void platform_init_external_devices( void )
{
/* This function initializes the external interfaces for the platform.
You could use this to initialize the peripherals you use.
Note however that if you initialize alternative functionality of
JTAG and UART pins, you could lock yourself out of being able to flash
new firmware.
Also, if WICED_BUTTON1 and WICED_BUTTON2 are not available, you are
unable to use the bootloader patch to halt execution in the bootloader,
a meathod to allow you to use JTAG for flashing even if you use those
pins for other things.
*/
/* Initialise LEDs and turn off by default */
platform_gpio_init( &platform_gpio_pins[WICED_LED1], OUTPUT_PUSH_PULL );
platform_gpio_init( &platform_gpio_pins[WICED_LED2], OUTPUT_PUSH_PULL );
platform_gpio_output_low( &platform_gpio_pins[WICED_LED1] );
platform_gpio_output_low( &platform_gpio_pins[WICED_LED2] );
/* Initialise buttons to input by default */
platform_gpio_init( &platform_gpio_pins[WICED_BUTTON1], INPUT_PULL_UP );
platform_gpio_init( &platform_gpio_pins[WICED_BUTTON2], INPUT_PULL_UP );
//platform_gpio_init( &platform_gpio_pins[WICED_SWITCH1], INPUT_PULL_UP );
platform_gpio_init( &platform_gpio_pins[WICED_SWITCH2], INPUT_PULL_UP );
platform_gpio_init( &platform_gpio_pins[WICED_SWITCH3], INPUT_PULL_UP );
platform_gpio_init( &platform_gpio_pins[WICED_SWITCH4], INPUT_PULL_UP );
#ifndef WICED_DISABLE_STDIO
/* Initialise UART standard I/O */
platform_stdio_init( &platform_uart_drivers[STDIO_UART], &platform_uart_peripherals[STDIO_UART], &stdio_config );
#endif
}
wwd_result_t host_platform_bus_init( void )
{
if ( sdio_bus_initted == WICED_FALSE )
{
uint8_t a = 0;
platform_mcu_powersave_disable();
/* SDIO bootstrapping: GPIO0 = 0 and GPIO1 = 0 */
#ifdef WICED_WIFI_USE_GPIO_FOR_BOOTSTRAP
platform_gpio_init( &wifi_control_pins[WWD_PIN_BOOTSTRAP_0], OUTPUT_PUSH_PULL );
platform_gpio_output_low( &wifi_control_pins[WWD_PIN_BOOTSTRAP_0] );
platform_gpio_init( &wifi_control_pins[WWD_PIN_BOOTSTRAP_1], OUTPUT_PUSH_PULL );
platform_gpio_output_low( &wifi_control_pins[WWD_PIN_BOOTSTRAP_1] );
#endif /* WICED_WIFI_USE_GPIO_FOR_BOOTSTRAP */
/* Setup SDIO pins */
for ( a = WWD_PIN_SDIO_CLK; a < WWD_PIN_SDIO_MAX; a++ )
{
if( a == WWD_PIN_SDIO_OOB_IRQ )
{
platform_gpio_peripheral_pin_init( &wifi_sdio_pins[a], 0 );
}
else
{
platform_gpio_peripheral_pin_init( &wifi_sdio_pins[a], ( IOPORT_MODE_MUX_C | IOPORT_MODE_PULLUP ));
}
}
/* Enable the MCI peripheral */
sysclk_enable_peripheral_clock( ID_HSMCI );
HSMCI->HSMCI_CR = HSMCI_CR_SWRST;
MCI_Disable( HSMCI );
MCI_Init( &sdio_driver, HSMCI, ID_HSMCI, CPU_CLOCK_HZ );
/* Enable SDIO interrupt */
/* Priority must be set in platform.c file function platform_init_peripheral_irq_priorities */
/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
// NVIC_SetPriority( HSMCI_IRQn, SAM4S_SDIO_IRQ_PRIO );
NVIC_EnableIRQ( HSMCI_IRQn );
// host_rtos_init_semaphore( &sdio_transfer_done_semaphore );
// enable_sdio_block_transfer_done_irq();
platform_mcu_powersave_enable();
sdio_bus_initted = WICED_TRUE;
}
return WICED_SUCCESS;
}
/* Checks if a factory reset is requested */
wiced_bool_t platform_check_factory_reset( void )
{
uint32_t factory_reset_counter = 0;
int led_state = 0;
while ( ( 0 == platform_gpio_input_get( &platform_gpio_pins[ WICED_BUTTON1 ] ) )
&& ( ( factory_reset_counter += 100 ) <= 5000 )
/* &&( WICED_SUCCESS == (wiced_result_t)host_rtos_delay_milliseconds( 100 ) ) */
)
{
/* Factory reset button is being pressed. */
/* User Must press it for 5 seconds to ensure it was not accidental */
/* Toggle LED every 100ms */
if ( led_state == 0 )
{
platform_gpio_output_high( &platform_gpio_pins[ WICED_LED1 ] );
led_state = 1;
}
else
{
platform_gpio_output_low( &platform_gpio_pins[ WICED_LED1 ] );
led_state = 0;
}
if ( factory_reset_counter == 5000 )
{
return WICED_TRUE;
}
}
return WICED_FALSE;
}
/* Checks if a factory reset is requested */
wiced_bool_t platform_check_factory_reset( void )
{
uint32_t factory_reset_counter = 0;
#ifndef GPIO_LED_NOT_SUPPORTED
int led_state = 0;
#endif
while ( ( 0 == platform_gpio_input_get( &platform_gpio_pins[ WICED_BUTTON1 ] ) )
&&( ( factory_reset_counter += PLATFORM_FACTORY_RESET_CHECK_PERIOD ) <= PLATFORM_FACTORY_RESET_TIMEOUT )
&&( WICED_SUCCESS == (wiced_result_t)host_rtos_delay_milliseconds( PLATFORM_FACTORY_RESET_CHECK_PERIOD ) )
)
{
/* Factory reset button is being pressed. */
/* User Must press it for 5 seconds to ensure it was not accidental */
#ifndef GPIO_LED_NOT_SUPPORTED
/* Toggle LED every 100ms */
if ( led_state == 0 )
{
platform_gpio_output_high( &platform_gpio_pins[ WICED_LED1 ] );
led_state = 1;
}
else
{
platform_gpio_output_low( &platform_gpio_pins[ WICED_LED1 ] );
led_state = 0;
}
#endif
if ( factory_reset_counter == 5000 )
{
return WICED_TRUE;
}
}
return WICED_FALSE;
}
OSStatus host_platform_spi_transfer( bus_transfer_direction_t dir, uint8_t* buffer, uint16_t buffer_length )
