Hello Together,
Currently, I have connected 2 DAC's (MCP4725) to Arduino UNO. Hardware connection is done. And also care is taken to assign each DAC different address i.e., (DAC 1 to 0x62 and DAC2 to 0x63). Now i want to see traingular waveform on Vout of DAC1 and Sine waveform on DAC2 simulatenously . As both waveforms are in examples list of adafruit MCP4725 library. How can i do that combining in one Arduino code.
It will be really helpful if programming part of this is sorted
Thanks a lot !
Combine them.
Post both sketches so we can see. Use the IDE "copy for forum" tool and paste here so the code looks good.
Arduino combine two sketches
Or
Arduino combine two programs
You are not the first to struggle with this…
a7
Code 1:
#include <Wire.h>
#include <Adafruit_MCP4725.h>
Adafruit_MCP4725 dac;
void setup(void) {
Serial.begin(9600);
Serial.println("Hello!");
// For Adafruit MCP4725A1 the address is 0x62 (default) or 0x63 (ADDR pin tied to VCC)
// For MCP4725A0 the address is 0x60 or 0x61
// For MCP4725A2 the address is 0x64 or 0x65
dac.begin(0x62);
Serial.println("Generating a triangle wave");
}
void loop(void) {
uint32_t counter;
// Run through the full 12-bit scale for a triangle wave
for (counter = 0; counter < 4095; counter++)
{
dac.setVoltage(counter, false);
}
for (counter = 4095; counter > 0; counter--)
{
dac.setVoltage(counter, false);
}
}
Code 2:
#include <Wire.h>
#include <Adafruit_MCP4725.h>
Adafruit_MCP4725 dac;
// Set this value to 9, 8, 7, 6 or 5 to adjust the resolution
#define DAC_RESOLUTION (8)
/* Note: If flash space is tight a quarter sine wave is enough
to generate full sine and cos waves, but some additional
calculation will be required at each step after the first
quarter wave. */
const PROGMEM uint16_t DACLookup_FullSine_9Bit[512] =
{
2048, 2073, 2098, 2123, 2148, 2174, 2199, 2224,
2249, 2274, 2299, 2324, 2349, 2373, 2398, 2423,
2448, 2472, 2497, 2521, 2546, 2570, 2594, 2618,
2643, 2667, 2690, 2714, 2738, 2762, 2785, 2808,
2832, 2855, 2878, 2901, 2924, 2946, 2969, 2991,
3013, 3036, 3057, 3079, 3101, 3122, 3144, 3165,
3186, 3207, 3227, 3248, 3268, 3288, 3308, 3328,
3347, 3367, 3386, 3405, 3423, 3442, 3460, 3478,
3496, 3514, 3531, 3548, 3565, 3582, 3599, 3615,
3631, 3647, 3663, 3678, 3693, 3708, 3722, 3737,
3751, 3765, 3778, 3792, 3805, 3817, 3830, 3842,
3854, 3866, 3877, 3888, 3899, 3910, 3920, 3930,
3940, 3950, 3959, 3968, 3976, 3985, 3993, 4000,
4008, 4015, 4022, 4028, 4035, 4041, 4046, 4052,
4057, 4061, 4066, 4070, 4074, 4077, 4081, 4084,
4086, 4088, 4090, 4092, 4094, 4095, 4095, 4095,
4095, 4095, 4095, 4095, 4094, 4092, 4090, 4088,
4086, 4084, 4081, 4077, 4074, 4070, 4066, 4061,
4057, 4052, 4046, 4041, 4035, 4028, 4022, 4015,
4008, 4000, 3993, 3985, 3976, 3968, 3959, 3950,
