146 lines
4.7 KiB
C
146 lines
4.7 KiB
C
/*
|
|
ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
#include "ch.h"
|
|
#include "hal.h"
|
|
|
|
#define DAC_BUFFER_SIZE 360
|
|
|
|
/*
|
|
* DAC test buffer (sine wave).
|
|
*/
|
|
static const dacsample_t dac_buffer[DAC_BUFFER_SIZE] = {
|
|
2047, 2082, 2118, 2154, 2189, 2225, 2260, 2296, 2331, 2367, 2402, 2437,
|
|
2472, 2507, 2542, 2576, 2611, 2645, 2679, 2713, 2747, 2780, 2813, 2846,
|
|
2879, 2912, 2944, 2976, 3008, 3039, 3070, 3101, 3131, 3161, 3191, 3221,
|
|
3250, 3278, 3307, 3335, 3362, 3389, 3416, 3443, 3468, 3494, 3519, 3544,
|
|
3568, 3591, 3615, 3637, 3660, 3681, 3703, 3723, 3744, 3763, 3782, 3801,
|
|
3819, 3837, 3854, 3870, 3886, 3902, 3917, 3931, 3944, 3958, 3970, 3982,
|
|
3993, 4004, 4014, 4024, 4033, 4041, 4049, 4056, 4062, 4068, 4074, 4078,
|
|
4082, 4086, 4089, 4091, 4092, 4093, 4094, 4093, 4092, 4091, 4089, 4086,
|
|
4082, 4078, 4074, 4068, 4062, 4056, 4049, 4041, 4033, 4024, 4014, 4004,
|
|
3993, 3982, 3970, 3958, 3944, 3931, 3917, 3902, 3886, 3870, 3854, 3837,
|
|
3819, 3801, 3782, 3763, 3744, 3723, 3703, 3681, 3660, 3637, 3615, 3591,
|
|
3568, 3544, 3519, 3494, 3468, 3443, 3416, 3389, 3362, 3335, 3307, 3278,
|
|
3250, 3221, 3191, 3161, 3131, 3101, 3070, 3039, 3008, 2976, 2944, 2912,
|
|
2879, 2846, 2813, 2780, 2747, 2713, 2679, 2645, 2611, 2576, 2542, 2507,
|
|
2472, 2437, 2402, 2367, 2331, 2296, 2260, 2225, 2189, 2154, 2118, 2082,
|
|
2047, 2012, 1976, 1940, 1905, 1869, 1834, 1798, 1763, 1727, 1692, 1657,
|
|
1622, 1587, 1552, 1518, 1483, 1449, 1415, 1381, 1347, 1314, 1281, 1248,
|
|
1215, 1182, 1150, 1118, 1086, 1055, 1024, 993, 963, 933, 903, 873,
|
|
844, 816, 787, 759, 732, 705, 678, 651, 626, 600, 575, 550,
|
|
526, 503, 479, 457, 434, 413, 391, 371, 350, 331, 312, 293,
|
|
275, 257, 240, 224, 208, 192, 177, 163, 150, 136, 124, 112,
|
|
101, 90, 80, 70, 61, 53, 45, 38, 32, 26, 20, 16,
|
|
12, 8, 5, 3, 2, 1, 0, 1, 2, 3, 5, 8,
|
|
12, 16, 20, 26, 32, 38, 45, 53, 61, 70, 80, 90,
|
|
101, 112, 124, 136, 150, 163, 177, 192, 208, 224, 240, 257,
|
|
275, 293, 312, 331, 350, 371, 391, 413, 434, 457, 479, 503,
|
|
526, 550, 575, 600, 626, 651, 678, 705, 732, 759, 787, 816,
|
|
844, 873, 903, 933, 963, 993, 1024, 1055, 1086, 1118, 1150, 1182,
|
|
1215, 1248, 1281, 1314, 1347, 1381, 1415, 1449, 1483, 1518, 1552, 1587,
|
|
1622, 1657, 1692, 1727, 1763, 1798, 1834, 1869, 1905, 1940, 1976, 2012
|
|
};
|
|
|
|
static const DACConfig dac1cfg1 = {
|
|
.init = 2047U,
|
|
.datamode = DAC_DHRM_12BIT_RIGHT,
|
|
.cr = 0
|
|
};
|
|
|
|
static const DACConversionGroup dacgrpcfg1 = {
|
|
.num_channels = 1U,
|
|
.end_cb = NULL,
|
|
.error_cb = NULL,
|
|
.trigger = DAC_TRG(0)
|
|
};
|
|
|
|
/*
|
|
* GPT6 configuration.
|
|
*/
|
|
static const GPTConfig gpt6cfg1 = {
|
|
.frequency = 10000U,
|
|
.callback = NULL,
|
|
.cr2 = TIM_CR2_MMS_1, /* MMS = 010 = TRGO on Update Event. */
|
|
.dier = 0U
|
|
};
|
|
|
|
void comp2_cb(COMPDriver *comp) {
|
|
|
|
/* Check if output is high (rising) */
|
|
if (comp->reg->CSR & COMP_CSR_COMPxOUT) {
|
|
|
|
palToggleLine(LINE_LED9_BLUE);
|
|
}
|
|
|
|
}
|
|
|
|
static const COMPConfig comp2_conf = {
|
|
COMP_OUTPUT_NORMAL,
|
|
COMP_IRQ_RISING,
|
|
comp2_cb,
|
|
STM32_COMP_InvertingInput_VREFINT |
|
|
STM32_COMP_NonInvertingInput_IO2 |
|
|
STM32_COMP_Hysteresis_High // CSR
|
|
};
|
|
|
|
/*
|
|
* Application entry point.
|
|
*/
|
|
int main(void) {
|
|
|
|
halInit();
|
|
chSysInit();
|
|
|
|
/*
|
|
* Set PA3 - PA4 to Analog (DAC1_CH1, COMP2_INP)
|
|
* You will have to connect these with a jumper wire
|
|
*/
|
|
palSetPadMode(GPIOA, 3, PAL_MODE_INPUT_ANALOG);
|
|
palSetPadMode(GPIOA, 4, PAL_MODE_INPUT_ANALOG);
|
|
|
|
/*
|
|
* Set PA2 to alternate 8 (COMP2_OUT)
|
|
* You can connect this to an oscilloscope along with PA4 to compare input/output.
|
|
*/
|
|
palSetPadMode(GPIOA, 2, PAL_MODE_ALTERNATE(8));
|
|
|
|
/*
|
|
* Start peripherals
|
|
*/
|
|
dacStart(&DACD1, &dac1cfg1);
|
|
compStart(&COMPD2, &comp2_conf);
|
|
gptStart(&GPTD6, &gpt6cfg1);
|
|
|
|
/*
|
|
* Starting a continuous conversion.
|
|
*/
|
|
dacStartConversion(&DACD1, &dacgrpcfg1, dac_buffer, DAC_BUFFER_SIZE);
|
|
gptStartContinuous(&GPTD6, 2U);
|
|
|
|
compEnable(&COMPD2);
|
|
|
|
/*
|
|
* Normal main() thread activity.
|
|
*/
|
|
while (true) {
|
|
|
|
chThdSleepMilliseconds(250);
|
|
palToggleLine(LINE_LED3_RED);
|
|
}
|
|
return 0;
|
|
}
|