158 lines
5.0 KiB
C
158 lines
5.0 KiB
C
/*
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ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include "ch.h"
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#include "hal.h"
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#define DAC_BUFFER_SIZE 360
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/*
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* DAC test buffer (sine wave).
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*/
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static const dacsample_t dac_buffer[DAC_BUFFER_SIZE] = {
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2047, 2082, 2118, 2154, 2189, 2225, 2260, 2296, 2331, 2367, 2402, 2437,
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2472, 2507, 2542, 2576, 2611, 2645, 2679, 2713, 2747, 2780, 2813, 2846,
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2879, 2912, 2944, 2976, 3008, 3039, 3070, 3101, 3131, 3161, 3191, 3221,
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3250, 3278, 3307, 3335, 3362, 3389, 3416, 3443, 3468, 3494, 3519, 3544,
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3568, 3591, 3615, 3637, 3660, 3681, 3703, 3723, 3744, 3763, 3782, 3801,
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3819, 3837, 3854, 3870, 3886, 3902, 3917, 3931, 3944, 3958, 3970, 3982,
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3993, 4004, 4014, 4024, 4033, 4041, 4049, 4056, 4062, 4068, 4074, 4078,
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4082, 4086, 4089, 4091, 4092, 4093, 4094, 4093, 4092, 4091, 4089, 4086,
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4082, 4078, 4074, 4068, 4062, 4056, 4049, 4041, 4033, 4024, 4014, 4004,
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3993, 3982, 3970, 3958, 3944, 3931, 3917, 3902, 3886, 3870, 3854, 3837,
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3819, 3801, 3782, 3763, 3744, 3723, 3703, 3681, 3660, 3637, 3615, 3591,
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3568, 3544, 3519, 3494, 3468, 3443, 3416, 3389, 3362, 3335, 3307, 3278,
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3250, 3221, 3191, 3161, 3131, 3101, 3070, 3039, 3008, 2976, 2944, 2912,
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2879, 2846, 2813, 2780, 2747, 2713, 2679, 2645, 2611, 2576, 2542, 2507,
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2472, 2437, 2402, 2367, 2331, 2296, 2260, 2225, 2189, 2154, 2118, 2082,
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2047, 2012, 1976, 1940, 1905, 1869, 1834, 1798, 1763, 1727, 1692, 1657,
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1622, 1587, 1552, 1518, 1483, 1449, 1415, 1381, 1347, 1314, 1281, 1248,
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1215, 1182, 1150, 1118, 1086, 1055, 1024, 993, 963, 933, 903, 873,
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844, 816, 787, 759, 732, 705, 678, 651, 626, 600, 575, 550,
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526, 503, 479, 457, 434, 413, 391, 371, 350, 331, 312, 293,
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275, 257, 240, 224, 208, 192, 177, 163, 150, 136, 124, 112,
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101, 90, 80, 70, 61, 53, 45, 38, 32, 26, 20, 16,
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12, 8, 5, 3, 2, 1, 0, 1, 2, 3, 5, 8,
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12, 16, 20, 26, 32, 38, 45, 53, 61, 70, 80, 90,
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101, 112, 124, 136, 150, 163, 177, 192, 208, 224, 240, 257,
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275, 293, 312, 331, 350, 371, 391, 413, 434, 457, 479, 503,
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526, 550, 575, 600, 626, 651, 678, 705, 732, 759, 787, 816,
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844, 873, 903, 933, 963, 993, 1024, 1055, 1086, 1118, 1150, 1182,
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1215, 1248, 1281, 1314, 1347, 1381, 1415, 1449, 1483, 1518, 1552, 1587,
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1622, 1657, 1692, 1727, 1763, 1798, 1834, 1869, 1905, 1940, 1976, 2012
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};
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/*
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* DAC streaming callback.
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*/
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size_t nx = 0, ny = 0, nz = 0;
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static void end_cb1(DACDriver *dacp) {
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nz++;
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if (dacIsBufferComplete(dacp)) {
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nx += DAC_BUFFER_SIZE / 2;
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}
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else {
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ny += DAC_BUFFER_SIZE / 2;
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}
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if ((nz % 1000) == 0) {
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palTogglePad(GPIOE, GPIOE_LED3_RED);
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}
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}
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/*
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* DAC error callback.
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*/
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static void error_cb1(DACDriver *dacp, dacerror_t err) {
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(void)dacp;
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(void)err;
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chSysHalt("DAC failure");
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}
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static const DACConfig dac1cfg1 = {
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.init = 2047U,
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.datamode = DAC_DHRM_12BIT_RIGHT,
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.cr = 0
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};
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static const DACConversionGroup dacgrpcfg1 = {
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.num_channels = 1U,
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.end_cb = end_cb1,
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.error_cb = error_cb1,
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.trigger = DAC_TRG(0)
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};
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/*
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* GPT6 configuration.
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*/
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static const GPTConfig gpt6cfg1 = {
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.frequency = 1000000U,
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.callback = NULL,
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.cr2 = TIM_CR2_MMS_1, /* MMS = 010 = TRGO on Update Event. */
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.dier = 0U
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};
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/*
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* Application entry point.
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*/
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int main(void) {
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/*
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* System initializations.
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* - HAL initialization, this also initializes the configured device drivers
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* and performs the board-specific initializations.
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* - Kernel initialization, the main() function becomes a thread and the
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* RTOS is active.
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*/
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halInit();
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chSysInit();
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/*
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* Starting DAC1 driver, setting up the output pin as analog as suggested
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* by the Reference Manual.
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*/
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palSetPadMode(GPIOA, 4, PAL_MODE_INPUT_ANALOG);
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dacStart(&DACD1, &dac1cfg1);
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/*
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* Starting GPT6 driver, it is used for triggering the DAC.
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*/
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gptStart(&GPTD6, &gpt6cfg1);
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/*
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* Starting a continuous conversion.
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*/
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dacStartConversion(&DACD1, &dacgrpcfg1,
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(dacsample_t *)dac_buffer, DAC_BUFFER_SIZE);
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gptStartContinuous(&GPTD6, 2U);
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/*
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* Normal main() thread activity, if the button is pressed then the DAC
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* transfer is stopped.
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*/
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while (true) {
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if (palReadPad(GPIOA, GPIOA_BUTTON)) {
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gptStopTimer(&GPTD6);
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dacStopConversion(&DACD1);
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}
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chThdSleepMilliseconds(500);
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}
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return 0;
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}
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