3940, 3930, 3920, 3910, 3899, 3888, 3877, 3866,
3854, 3842, 3830, 3817, 3805, 3792, 3778, 3765,
3751, 3737, 3722, 3708, 3693, 3678, 3663, 3647,
3631, 3615, 3599, 3582, 3565, 3548, 3531, 3514,
3496, 3478, 3460, 3442, 3423, 3405, 3386, 3367,
3347, 3328, 3308, 3288, 3268, 3248, 3227, 3207,
3186, 3165, 3144, 3122, 3101, 3079, 3057, 3036,
3013, 2991, 2969, 2946, 2924, 2901, 2878, 2855,
2832, 2808, 2785, 2762, 2738, 2714, 2690, 2667,
2643, 2618, 2594, 2570, 2546, 2521, 2497, 2472,
2448, 2423, 2398, 2373, 2349, 2324, 2299, 2274,
2249, 2224, 2199, 2174, 2148, 2123, 2098, 2073,
2048, 2023, 1998, 1973, 1948, 1922, 1897, 1872,
1847, 1822, 1797, 1772, 1747, 1723, 1698, 1673,
1648, 1624, 1599, 1575, 1550, 1526, 1502, 1478,
1453, 1429, 1406, 1382, 1358, 1334, 1311, 1288,
1264, 1241, 1218, 1195, 1172, 1150, 1127, 1105,
1083, 1060, 1039, 1017, 995, 974, 952, 931,
910, 889, 869, 848, 828, 808, 788, 768,
749, 729, 710, 691, 673, 654, 636, 618,
600, 582, 565, 548, 531, 514, 497, 481,
465, 449, 433, 418, 403, 388, 374, 359,
345, 331, 318, 304, 291, 279, 266, 254,
242, 230, 219, 208, 197, 186, 176, 166,
156, 146, 137, 128, 120, 111, 103, 96,
88, 81, 74, 68, 61, 55, 50, 44,
39, 35, 30, 26, 22, 19, 15, 12,
10, 8, 6, 4, 2, 1, 1, 0,
0, 0, 1, 1, 2, 4, 6, 8,
10, 12, 15, 19, 22, 26, 30, 35,
39, 44, 50, 55, 61, 68, 74, 81,
88, 96, 103, 111, 120, 128, 137, 146,
156, 166, 176, 186, 197, 208, 219, 230,
242, 254, 266, 279, 291, 304, 318, 331,
345, 359, 374, 388, 403, 418, 433, 449,
465, 481, 497, 514, 531, 548, 565, 582,
600, 618, 636, 654, 673, 691, 710, 729,
749, 768, 788, 808, 828, 848, 869, 889,
910, 931, 952, 974, 995, 1017, 1039, 1060,
1083, 1105, 1127, 1150, 1172, 1195, 1218, 1241,
1264, 1288, 1311, 1334, 1358, 1382, 1406, 1429,
1453, 1478, 1502, 1526, 1550, 1575, 1599, 1624,
1648, 1673, 1698, 1723, 1747, 1772, 1797, 1822,
1847, 1872, 1897, 1922, 1948, 1973, 1998, 2023
};
const PROGMEM uint16_t DACLookup_FullSine_8Bit[256] =
{
2048, 2098, 2148, 2198, 2248, 2298, 2348, 2398,
2447, 2496, 2545, 2594, 2642, 2690, 2737, 2784,
2831, 2877, 2923, 2968, 3013, 3057, 3100, 3143,
3185, 3226, 3267, 3307, 3346, 3385, 3423, 3459,
3495, 3530, 3565, 3598, 3630, 3662, 3692, 3722,
3750, 3777, 3804, 3829, 3853, 3876, 3898, 3919,
3939, 3958, 3975, 3992, 4007, 4021, 4034, 4045,
4056, 4065, 4073, 4080, 4085, 4089, 4093, 4094,
4095, 4094, 4093, 4089, 4085, 4080, 4073, 4065,
4056, 4045, 4034, 4021, 4007, 3992, 3975, 3958,
3939, 3919, 3898, 3876, 3853, 3829, 3804, 3777,
3750, 3722, 3692, 3662, 3630, 3598, 3565, 3530,
3495, 3459, 3423, 3385, 3346, 3307, 3267, 3226,
3185, 3143, 3100, 3057, 3013, 2968, 2923, 2877,
2831, 2784, 2737, 2690, 2642, 2594, 2545, 2496,
2447, 2398, 2348, 2298, 2248, 2198, 2148, 2098,
2048, 1997, 1947, 1897, 1847, 1797, 1747, 1697,
1648, 1599, 1550, 1501, 1453, 1405, 1358, 1311,
