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Commit 78a0f9e

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nuclearcatnuclearcat
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Initial, but working versions
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‎dht.c‎

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#include "esp_common.h"
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#include <fcntl.h>
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#include <stdio.h>
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#include <gpio.h>
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/*
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GPIO0: PERIPHS_IO_MUX_GPIO0_U
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GPIO1: PERIPHS_IO_MUX_U0TXD_U
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GPIO2: PERIPHS_IO_MUX_GPIO2_U
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GPIO3: PERIPHS_IO_MUX_U0RXD_U
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GPIO4: PERIPHS_IO_MUX_GPIO4_U
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GPIO5: PERIPHS_IO_MUX_GPIO5_U
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GPIO6: PERIPHS_IO_MUX_SD_CLK_U
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GPIO7: PERIPHS_IO_MUX_SD_DATA0_U
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GPIO8: PERIPHS_IO_MUX_SD_DATA1_U
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GPIO9: PERIPHS_IO_MUX_SD_DATA2_U
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GPIO10: PERIPHS_IO_MUX_SD_DATA3_U
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GPIO11: PERIPHS_IO_MUX_SD_CMD_U
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GPIO12: PERIPHS_IO_MUX_MTDI_U
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GPIO13: PERIPHS_IO_MUX_MTCK_U
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GPIO14: PERIPHS_IO_MUX_MTMS_U
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GPIO15: PERIPHS_IO_MUX_MTDO_U
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*/
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/* ESP12 PIN4 and PIN5 swapped :@ */
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#define OW_PIN_NUM 4
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#define OW_GET_IN() ( GPIO_INPUT_GET(GPIO_ID_PIN(OW_PIN_NUM)) )
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#define OW_OUT_LOW() ( GPIO_OUTPUT_SET(GPIO_ID_PIN(OW_PIN_NUM), 0) )
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#define OW_OUT_HIGH() ( GPIO_OUTPUT_SET(GPIO_ID_PIN(OW_PIN_NUM), 1) )
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#define OW_DIR_IN() ( GPIO_DIS_OUTPUT(GPIO_ID_PIN(OW_PIN_NUM)) )
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void delay_ms(uint32_t ms)
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{
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uint32_t i;
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for (i = 0; i < ms; i++)
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os_delay_us(1000);
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}
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#define MAXWAIT 1000000
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int expectpulse(uint level) {
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int waittime = MAXWAIT-1;
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while (waittime--) {
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if (OW_GET_IN() == level) {
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break;
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}
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//os_delay_us(1);
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}
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if (waittime)
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return(MAXWAIT-waittime);
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else
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return(0);
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}
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int dht_read(int *temp, int *hum) {
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uint8_t data[5];
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int i;
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memset(data, 0x0, 5);
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PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO4_U, FUNC_GPIO4);
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PIN_PULLUP_DIS(PERIPHS_IO_MUX_GPIO4_U);
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OW_OUT_HIGH();
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delay_ms(250);
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OW_OUT_LOW();
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delay_ms(5); // Tbe (Host starting signal low time)
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portENTER_CRITICAL();
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uint32_t cycles[80];
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{
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int i;
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OW_DIR_IN();
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i = expectpulse(1);
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if (!i)
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goto bad;
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i = expectpulse(0);
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if (!i)
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goto bad;
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i = expectpulse(1);
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if (!i)
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goto bad;
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i = expectpulse(0);
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if (!i)
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goto bad;
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for (i=0; i<80; i+=2) {
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cycles[i] = expectpulse(1);
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cycles[i+1] = expectpulse(0);
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}
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}
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portEXIT_CRITICAL();
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for (i=0; i<40; ++i) {
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uint32_t lowCycles = cycles[2*i];
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uint32_t highCycles = cycles[2*i+1];
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if ((lowCycles == 0) || (highCycles == 0)) {
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return(0);
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}
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data[i/8] <<= 1;
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if (highCycles > lowCycles) {
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data[i/8] |= 1;
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}
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}
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*hum = ((data[0] << 8) + data[1]);
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if ( *hum > 1000 )
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*hum = data[0];
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*temp = (((data[2] & 0x7F) << 8) + data[3]);
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if ( *temp > 1250 )
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*temp = data[2];
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if ( data[2] & 0x80 )
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*temp = -*temp;
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return(1);
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bad:
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portEXIT_CRITICAL();
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return(0);
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}

