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More preparation for mk20dx256vlh7

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This commit is contained in:
Jacob Alexander 2015-01-10 19:55:28 -08:00
parent 2c7542e2e7
commit b2539041ee
5 changed files with 212 additions and 93 deletions
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17
Bootloader/main.c
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@ -1,5 +1,5 @@
/* Copyright (c) 2011,2012 Simon Schubert <2@0x2c.org>. /* Copyright (c) 2011,2012 Simon Schubert <2@0x2c.org>.
* Modifications by Jacob Alexander 2014 <haata@kiibohd.com> * Modifications by Jacob Alexander 2014-2015 <haata@kiibohd.com>
* *
* This program is free software: you can redistribute it and/or modify * This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by * it under the terms of the GNU General Public License as published by
@ -15,8 +15,9 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>. * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/ */
// ----- Local Includes ----- // ----- Includes -----
// Local Includes
#include "mchck.h" #include "mchck.h"
#include "dfu.desc.h" #include "dfu.desc.h"
@ -79,12 +80,24 @@ void init_usb_bootloader( int config )
void main() void main()
{ {
#if defined(_mk20dx128vlf5_) // Kiibohd-dfu / Infinity
// XXX McHCK uses B16 instead of A19
// Enabling LED to indicate we are in the bootloader // Enabling LED to indicate we are in the bootloader
GPIOA_PDDR |= (1<<19); GPIOA_PDDR |= (1<<19);
// Setup pin - A19 - See Lib/pin_map.mchck for more details on pins // Setup pin - A19 - See Lib/pin_map.mchck for more details on pins
PORTA_PCR19 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1); PORTA_PCR19 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
GPIOA_PSOR |= (1<<19); GPIOA_PSOR |= (1<<19);
#elif defined(_mk20dx256vlh7_) // Kiibohd-dfu
// Enabling LED to indicate we are in the bootloader
GPIOA_PDDR |= (1<<5);
// Setup pin - A5 - See Lib/pin_map.mchck for more details on pins
PORTA_PCR19 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
GPIOA_PSOR |= (1<<5);
#endif
flash_prepare_flashing(); flash_prepare_flashing();
usb_init( &dfu_device ); usb_init( &dfu_device );

3
CMakeLists.txt
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@ -22,8 +22,9 @@ set( CHIP
# "at90usb646" # Teensy++ 1.0 (avr) # "at90usb646" # Teensy++ 1.0 (avr)
# "at90usb1286" # Teensy++ 2.0 (avr) # "at90usb1286" # Teensy++ 2.0 (avr)
# "mk20dx128" # Teensy 3.0 (arm) # "mk20dx128" # Teensy 3.0 (arm)
"mk20dx128vlf5" # McHCK mk20dx128vlf5 "mk20dx128vlf5" # McHCK mk20dx128vlf5
# "mk20dx256" # Teensy 3.1 (arm) # "mk20dx256" # Teensy 3.1 (arm)
# "mk20dx256vlh7" # Kiibohd-dfu mk20dx256vlh7
CACHE STRING "Microcontroller Chip" ) CACHE STRING "Microcontroller Chip" )

22