{
OSStatus result;
pdc_packet_t pdc_spi_packet = { (uint32_t)buffer, buffer_length };
Pdc* spi_pdc = spi_get_pdc_base( wifi_spi.port );
platform_mcu_powersave_disable();
platform_gpio_output_low( &wifi_spi_pins[WIFI_PIN_SPI_CS] );
pdc_tx_init( spi_pdc, &pdc_spi_packet, NULL);
if ( dir == BUS_READ ) {
pdc_rx_init( spi_pdc, &pdc_spi_packet, NULL);
spi_enable_interrupt(wifi_spi.port, SPI_IER_RXBUFF );
pdc_enable_transfer( spi_pdc, PERIPH_PTCR_TXTEN | PERIPH_PTCR_RXTEN );
}
if ( dir == BUS_WRITE ) {
spi_enable_interrupt( wifi_spi.port, SPI_IER_ENDTX );
pdc_enable_transfer( spi_pdc, PERIPH_PTCR_TXTEN );
}
result = mico_rtos_get_semaphore( &spi_transfer_finished_semaphore, 100 );
platform_gpio_output_high( &wifi_spi_pins[WIFI_PIN_SPI_CS] );
platform_mcu_powersave_enable();
return result;
}
void platform_init_external_devices( void )
{
/* Initialise LEDs and turn off by default */
platform_gpio_init( &platform_gpio_pins[WICED_LED1], OUTPUT_PUSH_PULL );
platform_gpio_init( &platform_gpio_pins[WICED_LED2], OUTPUT_PUSH_PULL );
platform_gpio_output_low( &platform_gpio_pins[WICED_LED1] );
platform_gpio_output_low( &platform_gpio_pins[WICED_LED2] );
/* Initialise buttons to input by default */
platform_gpio_init( &platform_gpio_pins[WICED_BUTTON1], INPUT_PULL_UP );
platform_gpio_init( &platform_gpio_pins[WICED_BUTTON2], INPUT_PULL_UP );
#ifndef WICED_DISABLE_STDIO
/* Initialise UART standard I/O */
platform_stdio_init( &platform_uart_drivers[STDIO_UART], &platform_uart_peripherals[STDIO_UART], &stdio_config );
#endif
}
void host_platform_reset_wifi( bool reset_asserted )
{
#if defined (MICO_USE_WIFI_RESET_PIN )
( reset_asserted == true ) ? platform_gpio_output_low( &wifi_control_pins[ WIFI_PIN_RESET ] ) : platform_gpio_output_high( &wifi_control_pins[ WIFI_PIN_RESET ] );
#else
UNUSED_PARAMETER( reset_asserted );
#endif
}
uint32_t platform_get_factory_reset_button_time ( uint32_t max_time )
{
uint32_t button_press_timer = 0;
int led_state = 0;
/* Initialise input */
platform_gpio_init( &platform_gpio_pins[ PLATFORM_FACTORY_RESET_BUTTON_GPIO ], INPUT_PULL_UP );
while ( (PLATFORM_FACTORY_RESET_PRESSED_STATE == platform_gpio_input_get(&platform_gpio_pins[ PLATFORM_FACTORY_RESET_BUTTON_GPIO ])) )
{
/* How long is the "Factory Reset" button being pressed. */
host_rtos_delay_milliseconds( PLATFORM_FACTORY_RESET_CHECK_PERIOD );
/* Toggle LED every PLATFORM_FACTORY_RESET_CHECK_PERIOD */
if ( led_state == 0 )
{
platform_gpio_output_high( &platform_gpio_pins[ PLATFORM_FACTORY_RESET_LED_GPIO ] );
led_state = 1;
}
else
{
platform_gpio_output_low( &platform_gpio_pins[ PLATFORM_FACTORY_RESET_LED_GPIO ] );
led_state = 0;
}
button_press_timer += PLATFORM_FACTORY_RESET_CHECK_PERIOD;
if ((max_time > 0) && (button_press_timer >= max_time))
{
break;
}
}
/* turn off the LED */
if (PLATFORM_FACTORY_RESET_LED_ON_STATE == 1)
{
platform_gpio_output_low( &platform_gpio_pins[ PLATFORM_FACTORY_RESET_LED_GPIO ] );
}
else
{
platform_gpio_output_high( &platform_gpio_pins[ PLATFORM_FACTORY_RESET_LED_GPIO ] );
}
return button_press_timer;
}
void host_platform_power_wifi( bool power_enabled )
{
#if defined ( MICO_USE_WIFI_POWER_PIN ) && defined ( MICO_USE_WIFI_POWER_PIN_ACTIVE_HIGH )
( power_enabled == true ) ? platform_gpio_output_high( &wifi_control_pins[WIFI_PIN_POWER] ) : platform_gpio_output_low ( &wifi_control_pins[WIFI_PIN_POWER] );
#elif defined ( MICO_USE_WIFI_POWER_PIN )
( power_enabled == true ) ? platform_gpio_output_low ( &wifi_control_pins[WIFI_PIN_POWER] ) : platform_gpio_output_high( &wifi_control_pins[WIFI_PIN_POWER] );
#else
UNUSED_PARAMETER( power_enabled );
#endif
}
OSStatus host_platform_deinit_wlan_powersave_clock( void )
{
#ifndef MICO_USE_WIFI_32K_PIN
return kNoErr;
#else
/* Tie the pin to ground */
platform_gpio_init( &wifi_control_pins[WIFI_PIN_32K_CLK], OUTPUT_PUSH_PULL );
platform_gpio_output_low( &wifi_control_pins[WIFI_PIN_32K_CLK] );
return kNoErr;
#endif
}
void platform_init_external_devices( void )
{
/* Initialise wake up pin */
platform_gpio_init( &platform_gpio_pins[WICED_GPIO_11], INPUT_HIGH_IMPEDANCE );
platform_wakeup_pin_enable( platform_gpio_pins[WICED_GPIO_11].pin, WAKEUP_PIN_ACTIVE_HIGH );
/* Initialise LEDs and turn off by default */
platform_gpio_init( &platform_gpio_pins[WICED_LED1], OUTPUT_PUSH_PULL );
platform_gpio_init( &platform_gpio_pins[WICED_LED2], OUTPUT_PUSH_PULL );
platform_gpio_output_low( &platform_gpio_pins[WICED_LED1] );
platform_gpio_output_low( &platform_gpio_pins[WICED_LED2] );
/* Initialise buttons to input by default */
platform_gpio_init( &platform_gpio_pins[WICED_BUTTON1], INPUT_PULL_UP );
platform_gpio_init( &platform_gpio_pins[WICED_BUTTON2], INPUT_PULL_UP );
#ifndef WICED_DISABLE_STDIO
/* Initialise UART standard I/O */
platform_stdio_init( &platform_uart_drivers[STDIO_UART], &platform_uart_peripherals[STDIO_UART], &stdio_config );
