LEDDriver_NXP_Arduino 0.4.0
LED driver device operation sample code for Arduino
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LEDDriver.cpp
1#include "LEDDriver.h"
2
3/* LEDDriver class ******************************************/
4
5LEDDriver::LEDDriver( uint8_t n_ch, uint8_t PWM_r, uint8_t oe ) :
6 n_channel( n_ch ), reg_PWM( PWM_r ), oe_pin( oe ), bp( NULL )
7{
8}
9
10LEDDriver::~LEDDriver()
11{
12 if ( bp )
13 delete[] bp;
14}
15
16void LEDDriver::pwm( uint8_t ch, float value )
17{
18 if ( bp ) {
19 bp[ ch ] = (uint8_t)(value * 255.0);
20 }
21 else {
22 reg_access( reg_PWM + ch, (uint8_t)(value * 255.0) );
23 }
24}
25
26void LEDDriver::pwm( float* values )
27{
28 if ( bp ) {
29 for ( int i = 0; i < n_channel; i++ )
30 bp[ i ] = (uint8_t)(values[ i ] * 255.0);
31 }
32 else {
33 uint8_t v[ n_channel ];
34 for ( int i = 0; i < n_channel; i++ )
35 v[ i ] = (uint8_t)(values[ i ] * 255.0);
36
37 reg_access( 0x80 | reg_PWM, v, n_channel );
38 }
39}
40
41void LEDDriver::flush( void )
42{
43 if ( bp )
44 reg_access( 0x80 | reg_PWM, bp, n_channel );
45}
46
47void LEDDriver::buffer_enable( bool flag )
48{
49 if ( bp ) {
50 delete[] bp;
51 bp = NULL;
52 }
53
54 if ( flag ) {
55 bp = new uint8_t[ n_channel ];
56 for ( int i = 0; i < n_channel; i++ )
57 bp[ i ] = 0x00;
58 }
59
60}
61
62
63/* PCA995x class ******************************************/
64
65PCA995x::PCA995x( uint8_t n_ch, uint8_t PWM_r, uint8_t IREF_r, uint8_t IREFALL_r, const uint8_t* ar, uint8_t oe ) :
66 LEDDriver( n_ch, PWM_r, oe ), reg_IREF( IREF_r ), reg_IREFALL( IREFALL_r ), arp( ar )
67{
68 // do nothing.
69 // leave it in default state.
70}
71
72PCA995x::~PCA995x()
73{
74}
75
76void PCA995x::begin( float current, board env, bool bflag )
77{
78 init( current );
79
80 if ( env ) {
81 pinMode( oe_pin, OUTPUT );
82 digitalWrite( oe_pin , 0 );
83 }
84
85 buffer_enable( bflag );
86}
87
88void PCA995x::irefall( uint8_t iref )
89{
90 reg_access( reg_IREFALL, iref );
91}
92
93
94
95/* PCA995x_I2C class ******************************************/
96
97PCA995x_I2C::PCA995x_I2C( uint8_t i2c_address, uint8_t n_ch, uint8_t PWM_r, uint8_t IREF_r, uint8_t IREFALL_r, const uint8_t* ar, uint8_t oe ) :
98 PCA995x( n_ch, PWM_r, IREF_r, IREFALL_r, ar, oe ),
99 I2C_device( i2c_address )
100{
101 // do nothing.
102 // leave it in default state.
103}
104
105PCA995x_I2C::~PCA995x_I2C()
106{
107}
108
109void PCA995x_I2C::reg_access( uint8_t reg, uint8_t val )
110{
111 write_r8( reg, val );
112}
113
114void PCA995x_I2C::reg_access( uint8_t reg, uint8_t *vp, int len )
115{
116 reg_w( 0x80 | reg, vp, len );
117}
118
119uint8_t PCA995x_I2C::reg_access( uint8_t reg )
120{
121 return read_r8( reg );
122}
123
124void PCA995x_I2C::reg_access_r( uint8_t reg, uint8_t *vp, int len )
125{
126 reg_r( 0x80 | reg, vp, len );
127}
128
129
130
131/* PCA995x_SPI class ******************************************/
132
133PCA995x_SPI::PCA995x_SPI( uint8_t n_ch, uint8_t PWM_r, uint8_t IREF_r, uint8_t IREFALL_r, const uint8_t* ar, uint8_t oe ) :
134 PCA995x( n_ch, PWM_r, IREF_r, IREFALL_r, ar, oe )
135{
136 // do nothing.
