Starts RIIC master transmission.
Remark 1. This API function handles RIIC master transmission to the slave device at the address specified by the argument adr and the R/W#bit. RIIC master transmission in byte units is repeated the number of times specified by the argument tx_num from the buffer at the location specified by the argument tx_buf.
Remark 2. This API function internally calls R_RIICn_StartCondition to handle processing to start RIIC master transmission.
Remark 3. When performing a RIIC master transmission, R_RIICn_Start must be called before this API function is called.
[Syntax]
#include "r_cg_macrodriver.h"
MD_STATUS R_RIICn_Master_Send ( uint16_t adr, uint8_t * const tx_buf, uint16_t tx_num );
Remark n is the channel number.
[Argument(s)]
|
I/O |
Argument |
Description |
|
I |
uint16_t adr; |
Slave address |
|
I |
uint8_t * const tx_buf; |
Pointer to a buffer storing the transmission data |
|
I |
uint16_t tx_num; |
Total amount of data to send |
[Return value]
|
Macro |
Description |
|
MD_OK |
Normal completion |
|
MD_ERROR1 |
Bus busy |
|
MD_ERROR2 |
Invalid argument adr specification |