 v[ 1 ] = read( GRAD_CNTL ) | ((0x02 | continuous_flag) << (group * 2));
nxp_ip 0:a624e2eeccac 77 // v[ 1 ] = ((0x02 | continuous_flag) << (group * 2));
nxp_ip 0:a624e2eeccac 78 write( v, sizeof( v ) );
nxp_ip 0:a624e2eeccac 79 }
nxp_ip 0:a624e2eeccac 80
nxp_ip 0:a624e2eeccac 81 void PCA9955A::gradation_stop( void )
nxp_ip 0:a624e2eeccac 82 {
nxp_ip 0:a624e2eeccac 83 char v[] = { GRAD_CNTL, 0 };
nxp_ip 0:a624e2eeccac 84
nxp_ip 0:a624e2eeccac 85 write( v, sizeof( v ) );
nxp_ip 0:a624e2eeccac 86 }
nxp_ip 0:a624e2eeccac 87
nxp_ip 0:a624e2eeccac 88 void PCA9955A::group_selector( short g0, short g1, short g2, short g3 )
nxp_ip 0:a624e2eeccac 89 {
nxp_ip 0:a624e2eeccac 90 unsigned int pattern = 0x00000000;
nxp_ip 0:a624e2eeccac 91 short src[ 4 ];
nxp_ip 0:a624e2eeccac 92 short port_select;
nxp_ip 0:a624e2eeccac 93 char v[ 7 ];
nxp_ip 0:a624e2eeccac 94 int i;
nxp_ip 0:a624e2eeccac 95 int grp;
nxp_ip 0:a624e2eeccac 96
nxp_ip 0:a624e2eeccac 97 v[ 0 ] = GRAD_MODE_SEL0 | AUTO_INCREMENT;
nxp_ip 0:a624e2eeccac 98
nxp_ip 0:a624e2eeccac 99 port_select = g0 | g1 | g2 | g3;
nxp_ip 0:a624e2eeccac 100 v[ 1 ] = (port_select >> 0) & 0xFF;
nxp_ip 0:a624e2eeccac 101 v[ 2 ] = (port_select >> 8) & 0xFF;
nxp_ip 0:a624e2eeccac 102
nxp_ip 0:a624e2eeccac 103 if ( 0x0000 == port_select ) {
nxp_ip 0:a624e2eeccac 104 write( v, 3 );
nxp_ip 0:a624e2eeccac 105 return;
nxp_ip 0:a624e2eeccac 106 }
nxp_ip 0:a624e2eeccac 107
nxp_ip 0:a624e2eeccac 108 src[ 0 ] = g0;
nxp_ip 0:a624e2eeccac 109 src[ 1 ] = g1;
nxp_ip 0:a624e2eeccac 110 src[ 2 ] = g2;
nxp_ip 0:a624e2eeccac 111 src[ 3 ] = g3;
nxp_ip 0:a624e2eeccac 112
nxp_ip 0:a624e2eeccac 113 for ( i = 0; i < 16; i++ ) {
nxp_ip 0:a624e2eeccac 114 for ( grp = 0; grp < 4; grp++ ) {
nxp_ip 0:a624e2eeccac 115 if ( src[ grp ] & (0x1 << i) )
nxp_ip 0:a624e2eeccac 116 pattern |= grp << (i * 2);
nxp_ip 0:a624e2eeccac 117 }
nxp_ip 0:a624e2eeccac 118 }
nxp_ip 0:a624e2eeccac 119
nxp_ip 0:a624e2eeccac 120 for ( i = 0; i < 4; i++ )
nxp_ip 0:a624e2eeccac 121 v[ i + 3 ] = 0xFF & (pattern >> (i * 8));
nxp_ip 0:a624e2eeccac 122
nxp_ip 0:a624e2eeccac 123 write( v, sizeof( v ) );
nxp_ip 0:a624e2eeccac 124 }
nxp_ip 0:a624e2eeccac 125
nxp_ip 0:a624e2eeccac 126 void PCA9955A::gradation_group_setting( char group, char port )