1264, 1218, 1172, 1127, 1082, 1038, 995, 952,
910, 869, 828, 788, 749, 710, 672, 636,
600, 565, 530, 497, 465, 433, 403, 373,
345, 318, 291, 266, 242, 219, 197, 176,
156, 137, 120, 103, 88, 74, 61, 50,
39, 30, 22, 15, 10, 6, 2, 1,
0, 1, 2, 6, 10, 15, 22, 30,
39, 50, 61, 74, 88, 103, 120, 137,
156, 176, 197, 219, 242, 266, 291, 318,
345, 373, 403, 433, 465, 497, 530, 565,
600, 636, 672, 710, 749, 788, 828, 869,
910, 952, 995, 1038, 1082, 1127, 1172, 1218,
1264, 1311, 1358, 1405, 1453, 1501, 1550, 1599,
1648, 1697, 1747, 1797, 1847, 1897, 1947, 1997
};
const PROGMEM uint16_t DACLookup_FullSine_7Bit[128] =
{
2048, 2148, 2248, 2348, 2447, 2545, 2642, 2737,
2831, 2923, 3013, 3100, 3185, 3267, 3346, 3423,
3495, 3565, 3630, 3692, 3750, 3804, 3853, 3898,
3939, 3975, 4007, 4034, 4056, 4073, 4085, 4093,
4095, 4093, 4085, 4073, 4056, 4034, 4007, 3975,
3939, 3898, 3853, 3804, 3750, 3692, 3630, 3565,
3495, 3423, 3346, 3267, 3185, 3100, 3013, 2923,
2831, 2737, 2642, 2545, 2447, 2348, 2248, 2148,
2048, 1947, 1847, 1747, 1648, 1550, 1453, 1358,
1264, 1172, 1082, 995, 910, 828, 749, 672,
600, 530, 465, 403, 345, 291, 242, 197,
156, 120, 88, 61, 39, 22, 10, 2,
0, 2, 10, 22, 39, 61, 88, 120,
156, 197, 242, 291, 345, 403, 465, 530,
600, 672, 749, 828, 910, 995, 1082, 1172,
1264, 1358, 1453, 1550, 1648, 1747, 1847, 1947
};
const PROGMEM uint16_t DACLookup_FullSine_6Bit[64] =
{
2048, 2248, 2447, 2642, 2831, 3013, 3185, 3346,
3495, 3630, 3750, 3853, 3939, 4007, 4056, 4085,
4095, 4085, 4056, 4007, 3939, 3853, 3750, 3630,
3495, 3346, 3185, 3013, 2831, 2642, 2447, 2248,
2048, 1847, 1648, 1453, 1264, 1082, 910, 749,
600, 465, 345, 242, 156, 88, 39, 10,
0, 10, 39, 88, 156, 242, 345, 465,
600, 749, 910, 1082, 1264, 1453, 1648, 1847
};
const PROGMEM uint16_t DACLookup_FullSine_5Bit[32] =
{
2048, 2447, 2831, 3185, 3495, 3750, 3939, 4056,
4095, 4056, 3939, 3750, 3495, 3185, 2831, 2447,
2048, 1648, 1264, 910, 600, 345, 156, 39,
0, 39, 156, 345, 600, 910, 1264, 1648
};
void setup(void) {
Serial.begin(9600);
Serial.println("Hello!");
// For Adafruit MCP4725A1 the address is 0x62 (default) or 0x63 (ADDR pin tied to VCC)
// For MCP4725A0 the address is 0x60 or 0x61
// For MCP4725A2 the address is 0x64 or 0x65
dac.begin(0x63);
Serial.println("Generating a sine wave");
}
void loop(void) {
uint16_t i;
// Push out the right lookup table, depending on the selected resolution
#if DAC_RESOLUTION == 5
for (i = 0; i < 32; i++)
{
dac.setVoltage(pgm_read_word(&(DACLookup_FullSine_5Bit[i])), false);
}
#elif DAC_RESOLUTION == 6
for (i = 0; i < 64; i++)
{
dac.setVoltage(pgm_read_word(&(DACLookup_FullSine_6Bit[i])), false);
}
#elif DAC_RESOLUTION == 7
for (i = 0; i < 128; i++)
{
dac.setVoltage(pgm_read_word(&(DACLookup_FullSine_7Bit[i])), false);
}
