Keil forum CMSIS Driver i2c not working when using STM32H743

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CMSIS Driver i2c not working when using STM32H743

Offline Shiqiang over 1 year ago

HI,

I start a project to read an EEPROM(AT24C02) using CMSIS Driver. The code I refer to is from this page: I2C Interface (arm-software.github.io).

Modification listed below:

1) due to my board, change the eeprom i2c addr from 0x51 to 0x50

#define EEPROM_I2C_ADDR       0x50      /* EEPROM I2C address */

2） change I2C speed from ARM_I2C_BUS_SPEED_FAST to ARM_I2C_BUS_SPEED_STANDARD

I2Cdrv->Control      (ARM_I2C_BUS_SPEED, ARM_I2C_BUS_SPEED_STANDARD);

After EEPROM address send out and receive ack from slave, MCU do not send data and I2C status always return busy.

Here is the waveform

Attached is the project:

Shiqiang