Debug/led/led.c
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@ -50,7 +50,7 @@ inline void init_errorLED()
// Setup pin - Pin 13 -> C5 - See Lib/pin_map.teensy3 for more details on pins // Setup pin - Pin 13 -> C5 - See Lib/pin_map.teensy3 for more details on pins
PORTC_PCR5 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1); PORTC_PCR5 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
// MCHCK // MCHCK / Kiibohd-dfu
#elif defined(_mk20dx128vlf5_) #elif defined(_mk20dx128vlf5_)
/* Actual MCHCK /* Actual MCHCK
@ -67,6 +67,14 @@ inline void init_errorLED()
// Setup pin - A19 - See Lib/pin_map.mchck for more details on pins // Setup pin - A19 - See Lib/pin_map.mchck for more details on pins
PORTA_PCR19 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1); PORTA_PCR19 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
// Kiibohd-dfu
#elif defined(_mk20dx256vlh7_)
// Kiibohd-dfu
// Enable pin
GPIOA_PDDR |= (1<<5);
// Setup pin - A5 - See Lib/pin_map.mchck for more details on pins
PORTA_PCR5 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
#endif #endif
} }
@ -120,6 +128,18 @@ inline void errorLED( uint8_t on )
GPIOA_PCOR |= (1<<19); GPIOA_PCOR |= (1<<19);
} }
// Kiibohd-dfu
#elif defined(_mk20dx256vlh7_)
// Kiibohd-dfu
// Error LED On (A5)
if ( on ) {
GPIOA_PSOR |= (1<<5);
}
// Error LED Off
else {
GPIOA_PCOR |= (1<<5);
}
#endif #endif
} }

81
Lib/pin_map.teensy3
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@ -1,39 +1,39 @@
// Pin Name Function Hardware // Pin Name Function Hardware
// ---------------------------------- // ----------------------------------
// 0 B16 RX1 // 0 PTB16 RX0
// 1 B17 TX1 // 1 PTB17 TX0
// 2 D0 PCS0 // 2 PTD0 PCS0
// 3 A12 FTM1_CH0 PWM (CAN TX - Teensy 3.1) I2S_TXD0 // 3 PTA12 FTM1_CH0 PWM (CAN TX - Teensy 3.1) I2S_TXD0
// 4 A13 FTM1_CH1 PWM (CAN RX - Teensy 3.1) I2S_TX_FS // 4 PTA13 FTM1_CH1 PWM (CAN RX - Teensy 3.1) I2S_TX_FS
// 5 D7 FTM0_CH7 PWM // 5 PTD7 FTM0_CH7 PWM
// 6 D4 FTM0_CH4 PWM PCS1 // 6 PTD4 FTM0_CH4 PWM PCS1
// 7 D2 RX3 SOUT0 // 7 PTD2 RX2 SOUT0
// 8 D3 TX3 SIN0 // 8 PTD3 TX2 SIN0
// 9 C3 FTM0_CH2 RX2 PWM PCS1 I2S_TX_BCLK // 9 PTC3 FTM0_CH2 RX1 PWM PCS1 I2S_TX_BCLK
// 10 C4 FTM0_CH3 TX2 PWM PCS0 // 10 PTC4 FTM0_CH3 TX1 PWM PCS0
// 11 C6 SOUT0 I2S_RX_BCLK I2S_MCLK // 11 PTC6 SOUT0 I2S_RX_BCLK I2S_MCLK
// 12 C7 SIN0 I2S_RX_FS // 12 PTC7 SIN0 I2S_RX_FS
// 13 C5 LED SCK0 I2S_RXD0 // 13 PTC5 LED SCK0 I2S_RXD0
// 14 D1 SCK0 // 14 PTD1 SCK0
// 15 C0 // 15 PTC0 PCS4 I2S_TXD1
// 16 B0 (FTM1_CH0) SCL0 // 16 PTB0 (FTM1_CH0) SCL0
// 17 B1 (FTM1_CH1) SDA0 // 17 PTB1 (FTM1_CH1) SDA0
// 18 B3 SDA0 // 18 PTB3 SDA0
// 19 B2 SCL0 // 19 PTB2 SCL0
// 20 D5 FTM0_CH5 PWM PCS2 // 20 PTD5 FTM0_CH5 PWM PCS2
// 21 D6 FTM0_CH6 PWM PCS3 // 21 PTD6 FTM0_CH6 PWM PCS3