#endif
}
/*****************************************************************************
**
** Function UPIO_Set
**
** Description
** This function sets one or more GPIO devices to the given state.
** Multiple GPIOs of the same type can be masked together to set more
** than one GPIO. This function can only be used on types UPIO_LED and
** UPIO_GENERAL.
**
** Input Parameters:
** type The type of device.
** pio Indicates the particular GPIOs.
** state The desired state.
**
** Output Parameter:
** None.
**
** Returns:
** None.
**
*****************************************************************************/
UDRV_API void UPIO_Set( tUPIO_TYPE type, tUPIO pio, tUPIO_STATE state )
{
//DRV_TRACE_DEBUG2("UPIO_Set %d, %s", pio, UPIO_OFF == state ? "UPIO_OFF" : "UPIO_ON");
#if HCILP_INCLUDED
if(UPIO_OFF == state)
{
platform_gpio_output_low( mico_bt_control_pins[MICO_BT_PIN_DEVICE_WAKE] );
}else
{
platform_gpio_output_high( mico_bt_control_pins[MICO_BT_PIN_DEVICE_WAKE] );
}
#endif
}
void platform_init_external_devices( void )
{
/* This function initializes the external interfaces for the platform.
You could use this to initialize the peripherals you use.
Note however that if you initialize alternative functionality of
JTAG and UART pins, you could lock yourself out of being able to flash
new firmware.
*/
//patch added to resolve the microseconds delay hang issue.
do
{
// enable DWT hardware and cycle counting
CoreDebug->DEMCR = CoreDebug->DEMCR | CoreDebug_DEMCR_TRCENA_Msk;
// reset a counter
DWT->CYCCNT = 0;
// enable the counter
DWT->CTRL = (DWT->CTRL | DWT_CTRL_CYCCNTENA_Msk) ;
}
while(0);
/* Initialise button to input by default */
platform_gpio_init( &platform_gpio_pins[WICED_BUTTON1], INPUT_PULL_UP );
#ifndef GPIO_LED_NOT_SUPPORTED
/* Initialise LEDs and turn off by default */
platform_gpio_init( &platform_gpio_pins[WICED_LED1], OUTPUT_PUSH_PULL );
platform_gpio_init( &platform_gpio_pins[WICED_LED2], OUTPUT_PUSH_PULL );
platform_gpio_output_low( &platform_gpio_pins[WICED_LED1] );
platform_gpio_output_low( &platform_gpio_pins[WICED_LED2] );
#endif
#ifndef WICED_DISABLE_STDIO
/* Initialise UART standard I/O */
platform_stdio_init( &platform_uart_drivers[STDIO_UART], &platform_uart_peripherals[STDIO_UART], &stdio_config );
#endif
}
OSStatus host_platform_spi_transfer( bus_transfer_direction_t dir, uint8_t* buffer, uint16_t buffer_length )
{
OSStatus result;
uint32_t junk;
platform_mcu_powersave_disable();
wifi_spi.tx_dma.stream->NDTR = buffer_length;
wifi_spi.tx_dma.stream->M0AR = (uint32_t) buffer;
if ( dir == BUS_READ )
{
wifi_spi.rx_dma.stream->NDTR = buffer_length;
wifi_spi.rx_dma.stream->M0AR = (uint32_t) buffer;
wifi_spi.rx_dma.stream->CR |= DMA_MemoryInc_Enable | ( 1 << 4);
}
else
{
wifi_spi.rx_dma.stream->NDTR = buffer_length;
wifi_spi.rx_dma.stream->M0AR = (uint32_t) &junk;
wifi_spi.rx_dma.stream->CR &= ( ~DMA_MemoryInc_Enable ) | ( 1 << 4);
}
platform_gpio_output_low( &wifi_spi_pins[WIFI_PIN_SPI_CS] );
DMA_Cmd( wifi_spi.rx_dma.stream, ENABLE );
DMA_Cmd( wifi_spi.tx_dma.stream, ENABLE );
/* Wait for DMA TX to complete */
result = mico_rtos_get_semaphore( &spi_transfer_finished_semaphore, 100 );
// loop_count = 0;
// while ( ( DMA_GetFlagStatus( SPIX_DMA_RX_STREAM, DMA_FLAG_TCIF3 ) == RESET ) && ( loop_count < (uint32_t) DMA_TIMEOUT_LOOPS ) )
// {
// loop_count++;
// }
DMA_Cmd( wifi_spi.rx_dma.stream, DISABLE );
DMA_Cmd( wifi_spi.tx_dma.stream, DISABLE );
/* Clear the CS pin and the DMA status flag */
platform_gpio_output_high( &wifi_spi_pins[WIFI_PIN_SPI_CS] ); /* CS high (to deselect) */
clear_dma_interrupts( wifi_spi.rx_dma.stream, wifi_spi.rx_dma.complete_flags );
clear_dma_interrupts( wifi_spi.tx_dma.stream, wifi_spi.tx_dma.complete_flags );
platform_mcu_powersave_enable();
return result;
}
wwd_result_t host_platform_bus_init( void )
{
/* Setup the interrupt input for WLAN_IRQ */
platform_gpio_init( &wifi_spi_pins[WWD_PIN_SPI_IRQ], INPUT_HIGH_IMPEDANCE );
//platform_gpio_irq_enable( &wifi_control_pins[WWD_PIN_IRQ], IRQ_TRIGGER_RISING_EDGE, spi_irq_handler, 0 );
#ifdef WICED_WIFI_USE_GPIO_FOR_BOOTSTRAP_0
/* Set GPIO_B[1:0] to 01 to put WLAN module into gSPI mode */
platform_gpio_init( &wifi_control_pins[WWD_PIN_BOOTSTRAP_0], OUTPUT_PUSH_PULL );
platform_gpio_output_high( &wifi_control_pins[WWD_PIN_BOOTSTRAP_0] );
#endif
#ifdef WICED_WIFI_USE_GPIO_FOR_BOOTSTRAP_1
platform_gpio_init( &wifi_control_pins[WWD_PIN_BOOTSTRAP_1], OUTPUT_PUSH_PULL );
