Thomas Butler / PCA995xA

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Dependencies:   CompLedDvrCC

Fork of PCA995xA by InetrfaceProducts NXP

PCA9955A/PCA9955A.cpp@7:56a45c690801, 2018-08-14 (annotated)

Committer:
tb942
Date:
Tue Aug 14 18:26:35 2018 +0000
Revision:
7:56a45c690801
Parent:
6:1c6e1af61981 
removed #include mbed.h - it's not needed;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nxp_ip 0:a624e2eeccac 1 #include "PCA9955A.h"
nxp_ip 0:a624e2eeccac 2
nxp_ip 0:a624e2eeccac 3 PCA9955A::PCA9955A( PinName i2c_sda, PinName i2c_scl, char i2c_address )
nxp_ip 0:a624e2eeccac 4 : PCA995xA( i2c_sda, i2c_scl, i2c_address ), n_of_ports( 16 )
nxp_ip 0:a624e2eeccac 5 {
nxp_ip 0:a624e2eeccac 6 initialize();
nxp_ip 0:a624e2eeccac 7 }
nxp_ip 0:a624e2eeccac 8
nxp_ip 0:a624e2eeccac 9 PCA9955A::PCA9955A( I2C &i2c_obj, char i2c_address )
nxp_ip 0:a624e2eeccac 10 : PCA995xA( i2c_obj, i2c_address ), n_of_ports( 16 )
nxp_ip 0:a624e2eeccac 11 {
nxp_ip 0:a624e2eeccac 12 initialize();
nxp_ip 0:a624e2eeccac 13 }
nxp_ip 0:a624e2eeccac 14
nxp_ip 0:a624e2eeccac 15 PCA9955A::~PCA9955A()
nxp_ip 0:a624e2eeccac 16 {
nxp_ip 0:a624e2eeccac 17 }
nxp_ip 0:a624e2eeccac 18
nxp_ip 0:a624e2eeccac 19 void PCA9955A::initialize( void )
nxp_ip 0:a624e2eeccac 20 {
nxp_ip 0:a624e2eeccac 21 char init_array[] = {
nxp_ip 0:a624e2eeccac 22 PCA995xA::AUTO_INCREMENT | REGISTER_START, // Command
nxp_ip 0:a624e2eeccac 23 0x00, 0x00, // MODE1, MODE2
nxp_ip 0:a624e2eeccac 24 0xAA, 0xAA, 0xAA, 0xAA, // LEDOUT[3:0]
nxp_ip 0:a624e2eeccac 25 0x80, 0x00, // GRPPWM, GRPFREQ
nxp_ip 0:a624e2eeccac 26 };
nxp_ip 0:a624e2eeccac 27
nxp_ip 0:a624e2eeccac 28 pwm( ALLPORTS, 0.0 );
nxp_ip 0:a624e2eeccac 29 current( ALLPORTS, 0.1 );
nxp_ip 0:a624e2eeccac 30
nxp_ip 0:a624e2eeccac 31 write( init_array, sizeof( init_array ) );
nxp_ip 0:a624e2eeccac 32 gradation_group_clear();
nxp_ip 0:a624e2eeccac 33 }
nxp_ip 0:a624e2eeccac 34
nxp_ip 0:a624e2eeccac 35 char PCA9955A::pwm_register_access( int port )
nxp_ip 0:a624e2eeccac 36 {
nxp_ip 0:a624e2eeccac 37 if ( port < n_of_ports )
nxp_ip 0:a624e2eeccac 38 return ( PWM_REGISTER_START + port );
nxp_ip 0:a624e2eeccac 39
nxp_ip 0:a624e2eeccac 40 return ( PWMALL );
nxp_ip 0:a624e2eeccac 41 }
nxp_ip 0:a624e2eeccac 42
nxp_ip 0:a624e2eeccac 43 char PCA9955A::current_register_access( int port )
nxp_ip 0:a624e2eeccac 44 {
nxp_ip 0:a624e2eeccac 45 if ( port < n_of_ports )
nxp_ip 0:a624e2eeccac 46 return ( IREF_REGISTER_START + port );