‎ds18b20.c‎

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#include "esp_common.h"
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#include <fcntl.h>
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#include <stdio.h>
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#include <gpio.h>
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/*
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GPIO0: PERIPHS_IO_MUX_GPIO0_U
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GPIO1: PERIPHS_IO_MUX_U0TXD_U
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GPIO2: PERIPHS_IO_MUX_GPIO2_U
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GPIO3: PERIPHS_IO_MUX_U0RXD_U
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GPIO4: PERIPHS_IO_MUX_GPIO4_U
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GPIO5: PERIPHS_IO_MUX_GPIO5_U
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GPIO6: PERIPHS_IO_MUX_SD_CLK_U
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GPIO7: PERIPHS_IO_MUX_SD_DATA0_U
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GPIO8: PERIPHS_IO_MUX_SD_DATA1_U
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GPIO9: PERIPHS_IO_MUX_SD_DATA2_U
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GPIO10: PERIPHS_IO_MUX_SD_DATA3_U
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GPIO11: PERIPHS_IO_MUX_SD_CMD_U
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GPIO12: PERIPHS_IO_MUX_MTDI_U
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GPIO13: PERIPHS_IO_MUX_MTCK_U
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GPIO14: PERIPHS_IO_MUX_MTMS_U
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GPIO15: PERIPHS_IO_MUX_MTDO_U
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*/
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/* ESP12 PIN4 and PIN5 swapped :@ */
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#define OW_PIN_NUM 4
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#define OW_GET_IN() ( GPIO_INPUT_GET(GPIO_ID_PIN(OW_PIN_NUM)) )
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#define OW_OUT_LOW() ( GPIO_OUTPUT_SET(GPIO_ID_PIN(OW_PIN_NUM), 0) )
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#define OW_OUT_HIGH() ( GPIO_OUTPUT_SET(GPIO_ID_PIN(OW_PIN_NUM), 1) )
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#define OW_DIR_IN() ( GPIO_DIS_OUTPUT(GPIO_ID_PIN(OW_PIN_NUM)) )
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// OK if just using a single permanently connected device
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int onewire_reset() {
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int r;
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PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO4_U, FUNC_GPIO4);
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PIN_PULLUP_DIS(PERIPHS_IO_MUX_GPIO4_U);
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portENTER_CRITICAL();
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OW_OUT_LOW();
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os_delay_us(480);
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OW_DIR_IN();
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os_delay_us(70);
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r = OW_GET_IN(); // Is OW device present it will pull low
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portEXIT_CRITICAL();
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os_delay_us(410); // TODO: Why?
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// if r - 1 - bad, means device didnt pulled low
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return(r);
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}
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#define OW_RECOVERY_TIME 10 // Depends on wire length
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/*********************** onewire_write() ********************************/
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/*This function writes a byte to the sensor.*/
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/* */
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/*Parameters: byte - the byte to be written to the 1-wire */
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/*Returns: */
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/*********************************************************************/
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void onewire_write(int data) {
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int count, temp;
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for (count=0; count<8; ++count) {
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portENTER_CRITICAL();
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temp = data>>count;
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temp &= 0x1;
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if (temp) {
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OW_OUT_LOW();
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os_delay_us(10);
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OW_OUT_HIGH();
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os_delay_us(55);
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} else {
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OW_OUT_LOW();
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os_delay_us(65);
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OW_OUT_HIGH();
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os_delay_us(5);
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}
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portEXIT_CRITICAL();
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}
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}
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int onewire_read() {
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int count, data = 0;
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for (count=0; count<8; ++count) {
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portENTER_CRITICAL();
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OW_OUT_LOW();
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os_delay_us(3);
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OW_DIR_IN();
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os_delay_us(10);
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if (OW_GET_IN())
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data |= (1<<count);
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os_delay_us(53);
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portEXIT_CRITICAL();
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}
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return( data );
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}
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int ds1820_read() {
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uint8_t i=0, data[9], type=0;
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int16_t raw;
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if (onewire_reset())
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return(0); // Device not found
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onewire_reset();
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// Read ROM (and important - type)
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onewire_write(0x33);
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for (i=0; i<8; i++)
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data[i] = onewire_read();
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type = data[0];
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onewire_reset();
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onewire_write(0xCC);
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onewire_write(0x44);
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while (i == 0)
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i = onewire_read();
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// Conversion delay
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vTaskDelay(1000 / portTICK_RATE_MS);
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onewire_reset();
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onewire_write(0xCC);
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onewire_write(0xBE);
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for (i=0; i<9; i++)
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data[i] = onewire_read();
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raw = (data[1] << 8) | data[0]; // glue to 16bit value
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// old DS
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if (type == 0x10) {
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raw = raw << 3; // 9 bit resolution default
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// remaining - to archieve full resolution (12bit)
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if (data[7] == 0x10)
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raw = (raw & 0xFFF0) + 12 - data[6];
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} else {
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uint8_t cfg = (data[4] & 0x60);
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if (cfg == 0x00)
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raw = raw & ~7; // 9 bit resolution, 93.75 ms
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else if (cfg == 0x20)
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raw = raw & ~3; // 10 bit res, 187.5 ms
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else if (cfg == 0x40)
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raw = raw & ~1; // 11 bit res, 375 ms
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}
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// default is 12 bit resolution, 750 ms conversion time
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// we get YXXX - where it is Y.XXX * 1000 to avoid float
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return(raw * 1000 / 16);
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}

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