Function uart_serial_setup

Bootloader/debug.c:94–166

// ----- Functions -----

void uart_serial_setup()
{
#if defined(_kinetis_)
	// Setup the the UART interface for keyboard data input
	SIM_SCGC4 |= SIM_SCGC4_UART; // Disable clock gating

// Kiibohd-dfu
#if defined(_kii_v2_)
	// Pin Setup for UART2
	PORTD_PCR3 = PORT_PCR_DSE | PORT_PCR_SRE | PORT_PCR_MUX(3); // TX Pin
#elif defined(_kii_v1_)
	// Pin Setup for UART0
	PORTA_PCR2 = PORT_PCR_DSE | PORT_PCR_SRE | PORT_PCR_MUX(3); // TX Pin
#endif


#if defined(_kii_v2_) // UART2 Debug
	// Setup baud rate - 115200 Baud
	// Uses Bus Clock
	// 36 MHz / ( 16 * Baud ) = BDH/L
	// Baud: 115200 -> 36 MHz / ( 16 * 115200 ) = 19.53125
	// Thus baud setting = 19
	// NOTE: If finer baud adjustment is needed see UARTx_C4 -> BRFA in the datasheet
	uint16_t baud = 19; // Max setting of 8191
	UART_BDH = (uint8_t)(baud >> 8);
	UART_BDL = (uint8_t)baud;
	UART_C4 = 0x11;

#elif defined(_kii_v1_)
	// Setup baud rate - 115200 Baud
	// 48 MHz / ( 16 * Baud ) = BDH/L
	// Baud: 115200 -> 48 MHz / ( 16 * 115200 ) = 26.0416667
	// Thus baud setting = 26
	// NOTE: If finer baud adjustment is needed see UARTx_C4 -> BRFA in the datasheet
	uint16_t baud = 26; // Max setting of 8191
	UART_BDH = (uint8_t)(baud >> 8);
	UART_BDL = (uint8_t)baud;
	UART_C4 = 0x02;

#endif

	// 8 bit, No Parity, Idle Character bit after stop
	UART_C1 = UART_C1_ILT;

	// TX FIFO Enabled, TX FIFO Size 1 (Max 8 datawords)
	// TX/RX FIFO Size:
	//  0x0 - 1 dataword
	//  0x1 - 4 dataword
	//  0x2 - 8 dataword
	UART_PFIFO = UART_PFIFO_TXFE;

	// TX Enabled, RX Enabled, RX Interrupt Enabled, Generate idles
	// UART_C2_TE UART_C2_RE UART_C2_RIE UART_C2_ILIE
	UART_C2 = UART_C2_TE | UART_C2_ILIE;

#elif defined(_sam_)
	//Select Peripheral A for UART pins
	UART_PIO->PIO_ABCDSR[0] &= ~((1 << UART_RX_PIN) | (1 << UART_TX_PIN));