nxp_ip 0:a624e2eeccac 127 {
nxp_ip 0:a624e2eeccac 128 short g[ 4 ] = { 0x0000 };
nxp_ip 0:a624e2eeccac 129
nxp_ip 0:a624e2eeccac 130 port &= 0xF;
nxp_ip 0:a624e2eeccac 131 gradation_group[ port ] = (group < 4) ? group : NOGROUP;
nxp_ip 0:a624e2eeccac 132
nxp_ip 0:a624e2eeccac 133 for ( int i = 0; i < 16; i++ ) {
nxp_ip 0:a624e2eeccac 134 if ( gradation_group[ i ] != NOGROUP )
nxp_ip 0:a624e2eeccac 135 g[ gradation_group[ i ] ] |= 0x0001 << i;
nxp_ip 0:a624e2eeccac 136 }
nxp_ip 0:a624e2eeccac 137
nxp_ip 0:a624e2eeccac 138 group_selector( g[ 0 ], g[ 1 ], g[ 2 ], g[ 3 ] );
nxp_ip 0:a624e2eeccac 139 // pwm( port, 1.0 );
nxp_ip 0:a624e2eeccac 140 pwm( port, 0.3 );
nxp_ip 0:a624e2eeccac 141 }
nxp_ip 0:a624e2eeccac 142
nxp_ip 0:a624e2eeccac 143 void PCA9955A::gradation_group_clear( void )
nxp_ip 0:a624e2eeccac 144 {
nxp_ip 0:a624e2eeccac 145 for ( int i = 0; i < 16; i++ ) {
nxp_ip 0:a624e2eeccac 146 gradation_group[ i ] = NOGROUP;
nxp_ip 0:a624e2eeccac 147 }
nxp_ip 0:a624e2eeccac 148
nxp_ip 0:a624e2eeccac 149 group_selector( 0, 0, 0, 0 );
nxp_ip 0:a624e2eeccac 150 }
nxp_ip 0:a624e2eeccac 151
nxp_ip 0:a624e2eeccac 152 float PCA9955A::gradation_ramp_setting( char group, float cycle, char flag_on, char flag_off, int ramp_flag )
nxp_ip 0:a624e2eeccac 153 {
nxp_ip 0:a624e2eeccac 154 int ramp_time;
nxp_ip 0:a624e2eeccac 155 char prescaler;
nxp_ip 0:a624e2eeccac 156 int required_steps;
nxp_ip 0:a624e2eeccac 157 char mult_factor;
nxp_ip 0:a624e2eeccac 158 char iref_inc;
nxp_ip 0:a624e2eeccac 159 int iref = 255;
nxp_ip 0:a624e2eeccac 160
nxp_ip 0:a624e2eeccac 161 #define RAMP_RATE_GRP 1
nxp_ip 0:a624e2eeccac 162 #define STEP_TIME_GRP 2
nxp_ip 0:a624e2eeccac 163 #define HOLD_CNTL_GRP 3
nxp_ip 0:a624e2eeccac 164 #define IREF_GRP 4
nxp_ip 0:a624e2eeccac 165
nxp_ip 0:a624e2eeccac 166 char regs[ 5 ];
nxp_ip 0:a624e2eeccac 167
nxp_ip 0:a624e2eeccac 168 float hold_time[] = {
nxp_ip 0:a624e2eeccac 169 0.00,
nxp_ip 0:a624e2eeccac 170 0.25,
nxp_ip 0:a624e2eeccac 171 0.50,
nxp_ip 0:a624e2eeccac 172 0.75,
nxp_ip 0:a624e2eeccac 173 1.00,
nxp_ip 0:a624e2eeccac 174 2.00,
nxp_ip 0:a624e2eeccac 175 4.00,
nxp_ip 0:a624e2eeccac 176 6.00
nxp_ip 0:a624e2eeccac 177 };
nxp_ip 0:a624e2eeccac 178
nxp_ip 0:a624e2eeccac 179