nxp_ip 0:a624e2eeccac 47
nxp_ip 0:a624e2eeccac 48 return ( IREFALL );
nxp_ip 0:a624e2eeccac 49 }
nxp_ip 0:a624e2eeccac 50
nxp_ip 0:a624e2eeccac 51 int PCA9955A::number_of_ports( void )
nxp_ip 0:a624e2eeccac 52 {
nxp_ip 0:a624e2eeccac 53 return ( n_of_ports );
nxp_ip 0:a624e2eeccac 54 }
nxp_ip 0:a624e2eeccac 55
nxp_ip 0:a624e2eeccac 56
nxp_ip 0:a624e2eeccac 57 char PCA9955A::gradation_group[ 16 ] = { 0xFF };
nxp_ip 0:a624e2eeccac 58
nxp_ip 0:a624e2eeccac 59 void PCA9955A::gradation_setting( int group, char ramp_rate, char step_time, char hold_cntl, char iref )
nxp_ip 0:a624e2eeccac 60 {
nxp_ip 0:a624e2eeccac 61 char data[ 5 ] = { (RAMP_RATE_GRP0 + (group * GRAD_GROUP_OFFSET)) | AUTO_INCREMENT,
nxp_ip 0:a624e2eeccac 62 ramp_rate,
nxp_ip 0:a624e2eeccac 63 step_time,
nxp_ip 0:a624e2eeccac 64 hold_cntl,
nxp_ip 0:a624e2eeccac 65 iref
nxp_ip 0:a624e2eeccac 66 };
nxp_ip 0:a624e2eeccac 67
nxp_ip 0:a624e2eeccac 68 write( data, sizeof( data ) );
nxp_ip 0:a624e2eeccac 69 }
nxp_ip 0:a624e2eeccac 70
nxp_ip 0:a624e2eeccac 71 void PCA9955A::gradation_start( char group, char continuous_flag )
nxp_ip 0:a624e2eeccac 72 {
nxp_ip 0:a624e2eeccac 73 static char v[] = { GRAD_CNTL, 0 };
okano 6:1c6e1af61981 74 char rd;
okano 6:1c6e1af61981 75
okano 6:1c6e1af61981 76 rd = read( GRAD_CNTL ) & ~(0x3 << (group * 2));
okano 6:1c6e1af61981 77
okano 6:1c6e1af61981 78 printf( "rd = 0x%02X\r\n", rd );
okano 6:1c6e1af61981 79 v[ 1 ] = rd | ((0x02 | continuous_flag) << (group * 2));
nxp_ip 0:a624e2eeccac 80 // v[ 1 ] = ((0x02 | continuous_flag) << (group * 2));
nxp_ip 0:a624e2eeccac 81 write( v, sizeof( v ) );
nxp_ip 0:a624e2eeccac 82 }
nxp_ip 0:a624e2eeccac 83
nxp_ip 0:a624e2eeccac 84 void PCA9955A::gradation_stop( void )
nxp_ip 0:a624e2eeccac 85 {
nxp_ip 0:a624e2eeccac 86 char v[] = { GRAD_CNTL, 0 };
nxp_ip 0:a624e2eeccac 87
nxp_ip 0:a624e2eeccac 88 write( v, sizeof( v ) );
nxp_ip 0:a624e2eeccac 89 }
nxp_ip 0:a624e2eeccac 90
nxp_ip 0:a624e2eeccac 91 void PCA9955A::group_selector( short g0, short g1, short g2, short g3 )
nxp_ip 0:a624e2eeccac 92 {
nxp_ip 0:a624e2eeccac 93 unsigned int pattern = 0x00000000;
nxp_ip 0:a624e2eeccac 94 short src[ 4 ];
nxp_ip 0:a624e2eeccac 95 short port_select;
nxp_ip 0:a624e2eeccac 96 char v[ 7 ];
nxp_ip 0:a624e2eeccac 97 int i;
nxp_ip 0:a624e2eeccac 98 int grp;
nxp_ip 0:a624e2eeccac 99
nxp_ip 0:a624e2eeccac 100 v[ 0 ] = GRAD_MODE_SEL0 | AUTO_INCREMENT;
nxp_ip 0:a624e2eeccac 101
