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/*
* iic.cpp
*
* Created on: 26.02.2022
* Author: steffen
* SPDX-FileCopyrightText: 2022 MDC Service <info@mdc-service.de>
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#include "iic.h"
/**
* I2C_read: read a register of the port expander
*
* @param slave_addr I2C slave address
* @param reg_addr register to read
* @param data result array
* @param len number of bytes to read
* @returns Value of the register.
*/
esp_err_t I2C_read(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data, uint8_t len) {
return i2c_master_write_read_device(I2C_MASTER_NUM, slave_addr, ®_addr, 1, data, 2, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
}
/**
* I2C_register_write_byte: write a byte to the port expander
*
* @param slave_addr I2C slave address
* @param reg_addr register to read
* @param data value to write
* @returns number of bytes written.
*/
esp_err_t I2C_register_write_byte(uint8_t slave_addr, uint8_t reg_addr, uint8_t data) {
uint8_t write_buf[2] = { reg_addr, data };
return i2c_master_write_to_device(I2C_MASTER_NUM, slave_addr, write_buf, sizeof(write_buf), I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
}
/**
* I2C_init: write a initalize the port expander
*
* @returns > then 0 if success, otherwise -1.
*/
esp_err_t I2C_init(void) {
int res1,res2;
int I2C_master_port = I2C_MASTER_NUM;
i2c_config_t I2C_conf = { .mode = I2C_MODE_MASTER, .sda_io_num = I2C_MASTER_SDA_IO, .scl_io_num = I2C_MASTER_SCL_IO, .sda_pullup_en = GPIO_PULLUP_ENABLE, .scl_pullup_en = GPIO_PULLUP_ENABLE, .master { .clk_speed = I2C_MASTER_FREQ_HZ, } };
i2c_param_config(I2C_master_port, &I2C_conf);
res1=i2c_driver_install(I2C_master_port, I2C_conf.mode,
I2C_MASTER_RX_BUF_DISABLE, I2C_MASTER_TX_BUF_DISABLE, 0);
I2C_buf[0] = 0x7F; // write data to output port 1
I2C_buf[1] = 0x00; // write data to output port 1
res1 = i2c_master_write_to_device(I2C_MASTER_NUM, I2C_PORTEXP1, I2C_buf, 2, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
res2 = i2c_master_write_to_device(I2C_MASTER_NUM, I2C_PORTEXP2, I2C_buf, 2, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
printf("\nMaster wrote %d %d %02X\n", res1,res2,I2C_buf[0]);
I2C_buf[0] = 0x02; // write data to output port 1
I2C_buf[1] = 0xFF; // write data to output port 1
I2C_buf[2] = 0xFF; // write data to output port 1
I2C_buf[3] = 0x00; // write data to output port 1
I2C_buf[4] = 0x00; // write data to output port 1
res1 = i2c_master_write_to_device(I2C_MASTER_NUM, I2C_PORTEXP1, I2C_buf, 5, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
res2 = i2c_master_write_to_device(I2C_MASTER_NUM, I2C_PORTEXP2, I2C_buf, 5, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
printf("\nMaster wrote %d %d %02X\n", res1,res2,I2C_buf[0]);
I2C_buf[0] = 0x11; // write data to output port 1
I2C_buf[1] = 0x10; // write data to output port 1
res1 = i2c_master_write_to_device(I2C_MASTER_NUM, I2C_PORTEXP1, I2C_buf, 2, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
res2 = i2c_master_write_to_device(I2C_MASTER_NUM, I2C_PORTEXP2, I2C_buf, 2, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
printf("\nMaster wrote %d %d %02X\n", res1,res2,I2C_buf[0]);
// printf("\nI2C wrote 0x%02X%02X: %d\n", I2C_buf[0], I2C_buf[1], res1);
// I2C_buf[0] = 0x00; // lese 3 bytes
// res2 = i2c_master_read_from_device(I2C_MASTER_NUM, I2C_PORTEXP1, I2C_buf, 1, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
/*
I2C_buf[0] = 0x8C; // write config port 0 with auto inc
I2C_buf[1] = 0xFF; // Port 0 Input
I2C_buf[2] = 0x00; // Port 1 Output
I2C_buf[3] = 0xFF; // Port 2 Input
res = i2c_master_write_to_device(I2C_MASTER_NUM, I2C_PORTEXP1, I2C_buf, 4, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
printf("\nMaster wrote %02X %02X: %d\n", I2C_buf[0], I2C_buf[1], res);
I2C_buf[0] = 0x05; // write data to output port 1
I2C_buf[1] = 0x00;
res = i2c_master_write_to_device(I2C_MASTER_NUM, I2C_PORTEXP1, I2C_buf, 2, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
printf("\nMaster wrote %02X %02X: %d\n", I2C_buf[0], I2C_buf[1], res);
*/
return res1;
}
/**
* ADC_init: write a initalize the ADC
*
* @returns > then 0 if success, otherwise -1.
