/**
* \brief Configure USART in synchronous mode.
*
* \param ul_ismaster 1 for master, 0 for slave.
* \param ul_baudrate Baudrate for synchronous communication.
*
*/
static void configure_usart(uint32_t ul_ismaster, uint32_t ul_baudrate)
{
sam_usart_opt_t usart_console_settings = {
0,
US_MR_CHRL_8_BIT,
US_MR_PAR_NO,
US_MR_NBSTOP_1_BIT,
US_MR_CHMODE_NORMAL,
/* This field is only used in IrDA mode. */
0
};
usart_console_settings.baudrate = ul_baudrate;
/* Enable the peripheral clock in the PMC. */
sysclk_enable_peripheral_clock(BOARD_ID_USART);
/* Configure USART in SYNC. master or slave mode. */
if (ul_ismaster) {
usart_init_sync_master(BOARD_USART, &usart_console_settings, sysclk_get_peripheral_hz());
} else {
usart_init_sync_slave(BOARD_USART, &usart_console_settings);
}
/* Disable all the interrupts. */
usart_disable_interrupt(BOARD_USART, ALL_INTERRUPT_MASK);
/* Enable TX & RX function. */
usart_enable_tx(BOARD_USART);
usart_enable_rx(BOARD_USART);
/* Configure and enable interrupt of USART. */
NVIC_EnableIRQ(USART_IRQn);
}
/** Enables the target's PDI interface, holding the target in reset until PDI mode is exited. */
void XPROGTarget_EnableTargetPDI(void)
{
IsSending = false;
/* Turn on clock */
sysclk_enable_peripheral_clock(USART_PDI_ID);
/* Set Tx and XCK as outputs, Rx as input */
gpio_configure_pin(PIN_PDIDTX_GPIO, PIN_PDIDTX_OUT_FLAGS);
gpio_configure_pin(PIN_PDIDRX_GPIO, PIN_PDIDRX_FLAGS);
gpio_configure_pin(PIN_PDIC_GPIO, PIN_PDIC_OUT_FLAGS);
delay_us(50);
/* Set DATA line high for at least 90ns to disable /RESET functionality */
gpio_set_pin_high(PIN_PDIDTX_GPIO);
delay_us(10);
/* Set up the synchronous USART for XMEGA communications - 8 data bits, even parity, 2 stop bits */
const sam_usart_opt_t usart_pdid_settings = {
PDI_BAUD_RATE,
US_MR_CHRL_8_BIT,
US_MR_PAR_EVEN,
US_MR_NBSTOP_2_BIT,
US_MR_CHMODE_NORMAL
};
usart_init_sync_master(USART_PDI, &usart_pdid_settings, sysclk_get_main_hz());
/* Turn on clock */
gpio_configure_pin(PIN_PDIC_GPIO, PIN_PDIC_USART_FLAGS);
/* Send two IDLEs of 12 bits each to enable PDI interface (need at least 16 idle bits) */
XPROGTarget_SendIdle();
XPROGTarget_SendIdle();
}
void ledstripe_on(uint16_t num_leds, uint8_t* in_ledstripe_buffer) {
ledstripe_buffer = in_ledstripe_buffer;
ledstripe_buffer_len = LEDSTRIPE_BUFFER_CAPACITY(num_leds);
ledstripe_idx = ledstripe_buffer_len;
usart_configure_pin(USART0_TXD_GROUP, USART0_TXD_IDX, USART0_TXD_MODE, false, true);
usart_configure_pin(USART0_RXD_GROUP, USART0_RXD_IDX, USART0_RXD_MODE, true, true);
usart_configure_pin(USART0_UCLK_GROUP, USART0_UCLK_IDX, USART0_UCLK_MODE, false, true);
write_pin(PORT_5V_EN_PIN, true);
usart_init_sync_master(LEDSTRIPE_USART_IDX, 8, 3200000, 16, USART_FCR_RXTRIGLVL_8, NULL, NULL/*ledstripe_refill*/, NULL);
}
