Timeout,tickstart)!=HAL_OK){if(hi2c->ErrorCode==HAL_I2C_ERROR_AF){/* Generate Stop */hi2c->Instance->CR1|=I2C_CR1_STOP;returnHAL_ERROR;}else{returnHAL_TIMEOUT;}}/* Write data to DR */hi2c->Instance->
/* Check if the I2C is already enabled */ if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE){ /* Enable I2C peripheral */ __HAL_I2C_ENABLE(hi2c); } /* Disable Pos */ hi2c->Instance->CR1 &= ~I2C_CR1_POS; hi2c->State = HAL_I2C_STATE_BUSY_TX; hi2c->Mode = HAL...
I2C1->CR1 |= I2C_CR1_ACK 小Tips: 一般等待RXNE或者TXE的地方,都可以等待BTF 根据参考手册里的描述, BTF在接收时必须保证接下来传输的数据必须大于2条消息(如果你设置了POS的话,ACK也算一条消息)。 在slave模式下,如果收到了master的NACK,则不再设置BTF位。 (RM0090 REV.19 P868) STM32 I2C异常处理 ...
= I2C_CR1_PE){ /* Enable I2C peripheral */ __HAL_I2C_ENABLE(hi2c); } /* Disable Pos */ hi2c->Instance->CR1 &= ~I2C_CR1_POS; hi2c->State = HAL_I2C_STATE_BUSY_TX; hi2c->Mode = HAL_I2C_MODE_MASTER; hi2c->ErrorCode = HAL_I2C_ERROR_NONE; /* Prepare transfer parameters ...
总线上的P产生后最好不要配置CR1的ACK位。STOP发送后配置ACK位——作为主机接收最后一字节时需要发送NACK,同时我们需要响应自己的从机地址,这时需要重新配置ACK为”1″——有可能导致下一次作为主机通信发送地址时,硬件不发送地址而直接发送P——这应该是一个硬件BUG,暂时还没有看见相关资料——具体表现为EV6死循环...
hi2c->Instance->CR1&=~I2C_CR1_POS; hi2c->State=HAL_I2C_STATE_BUSY_TX; hi2c->Mode=HAL_I2C_MODE_MASTER; hi2c->ErrorCode=HAL_I2C_ERROR_NONE; /*Preparetransferparameters*/ hi2c->pBuffPtr=pData; hi2c->XferCount=Size; hi2c->XferOptions=I2C_NO_OPTION_FRAME; ...
hi2c->Instance->CR1 &= ~I2C_CR1_POS; hi2c->State = HAL_I2C_STATE_BUSY_TX; hi2c->Mode = HAL_I2C_MODE_MASTER; hi2c->ErrorCode = HAL_I2C_ERROR_NONE; /* Prepare transfer parameters */ hi2c->pBuffPtr = pData; hi2c->XferCount = Size; ...
(0x4<< I2C_TIMINGR_SCLDEL_Pos);break; } ptr->TIMINGR = temp; ptr->CR1 |= I2C_CR1_PE_Msk; }else{//使能地址寄存器1,设置从机地址为slaveAddressptr->OAR1 &= ~I2C_OAR1_OA1EN_Msk; ptr->OAR1 = (slaveAddress<<1) | I2C_OAR1_OA1EN_Msk; ...
=HAL_OK){returnHAL_BUSY;}/* Process Locked */__HAL_LOCK(hi2c);/* Check if the I2C is already enabled */if((hi2c->Instance->CR1&I2C_CR1_PE)!=I2C_CR1_PE){/* Enable I2C peripheral */__HAL_I2C_ENABLE(hi2c);}/* Disable Pos */hi2c->Instance->CR1&=~I2C_CR1_POS;hi2c->...
总线上的P产生后最好不要配置CR1的ACK位。STOP发送后配置ACK位——作为主机接收最后一字节时需要发送NACK,同时我们需要响应自己的从机地址,这时需要重新配置ACK为”1″——有可能导致下一次作为主机通信发送地址时,硬件不发送地址而直接发送P——这应该是一个硬件BUG,暂时还没有看见相关资料——具体表现为EV6死循环...