nxp_ip 0:a624e2eeccac 102 port_select = g0 | g1 | g2 | g3;
nxp_ip 0:a624e2eeccac 103 v[ 1 ] = (port_select >> 0) & 0xFF;
nxp_ip 0:a624e2eeccac 104 v[ 2 ] = (port_select >> 8) & 0xFF;
nxp_ip 0:a624e2eeccac 105
nxp_ip 0:a624e2eeccac 106 if ( 0x0000 == port_select ) {
nxp_ip 0:a624e2eeccac 107 write( v, 3 );
nxp_ip 0:a624e2eeccac 108 return;
nxp_ip 0:a624e2eeccac 109 }
nxp_ip 0:a624e2eeccac 110
nxp_ip 0:a624e2eeccac 111 src[ 0 ] = g0;
nxp_ip 0:a624e2eeccac 112 src[ 1 ] = g1;
nxp_ip 0:a624e2eeccac 113 src[ 2 ] = g2;
nxp_ip 0:a624e2eeccac 114 src[ 3 ] = g3;
nxp_ip 0:a624e2eeccac 115
nxp_ip 0:a624e2eeccac 116 for ( i = 0; i < 16; i++ ) {
nxp_ip 0:a624e2eeccac 117 for ( grp = 0; grp < 4; grp++ ) {
nxp_ip 0:a624e2eeccac 118 if ( src[ grp ] & (0x1 << i) )
nxp_ip 0:a624e2eeccac 119 pattern |= grp << (i * 2);
nxp_ip 0:a624e2eeccac 120 }
nxp_ip 0:a624e2eeccac 121 }
nxp_ip 0:a624e2eeccac 122
nxp_ip 0:a624e2eeccac 123 for ( i = 0; i < 4; i++ )
nxp_ip 0:a624e2eeccac 124 v[ i + 3 ] = 0xFF & (pattern >> (i * 8));
nxp_ip 0:a624e2eeccac 125
nxp_ip 0:a624e2eeccac 126 write( v, sizeof( v ) );
nxp_ip 0:a624e2eeccac 127 }
nxp_ip 0:a624e2eeccac 128
nxp_ip 0:a624e2eeccac 129 void PCA9955A::gradation_group_setting( char group, char port )
nxp_ip 0:a624e2eeccac 130 {
nxp_ip 0:a624e2eeccac 131 short g[ 4 ] = { 0x0000 };
nxp_ip 0:a624e2eeccac 132
nxp_ip 0:a624e2eeccac 133 port &= 0xF;
nxp_ip 0:a624e2eeccac 134 gradation_group[ port ] = (group < 4) ? group : NOGROUP;
nxp_ip 0:a624e2eeccac 135
nxp_ip 0:a624e2eeccac 136 for ( int i = 0; i < 16; i++ ) {
nxp_ip 0:a624e2eeccac 137 if ( gradation_group[ i ] != NOGROUP )
nxp_ip 0:a624e2eeccac 138 g[ gradation_group[ i ] ] |= 0x0001 << i;
nxp_ip 0:a624e2eeccac 139 }
nxp_ip 0:a624e2eeccac 140
nxp_ip 0:a624e2eeccac 141 group_selector( g[ 0 ], g[ 1 ], g[ 2 ], g[ 3 ] );
nxp_ip 0:a624e2eeccac 142 // pwm( port, 1.0 );
nxp_ip 0:a624e2eeccac 143 pwm( port, 0.3 );
nxp_ip 0:a624e2eeccac 144 }
nxp_ip 0:a624e2eeccac 145
nxp_ip 0:a624e2eeccac 146 void PCA9955A::gradation_group_clear( void )
nxp_ip 0:a624e2eeccac 147 {
nxp_ip 0:a624e2eeccac 148 for ( int i = 0; i < 16; i++ ) {
nxp_ip 0:a624e2eeccac 149 gradation_group[ i ] = NOGROUP;
nxp_ip 0:a624e2eeccac 150 }
nxp_ip 0:a624e2eeccac 151
nxp_ip 0:a624e2eeccac 152 group_selector( 0, 0, 0, 0 );
nxp_ip 0:a624e2eeccac 153 }
nxp_ip 0:a624e2eeccac 154
nxp_ip 0:a624e2eeccac 155 float PCA9955A::gradation_ramp_setting( char group, float cycle, char flag_on, char flag_off, int ramp_flag )