#elif DAC_RESOLUTION == 9
for (i = 0; i < 512; i++)
{
dac.setVoltage(pgm_read_word(&(DACLookup_FullSine_9Bit[i])), false);
}
#else // Use 8-bit data if nothing else is specified
for (i = 0; i < 256; i++)
{
dac.setVoltage(pgm_read_word(&(DACLookup_FullSine_8Bit[i])), false);
}
#endif
}
Kindly let me know how can i combine the two codes.
Code 1 is for DAC1 and address is 0x62 and code 2 is for DAC 2 and address is 0x63.
I would like to run it as one code and flash on my arduino to see both the waveforms at a same time in Channel 1 and channel 2 of my oscilloscope
Thanks a lot !!
There are many ways to post code here. One easy way:
Use the "autoformat" tool in the IDE.
Then use the "copy for forum" tool in the IDE, then paste the code here.
Same steps for both sketches.
As is, many are reluctant to look closely, as the code can get mangled when you don't post it right, which might alter its meaning but certainly makes it hard(er) to read.
Did you take the google trip on combining sketches? There's some lifting to do and it can get heavy, only way to know is to start trying.
You will almost certainly become more familiar with both sketches in your efforts to make them one. That is a good thing.
a7
Here pasting the 2 codes as requested. Kindly find them below and can you please help me in combining the codes
CODE 1:
/**************************************************************************/
/*!
@file sinewave.pde
@author Adafruit Industries
@license BSD (see license.txt)
This example will generate a sine wave with the MCP4725 DAC.
This is an example sketch for the Adafruit MCP4725 breakout board
----> http://www.adafruit.com/products/935
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
*/
/**************************************************************************/
#include <Wire.h>
#include <Adafruit_MCP4725.h>
Adafruit_MCP4725 dac;
// Set this value to 9, 8, 7, 6 or 5 to adjust the resolution
#define DAC_RESOLUTION (8)
/* Note: If flash space is tight a quarter sine wave is enough
to generate full sine and cos waves, but some additional
calculation will be required at each step after the first
quarter wave. */
const PROGMEM uint16_t DACLookup_FullSine_9Bit[512] =
{
2048, 2073, 2098, 2123, 2148, 2174, 2199, 2224,
2249, 2274, 2299, 2324, 2349, 2373, 2398, 2423,
2448, 2472, 2497, 2521, 2546, 2570, 2594, 2618,
2643, 2667, 2690, 2714, 2738, 2762, 2785, 2808,
2832, 2855, 2878, 2901, 2924, 2946, 2969, 2991,
3013, 3036, 3057, 3079, 3101, 3122, 3144, 3165,
3186, 3207, 3227, 3248, 3268, 3288, 3308, 3328,
3347, 3367, 3386, 3405, 3423, 3442, 3460, 3478,
3496, 3514, 3531, 3548, 3565, 3582, 3599, 3615,
3631, 3647, 3663, 3678, 3693, 3708, 3722, 3737,
3751, 3765, 3778, 3792, 3805, 3817, 3830, 3842,
3854, 3866, 3877, 3888, 3899, 3910, 3920, 3930,
