90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/*
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(c) 2015-2016 flabbergast <s3+flabbergast@sdfeu.org>
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Based on K20 I2C demo (c) 2015 Fabio Utzig, http://fabioutzig.com
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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 FXOS8700CQ_ADDR 0x1D
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// FXOS8700CQ internal register addresses
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#define FXOS8700CQ_STATUS 0x00
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#define FXOS8700CQ_WHOAMI 0x0D
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#define FXOS8700CQ_XYZ_DATA_CFG 0x0E
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#define FXOS8700CQ_CTRL_REG1 0x2A
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#define FXOS8700CQ_M_CTRL_REG1 0x5B
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#define FXOS8700CQ_M_CTRL_REG2 0x5C
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#define FXOS8700CQ_WHOAMI_VAL 0xC7
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static bool i2cOk = false;
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static const I2CConfig i2ccfg = {
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400000 // clock
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};
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static THD_WORKING_AREA(waThread1, 64);
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static THD_FUNCTION(Thread1, arg) {
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(void)arg;
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chRegSetThreadName("Blinker");
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while(true) {
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if(i2cOk) {
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palSetPad(GPIO_LED_RED, PIN_LED_RED); /* Off red */
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palTogglePad(GPIO_LED_GREEN, PIN_LED_GREEN); /* Blink green */
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} else {
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palSetPad(GPIO_LED_GREEN, PIN_LED_GREEN); /* Off green */
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palTogglePad(GPIO_LED_RED, PIN_LED_RED); /* Blink red */
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}
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chThdSleepMilliseconds(500);
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}
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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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uint8_t tx[1], rx[1];
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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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* Turn off the RGB LED.
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*/
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palSetPad(GPIO_LED_RED, PIN_LED_RED); /* red */
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palSetPad(GPIO_LED_GREEN, PIN_LED_GREEN); /* green */
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palSetPad(GPIO_LED_BLUE, PIN_LED_BLUE); /* blue */
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i2cStart(&I2CD1, &i2ccfg);
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chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO, Thread1, NULL);
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while (1) {
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tx[0] = FXOS8700CQ_WHOAMI;
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i2cMasterTransmitTimeout(&I2CD1, FXOS8700CQ_ADDR, tx, 1, rx, 1, TIME_INFINITE);
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i2cOk = (rx[0] == FXOS8700CQ_WHOAMI_VAL) ? true : false;
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chThdSleepMilliseconds(2000);
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}
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}
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