How to print numbers in HEX with printf in C? static void ReadReg_SI5338(uint8_t *pBuffer) { uint8_t ret; ret = HAL_I2C_Master_Transmit(&hi2c2, SI5338_ADDR, pBuffer, 1, 5); if ( ret != HAL_OK ) { printf("Error Tx\r\n"); } else { ret = HAL_I2C_Master_Receive(&hi2c2, SI5338_ADDR, pBuffer, 1, 5); if ( ret != HAL_OK ) { printf("Error Rx\r\n"); } else {… Read More How to print numbers in HEX with printf in C?