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[dirver/i2c] i2c driver support bus lock, STOP control

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This commit is contained in:
xieyangrun
2020-09-23 17:17:20 +08:00
parent d92fbba3c1
commit 54c6e7d145
3 changed files with 23 additions and 5 deletions
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components/drivers/include/drivers/i2c.h
+12
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@@ -23,6 +23,7 @@ extern "C" {
#define RT_I2C_NO_START (1u << 4)
#define RT_I2C_IGNORE_NACK (1u << 5)
#define RT_I2C_NO_READ_ACK (1u << 6) /* when I2C reading, we do not ACK */
#define RT_I2C_NO_STOP (1u << 7)
struct rt_i2c_msg
{
@@ -83,6 +84,17 @@ rt_size_t rt_i2c_master_recv(struct rt_i2c_bus_device *bus,
rt_uint16_t flags,
rt_uint8_t *buf,
rt_uint32_t count);
rt_inline rt_err_t rt_i2c_bus_lock(struct rt_i2c_bus_device *bus, rt_tick_t timeout)
{
return rt_mutex_take(&bus->lock, timeout);
}
rt_inline rt_err_t rt_i2c_bus_unlock(struct rt_i2c_bus_device *bus)
{
return rt_mutex_release(&bus->lock);
}
int rt_i2c_core_init(void);
#ifdef __cplusplus