platform_gpio_output_low( &wifi_control_pins[WWD_PIN_BOOTSTRAP_1] );
#endif
return WICED_SUCCESS;
}
OSStatus platform_gpio_output_trigger( const platform_gpio_t* gpio )
{
OSStatus err = kNoErr;
uint32_t regValue;
uint32_t mask = (uint32_t)1 << gpio->pin;
platform_mcu_powersave_disable();
require_action_quiet( gpio != NULL, exit, err = kParamErr);
regValue = GpioGetReg( GPIO_A_OUT + gpio->port );
(regValue&mask)? platform_gpio_output_low( gpio ) : platform_gpio_output_high( gpio );
exit:
platform_mcu_powersave_enable();
return err;
}
static wiced_result_t h4_rx_worker_receive_packet(void * arg){
#ifdef WICED_BT_UART_MANUAL_CTS_RTS
platform_gpio_output_low(wiced_bt_uart_pins[WICED_BT_PIN_UART_RTS]);
#endif
while (1){
rx_worker_read_pos = 0;
h4_rx_worker_receive_bytes(1);
switch (hci_packet[0]){
case HCI_EVENT_PACKET:
h4_rx_worker_receive_bytes(HCI_EVENT_HEADER_SIZE);
h4_rx_worker_receive_bytes(hci_packet[2]);
break;
case HCI_ACL_DATA_PACKET:
h4_rx_worker_receive_bytes(HCI_ACL_HEADER_SIZE);
h4_rx_worker_receive_bytes(little_endian_read_16( hci_packet, 3));
break;
case HCI_SCO_DATA_PACKET:
h4_rx_worker_receive_bytes(HCI_SCO_HEADER_SIZE);
h4_rx_worker_receive_bytes(hci_packet[3]);
break;
default:
// try again
log_error("h4_rx_worker_receive_packet: invalid packet type 0x%02x", hci_packet[0]);
continue;
}
#ifdef WICED_BT_UART_MANUAL_CTS_RTS
platform_gpio_output_high(wiced_bt_uart_pins[WICED_BT_PIN_UART_RTS]);
#endif
// deliver packet on main thread
btstack_run_loop_wiced_execute_code_on_main_thread(&h4_main_deliver_packet, NULL);
return WICED_SUCCESS;
}
}
platform_result_t platform_spi_transfer( const platform_spi_t* spi, const platform_spi_config_t* config, const platform_spi_message_segment_t* segments, uint16_t number_of_segments )
{
int i = 0;
platform_result_t result;
platform_mcu_powersave_disable( );
platform_gpio_output_low( config->chip_select );
for ( i = 0; i < number_of_segments; i++ )
{
result = sam4s_spi_transfer_internal( spi, segments[i].tx_buffer, segments[i].rx_buffer, segments[i].length );
if ( result != PLATFORM_SUCCESS )
{
return result;
}
}
platform_gpio_output_high( config->chip_select );
platform_mcu_powersave_enable( );
return PLATFORM_SUCCESS;
}
// Magicoe OSStatus platform_spi_transfer( const platform_spi_t* spi, const platform_spi_config_t* config, const platform_spi_message_segment_t* segments, uint16_t number_of_segments )
OSStatus platform_spi_transfer( platform_spi_driver_t* driver, const platform_spi_config_t* config, const platform_spi_message_segment_t* segments, uint16_t number_of_segments )
{
OSStatus err = kNoErr;
uint32_t count = 0;
uint32_t i;
const platform_spi_message_segment_t *pSeg;
uint32_t dmaXferLen;
DMA_CHDESC_T *pTxDesc, *pRxDesc;
LPC_SPI_T *pSPI;
uint32_t dmaRxChnNdx, dmaTxChnNdx;
const uint8_t *pcTx;
uint8_t *pRx;
require_action_quiet( ( driver != NULL ) && ( config != NULL ) && ( segments != NULL ) && ( number_of_segments != 0 ), exit, err = kParamErr);
// save the driver pointer so that in DMA IRQ callback we can access its members
platform_mcu_powersave_disable();
pSeg = segments;
pTxDesc = (DMA_CHDESC_T *) g_pDMA->SRAMBASE + driver->peripheral->dmaTxChnNdx;
pRxDesc = (DMA_CHDESC_T *) g_pDMA->SRAMBASE + driver->peripheral->dmaRxChnNdx;
pSPI = driver->peripheral->port;
if (pSPI == LPC_SPI0)
s_pSPIDrvs[0] = driver;
dmaRxChnNdx = driver->peripheral->dmaRxChnNdx , dmaTxChnNdx = driver->peripheral->dmaTxChnNdx;
driver->xferErr = 0;
/* Activate chip select */
platform_gpio_output_low( config->chip_select );
for ( i = 0; i < number_of_segments; i++, pSeg++ )
{
// transfer one seg
count = pSeg->length;
if (0 == count)
continue;
pcTx = pSeg->tx_buffer , pRx = pSeg->rx_buffer;
do
{
dmaXferLen = count > DMA_MAX_XFER_CNT ? DMA_MAX_XFER_CNT : count;
count -= dmaXferLen;
driver->isRxDone = driver->isTxDone = 0;
#if 0
{
if (pRx != 0)
{
pSPI->TXCTRL &= ~(1UL<<22);
if (pSPI->STAT & SPI_STAT_RXRDY)
pSPI->RXDAT;
while (dmaXferLen--)
{
while (!(pSPI->STAT & SPI_STAT_TXRDY));
pSPI->TXDAT = *pcTx++;
while (!(pSPI->STAT & SPI_STAT_RXRDY));
*pRx++ = (uint8_t) pSPI->RXDAT;
}
}
else
{
pSPI->TXCTRL |= (1UL<<22);
while (dmaXferLen--)
{
while (!(pSPI->STAT & SPI_STAT_TXRDY));
pSPI->TXDAT = *pcTx++;
}
}
while (!(pSPI->STAT & SPI_STAT_TXRDY));
}
#else
pTxDesc->next = 0;
pTxDesc->dest = DMA_ADDR(&pSPI->TXDAT);
pTxDesc->source = DMA_ADDR(pcTx) + dmaXferLen - 1;
pTxDesc->xfercfg = DMA_XFERCFG_CFGVALID | DMA_XFERCFG_SETINTA |
DMA_XFERCFG_SWTRIG | DMA_XFERCFG_WIDTH_8 | DMA_XFERCFG_SRCINC_1 |
