125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2013 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 <stdlib.h>
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#include "ch.h"
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#include "hal.h"
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#include "chprintf.h"
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BaseSequentialStream * chp = (BaseSequentialStream *)&SD1;
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/* buffers depth */
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#define EEPROM_RX_DEPTH 10
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#define EEPROM_TX_DEPTH 12
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#define EEPROM_WR_ADRESS_H 0x00
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#define EEPROM_WR_ADRESS_L 0x00
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#define EEPROM_RD_ADRESS_H 0x00
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#define EEPROM_RD_ADRESS_L 0x00
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static uint8_t rxbuf[EEPROM_RX_DEPTH];
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static uint8_t txbuf[EEPROM_TX_DEPTH];
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static i2cflags_t errors = 0;
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#define EEPROM_24LC64_ADDR 0b1010000
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/* I2C interface #2 */
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static const I2CConfig i2ccfg2 = {
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I2C_FAST_MODE,
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400000
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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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msg_t status = RDY_OK;
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systime_t tmo = MS2ST(4);
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uint8_t i;
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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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* Starts I2C
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*/
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i2cStart(&I2CD2, &i2ccfg2);
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/*
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* Prepares the Serial driver 1
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*/
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sdStart(&SD1, NULL); /* Default is 38400-8-N-1.*/
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txbuf[0] = EEPROM_WR_ADRESS_H; /* register address */
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txbuf[1] = EEPROM_WR_ADRESS_L;
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for (i = 2; i < EEPROM_TX_DEPTH; i++)
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txbuf[i] = i - 2;
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i2cAcquireBus(&I2CD2);
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status = i2cMasterTransmitTimeout(&I2CD2, EEPROM_24LC64_ADDR, txbuf, EEPROM_TX_DEPTH, rxbuf, 0, tmo);
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i2cReleaseBus(&I2CD2);
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if (status != RDY_OK){
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errors = i2cGetErrors(&I2CD2);
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chprintf(chp, "EEPROM write error code: %d\n\r", errors);
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}
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else {
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chprintf(chp, "\n\rEEPROM write:\t");
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for (i = 2; i < EEPROM_TX_DEPTH; i++) {
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chprintf(chp, "0x%02x ", txbuf[i]);
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}
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}
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chThdSleepMilliseconds(5);
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/* Read */
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txbuf[0] = EEPROM_RD_ADRESS_H; /* register address */
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txbuf[1] = EEPROM_RD_ADRESS_L;
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i2cAcquireBus(&I2CD2);
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status = i2cMasterTransmitTimeout(&I2CD2, EEPROM_24LC64_ADDR, txbuf, 2, rxbuf, EEPROM_RX_DEPTH, tmo);
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i2cReleaseBus(&I2CD2);
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if (status != RDY_OK) {
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errors = i2cGetErrors(&I2CD2);
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chprintf(chp, "EEPROM read error code: %d\n\r", errors);
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}
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chprintf(chp, "\n\rEEPROM read:\t ");
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for (i = 0; i < EEPROM_RX_DEPTH; i++) {
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chprintf(chp, "0x%02x ", rxbuf[i]);
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}
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/*
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* Normal main() thread activity, nothing in this test.
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*/
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while (TRUE) {
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palTogglePad(GPIO0, GPIO0_LED2_RED);
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chThdSleepMilliseconds(100);
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}
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}
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