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i2c: Fix endian issue

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This commit is contained in:
Sebastian Huber
2014-11-24 11:55:44 +01:00
parent 55db0e52be
commit cfc53c11b3
1 changed files with 14 additions and 9 deletions
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23
cpukit/dev/i2c/gpio-nxp-pca9535.c
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@@ -43,22 +43,27 @@ static int gpio_nxp_pca9535_get_reg(
uint16_t *val
)
{
uint8_t buf[1] = { port };
uint8_t out[1] = { port };
uint8_t in[sizeof(*val)];
i2c_msg msgs[2] = {
{
.addr = dev->address,
.flags = 0,
.len = (uint16_t) sizeof(buf),
.buf = &buf[0]
.len = (uint16_t) sizeof(out),
.buf = &out[0]
}, {
.addr = dev->address,
.flags = I2C_M_RD,
.len = (uint16_t) sizeof(*val),
.buf = (uint8_t *) val
.len = (uint16_t) sizeof(in),
.buf = &in[0]
}
};
int err;
return i2c_bus_transfer(dev->bus, &msgs[0], RTEMS_ARRAY_SIZE(msgs));
err = i2c_bus_transfer(dev->bus, &msgs[0], RTEMS_ARRAY_SIZE(msgs));
*val = in[0] | (in[1] << 8);
return err;
}
static int gpio_nxp_pca9535_set_reg(
@@ -67,13 +72,13 @@ static int gpio_nxp_pca9535_set_reg(
uint16_t val
)
{
uint8_t buf[3] = { port, (uint8_t) val, (uint8_t) (val >> 8) };
uint8_t out[3] = { port, (uint8_t) val, (uint8_t) (val >> 8) };
i2c_msg msgs[1] = {
{
.addr = dev->address,
.flags = 0,
.len = (uint16_t) sizeof(buf),
.buf = &buf[0]
.len = (uint16_t) sizeof(out),
.buf = &out[0]
}
};