diff options
Diffstat (limited to 'testhal/STM32/I2C/tmp75.c')
| -rw-r--r-- | testhal/STM32/I2C/tmp75.c | 31 |
1 files changed, 10 insertions, 21 deletions
diff --git a/testhal/STM32/I2C/tmp75.c b/testhal/STM32/I2C/tmp75.c index 4d9923881..cc1b2ca7f 100644 --- a/testhal/STM32/I2C/tmp75.c +++ b/testhal/STM32/I2C/tmp75.c @@ -15,6 +15,8 @@ // input buffer
static i2cblock_t tmp75_rx_data[TMP75_RX_DEPTH];
static i2cblock_t tmp75_tx_data[TMP75_TX_DEPTH];
+// temperature value
+static int16_t temperature = 0;
// Simple error trap
static void i2c_tmp75_error_cb(I2CDriver *i2cp, I2CSlaveConfig *i2cscfg){
@@ -26,47 +28,34 @@ static void i2c_tmp75_error_cb(I2CDriver *i2cp, I2CSlaveConfig *i2cscfg){ /* This callback raise up when transfer finished */
static void i2c_tmp75_cb(I2CDriver *i2cp, I2CSlaveConfig *i2cscfg){
- int16_t temperature = 0;
-
- /* Manually send stop signal to the bus. This is important! */
- i2cMasterStop(i2cp);
- /* unlock bus */
- i2cReleaseBus(&I2CD2);
-
+ (void)*i2cp;
/* store temperature value */
temperature = (i2cscfg->rxbuf[0] << 8) + i2cscfg->rxbuf[1];
-
}
// Fill TMP75 config.
static I2CSlaveConfig tmp75 = {
i2c_tmp75_cb,
i2c_tmp75_error_cb,
- tmp75_rx_data,
- TMP75_RX_DEPTH,
0,
0,
+ tmp75_rx_data,
tmp75_tx_data,
- TMP75_TX_DEPTH,
+ 0b1001000,
+ 7,
0,
0,
- 0b1001000,
- FALSE,
+ {NULL},
};
/* This is main function. */
void request_temperature(void){
- tmp75.txbytes = 0; // set to zero just to be safe
-
- /* tune receiving buffer */
- tmp75.rxbufhead = 0;// point to beginig of buffer
- tmp75.rxbytes = 2; // we need read 2 bytes
+ tmp75.txbytes = 0; // set to zero because we need only reading
+ tmp75.rxbytes = 2; // we need to read 2 bytes
- /* get exclusive access to the bus */
i2cAcquireBus(&I2CD2);
-
- /* start receiving process in background and return */
i2cMasterReceive(&I2CD2, &tmp75);
+ i2cReleaseBus(&I2CD2);
}
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