Spi1 Slave Programming Example - Cypress WICED CYW920706WCDEVAL Hardware User's Manual

wiced_hal_pspi_init( MASTER, GPIO_PULL_UP, MASTER1_P24_CLK_P27_MOSI_P25_MISO,
SPIFFY_SPEED, SPI_MSB_FIRST, SPI_SS_ACTIVE_LOW, SPI_MODE_3, WICED_GPIO_33 );
/* Send a byte and receive a byte from slave*/
test_spiffy1_master_send_receive_byte( 1 );
}
/* Sends one byte and receives one byte from the SPI slave.
* byteToSend - The byte to send to the slave.
* Returns the byte received from the slave.
*/
uint8_t test_spiffy1_master_send_receive_byte( uint8_t byteToSend )
{
uint8_t byteReceived;
/* Assert chipselect by driving O/P on the GPIO */
wiced_hal_gpio_set_pin_output( WICED_GPIO_15, SPIFFY_CS_ASSERT);
/* Tx one byte of data */
wiced_hal_pspi_tx_data( 1, &byteToSend );
/* Rx one byte of data */
wiced_hal_pspi_rx_data( 1, &byteReceived );
/* Deassert chipselect */
wiced_hal_gpio_set_pin_output( WICED_GPIO_15, SPIFFY_CS_DEASSSERT );
}

10.3 SPI1 Slave Programming Example

The following code shows how to initialize SPI1 as a slave, write a byte to a SPI master, and read a byte from a SPI master.
#include "wiced_hal_pspi.h"
#define SLAVE1_P36_CS_P24_CLK_P27_MOSI_P25_MISO
peripherals doc */
#define SPIFFY_SPEED
void test_pspi_driver( void )
{
/* Initialize spiffy1 in slave role, available pin combinations are in spiffydriver.h
DO NOT CONFIGURE csPin in SLAVE mode - the HW takes care of this.
to configure the speed too - the master selects the speed.
*/
wiced_hal_pspi_init( SLAVE, GPIO_PULL_DOWN,
SLAVE1_P36_CS_P24_CLK_P27_MOSI_P25_MISO,
SPIFFY_SPEED, SPI_MSB_FIRST,
SPI_SS_ACTIVE_LOW, SPI_MODE_3,
WICED_GPIO_03 );
/* Rx a byte from master, increment and Tx it back to master*/
test_spiffy1_slave_send_receive_byte( );
}
/* Receives a byte from the SPI master, increments the byte and sends it back
* byteToSend - The byte to send to the slave.
* Returns the byte received from the slave.
CYW920706WCDEVAL Hardware User Guide
Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com.
Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from
Interface Programming Information and Examples
0x24181b19
1000000
Doc. No.: 002-16535 Rev. **
/* Refer Hardware
/* Use 1M speed */
There is no need
39