Regarding the issue where the ULD API of vl53l1x fails to obtain the ranging result

[wuyou]

I wrote the i2c communication code for the vl53l1x ULD API in vl53l1_platform.c and i2c32.c, and called the API in tof.c to initialize vl53l1. The VL53L1X_GetSensorId function can correctly read 0xEACC, but the VL53L1X_CheckForDataReady function always shows that the distance measurement is not completed, and at the same time, the VL53L1X_GetDistance also cannot read the distance measurement result.

[Zhiyuan.Han · Accepted solution]

Hi

I see you are using a GPIO simulated I2C, please check you I2C function well. 

Below are the codes for I2C read/write function check: 

uint8_t byteData;

uint16_t wordData;

uint32_t DwordData;

uint8_t test_buffer_write[4]={0x5A,0xA5,0XAA,0x55};

uint8_t test_buffer_read[4];

VL53L1_RdByte(Dev, 0x010F, &byteData);

printf("VL53L1X Model_ID: %02X\n\r", byteData);

VL53L1_RdByte(Dev, 0x0110, &byteData);

printf("VL53L1X Module_Type: %02X\n\r", byteData);

VL53L1_RdWord(Dev, 0x010F, &wordData);

printf("VL53L1X: %02X\n\r", wordData);

VL53L1_WrWord(Dev, 0x0016, 0x5AA5);

VL53L1_RdWord(Dev, 0x0016, &wordData);

printf("Write 0x5AA5, read value: %02X\n\r", wordData);

VL53L1_WrDWord(Dev, 0x0016, 0x5AA5AA55);

VL53L1_RdDWord(Dev, 0x0016, &DwordData);

printf("Write 0x5AA5AA55, read value: %02X\n\r", DwordData);

VL53L1_WriteMulti(Dev, 0x0016, test_buffer_write,4);

VL53L1_ReadMulti(Dev, 0x0016, test_buffer_read,4);

printf("WriteMulti 4 byte: 0x5AA5AA55\n\r");

printf("ReadMulti 0: %02X\n\r", test_buffer_read[0]);

printf("ReadMulti 1: %02X\n\r", test_buffer_read[1]);

printf("ReadMulti 2: %02X\n\r", test_buffer_read[2]);

printf("ReadMulti 3: %02X\n\r", test_buffer_read[3]);

Log list as below from Nucleo:

VL53L1X Model_ID: EA

VL53L1X Module_Type: CC

VL53L1X: EACC

Write 0x5AA5, read value: 5AA5

Write 0x5AA5AA55, read value: 5AA5AA55

WriteMulti 4 byte: 0x5AA5AA55

ReadMulti 0: 5A

ReadMulti 1: A5

ReadMulti 2: AA

ReadMulti 3: 55

Br

Zhiyuan.Han