3940, 3950, 3959, 3968, 3976, 3985, 3993, 4000,
4008, 4015, 4022, 4028, 4035, 4041, 4046, 4052,
4057, 4061, 4066, 4070, 4074, 4077, 4081, 4084,
4086, 4088, 4090, 4092, 4094, 4095, 4095, 4095,
4095, 4095, 4095, 4095, 4094, 4092, 4090, 4088,
4086, 4084, 4081, 4077, 4074, 4070, 4066, 4061,
4057, 4052, 4046, 4041, 4035, 4028, 4022, 4015,
4008, 4000, 3993, 3985, 3976, 3968, 3959, 3950,
3940, 3930, 3920, 3910, 3899, 3888, 3877, 3866,
3854, 3842, 3830, 3817, 3805, 3792, 3778, 3765,
3751, 3737, 3722, 3708, 3693, 3678, 3663, 3647,
3631, 3615, 3599, 3582, 3565, 3548, 3531, 3514,
3496, 3478, 3460, 3442, 3423, 3405, 3386, 3367,
3347, 3328, 3308, 3288, 3268, 3248, 3227, 3207,
3186, 3165, 3144, 3122, 3101, 3079, 3057, 3036,
3013, 2991, 2969, 2946, 2924, 2901, 2878, 2855,
2832, 2808, 2785, 2762, 2738, 2714, 2690, 2667,
2643, 2618, 2594, 2570, 2546, 2521, 2497, 2472,
2448, 2423, 2398, 2373, 2349, 2324, 2299, 2274,
2249, 2224, 2199, 2174, 2148, 2123, 2098, 2073,
2048, 2023, 1998, 1973, 1948, 1922, 1897, 1872,
1847, 1822, 1797, 1772, 1747, 1723, 1698, 1673,
1648, 1624, 1599, 1575, 1550, 1526, 1502, 1478,
1453, 1429, 1406, 1382, 1358, 1334, 1311, 1288,
1264, 1241, 1218, 1195, 1172, 1150, 1127, 1105,
1083, 1060, 1039, 1017, 995, 974, 952, 931,
910, 889, 869, 848, 828, 808, 788, 768,
749, 729, 710, 691, 673, 654, 636, 618,
600, 582, 565, 548, 531, 514, 497, 481,
465, 449, 433, 418, 403, 388, 374, 359,
345, 331, 318, 304, 291, 279, 266, 254,
242, 230, 219, 208, 197, 186, 176, 166,
156, 146, 137, 128, 120, 111, 103, 96,
88, 81, 74, 68, 61, 55, 50, 44,
39, 35, 30, 26, 22, 19, 15, 12,
10, 8, 6, 4, 2, 1, 1, 0,
0, 0, 1, 1, 2, 4, 6, 8,
10, 12, 15, 19, 22, 26, 30, 35,
39, 44, 50, 55, 61, 68, 74, 81,
88, 96, 103, 111, 120, 128, 137, 146,
156, 166, 176, 186, 197, 208, 219, 230,
242, 254, 266, 279, 291, 304, 318, 331,
345, 359, 374, 388, 403, 418, 433, 449,
465, 481, 497, 514, 531, 548, 565, 582,
600, 618, 636, 654, 673, 691, 710, 729,
749, 768, 788, 808, 828, 848, 869, 889,
910, 931, 952, 974, 995, 1017, 1039, 1060,
1083, 1105, 1127, 1150, 1172, 1195, 1218, 1241,
1264, 1288, 1311, 1334, 1358, 1382, 1406, 1429,
1453, 1478, 1502, 1526, 1550, 1575, 1599, 1624,
1648, 1673, 1698, 1723, 1747, 1772, 1797, 1822,
1847, 1872, 1897, 1922, 1948, 1973, 1998, 2023
};
const PROGMEM uint16_t DACLookup_FullSine_8Bit[256] =
{
2048, 2098, 2148, 2198, 2248, 2298, 2348, 2398,
2447, 2496, 2545, 2594, 2642, 2690, 2737, 2784,
2831, 2877, 2923, 2968, 3013, 3057, 3100, 3143,
3185, 3226, 3267, 3307, 3346, 3385, 3423, 3459,
3495, 3530, 3565, 3598, 3630, 3662, 3692, 3722,
3750, 3777, 3804, 3829, 3853, 3876, 3898, 3919,
3939, 3958, 3975, 3992, 4007, 4021, 4034, 4045,
4056, 4065, 4073, 4080, 4085, 4089, 4093, 4094,
4095, 4094, 4093, 4089, 4085, 4080, 4073, 4065,
