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Merge pull request #5309 from chenyingchun0312/fea_nrf5x_i2c_driver 

[bsp/nrf5x] fix i2c driver bug
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guo 2021-11-29 14:11:53 +08:00 committed by GitHub
parent 9c78680f36 8f65ea4e70
commit ccfb3cb67d
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 33 additions and 14 deletions
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47
bsp/nrf5x/libraries/drivers/drv_i2c.c
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@ -6,6 +6,7 @@
* Change Logs:
* Date Author Notes
* 2020-11-15 xckhmf First Verison
* 2021-11-27 chenyingchun fix _master_xfer bug
*
*/
@ -56,36 +57,54 @@ static int twi_master_init(struct rt_i2c_bus_device *bus)
nrfx_twi_twim_bus_recover(config.scl,config.sda);
rtn = nrfx_twim_init(p_instance,&config,NULL,NULL);
if (rtn != NRFX_SUCCESS)
{
return rtn;
}
nrfx_twim_enable(p_instance);
return 0;
}
static rt_size_t _master_xfer(struct rt_i2c_bus_device *bus,
struct rt_i2c_msg msgs[],
rt_uint32_t num)
struct rt_i2c_msg msgs[],
rt_uint32_t num)
{
nrfx_twim_t const * p_instance = &((drv_i2c_cfg_t *)bus->priv)->twi_instance;
struct rt_i2c_msg *msg;
nrfx_twim_t const *p_instance = &((drv_i2c_cfg_t *)bus->priv)->twi_instance;
nrfx_err_t ret = NRFX_ERROR_INTERNAL;
uint32_t no_stop_flag = 0;
rt_int32_t i = 0;
nrfx_twim_xfer_desc_t xfer = NRFX_TWIM_XFER_DESC_TX(msgs->addr,msgs->buf, msgs->len);
if((msgs->flags & 0x01) == RT_I2C_WR)
for (i = 0; i < num; i++)
{
xfer.type = NRFX_TWIM_XFER_TX;
if((msgs->flags & 0x40) == RT_I2C_NO_READ_ACK)
msg = &msgs[i];
nrfx_twim_xfer_desc_t xfer = NRFX_TWIM_XFER_DESC_TX(msg->addr, msg->buf, msg->len);
if (msg->flags & RT_I2C_RD)
{
no_stop_flag = NRFX_TWIM_FLAG_TX_NO_STOP;
xfer.type = NRFX_TWIM_XFER_RX;
}
else
{
xfer.type = NRFX_TWIM_XFER_TX;
if (msg->flags & RT_I2C_NO_READ_ACK)
{
no_stop_flag = NRFX_TWIM_FLAG_TX_NO_STOP;
}
}
ret = nrfx_twim_xfer(p_instance, &xfer, no_stop_flag);
if (ret != NRFX_SUCCESS)
{
goto out;
}
}
else if((msgs->flags & 0x01) == RT_I2C_RD)
{
xfer.type = NRFX_TWIM_XFER_RX;
}
ret = nrfx_twim_xfer(p_instance,&xfer,no_stop_flag);
return (ret == NRFX_SUCCESS) ? msgs->len : 0;
out:
return i;
}
static const struct rt_i2c_bus_device_ops _i2c_ops =
{
_master_xfer,