sam3 i2c: fix slave address setting.

[bertos.git] / bertos / cpu / cortex-m3 / drv / i2c_sam3.c

diff --git a/bertos/cpu/cortex-m3/drv/i2c_sam3.c b/bertos/cpu/cortex-m3/drv/i2c_sam3.c
index 9e9ba6f42df3e5a96e61194bb21f93a145895d3b..23ebb3d2d7201133bf764c544392b5351c1f271a 100644 (file)
--- a/bertos/cpu/cortex-m3/drv/i2c_sam3.c
+++ b/bertos/cpu/cortex-m3/drv/i2c_sam3.c
@@ -121,9 +121,9 @@ static void i2c_sam3_start(struct I2c *i2c, uint16_t slave_addr)
        i2c->hw->first_xtranf = true;
 
        if (I2C_TEST_START(i2c->flags) == I2C_START_R)
-               HWREG(i2c->hw->base + TWI_MMR_OFF) = TWI_MMR_DADR(slave_addr) | TWI_MMR_MREAD;
+               HWREG(i2c->hw->base + TWI_MMR_OFF) = TWI_MMR_DADR(slave_addr >> 1) | TWI_MMR_MREAD;
        else
-               HWREG(i2c->hw->base + TWI_MMR_OFF) = TWI_MMR_DADR(slave_addr);
+               HWREG(i2c->hw->base + TWI_MMR_OFF) = TWI_MMR_DADR(slave_addr >> 1);
 }
 
 static void i2c_sam3_putc(I2c *i2c, const uint8_t data)