4.2.1 Configuring Board Support Package

Perform the following changes in the Board Support Package (BSP).

1. Add the following code in the “wifi_PIC24F_WINC15x0\wifi_PIC24F_WINC15x0.X\ \winc1500\bsp\include\nm_bsp_internal.h”.

   #ifdef _PIC24_
   #include "bsp/include/nm_bsp_PIC24.h"
   #endif

2. Modify the following set of functions in the nm_bus_wrapper_PIC24.c file based on the PIC24 MCU BSP.
   • nm_bsp_init – This function is used to initialize the BSP to prepare the ATWINC before it starts working.
   • nm_bsp_deinit – This function is used to de-initialize the BSP.
   • nm_bsp_reset – This function is used to reset the ATWINC board by setting the CHIP_EN and RESET_N signals low, and, after a specific delay, the function sets the CHIP_EN high, then sets RESET_N high.
   • nm_bsp_sleep – This function is used to set the host to sleep for the specified duration.
   • nm_bsp_register_isr – This function is used to register the host interface interrupt service routine.
   • nm_bsp_interrupt_ctrl – This function is used to enable/disable the interrupt.

     The following is the modified nm_bus_wrapper_PIC24.c file source code.

     #include "../mcc_generated_files/mcc.h"
     #include <stdio.h>
     #include "bsp/include/nm_bsp.h"
     #include "common/include/nm_common.h"
     #include "bus_wrapper/include/nm_bus_wrapper.h"
     #include "conf_winc.h"
     
     #define NM_BUS_MAX_TRX_SZ	256
     
     tstrNmBusCapabilities egstrNmBusCapabilities =
     {
     	NM_BUS_MAX_TRX_SZ
     };
     #ifdef CONF_WINC_USE_SPI
     static sint8 spi_rw(uint8* pu8Mosi, uint8* pu8Miso, uint16 u16Sz)
     {
         
     	uint8 u8Dummy = 0;
     	uint8 u8SkipMosi = 0, u8SkipMiso = 0;
     	uint16_t txd_data = 0;
     	uint16_t rxd_data = 0;
     
     	if (!pu8Mosi) {
     		pu8Mosi = &u8Dummy;
     		u8SkipMosi = 1;
     	}
     	else if(!pu8Miso) {
     		pu8Miso = &u8Dummy;
     		u8SkipMiso = 1;
     	}
     	else {
     		return M2M_ERR_BUS_FAIL;
     	}
     
     	//spi_select_slave(&master, &slave_inst, true);
         WINC_SPI_SELECT_SLAVE;
         
     	while (u16Sz) {
     		txd_data = *pu8Mosi;
             rxd_data = WINC_SPI_TRANSCEIVE(txd_data);
     
             *pu8Miso = rxd_data;
     
     		u16Sz--;
     		if (!u8SkipMiso)
     			pu8Miso++;
     		if (!u8SkipMosi)
     			pu8Mosi++;
     	}
     
         WINC_SPI_UNSELECT_SLAVE;
         
     	return M2M_SUCCESS;
     }
     #endif
     /**	@fn		nm_bus_init
     *	@brief	Initialize the bus wrapper
     *	@return	M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
     */
     sint8 nm_bus_init(void *pvinit)
     {
     	sint8 result = M2M_SUCCESS;
          // Make sure that the slave is unselected.
         WINC_SPI_UNSELECT_SLAVE;   
         // SPI Should already be enabled via MCC init code
     	nm_bsp_reset();
     	nm_bsp_sleep(1);
     	return result;
     }
     /*
     *	@fn		nm_bus_ioctl
     *	@brief	send/receive from the bus
     *	@param[IN]	u8Cmd
     *					IOCTL command for the operation
     *	@param[IN]	pvParameter
     *					Arbitrary parameter depenging on IOCTL
     *	@return	M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
     *	@note	For SPI only, it's important to be able to send/receive at the same time
     */
     sint8 nm_bus_ioctl(uint8 u8Cmd, void* pvParameter)
     {
     	sint8 s8Ret = 0;
     	switch(u8Cmd)
     	{
     #ifdef defined CONF_WINC_USE_SPI
     		case NM_BUS_IOCTL_RW: {
     			tstrNmSpiRw *pstrParam = (tstrNmSpiRw *)pvParameter;
     			s8Ret = spi_rw(pstrParam->pu8InBuf, pstrParam->pu8OutBuf, pstrParam->u16Sz);
     		}
     		break;
     #endif
     		default:
     			s8Ret = -1;
     			M2M_ERR("invalide ioclt cmd\n");
     			break;
     	}
     	return s8Ret;
     }
     /*
     *	@fn		nm_bus_deinit
     *	@brief	De-initialize the bus wrapper
     */
     sint8 nm_bus_deinit(void)
     {
     	sint8 result = M2M_SUCCESS;
     	return result;
     }
     
     /*
     *	@fn			nm_bus_reinit
     *	@brief		re-initialize the bus wrapper
     *	@param [in]	void *config
     *					re-init configuration data
     *	@return		M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
     *	@author		Dina El Sissy
     *	@date		19 Sept 2012
     *	@version	1.0
     */
     sint8 nm_bus_reinit(void* config)
     {
     	return M2M_SUCCESS;
     }