void SpiOpen(gcSpiHandleRx pfRxHandler)
{
DEBUG_printf("SpiOpen\n");
/* initialize SPI state */
sSpiInformation.ulSpiState = eSPI_STATE_POWERUP;
sSpiInformation.SPIRxHandler = pfRxHandler;
sSpiInformation.usTxPacketLength = 0;
sSpiInformation.pTxPacket = NULL;
sSpiInformation.pRxPacket = (unsigned char *)spi_buffer;
sSpiInformation.usRxPacketLength = 0;
spi_buffer[CC3000_RX_BUFFER_SIZE - 1] = CC3000_BUFFER_MAGIC_NUMBER;
wlan_tx_buffer[CC3000_TX_BUFFER_SIZE - 1] = CC3000_BUFFER_MAGIC_NUMBER;
/* SPI configuration */
SPI_HANDLE->Init.Mode = SPI_MODE_MASTER;
SPI_HANDLE->Init.Direction = SPI_DIRECTION_2LINES;
SPI_HANDLE->Init.DataSize = SPI_DATASIZE_8BIT;
SPI_HANDLE->Init.CLKPolarity = SPI_POLARITY_LOW;
SPI_HANDLE->Init.CLKPhase = SPI_PHASE_2EDGE;
SPI_HANDLE->Init.NSS = SPI_NSS_SOFT;
SPI_HANDLE->Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8;
SPI_HANDLE->Init.FirstBit = SPI_FIRSTBIT_MSB;
SPI_HANDLE->Init.TIMode = SPI_TIMODE_DISABLED;
SPI_HANDLE->Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
SPI_HANDLE->Init.CRCPolynomial = 7;
spi_init(SPI_HANDLE);
// configure wlan CS and EN pins
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.Speed = GPIO_SPEED_FAST;
GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Alternate = 0;
GPIO_InitStructure.Pin = PIN_CS->pin_mask;
HAL_GPIO_Init(PIN_CS->gpio, &GPIO_InitStructure);
GPIO_InitStructure.Pin = PIN_EN->pin_mask;
HAL_GPIO_Init(PIN_EN->gpio, &GPIO_InitStructure);
HAL_GPIO_WritePin(PIN_CS->gpio, PIN_CS->pin_mask, GPIO_PIN_SET);
HAL_GPIO_WritePin(PIN_EN->gpio, PIN_EN->pin_mask, GPIO_PIN_RESET);
/* do a dummy read, this ensures SCLK is low before
actual communications start, it might be required */
CS_LOW();
uint8_t buf[1];
HAL_SPI_Receive(SPI_HANDLE, buf, sizeof(buf), SPI_TIMEOUT);
CS_HIGH();
// register EXTI
extint_register((mp_obj_t)PIN_IRQ, GPIO_MODE_IT_FALLING, GPIO_PULLUP, (mp_obj_t)&irq_callback_obj, true, NULL);
extint_enable(PIN_IRQ->pin);
DEBUG_printf("SpiOpen finished; IRQ.pin=%d IRQ_LINE=%d\n", PIN_IRQ->pin, PIN_IRQ->pin);
}
/// \method callback(fun)
/// Register the given function to be called when the switch is pressed down.
/// If `fun` is `None`, then it disables the callback.
mp_obj_t pyb_switch_callback(mp_obj_t self_in, mp_obj_t callback) {
MP_STATE_PORT(pyb_switch_callback) = callback;
// Init the EXTI each time this function is called, since the EXTI
// may have been disabled by an exception in the interrupt, or the
// user disabling the line explicitly.
extint_register(MP_OBJ_FROM_PTR(MICROPY_HW_USRSW_PIN),
MICROPY_HW_USRSW_EXTI_MODE,
MICROPY_HW_USRSW_PULL,
callback == mp_const_none ? mp_const_none : MP_OBJ_FROM_PTR(&switch_callback_obj),
true);
return mp_const_none;
}
STATIC mp_obj_t extint_make_new(const mp_obj_type_t *type, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
// type_in == extint_obj_type
// parse args
mp_arg_val_t vals[PYB_EXTINT_MAKE_NEW_NUM_ARGS];
mp_arg_parse_all_kw_array(n_args, n_kw, args, PYB_EXTINT_MAKE_NEW_NUM_ARGS, pyb_extint_make_new_args, vals);
extint_obj_t *self = m_new_obj(extint_obj_t);
self->base.type = type;
self->line = extint_register(vals[0].u_obj, vals[1].u_int, vals[2].u_int, vals[3].u_obj, false);
return self;
}
/// \method callback(fun)
/// Register the given function to be called when the switch is pressed down.
/// If `fun` is `None`, then it disables the callback.
mp_obj_t pyb_switch_callback(mp_obj_t self_in, mp_obj_t callback) {
pyb_switch_obj_t *self = self_in;
self->callback = callback;
// Init the EXTI each time this function is called, since the EXTI
// may have been disabled by an exception in the interrupt, or the
// user disabling the line explicitly.
extint_register((mp_obj_t)&MICROPY_HW_USRSW_PIN,
MICROPY_HW_USRSW_EXTI_MODE,
MICROPY_HW_USRSW_PULL,
callback == mp_const_none ? mp_const_none : (mp_obj_t)&switch_callback_obj,
true, NULL);
return mp_const_none;
}
void pyb_cc3000_spi_init(void) {
DEBUG_printf("pyb_cc3000_spi_init\n");
/*
inf.baudRate = 100000; // FIXME - just slow for debug
inf.spiMode = SPIF_SPI_MODE_1; // Mode 1 CPOL= 0 CPHA= 1
*/
/*!< SPI configuration */
SPI_HANDLE.Init.Mode = SPI_MODE_MASTER;
SPI_HANDLE.Init.Direction = SPI_DIRECTION_2LINES;
SPI_HANDLE.Init.DataSize = SPI_DATASIZE_8BIT; // should be correct
SPI_HANDLE.Init.CLKPolarity = SPI_POLARITY_LOW; // clock is low when idle
SPI_HANDLE.Init.CLKPhase = SPI_PHASE_2EDGE; // data latched on second edge, which is falling edge for low-idle
SPI_HANDLE.Init.NSS = SPI_NSS_SOFT; // software control
SPI_HANDLE.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8; // clock freq = f_PCLK / this_prescale_value
SPI_HANDLE.Init.FirstBit = SPI_FIRSTBIT_MSB; // should be correct
SPI_HANDLE.Init.TIMode = SPI_TIMODE_DISABLED;
SPI_HANDLE.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
SPI_HANDLE.Init.CRCPolynomial = 7; // unused
spi_init(&SPI_HANDLE);
// configure wlan CS and EN pins
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.Speed = GPIO_SPEED_FAST;
GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Alternate = 0;
GPIO_InitStructure.Pin = PIN_CS.pin_mask;
HAL_GPIO_Init(PIN_CS.gpio, &GPIO_InitStructure);
GPIO_InitStructure.Pin = PIN_EN.pin_mask;
HAL_GPIO_Init(PIN_EN.gpio, &GPIO_InitStructure);
pyb_cc3000_set_cs(1); // de-assert CS
pyb_cc3000_set_en(0); // disable wlan
// configure EXTI for PIN_IRQ
extint_register((mp_obj_t)&PIN_IRQ, GPIO_MODE_IT_FALLING, GPIO_PULLUP, (mp_obj_t)&irq_callback_obj, true, NULL);
// wait a little (ensure that WLAN takes effect)
HAL_Delay(500); // force a 500ms delay! FIXME
}