4056, 4045, 4034, 4021, 4007, 3992, 3975, 3958,
3939, 3919, 3898, 3876, 3853, 3829, 3804, 3777,
3750, 3722, 3692, 3662, 3630, 3598, 3565, 3530,
3495, 3459, 3423, 3385, 3346, 3307, 3267, 3226,
3185, 3143, 3100, 3057, 3013, 2968, 2923, 2877,
2831, 2784, 2737, 2690, 2642, 2594, 2545, 2496,
2447, 2398, 2348, 2298, 2248, 2198, 2148, 2098,
2048, 1997, 1947, 1897, 1847, 1797, 1747, 1697,
1648, 1599, 1550, 1501, 1453, 1405, 1358, 1311,
1264, 1218, 1172, 1127, 1082, 1038, 995, 952,
910, 869, 828, 788, 749, 710, 672, 636,
600, 565, 530, 497, 465, 433, 403, 373,
345, 318, 291, 266, 242, 219, 197, 176,
156, 137, 120, 103, 88, 74, 61, 50,
39, 30, 22, 15, 10, 6, 2, 1,
0, 1, 2, 6, 10, 15, 22, 30,
39, 50, 61, 74, 88, 103, 120, 137,
156, 176, 197, 219, 242, 266, 291, 318,
345, 373, 403, 433, 465, 497, 530, 565,
600, 636, 672, 710, 749, 788, 828, 869,
910, 952, 995, 1038, 1082, 1127, 1172, 1218,
1264, 1311, 1358, 1405, 1453, 1501, 1550, 1599,
1648, 1697, 1747, 1797, 1847, 1897, 1947, 1997
};
const PROGMEM uint16_t DACLookup_FullSine_7Bit[128] =
{
2048, 2148, 2248, 2348, 2447, 2545, 2642, 2737,
2831, 2923, 3013, 3100, 3185, 3267, 3346, 3423,
3495, 3565, 3630, 3692, 3750, 3804, 3853, 3898,
3939, 3975, 4007, 4034, 4056, 4073, 4085, 4093,
4095, 4093, 4085, 4073, 4056, 4034, 4007, 3975,
3939, 3898, 3853, 3804, 3750, 3692, 3630, 3565,
3495, 3423, 3346, 3267, 3185, 3100, 3013, 2923,
2831, 2737, 2642, 2545, 2447, 2348, 2248, 2148,
2048, 1947, 1847, 1747, 1648, 1550, 1453, 1358,
1264, 1172, 1082, 995, 910, 828, 749, 672,
600, 530, 465, 403, 345, 291, 242, 197,
156, 120, 88, 61, 39, 22, 10, 2,
0, 2, 10, 22, 39, 61, 88, 120,
156, 197, 242, 291, 345, 403, 465, 530,
600, 672, 749, 828, 910, 995, 1082, 1172,
1264, 1358, 1453, 1550, 1648, 1747, 1847, 1947
};
const PROGMEM uint16_t DACLookup_FullSine_6Bit[64] =
{
2048, 2248, 2447, 2642, 2831, 3013, 3185, 3346,
3495, 3630, 3750, 3853, 3939, 4007, 4056, 4085,
4095, 4085, 4056, 4007, 3939, 3853, 3750, 3630,
3495, 3346, 3185, 3013, 2831, 2642, 2447, 2248,
2048, 1847, 1648, 1453, 1264, 1082, 910, 749,
600, 465, 345, 242, 156, 88, 39, 10,
0, 10, 39, 88, 156, 242, 345, 465,
600, 749, 910, 1082, 1264, 1453, 1648, 1847
};
const PROGMEM uint16_t DACLookup_FullSine_5Bit[32] =
{
2048, 2447, 2831, 3185, 3495, 3750, 3939, 4056,
4095, 4056, 3939, 3750, 3495, 3185, 2831, 2447,
2048, 1648, 1264, 910, 600, 345, 156, 39,
0, 39, 156, 345, 600, 910, 1264, 1648
};
void setup(void) {
Serial.begin(9600);
Serial.println("Hello!");
// For Adafruit MCP4725A1 the address is 0x62 (default) or 0x63 (ADDR pin tied to VCC)
// For MCP4725A0 the address is 0x60 or 0x61
// For MCP4725A2 the address is 0x64 or 0x65
dac.begin(0x62);
Serial.println("Generating a sine wave");
}
void loop(void) {
uint16_t i;
// Push out the right lookup table, depending on the selected resolution
