Other Parts Discussed in Thread: EV2400
BQ76952 IIC通信初始化时设置
BQ769x2_SetRegister(REG12Config, 0x0d, 1);// 'REG12 Config' - Enable REG1 with 3.3V output (0x0D for 3.3V, 0x0F for 5V) 后测量REG1引脚输出电压为0,IIC没有通信成功,这个问题的原因是什么?另外请问你们有相关的IIC demo吗?
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您好, REG1 and REG2 are not enabled by default, so while the EV2400 is connected, the REG0 Configuration and REG12 Configuration registers need to be programmed. Are these being configured correctly before the EV2400 is disconnected?
BQ769x2 Software Development Guide
BQ76952 MCU sample code
您好 ,建议您用评估板验证一下是板子的问题,还是代码的问题。
您好,这个问题已经在E2E英文论坛发帖,暂时没有收到回复,请继续关注。
您好,推荐您使用100khz的通讯频率。
What are their communication settings? For frequencies higher than 100-kHz they should use the I2C Fast. For frequencies below or at 100-kHz, they should use normal I2C.This is changed in DataMemory>Settings>Comm Type. There is a description of these in Table 9-1. Comm Type Data Memory Settings of the Technical Reference Manual.
Additionally, the timing requirements are listed in Section 7.27 Timing Requirements - I2C Interface, 100kHz Mode and Section 7.28 Timing Requirements - I2C Interface, 400kHz Mode of the datasheet. They must make sure that they meet these requirements.