Pingtouge RVB2601 board-IIC bus test

bigbat

Pingtouge RVB2601 board-IIC bus test [Copy link]

 

The internal design of CH2601 has an IIC bus. The I2C bus on the board is connected to ES7210. The ES7210 chip is a four-channel ADC acquisition chip. A silicon microphone is connected to the board.

The data of ES7210 is connected to CH2601 through I2S bus. The configuration of chip is connected to CH2601 through IIC. I2S is the transmission channel of audio data. I initially planned to use IIC to read the configuration information of ES7210, but I didn't have the information of ES7210, so I couldn't test it. So the only way was to remove the jumper. That is, the two jumpers [3,4] and [5,6] of J1 would do.

Wiring diagram of the board

The two jumper wires PA8 and PA9 will do. I connected these two wires to the adapter at the same time to observe the waveform.

Program reference files

#include "drv/iic.h"
#include <soc.h>

Procedure steps

1. Turn on the pin function, csi_pin_set_mux(PA8, PA8_IIC0_SCL);

2. Initialize the port, ret = csi_iic_init(&master_iic, IIC_IDX); port 0

3. Configure IIC to master mode, ret = csi_iic_mode(&master_iic, IIC_MODE_MASTER);

4. Configure the device address, ret = csi_iic_addr_mode(&master_iic, IIC_ADDRESS_7BIT);

5. Set the IIC bus speed, ret = csi_iic_speed(&master_iic, IIC_BUS_SPEED_STANDARD);

6. Send data, num = csi_iic_master_send(&master_iic, IIC_SLAVE_ADDR, write_data, sizeof(write_data), 100000);

7. Receive data, num = csi_iic_master_receive(&master_iic, IIC_SLAVE_ADDR, read_data, sizeof(read_data), 100000);

#include "drv/iic.h"
#include <soc.h>

#define IIC_SLAVE_ADDR      0x50
#define IIC_IDX             0
static csi_iic_t master_iic;

int example_iic(void)
{
  uint8_t write_data[10];
  uint8_t read_data[10];
  csi_error_t ret;
  uint32_t i;
  int32_t num;
  
  csi_pin_set_mux(PA8, PA8_IIC0_SCL);
  csi_pin_set_mux(PA9, PA9_IIC0_SDA);
  
  ret = csi_iic_init(&master_iic, IIC_IDX);
  if (ret != CSI_OK) {
    printf("csi_iic_initialize error\n");  
    return -1;
  }
  /* config iic master mode */  
  ret = csi_iic_mode(&master_iic, IIC_MODE_MASTER);
  if (ret != CSI_OK) {
      printf("csi_iic_set_mode error\n");
      return -1;
  }
  /* config iic 7bit address mode */  
  ret = csi_iic_addr_mode(&master_iic, IIC_ADDRESS_7BIT);
  if (ret != CSI_OK) {
      printf("csi_iic_set_addr_mode error\n");
      return -1;
  }
  /* config iic standard speed*/  
  ret = csi_iic_speed(&master_iic, IIC_BUS_SPEED_STANDARD);
  if (ret != CSI_OK) {
      printf("csi_iic_set_speed error\n");
      return -1;
  }

  for (i = 0; i < sizeof(write_data); i++) { 
      write_data = i;           ///< init write_data value
  }

  num = csi_iic_master_send(&master_iic, IIC_SLAVE_ADDR, write_data, sizeof(write_data), 100000);
  if (num != sizeof(write_data)) {
      printf("csi_iic_master_send error\n");
      return -1;
  }

  num = csi_iic_master_receive(&master_iic, IIC_SLAVE_ADDR, read_data, sizeof(read_data), 100000);
  if (num != sizeof(read_data)) {
      printf("csi_iic_master_receive error\n");
      return -1;
    }
  csi_iic_uninit(&master_iic);
  return 0;
}

I called the test function in the main program

int main(void)
{
    board_yoc_init();
	example_iic();
    LOGD(TAG, "%s\n", aos_get_app_version());
    oled_init();
	
    while (1) {
        LOGD(TAG, "Hello world! YoC");
        aos_msleep(1000);
    }

    return 0;
}

I used an oscilloscope and saw pulse output, but I don't know why the program always gets stuck in the function num = csi_iic_master_send(&master_iic, IIC_SLAVE_ADDR, write_data, sizeof(write_data), 100000);

And whether the timeout mechanism works. You can see that there is a while(1) loop in the function. Guess: The possible reason is that there is no device connected and no ACK signal!

littleshrimp

It should be that I2C must have a slave device with a matching address to respond.

Jacktang

It should be because there is no access device.

annysky2012

Read the ID first and see if you can read it?

bigbat

annysky2012 posted on 2021-9-11 10:13 Read the ID first and see if you can read it out?

That's what I thought at first, but there's no information about ES7210.

annysky2012

bigbat posted on 2021-9-11 10:21 That’s what I thought at first, but there is no information about ES7210

Ask the manufacturer

w494143467

bigbat posted on 2021-9-11 10:21 That’s what I thought at first, but there is no information about ES7210

You poll and scan the IIC peripheral devices, try from 0x01 to 0xff and see if there is any response.