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stm32: i2c: actually keep bit 14 set as per datasheet.

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Old code did three writes, new way actually seems to follow datasheet
properly.
This commit is contained in:
Karl Palsson 2014-08-15 10:04:59 +00:00
parent 4ff07df7b2
commit 4c190a3fa3
1 changed files with 4 additions and 3 deletions
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7
lib/stm32/common/i2c_common_all.c
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@ -147,9 +147,10 @@ This sets an address for Slave mode operation, in 7 bit form.
void i2c_set_own_7bit_slave_address(uint32_t i2c, uint8_t slave)
{
I2C_OAR1(i2c) = (uint16_t)(slave << 1);
I2C_OAR1(i2c) &= ~I2C_OAR1_ADDMODE;
I2C_OAR1(i2c) |= (1 << 14); /* Datasheet: always keep 1 by software. */
uint16_t val = (uint16_t)(slave << 1);
/* Datasheet: always keep 1 by software. */
val |= (1 << 14);
I2C_OAR1(i2c) = val;
}
/*---------------------------------------------------------------------------*/