- Wed Mar 09, 2016 5:33 am
#42739
Hi,
Have a little Problem with the I2C Driver of Espressif. SDA works, but SCL stays always low. Tried with and without pullups on SDA/SCL.
My Code:
SDA - GPIO2
SCL - GPIO14
Config in i2c_master.h:
Have I forgot something or is this a common issue?
Berkutta
Have a little Problem with the I2C Driver of Espressif. SDA works, but SCL stays always low. Tried with and without pullups on SDA/SCL.
My Code:
Code: Select all
#ifdef __cplusplus
extern "C"
{
#endif
#include <ets_sys.h>
#include <osapi.h>
#include <gpio.h>
#include <os_type.h>
#include <user_interface.h>
#include <espmissingincludes.h>
#include <espconn.h>
#include <i2c_master.h>
//#include "include/driver/spi.h"
int user_init();
#ifdef __cplusplus
}
#endif
#ifdef ESP8266_GDBSTUB
#include <gdbstub.h>
#endif
static char s_ReplyFormat[] = "HTTP/1.1 200 OK\r\nContent-type: text/html\r\n\r\n<html><body><h1>Hello, World</h1>This page was generated by your ESP8266 device %d times.<br>Current Uptime: %ds<br>Currently no Temp & Humidity available!</body></html>";
static char s_Reply[sizeof(s_ReplyFormat) + 20];
static int s_RequestNumber;
static void httpdConnectCb(void *arg)
{
struct espconn *pConn = (struct espconn*)arg;
os_sprintf(s_Reply, s_ReplyFormat, ++s_RequestNumber, system_get_time() / 1000000);
espconn_sent(pConn, (uint8_t *)s_Reply, strlen(s_Reply));
espconn_disconnect(pConn);
}
static os_timer_t s_Timer;
static os_timer_t sensor_Timer;
int s_Tick = 0;
void TimerFunction(void *arg)
{
s_Tick++;
//Uncomment the line below to disable the software watchdog that will restart the ESP8266 system after it spends more than ~1 second stopped at a breakpoint.
//system_soft_wdt_stop();
if (GPIO_REG_READ(GPIO_OUT_ADDRESS) & BIT2)
{
gpio_output_set(0, BIT2, BIT2, 0);
}
else
{
gpio_output_set(BIT2, 0, BIT2, 0);
}
}
void read_sensor(void *arg)
{
char byte1, byte2, byte3;
i2c_master_start();
i2c_master_writeByte(0b10000000);
i2c_master_writeByte(0xE3);
i2c_master_stop();
i2c_master_start();
i2c_master_writeByte(0b10000000);
byte1 = i2c_master_readByte();
byte2 = i2c_master_readByte();
byte3 = i2c_master_readByte();
i2c_master_stop();
}
int user_init()
{
#ifdef ESP8266_GDBSTUB
//gdbstub_init();
#endif
gpio_init();
struct ip_info info;
struct station_config cfg;
//Set Wifi to Station (Client) mode
wifi_set_opmode(STATION_MODE);
//Get (empty) config
wifi_station_get_config(&cfg);
//Set Wi-Fi Credidentals
strcpy((char *)cfg.ssid, "wifi");
strcpy((char *)cfg.password, "pass");
//Save Wi-Fi config
wifi_station_set_config(&cfg);
//Connect with saved config
wifi_station_connect();
static struct espconn httpdConn;
static esp_tcp httpdTcp;
httpdConn.type = ESPCONN_TCP;
httpdConn.state = ESPCONN_NONE;
httpdTcp.local_port = 80;
httpdConn.proto.tcp = &httpdTcp;
espconn_regist_connectcb(&httpdConn, httpdConnectCb);
espconn_accept(&httpdConn);
//PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO2_U, FUNC_GPIO2);
//gpio_output_set(0, BIT2, BIT2, 0);
//os_timer_setfn(&s_Timer, TimerFunction, NULL);
//os_timer_arm(&s_Timer, 300, 1);
i2c_master_init();
os_timer_setfn(&sensor_Timer, read_sensor, NULL);
os_timer_arm(&sensor_Timer, 500, 1);
return 0;
}SDA - GPIO2
SCL - GPIO14
Config in i2c_master.h:
Code: Select all
#define I2C_MASTER_SDA_MUX PERIPHS_IO_MUX_GPIO2_U
#define I2C_MASTER_SCL_MUX PERIPHS_IO_MUX_MTMS_U
#define I2C_MASTER_SDA_GPIO 2
#define I2C_MASTER_SCL_GPIO 14
#define I2C_MASTER_SDA_FUNC FUNC_GPIO2
#define I2C_MASTER_SCL_FUNC FUNC_GPIO14Have I forgot something or is this a common issue?
Berkutta
