143 lines
4.0 KiB
C
143 lines
4.0 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 <stdio.h>
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#include <string.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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#define LED_GREEN_PIN 25U
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#define I2C0_SDA_PIN 12U
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#define I2C0_SCL_PIN 13U
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// This is I2C0
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#define I2CN I2CD1
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/*
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* Green LED blinker thread, times are in milliseconds.
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*/
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static CH_SYS_CORE0_MEMORY THD_WORKING_AREA(waThread1, 128);
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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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chThdSleepMilliseconds(500);
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palToggleLine(LED_GREEN_PIN);
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}
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}
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#define EEPROM_ADDRESS 0x50
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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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* Activates the UART0 SIO driver using the default configuration.
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*/
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sioStart(&SIOD0, NULL);
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sioStartOperation(&SIOD0, NULL);
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/* LED GPIO */
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palSetLineMode(LED_GREEN_PIN, PAL_MODE_OUTPUT_PUSHPULL | PAL_RP_PAD_DRIVE12);
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I2CConfig i2cConfig = {
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400000, // baudrate
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};
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i2cStart(&I2CN, &i2cConfig);
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/* Set up I2C pins. */
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palSetLineMode(I2C0_SDA_PIN, PAL_MODE_ALTERNATE_I2C | PAL_RP_PAD_PUE | PAL_RP_PAD_DRIVE4);
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palSetLineMode(I2C0_SCL_PIN, PAL_MODE_ALTERNATE_I2C | PAL_RP_PAD_PUE | PAL_RP_PAD_DRIVE4);
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/*
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* Creates the blinker thread.
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*/
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chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO, Thread1, NULL);
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chThdSleepMilliseconds(100);
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chprintf((BaseSequentialStream *)&SIOD0, "--\r\n");
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const uint8_t target_address = 0x00;
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// Write data
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const uint8_t initData[] = {
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target_address, // word address
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0x80, 0xFF, 0x01, 0x7F, 0xF1, 0x08, 0x0, 0x12,
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};
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msg_t msg;
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msg = i2cMasterTransmitTimeout(&I2CN, EEPROM_ADDRESS, (uint8_t*)&initData, sizeof(initData), NULL, 0, 1000);
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chprintf((BaseSequentialStream *)&SIOD0, "write: %d\r\n", msg);
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if (msg == MSG_OK) {
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uint8_t readData[10];
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memset(readData, 0xAA, 10);
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// read 4 bytes
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msg = i2cMasterTransmitTimeout(&I2CN, EEPROM_ADDRESS, (uint8_t*)&target_address, 1, (uint8_t*)&readData, 4, 1000);
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chprintf((BaseSequentialStream *)&SIOD0, "write and read: %d\r\n", msg);
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chprintf((BaseSequentialStream *)&SIOD0, "data: %d\r\n",
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readData[0] == initData[1] &&
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readData[1] == initData[2] &&
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readData[2] == initData[3] &&
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readData[3] == initData[4]);
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for (int i = 0; i < 8; i++) {
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chprintf((BaseSequentialStream *)&SIOD0, "[%d]: 0x%X\r\n", i, readData[i]);
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}
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// read next 4 bytes
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msg = i2cMasterReceiveTimeout(&I2CN, EEPROM_ADDRESS, (uint8_t*)&readData[4], 4, 1000);
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chprintf((BaseSequentialStream *)&SIOD0, "read: %d\r\n", msg);
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chprintf((BaseSequentialStream *)&SIOD0, "data: %d\r\n",
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readData[4] == initData[5] &&
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readData[5] == initData[6] &&
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readData[6] == initData[7] &&
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readData[7] == initData[8]);
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for (int i = 0; i < 10; i++) {
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chprintf((BaseSequentialStream *)&SIOD0, "[%d]: 0x%X\r\n", i, readData[i]);
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}
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if (msg = MSG_OK) {
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uint32_t error = i2cGetErrors(&I2CN);
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chprintf((BaseSequentialStream *)&SIOD0, "error: %d\r\n", error);
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}
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}
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/*
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* Normal main() thread activity, in this demo it does nothing except
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* sleeping in a loop.
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*/
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while (true) {
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chThdSleepMilliseconds(500);
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}
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}
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