Renesas Single-Chip Microcomputer M38C89T-ADF Uživatelský manuál stáhnout pdf (Strana 134)

4BUsage Examples

5.7 Serial Communication Interface

5-18

Rev.1.00 May 22 2012

REJ09B0566

(2) SCI Transmission

Figure 5-9 shows the configuration of SCI channels 0 and 1 and the transmission of data (on channel 0) using polling and then

interrupts.

/* Peripheral driver function prototypes */

#include “r_pdl_sci.h”

#include “r_pdl_cpg.h”

#include “r_pdl_intc.h”

/* PDL device-specific definitions */

#include “r_pdl_definitions.h”

/* Callback function prototype */

void SCI3TxFunc(void);

volatile char result[2];

void main(void)

{

/* Put a null at the end */

result[1] = 0;

/* Initialise the system clocks */

R_CPG_Set(18E6, 144E6, 36E6, PDL_CPG_CK_2, PDL_CPG_OUT_CK_01);

/* Set the CPU’s Interrupt Priority Level to 0 */

R_INTC_Write(

PDL_INTC_REG_IPR,

);

/* configure SCIF_3 in asynchronous serial Mode. Configured it as a transmitter with

BAUD rate of 19200, 8 bit data, no parity and 1 stop bit */

R_SCI_Create(3,

PDL_SCI_ASYNC | PDL_SCI_TX_CONNECTED |

PDL_SCI_8_BIT_LENGTH ,

19200,3,0);

/* configure SCIF_0 in asynchronous serial Mode. Configured it as a receiver with

BAUD rate of 19200, 8 bit data, no parity and 1 stop bit */

R_SCI_Create(1,

PDL_SCI_ASYNC | PDL_SCI_RX_CONNECTED |

PDL_SCI_8_BIT_LENGTH ,

19200,3,0);

/* Wait for 1 character to be received on channel 1 */

R_SCI_Receive(

result,

PDL_NO_FUNC,

PDL_NO_FUNC

);

/* Send a string on channel 3 (wait for completion) */

R_SCI_Send(

“Renesas SH7267”,

PDL_SCI_IDLE,

PDL_NO_FUNC

);

/* Send another string on channel 3 */

R_SCI_Send(

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