/**
* \brief Common initialiser for all buttons
* \param port_base GPIO port's register offset
* \param pin_mask Pin mask corresponding to the button's pin
*/
static void
config(uint32_t port_base, uint32_t pin_mask)
{
GPIO_SOFTWARE_CONTROL(port_base, pin_mask);
GPIO_SET_INPUT(port_base, pin_mask);
GPIO_DETECT_EDGE(port_base, pin_mask);
GPIO_TRIGGER_BOTH_EDGES(port_base, pin_mask);
GPIO_ENABLE_INTERRUPT(port_base, pin_mask);
}
/*---------------------------------------------------------------------------*/
void
felicia_spi_init(void)
{
/* Initialize ring buffers for RX and TX data */
ringbuf_init(&spi_rx_buf, rxbuf_data, sizeof(rxbuf_data));
ringbuf_init(&spi_tx_buf, txbuf_data, sizeof(txbuf_data));
/* Configre SSI interface and init TX FIFO */
ssi_reconfigure(1);
/* Set the mux correctly to connect the SSI pins to the correct GPIO pins */
/* set input pin with ioc */
REG(IOC_CLK_SSIIN_SSI0) = ioc_input_sel(SPI_CLK_PORT, SPI_CLK_PIN);
REG(IOC_SSIFSSIN_SSI0) = ioc_input_sel(SPI_SEL_PORT, SPI_SEL_PIN);
REG(IOC_SSIRXD_SSI0) = ioc_input_sel(SPI_MOSI_PORT, SPI_MOSI_PIN);
/* set output pin */
ioc_set_sel(SPI_MISO_PORT, SPI_MISO_PIN, IOC_PXX_SEL_SSI0_TXD);
/* Set pins as input and MISo as output */
GPIO_SET_INPUT(SPI_CLK_PORT_BASE, SPI_CLK_PIN_MASK);
GPIO_SET_INPUT(SPI_MOSI_PORT_BASE, SPI_MOSI_PIN_MASK);
GPIO_SET_INPUT(SPI_SEL_PORT_BASE, SPI_SEL_PIN_MASK); /* it seems that setting SEL as input is not necessary */
GPIO_SET_OUTPUT(SPI_MISO_PORT_BASE, SPI_MISO_PIN_MASK);
/* Put all the SSI gpios into peripheral mode */
GPIO_PERIPHERAL_CONTROL(SPI_CLK_PORT_BASE, SPI_CLK_PIN_MASK);
GPIO_PERIPHERAL_CONTROL(SPI_MOSI_PORT_BASE, SPI_MOSI_PIN_MASK);
GPIO_PERIPHERAL_CONTROL(SPI_MISO_PORT_BASE, SPI_MISO_PIN_MASK);
GPIO_PERIPHERAL_CONTROL(SPI_SEL_PORT_BASE, SPI_SEL_PIN_MASK); /* it seems that setting SEL: as peripheral controlled is not necessary */
/* Disable any pull ups or the like */
ioc_set_over(SPI_CLK_PORT, SPI_CLK_PIN, IOC_OVERRIDE_DIS);
ioc_set_over(SPI_MOSI_PORT, SPI_MOSI_PIN, IOC_OVERRIDE_DIS);
ioc_set_over(SPI_MISO_PORT, SPI_MISO_PIN, IOC_OVERRIDE_DIS);
ioc_set_over(SPI_SEL_PORT, SPI_SEL_PIN, IOC_OVERRIDE_PDE); /* it seems that configuring pull-ups/downs on SEL is not necessary */
/* Configure output INT pin (from Felicia to Host */
GPIO_SET_OUTPUT(SPI_INT_PORT_BASE, SPI_INT_PIN_MASK);
GPIO_CLR_PIN(SPI_INT_PORT_BASE, SPI_INT_PIN_MASK);
/* Configure CS pin and detection for both edges on that pin */
GPIO_SOFTWARE_CONTROL(SPI_CS_PORT_BASE, SPI_CS_PIN_MASK);
GPIO_SET_INPUT(SPI_CS_PORT_BASE, SPI_CS_PIN_MASK);
GPIO_DETECT_EDGE(SPI_CS_PORT_BASE, SPI_CS_PIN_MASK);
GPIO_TRIGGER_BOTH_EDGES(SPI_CS_PORT_BASE, SPI_CS_PIN_MASK);
GPIO_ENABLE_INTERRUPT(SPI_CS_PORT_BASE, SPI_CS_PIN_MASK);
ioc_set_over(SPI_CS_PORT, SPI_CS_PIN, IOC_OVERRIDE_PUE);
/* Enable interrupt form CS pin */
nvic_interrupt_enable(NVIC_INT_GPIO_PORT_B);
gpio_register_callback(cs_isr, SPI_CS_PORT, SPI_CS_PIN);
}
/**
* \brief Init function for the User button.
* \param type SENSORS_ACTIVE: Activate / Deactivate the sensor (value == 1
* or 0 respectively)
*
* \param value Depends on the value of the type argument
* \return Depends on the value of the type argument
*/
static int
config_user(int type, int value)
{
switch(type) {
case SENSORS_HW_INIT:
button_press_duration_exceeded = process_alloc_event();
/* Software controlled */
GPIO_SOFTWARE_CONTROL(BUTTON_USER_PORT_BASE, BUTTON_USER_PIN_MASK);
/* Set pin to input */
GPIO_SET_INPUT(BUTTON_USER_PORT_BASE, BUTTON_USER_PIN_MASK);
/* Enable edge detection */
GPIO_DETECT_EDGE(BUTTON_USER_PORT_BASE, BUTTON_USER_PIN_MASK);
/* Both Edges */
GPIO_TRIGGER_BOTH_EDGES(BUTTON_USER_PORT_BASE, BUTTON_USER_PIN_MASK);
ioc_set_over(BUTTON_USER_PORT, BUTTON_USER_PIN, IOC_OVERRIDE_PUE);
gpio_register_callback(btn_callback, BUTTON_USER_PORT, BUTTON_USER_PIN);
break;
case SENSORS_ACTIVE:
if(value) {
GPIO_ENABLE_INTERRUPT(BUTTON_USER_PORT_BASE, BUTTON_USER_PIN_MASK);
nvic_interrupt_enable(BUTTON_USER_VECTOR);
} else {
GPIO_DISABLE_INTERRUPT(BUTTON_USER_PORT_BASE, BUTTON_USER_PIN_MASK);
nvic_interrupt_disable(BUTTON_USER_VECTOR);
}
return value;
case BUTTON_SENSOR_CONFIG_TYPE_INTERVAL:
press_duration = (clock_time_t)value;
break;
default:
break;
}
return 1;
}
