diff options
| author | SCZeiDan <[email protected]> | 2024-05-05 00:51:27 +0800 |
|---|---|---|
| committer | GitHub <[email protected]> | 2024-05-04 12:51:27 -0400 |
| commit | d78429eb8e3222d094ee8048e53c229117e18916 (patch) | |
| tree | b741c305a607ecfecabccb99e1ccb87c9efa8873 /bsp/stm32 | |
| parent | 39e6b36bb02b431999bd8b91701d3761a56b3eb3 (diff) | |
[stm32] i2c hard driver fixup：增加硬件I2C传输超时等待时间
问题：
在使用硬件 I2C 驱动进行音频模块 WM8978 配置时，发现连续 rt_i2c_transfer 进行 I2C 传输时发现，连续多次调用 rt_i2c_transfer 会出现丢包现象；溯源发现是每次使用 rt_i2c_transfer 传输2字节，传输频率过高导致底层 HAL_I2C_Master_Seq_Transmit_DMA 报错 HAL_BUSY；
现象：
rt_completion_wait超时等待完成之后，I2C仍处于HAL_I2C_STATE_BUSY_TX状态，且后续第二次运行至HAL_I2C_Master_Seq_Transmit_DMA时会直接返回HAL_BUSY，从而直接 goto out; 退出而不会再次进行超时等待；
* drv_hard_i2c.c: 修复325行缺失'}'语法错误;更改HAL_I2C_xx_Transimt_xx调用中目标设备地址值;i2c_hard_config.h: 添加STM32F系列芯片xx_DMA_CONFIG宏定义;
* 回溯I2C设备地址传参处(msg->addr<<1)修改；
* fixup: 增加硬件I2C传输延时，解决连续传输导致HAL_BUSY状态；
Diffstat (limited to 'bsp/stm32')
| -rw-r--r-- | bsp/stm32/libraries/HAL_Drivers/drivers/drv_hard_i2c.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/bsp/stm32/libraries/HAL_Drivers/drivers/drv_hard_i2c.c b/bsp/stm32/libraries/HAL_Drivers/drivers/drv_hard_i2c.c index 08ac464592..405644a36d 100644 --- a/bsp/stm32/libraries/HAL_Drivers/drivers/drv_hard_i2c.c +++ b/bsp/stm32/libraries/HAL_Drivers/drivers/drv_hard_i2c.c @@ -177,7 +177,7 @@ static rt_ssize_t stm32_i2c_master_xfer(struct rt_i2c_bus_device *bus, LOG_D("xfer msgs[%d] addr=0x%2x buf=0x%x len= 0x%x flags= 0x%x", i, msg->addr, msg->buf, msg->len, msg->flags); next_msg = &msgs[i + 1]; next_flag = next_msg->flags; - timeout = msg->len/TRANS_TIMEOUT_PERSEC + 1; + timeout = msg->len/TRANS_TIMEOUT_PERSEC + 5; if (next_flag & RT_I2C_NO_START) { if ((next_flag & RT_I2C_RD) == (msg->flags & RT_I2C_RD)) @@ -250,7 +250,7 @@ static rt_ssize_t stm32_i2c_master_xfer(struct rt_i2c_bus_device *bus, } /* last msg */ msg = &msgs[i]; - timeout = msg->len/TRANS_TIMEOUT_PERSEC+1; + timeout = msg->len/TRANS_TIMEOUT_PERSEC + 5; if (msg->flags & RT_I2C_NO_STOP) mode = I2C_LAST_FRAME_NO_STOP; else |