137 // leave it in default state.
138}
139
140PCA995x_SPI::~PCA995x_SPI()
141{
142}
143
144void PCA995x_SPI::txrx( uint8_t *data, int size )
145{
146 digitalWrite( SS, LOW );
147 SPI.transfer( data, size );
148 digitalWrite( SS, HIGH );
149}
150
151void PCA995x_SPI::reg_access( uint8_t reg, uint8_t val )
152{
153 uint8_t data[] = { (uint8_t)(reg << 1), val };
154
155 txrx( data, sizeof( data ) );
156}
157
158void PCA995x_SPI::reg_access( uint8_t reg, uint8_t *vp, int len )
159{
160 uint8_t data[ len * 2 ];
161
162 for ( int i = 0; i < len; i++ ) {
163 data[ i * 2 + 0 ] = (reg << 1) + (i * 2);
164 data[ i * 2 + 1 ] = vp[ i ];
165 }
166
167 for ( int i = 0; i < len * 2; i += 2 )
168 txrx( data + i, 2 );
169}
170
171uint8_t PCA995x_SPI::reg_access( uint8_t reg )
172{
173 uint8_t data0[ 2 ] = { (uint8_t)((reg << 1) | 0x01), 0xFF };
174 uint8_t data1[ 2 ] = { 0xFF, 0xFF };
175
176 txrx( data0, sizeof( data0 ) );
177 txrx( data1, sizeof( data1 ) );
178
179 return data1[ 1 ];
180}
181
182void PCA995x_SPI::reg_access_r( uint8_t reg, uint8_t *vp, int len )
183{
184 for ( int i = 0; i < len; i++ ) {
185 *vp++ = reg_access( reg + i );
186 }
187}
188
189void PCA995x_SPI::reg_w( uint8_t reg, uint8_t val )
190{
191 reg_access( reg, val );
192}
193
194void PCA995x_SPI::reg_w( uint8_t reg, uint8_t *vp, int len )
195{
196 reg_access( reg, vp, len );
197}
198
199uint8_t PCA995x_SPI::reg_r( uint8_t reg )
200{
201 return reg_access( reg );
202}
203
204void PCA995x_SPI::reg_r( uint8_t reg, uint8_t *vp, int len )
205{
206 reg_access_r( reg, vp, len );
207}
208
209void PCA995x_SPI::write_r8( uint8_t reg, uint8_t val )
210{
211 reg_w( reg, val );
212}
213
214uint8_t PCA995x_SPI::read_r8( uint8_t reg )
215{
216 return reg_r( reg );
217}
218
219void PCA995x_SPI::irefall( uint8_t iref )
220{
221 write_r8( reg_IREFALL, iref );
222}
223
224void PCA995x_SPI::pwm( uint8_t ch, float value )
225{
226 write_r8( reg_PWM + ch, (uint8_t)(value * 255.0) );
227}
228
229void PCA995x_SPI::pwm( float* values )
230{
231 uint8_t v[ n_channel ];
232 for ( int i = 0; i < n_channel; i++ )
233 v[ i ] = (uint8_t)(values[ i ] * 255.0);
234
235 reg_w( reg_PWM, v, n_channel );
236}
void pwm(uint8_t ch, float value)
Definition: LEDDriver.cpp:16
void buffer_enable(bool flag)
Definition: LEDDriver.cpp:47
void flush(void)
Definition: LEDDriver.cpp:41
void irefall(uint8_t iref)
Definition: LEDDriver.cpp:219
void irefall(uint8_t iref)
Definition: LEDDriver.cpp:88