*/
esp_err_t ADC_init(void) {
int res;
I2C_buf[0] = 0x01; // -> config register
I2C_buf[1] = 0x40; // 0 100 000 0 A0-GND +-6.144 CONT
I2C_buf[2] = 0x0; // O00 0 0 0 11 8 SPS no comp
res = i2c_master_write_to_device(I2C_MASTER_NUM, ADC_DEFAULT_IIC_ADDR, I2C_buf, 3, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
printf("\nMaster wrote %02X %02X: %d\n", I2C_buf[0], I2C_buf[1], res);
return res;
}
/**
* ADC_init: read all ADC inputs
*
* @returns > then 0 if success, otherwise -1.
*/
int ADCReadAll(void) {
// for i in range(ADC_CHAN_NUM):
// data=self.bus.read_i2c_block_data(self.addr,REG_RAW_DATA_START+i,2)
// val=data[1]<<8|data[0]
// array.append(val)
int res1=0,res2,i;
I2C_buf[0] = 0x00; // conversion register
I2C_buf[1] = 0x00;
I2C_buf[2] = 0x00;
res1 = i2c_master_write_to_device(I2C_MASTER_NUM, ADC_DEFAULT_IIC_ADDR, I2C_buf, 1, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
// printf("\nI2C wrote 0x%02X: %d\n", I2C_buf[0], res1);
for (i=0;i<256;i++) {
res2 = i2c_master_read_from_device(I2C_MASTER_NUM, ADC_DEFAULT_IIC_ADDR, I2C_buf, 2, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
printf("I2C read %02x -> ",i);
// for (i=0;i<4;i++) {
printf(" %02X %02X ",I2C_buf[0],I2C_buf[1]);
// }
printf(" %d\n", res2);
}
// printf(" #:S%d R:%d ", res1, res2);
fflush(stdout);
return res1;
}
/**
* DoorIsClosed: test a door, if a switch is closed
*
* @param doormask specifies what doors to test
* @returns 1 of open, otherwise 0
*/
int DoorIsClosed(int doormask) {
int res1,res2;
I2C_buf[0] = 0x80; // Setze CMD read port 0
I2C_buf[1] = 0x00;
I2C_buf[2] = 0x00;
res1 = i2c_master_write_to_device(I2C_MASTER_NUM, I2C_PORTEXP1, I2C_buf, 1, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
// printf("\nI2C wrote 0x%02X%02X: %d\n", I2C_buf[0], I2C_buf[1], res1);
I2C_buf[0] = 0x00; // lese 3 bytes
res2 = i2c_master_read_from_device(I2C_MASTER_NUM, I2C_PORTEXP1, I2C_buf, 3, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
// printf("\nI2C read 0x %02X %02X %02X: %d\n", I2C_buf[0], I2C_buf[1], I2C_buf[2], res2);
printf(" #:S%d R:%d ", res1, res2);
fflush(stdout);
// Open 0x0F = 0000 1111
// 1 closed 0x0B = 0000 1011
// 2 closed 0x0E = 0000 1110
// 3 closed 0x0D = 0000 1101
// 4 closed 0x07 = 0000 0111
if ((I2C_buf[LOCKR_PORT] & doormask)==0) {
return 1;
} else {
return 0;
}
}
/**
* DoorOpen: open a door lock
*
* @param door number of the door to open
* @returns 0 if successfull
*/
int DoorOpen(int door) {
int mask=0;
int maskr=0;
int res;
int to=10;
switch (door) { // we allow only one door to open
case 1: {
mask = LOCK1;
maskr= LOCK1R;
} break;
case 2: {
mask = LOCK2;
maskr= LOCK2R;
} break;
case 3: {
mask = LOCK3;
maskr= LOCK3R;
} break;
default: {
mask = LOCK4;
maskr= LOCK4R;
}
}
I2C_buf[0] = 0x05;
I2C_buf[1] = mask;
printf("\nMASTER wrote %02X %02X\n", I2C_buf[0], I2C_buf[1]);fflush(stdout);
res = i2c_master_write_to_device(I2C_MASTER_NUM, I2C_PORTEXP1, I2C_buf, 2, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
printf("\nI2C wrote 0x%02X%02X: %d\n", I2C_buf[0], I2C_buf[1], res);fflush(stdout);
while (to>0) {
if (DoorIsClosed(maskr)==0) {
to=0;
} else {
to--;
vTaskDelay(1);
}
}
I2C_buf[0] = 0x05;
I2C_buf[1] = 0x00;
printf("\nMASTER wrote 0x%02X%02X\n", I2C_buf[0], I2C_buf[1]);fflush(stdout);
res = i2c_master_write_to_device(I2C_MASTER_NUM, I2C_PORTEXP1, I2C_buf, 2, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
printf("\nI2C wrote 0x%02X%02X: %d\n", I2C_buf[0], I2C_buf[1], res);
return 0;
}
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