// 22 C1 FTM0_CH0 PWM PCS3 I2S_TXD0 // 22 PTC1 FTM0_CH0 PWM PCS3 I2S_TXD0
// 23 C2 FTM0_CH1 PWM PCS2 I2S_TX_FS // 23 PTC2 FTM0_CH1 PWM PCS2 I2S_TX_FS
// 24 A5 (FTM0_CH2) I2S_TX_BCLK // 24 PTA5 (FTM0_CH2) I2S_TX_BCLK
// 25 B19 (PWM - Teensy 3.1) I2S_TX_FS // 25 PTB19 (PWM - Teensy 3.1) I2S_TX_FS
// 26 E1 // 26 PTE1 RX1 SCL1
// 27 C9 I2S_RX_BCLK // 27 PTC9 I2S_RX_BCLK
// 28 C8 I2S_MCLK // 28 PTC8 I2S_MCLK
// 29 C10 (SCL1 - Teensy 3.1) I2S_RX_FS // 29 PTC10 (SCL1 - Teensy 3.1) I2S_RX_FS
// 30 C11 (SDA1 - Teensy 3.1) I2S_RXD1 // 30 PTC11 (SDA1 - Teensy 3.1) I2S_RXD1
// 31 E0 // 31 PTE0 TX1 SDA1
// 32 B18 (PWM - Teensy 3.1) I2S_TX_BCLK // 32 PTB18 (PWM - Teensy 3.1) I2S_TX_BCLK
// 33 A4 (FTM0_CH1) // 33 PTA4 (FTM0_CH1)
// 34 analog only // 34 analog only
// 35 analog only // 35 analog only
// 36 analog only // 36 analog only
@ -43,13 +43,10 @@
// 40 DAC/A14 // 40 DAC/A14
// not available to user: // not available to user:
// A0 FTM0_CH5 SWD Clock // A0 FTM0_CH5 SWD Clock
// A1 FTM0_CH6 USB ID // A1 FTM0_CH6 USB ID
// A2 FTM0_CH7 SWD Trace // A2 FTM0_CH7 SWD Trace
// A3 FTM0_CH0 SWD Data // A3 FTM0_CH0 SWD Data
// misc
C0 PCS4 I2S_TXD1
// Analog Channel Channel // Analog Channel Channel
// Pin Pin Name ADC0 ADC1 // Pin Pin Name ADC0 ADC1

182
Output/uartOut/arm/uart_serial.c
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@ -19,18 +19,74 @@
* THE SOFTWARE. * THE SOFTWARE.
*/ */
#include "uart_serial.h" // ----- Includes -----
// Compiler Includes
#include <string.h> // For memcpy
// Project Includes
#include <Lib/OutputLib.h> #include <Lib/OutputLib.h>
#include <Lib/Interrupts.h> #include <Lib/Interrupts.h>
#include <string.h> // For memcpy
// Local Includes
#include "uart_serial.h"
// ----- Defines -----
// UART Configuration
#if defined(_mk20dx128_) || defined(_mk20dx128vlf5_) || defined(_mk20dx256_) // UART0 Debug
#define UART_BDH UART0_BDH
#define UART_BDL UART0_BDL
#define UART_C1 UART0_C1
#define UART_C2 UART0_C2
#define UART_C3 UART0_C3
#define UART_C4 UART0_C4
#define UART_CFIFO UART0_CFIFO
#define UART_D UART0_D
#define UART_PFIFO UART0_PFIFO
#define UART_RCFIFO UART0_RCFIFO
#define UART_RWFIFO UART0_RWFIFO
#define UART_S1 UART0_S1
#define UART_S2 UART0_S2
#define UART_SFIFO UART0_SFIFO
#define UART_TWFIFO UART0_TWFIFO
#define SIM_SCGC4_UART SIM_SCGC4_UART0
#define IRQ_UART_STATUS IRQ_UART0_STATUS
#elif defined(_mk20dx256vlh7_) // UART2 Debug
#define UART_BDH UART2_BDH
#define UART_BDL UART2_BDL
#define UART_C1 UART2_C1
#define UART_C2 UART2_C2
#define UART_C3 UART2_C3
#define UART_C4 UART2_C4
#define UART_CFIFO UART2_CFIFO
#define UART_D UART2_D
#define UART_PFIFO UART2_PFIFO
#define UART_RCFIFO UART2_RCFIFO
#define UART_RWFIFO UART2_RWFIFO
#define UART_S1 UART2_S1
#define UART_S2 UART2_S2
#define UART_SFIFO UART2_SFIFO
#define UART_TWFIFO UART2_TWFIFO