#if DAC_RESOLUTION == 5
for (i = 0; i < 32; i++)
{
dac.setVoltage(pgm_read_word(&(DACLookup_FullSine_5Bit[i])), false);
}
#elif DAC_RESOLUTION == 6
for (i = 0; i < 64; i++)
{
dac.setVoltage(pgm_read_word(&(DACLookup_FullSine_6Bit[i])), false);
}
#elif DAC_RESOLUTION == 7
for (i = 0; i < 128; i++)
{
dac.setVoltage(pgm_read_word(&(DACLookup_FullSine_7Bit[i])), false);
}
#elif DAC_RESOLUTION == 9
for (i = 0; i < 512; i++)
{
dac.setVoltage(pgm_read_word(&(DACLookup_FullSine_9Bit[i])), false);
}
#else // Use 8-bit data if nothing else is specified
for (i = 0; i < 256; i++)
{
dac.setVoltage(pgm_read_word(&(DACLookup_FullSine_8Bit[i])), false);
}
#endif
}CODE 2 :
/**************************************************************************/
/*!
@file trianglewave.pde
@author Adafruit Industries
@license BSD (see license.txt)
This example will generate a triangle wave with the MCP4725 DAC.
This is an example sketch for the Adafruit MCP4725 breakout board
----> http://www.adafruit.com/products/935
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
*/
/**************************************************************************/
#include <Wire.h>
#include <Adafruit_MCP4725.h>
Adafruit_MCP4725 dac;
void setup(void) {
Serial.begin(9600);
Serial.println("Hello!");
// For Adafruit MCP4725A1 the address is 0x62 (default) or 0x63 (ADDR pin tied to VCC)
// For MCP4725A0 the address is 0x60 or 0x61
// For MCP4725A2 the address is 0x64 or 0x65
dac.begin(0x62);
Serial.println("Generating a triangle wave");
}
void loop(void) {
uint32_t counter;
// Run through the full 12-bit scale for a triangle wave
for (counter = 0; counter < 4095; counter++)
{
dac.setVoltage(counter, false);
}
for (counter = 4095; counter > 0; counter--)
{
dac.setVoltage(counter, false);
}
}OK THX.
I'm looking through the little window now.
The first thing is to make two dac objects, one for each channel.
That's just renaming dac and using the alternate address in you second sketch.
Both your loop()s run flat out, that is to say they put values out to the DAC as fast as humanely possible.
But they both use for loops, which block the loop.
You must rewrite the loop() function so that each time it is called, it takes one step, one step which was formerly one of the many that the for loop managed.
So you need you own variable and code to increment, test or decrement to make it act like a for loop when executed over and over.
Do that for both sketches - both DACs will be fed the next step in what was once a for loop every time the loop function is called.
Your loop() will have no for or while statements, just if statements that control the progress of what are now your hand-made "loops".
a7
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