DMA_XFERCFG_DSTINC_0 | DMA_XFERCFG_XFERCOUNT(dmaXferLen);
if (pRx != 0)
{
pSPI->TXCTRL &= ~(1UL<<22);
driver->isRx = 1;
pRxDesc->next = 0;
pRxDesc->source = DMA_ADDR(&pSPI->RXDAT);
pRxDesc->dest = DMA_ADDR(pRx) + dmaXferLen - 1;
pRxDesc->xfercfg = DMA_XFERCFG_CFGVALID | DMA_XFERCFG_SETINTA |
DMA_XFERCFG_SWTRIG | DMA_XFERCFG_WIDTH_8 | DMA_XFERCFG_DSTINC_1 |
DMA_XFERCFG_SRCINC_0 | DMA_XFERCFG_XFERCOUNT(dmaXferLen);
// start RX DMA
g_pDMA->DMACH[dmaRxChnNdx].XFERCFG = pRxDesc->xfercfg;
} else {
driver->isRx = 0;
pSPI->TXCTRL |= (1UL<<22);
}
// start TX DMA
g_pDMA->DMACH[dmaTxChnNdx].XFERCFG = pTxDesc->xfercfg;
#ifndef NO_MICO_RTOS
mico_rtos_get_semaphore(&driver->sem_xfer_done, MICO_WAIT_FOREVER);
#else
while(1)
{
if (driver->isTxDone)
{
if (!driver->isRx || driver->isRxDone)
break;
}
__WFI();
}
#endif
#endif
if (driver->xferErr)
{
err = kGeneralErr;
break;
}
// >>> update read and/or write pointers
pcTx += dmaXferLen;
if (pRx != 0)
pRx += dmaXferLen;
// <<<
} while (count);
}
platform_gpio_output_high( config->chip_select );
exit:
platform_mcu_powersave_enable( );
return err;
}
OSStatus host_platform_bus_init( void )
{
pdc_packet_t pdc_spi_packet;
Pdc* spi_pdc = spi_get_pdc_base( wifi_spi.port );
platform_mcu_powersave_disable( );
mico_rtos_init_semaphore( &spi_transfer_finished_semaphore, 1 );
/* Setup the SPI lines */
platform_gpio_peripheral_pin_init( wifi_spi.mosi_pin, ( wifi_spi.mosi_pin_mux_mode | IOPORT_MODE_PULLUP ) );
platform_gpio_peripheral_pin_init( wifi_spi.miso_pin, ( wifi_spi.miso_pin_mux_mode | IOPORT_MODE_PULLUP ) );
platform_gpio_peripheral_pin_init( wifi_spi.clock_pin, ( wifi_spi.clock_pin_mux_mode | IOPORT_MODE_PULLUP ) );
/* Setup the interrupt input for WLAN_IRQ */
platform_gpio_init( &wifi_spi_pins[WIFI_PIN_SPI_IRQ], INPUT_HIGH_IMPEDANCE );
platform_gpio_irq_enable( &wifi_spi_pins[WIFI_PIN_SPI_IRQ], IRQ_TRIGGER_RISING_EDGE, spi_irq_handler, 0 );
/* Setup SPI slave select GPIOs */
platform_gpio_init( &wifi_spi_pins[WIFI_PIN_SPI_CS], OUTPUT_PUSH_PULL );
platform_gpio_output_high( &wifi_spi_pins[WIFI_PIN_SPI_CS] );
#if defined ( MICO_WIFI_USE_GPIO_FOR_BOOTSTRAP )
/* Set GPIO_B[1:0] to 01 to put WLAN module into gSPI mode */
platform_gpio_init( &wifi_control_pins[WIFI_PIN_BOOTSTRAP_0], OUTPUT_PUSH_PULL );
platform_gpio_output_high( &wifi_control_pins[WIFI_PIN_BOOTSTRAP_0] );
platform_gpio_init( &wifi_control_pins[WIFI_PIN_BOOTSTRAP_1], OUTPUT_PUSH_PULL );
platform_gpio_output_low( &wifi_control_pins[WIFI_PIN_BOOTSTRAP_1] );
#endif
/* Enable the peripheral and set SPI mode. */
flexcom_enable( flexcom_base[ wifi_spi.spi_id ] );
flexcom_set_opmode( flexcom_base[ wifi_spi.spi_id ], FLEXCOM_SPI );
/* Init pdc, and clear RX TX. */
pdc_spi_packet.ul_addr = 0;
pdc_spi_packet.ul_size = 1;
pdc_tx_init( spi_pdc, &pdc_spi_packet, NULL );
pdc_rx_init( spi_pdc, &pdc_spi_packet, NULL );
spi_disable_interrupt(wifi_spi.port, 0xffffffff );
spi_disable( wifi_spi.port );
spi_reset( wifi_spi.port );
spi_set_lastxfer( wifi_spi.port );
spi_set_master_mode( wifi_spi.port );
spi_disable_mode_fault_detect( wifi_spi.port );
spi_set_clock_polarity( wifi_spi.port, 0, SPI_CLK_POLARITY );
spi_set_clock_phase( wifi_spi.port, 0, SPI_CLK_PHASE );
spi_set_bits_per_transfer( wifi_spi.port, 0, SPI_CSR_BITS_8_BIT );
spi_set_baudrate_div( wifi_spi.port, 0, (sysclk_get_cpu_hz() / SPI_BAUD_RATE) );
spi_set_transfer_delay( wifi_spi.port, 0, 0, 0 );
/* Must be lower priority than the value of configMAX_SYSCALL_INTERRUPT_PRIORITY */
/* otherwise FreeRTOS will not be able to mask the interrupt */
/* keep in mind that ARMCM4 interrupt priority logic is inverted, the highest value */
/* is the lowest priority */
/* Configure SPI interrupts . */
NVIC_EnableIRQ( platform_flexcom_irq_numbers[wifi_spi.spi_id] );
spi_enable(wifi_spi.port);
platform_mcu_powersave_enable( );
return kNoErr;
}
OSStatus platform_spi_transfer( platform_spi_driver_t* driver, const platform_spi_config_t* config, const platform_spi_message_segment_t* segments, uint16_t number_of_segments )
{
OSStatus err = kNoErr;
uint32_t count = 0;
uint16_t i;
platform_mcu_powersave_disable();
require_action_quiet( ( driver != NULL ) && ( config != NULL ) && ( segments != NULL ) && ( number_of_segments != 0 ), exit, err = kParamErr);
/* Activate chip select */
platform_gpio_output_low( config->chip_select );
for ( i = 0; i < number_of_segments; i++ )
{
/* Check if we are using DMA */
if ( config->mode & SPI_USE_DMA )
