在ESP32中,已经带了硬件的I2C,因此只需要调用相关的API接口,就可以实现I2C通讯。 I2C API接口函数如下: I2C 配置函数:i2c_param_config(); I2C 功能安装使能函数:i2c_driver_install(); 创建I2C 连接函数:i2c_cmd_link_create(); 写启动信号到缓存函数:i2c_master_start(); 写一个字节的命令放到到缓存函数:...
#define I2C_MASTER_NUM I2C_NUM_0 // I2C port number #define I2C_MASTER_TX_BUF_DISABLE 0 // I2C master do not need buffer #define I2C_MASTER_RX_BUF_DISABLE 0 // I2C master do not need buffer #define I2C_MASTER_FREQ_HZ 100000 // I2C frequency #define TM1650_ADDR 0x3C // TM1650...
charcount =0;voidsetup(){// put your setup code here, to run once:// Serial.begin(9600);// //testdrawcircle();// display.begin(i2c_Address,true);// testdrawbitmap(logo16_glcd_bmp, LOGO16_GLCD_HEIGHT, LOGO16_GLCD_WIDTH);Serial.begin(115200);/* prepare ...
freq() # get current frequency (default 5kHz) pwm0.freq(1000) # set PWM frequency from 1Hz to 40MHz duty = pwm0.duty() # get current duty cycle, range 0-1023 (default 512, 50%) pwm0.duty(256) # set duty cycle from 0 to 1023 as a ratio duty/1023, (now 25%) duty_u16 =...
I2C_MASTER_PORT I2C_NUM_0 /*!< I2C port number for master dev */ #define I2C_MASTER_FREQ_HZ 400000 /*!< I2C master clock frequency - FAST MODE */ static void i2c_scan_task(void *arg) { // --- // Configure i2c // Per these docs: // https://docs.espressif.com/projects/es...
.master.clk_speed = I2C_MASTER_FREQ_HZ, // select frequency specific to your project // .clk_flags = 0, /*!< Optional, you can use I2C_SCLK_SRC_FLAG_* flags to choose i2c source clock here. */ }; 1. 2. 3. 4. 5.
Re: I2C frequency stuck at 20MHZ PostbyESP_Sprite»Fri Jun 28, 2019 4:36 am Not relevant to the problem, but note that both your code will break if esp-idf is updated and i2c_config gets an extra field. The proper way to initialize it would be something like ...
Hi, I need to change the frequency of the I2C frequency in runtime, is possible do that calling only Code: [Select all] [Expand/Collapse] i2c_param_config() GeSHi © Codebox Plus Extension without uninstall and reinstall the i2c driver? Thanks...
I have a IC_FREQ_HZ of 400kHz and I know I don't have the same for the hx711 device. Do I have to change the i2C frequency to match the IC with the smallest one? The other issue is that when I try to run my software
(){// put your setup code here, to run once:// Serial.begin(9600);// //testdrawcircle();// display.begin(i2c_Address,true);// testdrawbitmap(logo16_glcd_bmp, LOGO16_GLCD_HEIGHT, LOGO16_GLCD_WIDTH);Serial.begin(115200);/* prepare for possible serial debug */setCpuFrequencyMhz(...