User`s manual

RX62N Group, RX621 Group 4. Library Reference
Remarks
•
If a callback function is specified, interrupts are used.
Use R_IIC_GetStatus in the callback function to identify the activity that has occurred.
Please see the notes on callback function usage in §6.
•
If no callback function is specified, this function will read the status flags to monitor the bus
activity. Use R_IIC_GetStatus to identify the activity that has occurred.
If the I²C channel’s control registers are directly modified by the user, this function may lock up.
•
If the master sends more data than is expected and the DMAC / DTC trigger is disabled, this
function will issue a NACK to the master.
•
When a Stop condition is detected, if the DMAC or DTC is used for transferring data, use
R_DMAC_Control or R_DTC_Control to re-set the address and count before the next transfer
begins.
•
False will be returned if the DMAC channel has not been allocated using R_DMAC_Create.
Program example
/* RPDL definitions */
#include "r_pdl_iic.h"
/* RPDL device-specific definitions */
#include "r_pdl_definitions.h"
volatile uint8_t data_array[5];
void func(void)
{
/* Monitor channel 0, using polling */
R_IIC_SlaveMonitor(
0,
PDL_NO_DATA,
data_array,
5,
PDL_NO_FUNC,
0
);
}
R20UT0084EE0112 Rev.1.12 Page 4-199
July. 16, 2014