nxp_ip 0:a624e2eeccac 156 {
nxp_ip 0:a624e2eeccac 157 int ramp_time;
nxp_ip 0:a624e2eeccac 158 char prescaler;
nxp_ip 0:a624e2eeccac 159 int required_steps;
nxp_ip 0:a624e2eeccac 160 char mult_factor;
nxp_ip 0:a624e2eeccac 161 char iref_inc;
nxp_ip 0:a624e2eeccac 162 int iref = 255;
nxp_ip 0:a624e2eeccac 163
nxp_ip 0:a624e2eeccac 164 #define RAMP_RATE_GRP 1
nxp_ip 0:a624e2eeccac 165 #define STEP_TIME_GRP 2
nxp_ip 0:a624e2eeccac 166 #define HOLD_CNTL_GRP 3
nxp_ip 0:a624e2eeccac 167 #define IREF_GRP 4
nxp_ip 0:a624e2eeccac 168
nxp_ip 0:a624e2eeccac 169 char regs[ 5 ];
nxp_ip 0:a624e2eeccac 170
nxp_ip 0:a624e2eeccac 171 float hold_time[] = {
nxp_ip 0:a624e2eeccac 172 0.00,
nxp_ip 0:a624e2eeccac 173 0.25,
nxp_ip 0:a624e2eeccac 174 0.50,
nxp_ip 0:a624e2eeccac 175 0.75,
nxp_ip 0:a624e2eeccac 176 1.00,
nxp_ip 0:a624e2eeccac 177 2.00,
nxp_ip 0:a624e2eeccac 178 4.00,
nxp_ip 0:a624e2eeccac 179 6.00
nxp_ip 0:a624e2eeccac 180 };
nxp_ip 0:a624e2eeccac 181
nxp_ip 0:a624e2eeccac 182
nxp_ip 0:a624e2eeccac 183 if ( ramp_flag == NO_RAMP ) {
nxp_ip 0:a624e2eeccac 184 iref_inc = 1;
nxp_ip 0:a624e2eeccac 185 ramp_time = 0;
nxp_ip 0:a624e2eeccac 186 prescaler = 0;
nxp_ip 0:a624e2eeccac 187 required_steps = 0;
nxp_ip 0:a624e2eeccac 188 mult_factor = 0;
nxp_ip 0:a624e2eeccac 189 } else {
nxp_ip 0:a624e2eeccac 190 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 191
nxp_ip 0:a624e2eeccac 192 prescaler = ( ramp_time <= 32 * (iref + 1)) ? 0 : 1;
nxp_ip 0:a624e2eeccac 193
nxp_ip 0:a624e2eeccac 194 if ( prescaler )
nxp_ip 0:a624e2eeccac 195 required_steps = ramp_time / 8;
nxp_ip 0:a624e2eeccac 196 else
nxp_ip 0:a624e2eeccac 197 required_steps = ramp_time * 2;
nxp_ip 0:a624e2eeccac 198
nxp_ip 0:a624e2eeccac 199 if ( iref < required_steps ) {
nxp_ip 0:a624e2eeccac 200 iref_inc = 1;
nxp_ip 0:a624e2eeccac 201 mult_factor = required_steps / (iref + 1);
nxp_ip 0:a624e2eeccac 202 mult_factor = (mult_factor <= 0) ? 1 : mult_factor;
nxp_ip 0:a624e2eeccac 203 mult_factor = (64 < mult_factor) ? 64 : mult_factor;
nxp_ip 0:a624e2eeccac 204 } else {
nxp_ip 0:a624e2eeccac 205 iref_inc = (iref + 1) / required_steps;
nxp_ip 0:a624e2eeccac 206 iref_inc = (iref_inc <= 0) ? 1 : iref_inc;
nxp_ip 0:a624e2eeccac 207 iref_inc = (64 < iref_inc) ? 64 : iref_inc;
nxp_ip 0:a624e2eeccac 208 mult_factor = 1;
nxp_ip 0:a624e2eeccac 209 }
nxp_ip 0:a624e2eeccac 210 }
nxp_ip 0:a624e2eeccac 211