nxp_ip 0:a624e2eeccac 180 if ( ramp_flag == NO_RAMP ) {
nxp_ip 0:a624e2eeccac 181 iref_inc = 1;
nxp_ip 0:a624e2eeccac 182 ramp_time = 0;
nxp_ip 0:a624e2eeccac 183 prescaler = 0;
nxp_ip 0:a624e2eeccac 184 required_steps = 0;
nxp_ip 0:a624e2eeccac 185 mult_factor = 0;
nxp_ip 0:a624e2eeccac 186 } else {
nxp_ip 0:a624e2eeccac 187 ramp_time = (int)((cycle - (hold_time[ flag_on ] + hold_time[ flag_off ])) / ((ramp_flag == RAMP_UP_DOWN) ? 2.0 : 1.0) * 1000);
nxp_ip 0:a624e2eeccac 188
nxp_ip 0:a624e2eeccac 189 prescaler = ( ramp_time <= 32 * (iref + 1)) ? 0 : 1;
nxp_ip 0:a624e2eeccac 190
nxp_ip 0:a624e2eeccac 191 if ( prescaler )
nxp_ip 0:a624e2eeccac 192 required_steps = ramp_time / 8;
nxp_ip 0:a624e2eeccac 193 else
nxp_ip 0:a624e2eeccac 194 required_steps = ramp_time * 2;
nxp_ip 0:a624e2eeccac 195
nxp_ip 0:a624e2eeccac 196 if ( iref < required_steps ) {
nxp_ip 0:a624e2eeccac 197 iref_inc = 1;
nxp_ip 0:a624e2eeccac 198 mult_factor = required_steps / (iref + 1);
nxp_ip 0:a624e2eeccac 199 mult_factor = (mult_factor <= 0) ? 1 : mult_factor;
nxp_ip 0:a624e2eeccac 200 mult_factor = (64 < mult_factor) ? 64 : mult_factor;
nxp_ip 0:a624e2eeccac 201 } else {
nxp_ip 0:a624e2eeccac 202 iref_inc = (iref + 1) / required_steps;
nxp_ip 0:a624e2eeccac 203 iref_inc = (iref_inc <= 0) ? 1 : iref_inc;
nxp_ip 0:a624e2eeccac 204 iref_inc = (64 < iref_inc) ? 64 : iref_inc;
nxp_ip 0:a624e2eeccac 205 mult_factor = 1;
nxp_ip 0:a624e2eeccac 206 }
nxp_ip 0:a624e2eeccac 207 }
nxp_ip 0:a624e2eeccac 208
nxp_ip 0:a624e2eeccac 209 // printf( "ramp_time=%d, required_steps=%d, iref=%d\r\n", ramp_time, required_steps, iref );
nxp_ip 0:a624e2eeccac 210 // printf( "prescaler = %d, mult_factor=%d, iref_inc=%d\r\n", prescaler, mult_factor, iref_inc );
nxp_ip 0:a624e2eeccac 211 // printf( "\r\n" );
nxp_ip 0:a624e2eeccac 212
nxp_ip 0:a624e2eeccac 213 regs[ 0 ] = 0x80 | (RAMP_RATE_GRP0 + (group * 4));
nxp_ip 0:a624e2eeccac 214 regs[ RAMP_RATE_GRP ] = (ramp_flag << 6) | (iref_inc - 1);
nxp_ip 0:a624e2eeccac 215 regs[ STEP_TIME_GRP ] = (prescaler << 6) | (mult_factor - 1);
nxp_ip 0:a624e2eeccac 216 regs[ HOLD_CNTL_GRP ] = 0xC0 | (flag_on << 3) | flag_off;
nxp_ip 0:a624e2eeccac 217 regs[ IREF_GRP ] = iref;
nxp_ip 0:a624e2eeccac 218
