158 lines
5.1 KiB
C
158 lines
5.1 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
|
|
};
|
|
|
|
/*
|
|
* DAC streaming callback.
|
|
*/
|
|
size_t nx = 0, ny = 0, nz = 0;
|
|
static void end_cb1(DACDriver *dacp, const dacsample_t *buffer, size_t n) {
|
|
|
|
(void)dacp;
|
|
|
|
nz++;
|
|
if (dac_buffer == buffer) {
|
|
nx += n;
|
|
}
|
|
else {
|
|
ny += n;
|
|
}
|
|
|
|
if ((nz % 1000) == 0) {
|
|
palTogglePad(GPIOD, GPIOD_LED3);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* DAC error callback.
|
|
*/
|
|
static void error_cb1(DACDriver *dacp, dacerror_t err) {
|
|
|
|
(void)dacp;
|
|
(void)err;
|
|
|
|
chSysHalt("DAC failure");
|
|
}
|
|
|
|
static const DACConfig dac1cfg1 = {
|
|
init: 2047U,
|
|
datamode: DAC_DHRM_12BIT_RIGHT
|
|
};
|
|
|
|
static const DACConversionGroup dacgrpcfg1 = {
|
|
num_channels: 1U,
|
|
end_cb: end_cb1,
|
|
error_cb: error_cb1,
|
|
trigger: DAC_TRG(0)
|
|
};
|
|
|
|
/*
|
|
* GPT6 configuration.
|
|
*/
|
|
static const GPTConfig gpt6cfg1 = {
|
|
frequency: 1000000U,
|
|
callback: NULL,
|
|
cr2: TIM_CR2_MMS_1, /* MMS = 010 = TRGO on Update Event. */
|
|
dier: 0U
|
|
};
|
|
|
|
/*
|
|
* Application entry point.
|
|
*/
|
|
int main(void) {
|
|
|
|
/*
|
|
* System initializations.
|
|
* - HAL initialization, this also initializes the configured device drivers
|
|
* and performs the board-specific initializations.
|
|
* - Kernel initialization, the main() function becomes a thread and the
|
|
* RTOS is active.
|
|
*/
|
|
halInit();
|
|
chSysInit();
|
|
|
|
/*
|
|
* Starting DAC1 driver, setting up the output pin as analog as suggested
|
|
* by the Reference Manual.
|
|
*/
|
|
palSetPadMode(GPIOA, 4, PAL_MODE_INPUT_ANALOG);
|
|
dacStart(&DACD1, &dac1cfg1);
|
|
|
|
/*
|
|
* Starting GPT6 driver, it is used for triggering the DAC.
|
|
*/
|
|
gptStart(&GPTD6, &gpt6cfg1);
|
|
|
|
/*
|
|
* Starting a continuous conversion.
|
|
*/
|
|
dacStartConversion(&DACD1, &dacgrpcfg1, dac_buffer, DAC_BUFFER_SIZE);
|
|
gptStartContinuous(&GPTD6, 2U);
|
|
|
|
/*
|
|
* Normal main() thread activity, if the button is pressed then the DAC
|
|
* transfer is stopped.
|
|
*/
|
|
while (true) {
|
|
if (palReadPad(GPIOA, GPIOA_BUTTON)) {
|
|
gptStopTimer(&GPTD6);
|
|
dacStopConversion(&DACD1);
|
|
}
|
|
chThdSleepMilliseconds(500);
|
|
}
|
|
return 0;
|
|
}
|