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@ -1,3 +1,14 @@
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/**
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* @file main.cpp
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* @brief Program entry point.
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*
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* Copyright (C) 2020 Clyne Sullivan
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*
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* Distributed under the GNU GPL v3 or later. You should have received a copy of
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* the GNU General Public License along with this program.
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* If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "ch.h"
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#include "hal.h"
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@ -5,12 +16,15 @@
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#include "dac.hpp"
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#include "usbserial.hpp"
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#include <array>
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#if CACHE_LINE_SIZE > 0
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CC_ALIGN(CACHE_LINE_SIZE)
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#endif
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adcsample_t samples[CACHE_SIZE_ALIGN(adcsample_t, 10)];
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static std::array<adcsample_t, CACHE_SIZE_ALIGN(adcsample_t, 100)> adc_samples;
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int main(void) {
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int main()
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{
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halInit();
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chSysInit();
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@ -32,21 +46,22 @@ int main(void) {
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while (true) {
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if (usbd.active()) {
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if (char c; usbd.read(&c) > 0 && c == 's') {
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adc.getSamples(samples, 10);
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for (int i = 0; i < 10; i++) {
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uint8_t str[5] = {
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static_cast<uint8_t>(samples[i] / 1000 % 10 + '0'),
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static_cast<uint8_t>(samples[i] / 100 % 10 + '0'),
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static_cast<uint8_t>(samples[i] / 10 % 10 + '0'),
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static_cast<uint8_t>(samples[i] % 10 + '0'),
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' '
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};
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usbd.write(str, 5);
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// Expect to receive a byte command 'packet'.
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if (char cmd; usbd.read(&cmd) > 0) {
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switch (cmd) {
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case 'r': // Read in analog signal
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adc.getSamples(&adc_samples[0], adc_samples.size());
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usbd.write(adc_samples.data(), adc_samples.size());
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break;
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case 'i': // Identify ourself as an stmdsp device
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usbd.write("stmdsp", 6);
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break;
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default:
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break;
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}
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usbd.write("\r\n", 2);
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}
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}
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chThdSleepMilliseconds(250);
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}
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}
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