nxp_ip 0:a624e2eeccac 219 write( regs, sizeof( regs ) );
nxp_ip 0:a624e2eeccac 220
nxp_ip 0:a624e2eeccac 221 #if 0
nxp_ip 0:a624e2eeccac 222 float n_of_steps;
nxp_ip 0:a624e2eeccac 223 float single_ramp_time;
nxp_ip 0:a624e2eeccac 224 float total_ramp_time;
nxp_ip 0:a624e2eeccac 225
nxp_ip 0:a624e2eeccac 226 n_of_steps = (float)(((iref + 1) / iref_inc) * mult_factor);
nxp_ip 0:a624e2eeccac 227 single_ramp_time = n_of_steps * (prescaler ? 8.0 : 0.5);
nxp_ip 0:a624e2eeccac 228 total_ramp_time = single_ramp_time * ((ramp_flag == RAMP_UP_DOWN) ? 2.0 : 1.0);
nxp_ip 0:a624e2eeccac 229 printf( "n_of_steps = %f, single_ramp_time=%f, total_ramp_time=%f\r\n", n_of_steps, single_ramp_time, total_ramp_time );
nxp_ip 0:a624e2eeccac 230 printf( "hold_time[ flag_on ] = %f, hold_time[ flag_off ]=%f\r\n", hold_time[ flag_on ], hold_time[ flag_off ] );
nxp_ip 0:a624e2eeccac 231 #endif
nxp_ip 0:a624e2eeccac 232
nxp_ip 0:a624e2eeccac 233 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 ]) );
nxp_ip 0:a624e2eeccac 234 }
nxp_ip 0:a624e2eeccac 235
nxp_ip 0:a624e2eeccac 236
nxp_ip 0:a624e2eeccac 237 void PCA9955A::dump_gradation_registers( void )
nxp_ip 0:a624e2eeccac 238 {
nxp_ip 0:a624e2eeccac 239 char data[ 23 ];
nxp_ip 0:a624e2eeccac 240
nxp_ip 0:a624e2eeccac 241 read( RAMP_RATE_GRP0, data, sizeof( data ) );
nxp_ip 0:a624e2eeccac 242
nxp_ip 0:a624e2eeccac 243 printf( "GRAD_MODE_SEL[1|0] = 0x%02X%02X\r\n", data[ 17 ], data[ 16 ] );
nxp_ip 0:a624e2eeccac 244 printf( "GRAD_GRP_SEL[3|2|1|0] = 0x%02X%02X%02X%02X\r\n", data[ 21 ], data[ 20 ], data[ 19 ], data[ 18 ] );
nxp_ip 0:a624e2eeccac 245 printf( "GRAD_CNTL = 0x%02X\r\n", data[ 22 ] );
nxp_ip 0:a624e2eeccac 246 printf( "RAMP_RATE = 0x%02X 0x%02X 0x%02X 0x%02X\r\n", data[ 0 ], data[ 4 ], data[ 8 ], data[ 12 ] );
nxp_ip 0:a624e2eeccac 247 printf( "STEP_TIME = 0x%02X 0x%02X 0x%02X 0x%02X\r\n", data[ 1 ], data[ 5 ], data[ 9 ], data[ 13 ] );
nxp_ip 0:a624e2eeccac 248 printf( "HOLD_CNTL = 0x%02X 0x%02X 0x%02X 0x%02X\r\n", data[ 2 ], data[ 6 ], data[ 10 ], data[ 14 ] );
nxp_ip 0:a624e2eeccac 249 printf( "IREF = 0x%02X 0x%02X 0x%02X 0x%02X\r\n", data[ 3 ], data[ 7 ], data[ 11 ], data[ 15 ] );
nxp_ip 0:a624e2eeccac 250 printf( "\r\n" );
nxp_ip 0:a624e2eeccac 251 }