{
if( segments[ i ].length != 0){
//platform_log( "length: %d, i:%d", segments[ i ].length, i );
spi_dma_config( driver->peripheral, &segments[ i ] );
err = spi_dma_transfer( driver->peripheral, config );
require_noerr(err, cleanup_transfer);
}
}
else
{
count = segments[i].length;
/* in interrupt-less mode */
if ( config->bits == 8 )
{
const uint8_t* send_ptr = ( const uint8_t* )segments[i].tx_buffer;
uint8_t* rcv_ptr = ( uint8_t* )segments[i].rx_buffer;
while ( count-- )
{
uint16_t data = 0xFF;
if ( send_ptr != NULL )
{
data = *send_ptr++;
}
data = spi_transfer( driver->peripheral, data );
if ( rcv_ptr != NULL )
{
*rcv_ptr++ = (uint8_t)data;
}
}
}
else if ( config->bits == 16 )
{
const uint16_t* send_ptr = (const uint16_t *) segments[i].tx_buffer;
uint16_t* rcv_ptr = (uint16_t *) segments[i].rx_buffer;
/* Check that the message length is a multiple of 2 */
require_action_quiet( ( count % 2 ) == 0, cleanup_transfer, err = kSizeErr);
/* Transmit/receive data stream, 16-bit at time */
while ( count != 0 )
{
uint16_t data = 0xFFFF;
if ( send_ptr != NULL )
{
data = *send_ptr++;
}
data = spi_transfer( driver->peripheral, data );
if ( rcv_ptr != NULL )
{
*rcv_ptr++ = data;
}
count -= 2;
}
}
}
}
cleanup_transfer:
/* Deassert chip select */
platform_gpio_output_high( config->chip_select );
exit:
platform_mcu_powersave_enable( );
return err;
}
OSStatus host_platform_bus_init( void )
{
SPI_InitTypeDef spi_init;
DMA_InitTypeDef dma_init_structure;
uint32_t a;
platform_mcu_powersave_disable();
mico_rtos_init_semaphore(&spi_transfer_finished_semaphore, 1);
/* Enable SPI_SLAVE DMA clock */
if ( wifi_spi.tx_dma.controller == DMA1 )
{
RCC->AHB1ENR |= RCC_AHB1Periph_DMA1;
}
else
{
RCC->AHB1ENR |= RCC_AHB1Periph_DMA2;
}
if ( wifi_spi.rx_dma.controller == DMA1 )
{
RCC->AHB1ENR |= RCC_AHB1Periph_DMA1;
}
else
{
RCC->AHB1ENR |= RCC_AHB1Periph_DMA2;
}
/* Enable SPI_SLAVE Periph clock */
(wifi_spi.peripheral_clock_func)( wifi_spi.peripheral_clock_reg, ENABLE );
/* Enable SYSCFG. Needed for selecting EXTI interrupt line */
RCC_APB2PeriphClockCmd( RCC_APB2Periph_SYSCFG, ENABLE );
/* Setup the interrupt input for WLAN_IRQ */
platform_gpio_init( &wifi_spi_pins[WIFI_PIN_SPI_IRQ], INPUT_HIGH_IMPEDANCE );
platform_gpio_irq_enable( &wifi_spi_pins[WIFI_PIN_SPI_IRQ], IRQ_TRIGGER_RISING_EDGE, spi_irq_handler, 0 );
/* Setup SPI slave select GPIOs */
platform_gpio_init( &wifi_spi_pins[WIFI_PIN_SPI_CS], OUTPUT_PUSH_PULL );
platform_gpio_output_high( &wifi_spi_pins[WIFI_PIN_SPI_CS] );
/* Setup the SPI lines */
for ( a = WIFI_PIN_SPI_CLK; a < WIFI_PIN_SPI_MAX; a++ )
{
platform_gpio_set_alternate_function( wifi_spi_pins[ a ].port, wifi_spi_pins[ a ].pin_number, GPIO_OType_PP, GPIO_PuPd_NOPULL, wifi_spi.gpio_af );
}
#if defined ( MICO_WIFI_USE_GPIO_FOR_BOOTSTRAP )
/* Set GPIO_B[1:0] to 01 to put WLAN module into gSPI mode */
platform_gpio_init( &wifi_control_pins[WIFI_PIN_BOOTSTRAP_0], OUTPUT_PUSH_PULL );
platform_gpio_output_high( &wifi_control_pins[WIFI_PIN_BOOTSTRAP_0] );
platform_gpio_init( &wifi_control_pins[WIFI_PIN_BOOTSTRAP_1], OUTPUT_PUSH_PULL );
platform_gpio_output_low( &wifi_control_pins[WIFI_PIN_BOOTSTRAP_1] );
#endif
/* Setup DMA for SPIX RX */
DMA_DeInit( wifi_spi.rx_dma.stream );
dma_init_structure.DMA_Channel = wifi_spi.rx_dma.channel;
dma_init_structure.DMA_PeripheralBaseAddr = (uint32_t) &(wifi_spi.port->DR);
dma_init_structure.DMA_Memory0BaseAddr = 0;
dma_init_structure.DMA_DIR = DMA_DIR_PeripheralToMemory;
dma_init_structure.DMA_BufferSize = 0;
dma_init_structure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
dma_init_structure.DMA_MemoryInc = DMA_MemoryInc_Enable;
dma_init_structure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
dma_init_structure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
dma_init_structure.DMA_Mode = DMA_Mode_Normal;
dma_init_structure.DMA_Priority = DMA_Priority_VeryHigh;
dma_init_structure.DMA_FIFOMode = DMA_FIFOMode_Disable;
dma_init_structure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
dma_init_structure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
dma_init_structure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init( wifi_spi.rx_dma.stream, &dma_init_structure );
/* Setup DMA for SPIX TX */
DMA_DeInit( wifi_spi.tx_dma.stream );
dma_init_structure.DMA_Channel = wifi_spi.tx_dma.channel;
dma_init_structure.DMA_PeripheralBaseAddr = (uint32_t) &(wifi_spi.port->DR);
dma_init_structure.DMA_Memory0BaseAddr = 0;