nxp_ip 0:a624e2eeccac 212 // printf( "ramp_time=%d, required_steps=%d, iref=%d\r\n", ramp_time, required_steps, iref );
nxp_ip 0:a624e2eeccac 213 // printf( "prescaler = %d, mult_factor=%d, iref_inc=%d\r\n", prescaler, mult_factor, iref_inc );
nxp_ip 0:a624e2eeccac 214 // printf( "\r\n" );
nxp_ip 0:a624e2eeccac 215
nxp_ip 0:a624e2eeccac 216 regs[ 0 ] = 0x80 | (RAMP_RATE_GRP0 + (group * 4));
nxp_ip 0:a624e2eeccac 217 regs[ RAMP_RATE_GRP ] = (ramp_flag << 6) | (iref_inc - 1);
nxp_ip 0:a624e2eeccac 218 regs[ STEP_TIME_GRP ] = (prescaler << 6) | (mult_factor - 1);
nxp_ip 0:a624e2eeccac 219 regs[ HOLD_CNTL_GRP ] = 0xC0 | (flag_on << 3) | flag_off;
nxp_ip 0:a624e2eeccac 220 regs[ IREF_GRP ] = iref;
nxp_ip 0:a624e2eeccac 221
nxp_ip 0:a624e2eeccac 222 write( regs, sizeof( regs ) );
nxp_ip 0:a624e2eeccac 223
nxp_ip 0:a624e2eeccac 224 #if 0
nxp_ip 0:a624e2eeccac 225 float n_of_steps;
nxp_ip 0:a624e2eeccac 226 float single_ramp_time;
nxp_ip 0:a624e2eeccac 227 float total_ramp_time;
nxp_ip 0:a624e2eeccac 228
nxp_ip 0:a624e2eeccac 229 n_of_steps = (float)(((iref + 1) / iref_inc) * mult_factor);
nxp_ip 0:a624e2eeccac 230 single_ramp_time = n_of_steps * (prescaler ? 8.0 : 0.5);
nxp_ip 0:a624e2eeccac 231 total_ramp_time = single_ramp_time * ((ramp_flag == RAMP_UP_DOWN) ? 2.0 : 1.0);
nxp_ip 0:a624e2eeccac 232 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 233 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 234 #endif
nxp_ip 0:a624e2eeccac 235
nxp_ip 0:a624e2eeccac 236 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 237 }
nxp_ip 0:a624e2eeccac 238
nxp_ip 0:a624e2eeccac 239
nxp_ip 0:a624e2eeccac 240 void PCA9955A::dump_gradation_registers( void )
nxp_ip 0:a624e2eeccac 241 {
nxp_ip 0:a624e2eeccac 242 char data[ 23 ];
nxp_ip 0:a624e2eeccac 243
nxp_ip 0:a624e2eeccac 244 read( RAMP_RATE_GRP0, data, sizeof( data ) );
nxp_ip 0:a624e2eeccac 245
nxp_ip 0:a624e2eeccac 246 printf( "GRAD_MODE_SEL[1|0] = 0x%02X%02X\r\n", data[ 17 ], data[ 16 ] );
nxp_ip 0:a624e2eeccac 247 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 248 printf( "GRAD_CNTL = 0x%02X\r\n", data[ 22 ] );
nxp_ip 0:a624e2eeccac 249 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 250 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 251 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 252 printf( "IREF = 0x%02X 0x%02X 0x%02X 0x%02X\r\n", data[ 3 ], data[ 7 ], data[ 11 ], data[ 15 ] );
nxp_ip 0:a624e2eeccac 253 printf( "\r\n" );
nxp_ip 0:a624e2eeccac 254 }