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nrf51: fix returns and error codes in periph/i2c

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This commit is contained in:
smlng 2017-11-13 13:38:47 +01:00
parent ba6f2a4c4f
commit 1540ec0509
1 changed files with 16 additions and 5 deletions
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21
cpu/nrf51/periph/i2c.c
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@ -67,9 +67,13 @@ static int error(i2c_t bus)
static int write(i2c_t bus, uint8_t addr, const void *data, int len, int stop)
{
assert(len > 0);
if (!(bus < I2C_NUMOF)) {
return -1;
}
uint8_t *buf = (uint8_t *)data;
assert((bus <= I2C_NUMOF) && (len > 0));
DEBUG("i2c: writing %i byte to the bus\n", len);
dev(bus)->ADDRESS = (addr & 0x7f);
@ -98,7 +102,7 @@ static int write(i2c_t bus, uint8_t addr, const void *data, int len, int stop)
int i2c_init_master(i2c_t bus, i2c_speed_t speed)
{
if (bus >= I2C_NUMOF) {
if (!(bus < I2C_NUMOF)) {
return -1;
}
if (speed & INVALID_SPEED_MASK) {
@ -128,14 +132,18 @@ int i2c_init_master(i2c_t bus, i2c_speed_t speed)
int i2c_acquire(i2c_t bus)
{
assert(bus <= I2C_NUMOF);
if (!(bus < I2C_NUMOF)) {
return -1;
}
mutex_lock(&locks[bus]);
return 0;
}
int i2c_release(i2c_t bus)
{
assert(bus <= I2C_NUMOF);
if (!(bus < I2C_NUMOF)) {
return -1;
}
mutex_unlock(&locks[bus]);
return 0;
}
@ -147,9 +155,12 @@ int i2c_read_byte(i2c_t bus, uint8_t address, void *data)
int i2c_read_bytes(i2c_t bus, uint8_t address, void *data, int length)
{
assert(length > 0);
if (!(bus < I2C_NUMOF)) {
return -1;
}
uint8_t *in_buf = (uint8_t *)data;
assert((bus <= I2C_NUMOF) && (length > 0));
DEBUG("[i2c] reading %i byte from the bus\n", length);
/* set the client address */