OBD_BleBox/BleCanBoxCode/NRF51802/examples/ble_peripheral/ble_app_z5x/spi.c

#include "nrf_drv_spis.h"
#include "ble_gap.h"
#include "type.h"
#include "queue.h"
#include "spi.h"
#include "flash.h"
#include "nrf_delay.h"


#define SPIS_CLK_PIN            1
#define SPIS_MOSI_PIN           2
#define SPIS_MISO_PIN           3
#define SPIS_CS_PIN             4
#define SPIS_INT_PIN            5
#define SPIS_INSTANCE           1

static const nrf_drv_spis_t spis = NRF_DRV_SPIS_INSTANCE(SPIS_INSTANCE);/**< SPIS insta nce. */

volatile bool    m_spi_recv_done = false; /**< Flag used to indicate that SPIS instance completed the transfer. */
volatile bool    spis_eint_on    = false;
volatile bool    m_spi_send_done = true;

static uint8_t   m_tx_buf[MAX_BUF];       /**< TX buffer. */
static uint8_t   m_rx_buf[MAX_BUF];       /**< RX buffer. */

extern queue_list_t g_s_spi_msg_recv_list;


static int _time_out_count = 0;
void _time_out_init(int time)
{
    _time_out_count = time;
}

bool _time_out_check(void)
{
    nrf_delay_us(1000);
    _time_out_count --;
    return (_time_out_count == 0) ? true:false;
}

#define TIME_OUT_MS_RESET(T)  _time_out_init(T)
#define TIME_OUT_CHECK()      _time_out_check()


static void spis_event_handler(nrf_drv_spis_event_t event)
{
    // SPI transaction has been completed
    if (event.evt_type == NRF_DRV_SPIS_XFER_DONE)
    {
        if(spis_eint_on)
        {
            spis_eint_on = false;
            nrf_gpio_pin_clear(SPIS_INT_PIN);
        }
        if(event.rx_amount > 0)
        {
            if(m_rx_buf[0] == 0 && m_rx_buf[1] == 0)  // this package is send to ST, and done, can send next
            {
                m_spi_send_done = true;
            }
            else
            {
                m_spi_recv_done = true;
                queue_in(&g_s_spi_msg_recv_list, m_rx_buf, event.rx_amount);
            }
            memset(m_rx_buf,0,MAX_BUF);
        }
    }
}



void spis_send_data(uint8_t* data, uint16_t length)
{
    m_spi_send_done = false;
    TIME_OUT_MS_RESET(1000);
    memset(m_tx_buf, 0, MAX_BUF);
    memcpy(m_tx_buf, data, length);
    spis_eint_on = true;
    nrf_gpio_pin_set(SPIS_INT_PIN);
    while(!m_spi_send_done && !TIME_OUT_CHECK());
}

static void spis_inter_pin_init(void)
{
    nrf_gpio_cfg_output(SPIS_INT_PIN);
    nrf_gpio_pin_clear(SPIS_INT_PIN);
}

void spis_init(void)
{

    spis_inter_pin_init();
	
    nrf_drv_spis_config_t spis_config = NRF_DRV_SPIS_DEFAULT_CONFIG(SPIS_INSTANCE);
	
    spis_config.sck_pin = SPIS_CLK_PIN;
    spis_config.mosi_pin = SPIS_MOSI_PIN;
    spis_config.miso_pin = SPIS_MISO_PIN;
    spis_config.csn_pin = SPIS_CS_PIN;
    spis_config.csn_pullup = NRF_GPIO_PIN_PULLUP;
    spis_config.miso_drive = NRF_GPIO_PIN_H0H1;
    spis_config.mode = NRF_DRV_SPIS_MODE_3;
		
    APP_ERROR_CHECK(nrf_drv_spis_init(&spis, &spis_config, spis_event_handler));
    APP_ERROR_CHECK(nrf_drv_spis_buffers_set(&spis, m_tx_buf, MAX_BUF, m_rx_buf, MAX_BUF));
}

void spis_pin_reset(void)
{
    if(spis_eint_on)
    {
        spis_eint_on = false;
        nrf_gpio_pin_clear(SPIS_INT_PIN);
    }
}