134 lines
2.9 KiB
C
134 lines
2.9 KiB
C
/**
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* Lets imagine that we have board with LIS3LV02DL accelerometer on channel #1
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* and MAX1236 ADC, TMP75 thermometer on channel #2.
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*
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* NOTE: I assume, that you have datasheets on all this stuff.
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*
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* NOTE: Also, I assume, that you know how to I2C works.
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*
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* In order from simplicity to complexity:
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* TMP75
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* MAX1236
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* LIS3LV02DL
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*
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* Project splitted to separate source files for each device.
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*
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* Data from sensors we will be read from different thread sleeping different
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* amount of time.
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*/
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#include <stdlib.h>
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#include "ch.h"
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#include "hal.h"
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#include "i2c_pns.h"
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#include "lis3.h"
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#include "tmp75.h"
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#include "fake.h"
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/*
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* Red LEDs blinker thread, times are in milliseconds.
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*/
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static WORKING_AREA(BlinkWA, 128);
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static msg_t Blink(void *arg) {
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(void)arg;
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while (TRUE) {
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palClearPad(IOPORT3, GPIOC_LED);
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chThdSleepMilliseconds(500);
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palSetPad(IOPORT3, GPIOC_LED);
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chThdSleepMilliseconds(500);
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}
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return 0;
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}
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/*
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* Accelerometer thread
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*/
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static WORKING_AREA(PollAccelThreadWA, 128);
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static msg_t PollAccelThread(void *arg) {
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chRegSetThreadName("PollAccel");
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(void)arg;
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while (TRUE) {
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// chThdSleepMilliseconds(rand() & 31);
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chThdSleepMilliseconds(32);
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request_acceleration_data();
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}
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return 0;
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}
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/* Temperature polling thread */
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static WORKING_AREA(PollTmp75ThreadWA, 128);
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static msg_t PollTmp75Thread(void *arg) {
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chRegSetThreadName("PollTmp75");
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(void)arg;
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while (TRUE) {
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// chThdSleepMilliseconds(rand() & 31);
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chThdSleepMilliseconds(15);
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/* Call reading function */
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request_temperature();
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}
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return 0;
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}
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/* Temperature polling thread */
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static WORKING_AREA(PollFakeThreadWA, 128);
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static msg_t PollFakeThread(void *arg) {
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chRegSetThreadName("PollFake");
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(void)arg;
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while (TRUE) {
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chThdSleepMilliseconds(16);
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/* Call reading function */
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request_fake();
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}
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return 0;
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}
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/*
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* Entry point, note, the main() function is already a thread in the system
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* on entry.
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*/
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int main(void) {
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halInit();
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chSysInit();
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chThdSleepMilliseconds(200);
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I2CInit_pns();
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/* Create accelerometer thread */
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chThdCreateStatic(PollAccelThreadWA,
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sizeof(PollAccelThreadWA),
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NORMALPRIO,
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PollAccelThread,
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NULL);
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/* Create temperature thread */
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chThdCreateStatic(PollTmp75ThreadWA,
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sizeof(PollTmp75ThreadWA),
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NORMALPRIO,
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PollTmp75Thread,
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NULL);
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/* Create not responding thread */
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chThdCreateStatic(PollFakeThreadWA,
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sizeof(PollFakeThreadWA),
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NORMALPRIO,
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PollFakeThread,
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NULL);
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/* Creates the blinker thread. */
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chThdCreateStatic(BlinkWA, sizeof(BlinkWA), HIGHPRIO, Blink, NULL);
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/* main loop that do nothing */
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while (TRUE) {
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chThdSleepMilliseconds(500);
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}
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return 0;
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}
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