簡易I2Cについて

#include "hal_data.h"

FSP_CPP_HEADER
void R_BSP_WarmStart(bsp_warm_start_event_t event);
FSP_CPP_FOOTER

volatile int g_i2c_tx_flag = 0;
volatile int g_i2c_rx_flag = 0;

/*******************************************************************************************************************//**
 * main() is generated by the RA Configuration editor and is used to generate threads if an RTOS is used.  This function
 * is called by main() when no RTOS is used.
 **********************************************************************************************************************/
void hal_entry(void)
{
    /* TODO: add your own code here */

    fsp_err_t err;
    unsigned char tx_buffer[10] = {0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0x10};

    R_SCI_I2C_Open(&g_i2c9_ctrl, &g_i2c9_cfg);

    g_i2c_tx_flag = 0;
    err = R_SCI_I2C_Write(&g_i2c9_ctrl, &tx_buffer[0], 1, false);

    if (err != FSP_SUCCESS)
    {
        __NOP();
    }

    while(1)
    {
        //送信完了待ち
        if (g_i2c_tx_flag == 1) break;
    }

    while(1)
    {
        __NOP();    //送信完了
    }

#if BSP_TZ_SECURE_BUILD
    /* Enter non-secure code */
    R_BSP_NonSecureEnter();
#endif
}

/*******************************************************************************************************************//**
 * This function is called at various points during the startup process.  This implementation uses the event that is
 * called right before main() to set up the pins.
 *
 * @param[in]  event    Where at in the start up process the code is currently at
 **********************************************************************************************************************/
void R_BSP_WarmStart(bsp_warm_start_event_t event)
{
    if (BSP_WARM_START_RESET == event)
    {
#if BSP_FEATURE_FLASH_LP_VERSION != 0

        /* Enable reading from data flash. */
        R_FACI_LP->DFLCTL = 1U;

        /* Would normally have to wait tDSTOP(6us) for data flash recovery. Placing the enable here, before clock and
         * C runtime initialization, should negate the need for a delay since the initialization will typically take more than 6us. */
#endif
    }

    if (BSP_WARM_START_POST_C == event)
    {
        /* C runtime environment and system clocks are setup. */

        /* Configure pins. */
        IOPORT_CFG_OPEN (&IOPORT_CFG_CTRL, &IOPORT_CFG_NAME);
    }
}

#if BSP_TZ_SECURE_BUILD

FSP_CPP_HEADER
BSP_CMSE_NONSECURE_ENTRY void template_nonsecure_callable ();

/* Trustzone Secure Projects require at least one nonsecure callable function in order to build (Remove this if it is not required to build). */
BSP_CMSE_NONSECURE_ENTRY void template_nonsecure_callable ()
{

}
FSP_CPP_FOOTER

#endif

void sci_i2c_master_callback(i2c_master_callback_args_t * p_args)
{
    //SLAVEを接続していない場合
    //割り込みには飛んでくるが
    //p_args->event == I2C_MASTER_EVENT_ABORTED

    if (p_args->event == I2C_MASTER_EVENT_TX_COMPLETE)
    {
        g_i2c_tx_flag = 1;
    }
    else if (p_args->event == I2C_MASTER_EVENT_RX_COMPLETE)
    {
        g_i2c_rx_flag = 1;
    }
}