dma_init_structure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
dma_init_structure.DMA_BufferSize = 0;
dma_init_structure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
dma_init_structure.DMA_MemoryInc = DMA_MemoryInc_Enable;
dma_init_structure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
dma_init_structure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
dma_init_structure.DMA_Mode = DMA_Mode_Normal;
dma_init_structure.DMA_Priority = DMA_Priority_VeryHigh;
dma_init_structure.DMA_FIFOMode = DMA_FIFOMode_Disable;
dma_init_structure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
dma_init_structure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
dma_init_structure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init( wifi_spi.tx_dma.stream, &dma_init_structure );
/* Must be lower priority than the value of configMAX_SYSCALL_INTERRUPT_PRIORITY */
/* otherwise FreeRTOS will not be able to mask the interrupt */
/* keep in mind that ARMCM3 interrupt priority logic is inverted, the highest value */
/* is the lowest priority */
NVIC_EnableIRQ( wifi_spi.rx_dma.irq_vector );
/* Enable DMA for TX */
SPI_I2S_DMACmd( wifi_spi.port, SPI_I2S_DMAReq_Tx | SPI_I2S_DMAReq_Rx, ENABLE );
/* Setup SPI */
spi_init.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
spi_init.SPI_Mode = SPI_Mode_Master;
spi_init.SPI_DataSize = SPI_DataSize_8b;
spi_init.SPI_CPOL = SPI_CPOL_High;
spi_init.SPI_CPHA = SPI_CPHA_2Edge;
spi_init.SPI_NSS = SPI_NSS_Soft;
spi_init.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
spi_init.SPI_FirstBit = SPI_FirstBit_MSB;
spi_init.SPI_CRCPolynomial = (uint16_t) 7;
/* Init SPI and enable it */
SPI_Init( wifi_spi.port, &spi_init );
SPI_Cmd( wifi_spi.port, ENABLE );
platform_mcu_powersave_enable();
return kNoErr;
}
wiced_result_t bluetooth_wiced_init_platform( void )
{
if ( wiced_bt_control_pins[ WICED_BT_PIN_HOST_WAKE ] != NULL )
{
RETURN_IF_FAILURE( platform_gpio_init( wiced_bt_control_pins[WICED_BT_PIN_HOST_WAKE], INPUT_HIGH_IMPEDANCE ) );
}
if ( wiced_bt_control_pins[ WICED_BT_PIN_DEVICE_WAKE ] != NULL )
{
RETURN_IF_FAILURE( platform_gpio_init( wiced_bt_control_pins[ WICED_BT_PIN_DEVICE_WAKE ], OUTPUT_PUSH_PULL ) );
RETURN_IF_FAILURE( platform_gpio_output_low( wiced_bt_control_pins[ WICED_BT_PIN_DEVICE_WAKE ] ) );
wiced_rtos_delay_milliseconds( 100 );
}
/* Configure Reg Enable pin to output. Set to HIGH */
if ( wiced_bt_control_pins[ WICED_BT_PIN_POWER ] != NULL )
{
RETURN_IF_FAILURE( platform_gpio_init( wiced_bt_control_pins[ WICED_BT_PIN_POWER ], OUTPUT_OPEN_DRAIN_PULL_UP ) );
RETURN_IF_FAILURE( platform_gpio_output_high( wiced_bt_control_pins[ WICED_BT_PIN_POWER ] ) );
}
if ( wiced_bt_uart_config.flow_control == FLOW_CONTROL_DISABLED )
{
/* Configure RTS pin to output. Set to HIGH */
RETURN_IF_FAILURE( platform_gpio_init( wiced_bt_uart_pins[WICED_BT_PIN_UART_RTS], OUTPUT_OPEN_DRAIN_PULL_UP ) );
RETURN_IF_FAILURE( platform_gpio_output_high( wiced_bt_uart_pins[WICED_BT_PIN_UART_RTS] ) );
/* Configure CTS pin to input pull-up */
RETURN_IF_FAILURE( platform_gpio_init( wiced_bt_uart_pins[WICED_BT_PIN_UART_CTS], INPUT_PULL_UP ) );
}
if ( wiced_bt_control_pins[ WICED_BT_PIN_RESET ] != NULL )
{
RETURN_IF_FAILURE( platform_gpio_init( wiced_bt_control_pins[ WICED_BT_PIN_RESET ], OUTPUT_PUSH_PULL ) );
RETURN_IF_FAILURE( platform_gpio_output_high( wiced_bt_control_pins[ WICED_BT_PIN_RESET ] ) );
/* Configure USART comms */
RETURN_IF_FAILURE( bluetooth_wiced_init_config_uart( &wiced_bt_uart_config ) );
/* Reset bluetooth chip */
RETURN_IF_FAILURE( platform_gpio_output_low( wiced_bt_control_pins[ WICED_BT_PIN_RESET ] ) );
wiced_rtos_delay_milliseconds( 10 );
RETURN_IF_FAILURE( platform_gpio_output_high( wiced_bt_control_pins[ WICED_BT_PIN_RESET ] ) );
}
else
{
/* Configure USART comms */
RETURN_IF_FAILURE( bluetooth_wiced_init_config_uart( &wiced_bt_uart_config ) );
}
wiced_rtos_delay_milliseconds( BLUETOOTH_CHIP_STABILIZATION_DELAY );
if ( wiced_bt_uart_config.flow_control == FLOW_CONTROL_DISABLED )
{
/* Bluetooth chip is ready. Pull host's RTS low */
RETURN_IF_FAILURE( platform_gpio_output_low( wiced_bt_uart_pins[WICED_BT_PIN_UART_RTS] ) );
}
/* Wait for Bluetooth chip to pull its RTS (host's CTS) low. From observation using CRO, it takes the bluetooth chip > 170ms to pull its RTS low after CTS low */
while ( platform_gpio_input_get( wiced_bt_uart_pins[ WICED_BT_PIN_UART_CTS ] ) == WICED_TRUE )
{
wiced_rtos_delay_milliseconds( 10 );
}
return WICED_SUCCESS;
}
OSStatus host_platform_bus_init( void )
{
SDIO_InitTypeDef sdio_init_structure;
OSStatus result;
uint8_t a;
platform_mcu_powersave_disable();
result = mico_rtos_init_semaphore( &sdio_transfer_finished_semaphore, 1 );
if ( result != kNoErr )
{
return result;
}
/* Turn on SDIO IRQ */
SDIO->ICR = (uint32_t) 0xffffffff;
/* Must be lower priority than the value of configMAX_SYSCALL_INTERRUPT_PRIORITY */
/* otherwise FreeRTOS will not be able to mask the interrupt */
/* keep in mind that ARMCM3 interrupt priority logic is inverted, the highest value */
/* is the lowest priority */
NVIC_EnableIRQ( SDIO_IRQ_CHANNEL );
NVIC_EnableIRQ( DMA2_3_IRQ_CHANNEL );
/* Set GPIO_B[1:0] to 00 to put WLAN module into SDIO mode */
#if defined ( MICO_WIFI_USE_GPIO_FOR_BOOTSTRAP )
platform_gpio_init( &wifi_control_pins[WIFI_PIN_BOOTSTRAP_0], OUTPUT_PUSH_PULL );
platform_gpio_output_low( &wifi_control_pins[WIFI_PIN_BOOTSTRAP_0] );
platform_gpio_init( &wifi_control_pins[WIFI_PIN_BOOTSTRAP_1], OUTPUT_PUSH_PULL );
platform_gpio_output_low( &wifi_control_pins[WIFI_PIN_BOOTSTRAP_1] );
#endif
/* Setup GPIO pins for SDIO data & clock */
for ( a = WIFI_PIN_SDIO_CLK; a < WIFI_PIN_SDIO_MAX; a++ )
{
platform_gpio_set_alternate_function( wifi_sdio_pins[ a ].port, wifi_sdio_pins[ a ].pin_number, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_SDIO );
}
#ifdef SDIO_1_BIT
platform_gpio_init( &wifi_sdio_pins[WIFI_PIN_SDIO_IRQ], INPUT_PULL_UP );
platform_gpio_irq_enable( &wifi_sdio_pins[WIFI_PIN_SDIO_IRQ], IRQ_TRIGGER_FALLING_EDGE, sdio_int_pin_irq_handler, 0 );
#endif
/*!< Enable the SDIO AHB Clock and the DMA2 Clock */
RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_DMA2, ENABLE );
RCC_APB2PeriphClockCmd( RCC_APB2Periph_SDIO, ENABLE );
SDIO_DeInit( );
sdio_init_structure.SDIO_ClockDiv = (uint8_t) 120; /* 0x78, clock is taken from the high speed APB bus ; */ /* About 400KHz */
sdio_init_structure.SDIO_ClockEdge = SDIO_ClockEdge_Rising;
sdio_init_structure.SDIO_ClockBypass = SDIO_ClockBypass_Disable;
sdio_init_structure.SDIO_ClockPowerSave = SDIO_ClockPowerSave_Enable;
sdio_init_structure.SDIO_BusWide = SDIO_BusWide_1b;
sdio_init_structure.SDIO_HardwareFlowControl = SDIO_HardwareFlowControl_Disable;
SDIO_Init( &sdio_init_structure );
SDIO_SetPowerState( SDIO_PowerState_ON );
SDIO_SetSDIOReadWaitMode( SDIO_ReadWaitMode_CLK );
SDIO_ClockCmd( ENABLE );
platform_mcu_powersave_enable();
return kNoErr;
}
OSStatus MicoGpioOutputLow( mico_gpio_t gpio )
{
if ( gpio >= MICO_GPIO_NONE )
return kUnsupportedErr;
return (OSStatus) platform_gpio_output_low( &platform_gpio_pins[gpio] );
}
platform_result_t platform_spi_transfer( const platform_spi_t* spi, const platform_spi_config_t* config, const platform_spi_message_segment_t* segments, uint16_t number_of_segments )
{
platform_result_t result = PLATFORM_SUCCESS;
uint32_t count = 0;
uint16_t i;
wiced_assert( "bad argument", ( spi != NULL ) && ( config != NULL ) && ( segments != NULL ) && ( number_of_segments != 0 ) );
platform_mcu_powersave_disable();
/* Activate chip select */
platform_gpio_output_low( config->chip_select );
for ( i = 0; i < number_of_segments; i++ )
{
/* Check if we are using DMA */
if ( config->mode & SPI_USE_DMA )
{
spi_dma_config( spi, &segments[ i ] );
result = spi_dma_transfer( spi, config );
if ( result != PLATFORM_SUCCESS )
{
goto cleanup_transfer;
}
}
else
{
count = segments[i].length;
/* in interrupt-less mode */
if ( config->bits == 8 )
{
const uint8_t* send_ptr = ( const uint8_t* )segments[i].tx_buffer;
uint8_t* rcv_ptr = ( uint8_t* )segments[i].rx_buffer;
while ( count-- )
{
uint16_t data = 0xFF;
if ( send_ptr != NULL )
{
data = *send_ptr++;
}
data = spi_transfer( spi, data );
if ( rcv_ptr != NULL )
{
*rcv_ptr++ = (uint8_t)data;
}
}
}
else if ( config->bits == 16 )
{
const uint16_t* send_ptr = (const uint16_t *) segments[i].tx_buffer;
uint16_t* rcv_ptr = (uint16_t *) segments[i].rx_buffer;
/* Check that the message length is a multiple of 2 */
if ( ( count % 2 ) != 0 )
{
result = WICED_ERROR;
goto cleanup_transfer;
}
/* Transmit/receive data stream, 16-bit at time */
while ( count != 0 )
{
uint16_t data = 0xFFFF;
if ( send_ptr != NULL )
{
data = *send_ptr++;
}
data = spi_transfer( spi, data );
if ( rcv_ptr != NULL )
{
*rcv_ptr++ = data;
}
count -= 2;
}
}
}
}
cleanup_transfer:
/* Deassert chip select */
platform_gpio_output_high( config->chip_select );
platform_mcu_powersave_enable( );
return result;
}