#define SIM_SCGC4_UART SIM_SCGC4_UART2
#define IRQ_UART_STATUS IRQ_UART2_STATUS
#endif
// ----- Variables ----- // ----- Variables -----
#define uart0_buffer_size 128 // 128 byte buffer #define uart_buffer_size 128 // 128 byte buffer
volatile uint8_t uart0_buffer_head = 0; volatile uint8_t uart_buffer_head = 0;
volatile uint8_t uart0_buffer_tail = 0; volatile uint8_t uart_buffer_tail = 0;
volatile uint8_t uart0_buffer_items = 0; volatile uint8_t uart_buffer_items = 0;
volatile uint8_t uart0_buffer[uart0_buffer_size]; volatile uint8_t uart_buffer[uart_buffer_size];
volatile uint8_t uart_configured = 0; volatile uint8_t uart_configured = 0;
@ -38,21 +94,25 @@ volatile uint8_t uart_configured = 0;
// ----- Interrupt Functions ----- // ----- Interrupt Functions -----
#if defined(_mk20dx128_) || defined(_mk20dx128vlf5_) || defined(_mk20dx256_) // UART0 Debug
void uart0_status_isr() void uart0_status_isr()
#elif defined(_mk20dx256vlh7_) // UART2 Debug
void uart2_status_isr()
#endif
{ {
cli(); // Disable Interrupts cli(); // Disable Interrupts
// UART0_S1 must be read for the interrupt to be cleared // UART0_S1 must be read for the interrupt to be cleared
if ( UART0_S1 & ( UART_S1_RDRF | UART_S1_IDLE ) ) if ( UART_S1 & ( UART_S1_RDRF | UART_S1_IDLE ) )
{ {
uint8_t available = UART0_RCFIFO; uint8_t available = UART_RCFIFO;
// If there was actually nothing // If there was actually nothing
if ( available == 0 ) if ( available == 0 )
{ {
// Cleanup // Cleanup
available = UART0_D; available = UART_D;
UART0_CFIFO = UART_CFIFO_RXFLUSH; UART_CFIFO = UART_CFIFO_RXFLUSH;
sei(); sei();
return; return;
} }
@ -60,25 +120,25 @@ void uart0_status_isr()
// Read UART0 into buffer until FIFO is empty // Read UART0 into buffer until FIFO is empty
while ( available-- > 0 ) while ( available-- > 0 )
{ {
uart0_buffer[uart0_buffer_tail++] = UART0_D; uart_buffer[uart_buffer_tail++] = UART_D;
uart0_buffer_items++; uart_buffer_items++;
// Wrap-around of tail pointer // Wrap-around of tail pointer
if ( uart0_buffer_tail >= uart0_buffer_size ) if ( uart_buffer_tail >= uart_buffer_size )
{ {
uart0_buffer_tail = 0; uart_buffer_tail = 0;
} }
// Make sure the head pointer also moves if circular buffer is overwritten // Make sure the head pointer also moves if circular buffer is overwritten
if ( uart0_buffer_head == uart0_buffer_tail ) if ( uart_buffer_head == uart_buffer_tail )
{ {
uart0_buffer_head++; uart_buffer_head++;
} }
// Wrap-around of head pointer // Wrap-around of head pointer
if ( uart0_buffer_head >= uart0_buffer_size ) if ( uart_buffer_head >= uart_buffer_size )
{ {
uart0_buffer_head = 0; uart_buffer_head = 0;
} }
} }
} }
@ -96,14 +156,20 @@ void uart_serial_setup()
uart_configured = 0; uart_configured = 0;
// Setup the the UART interface for keyboard data input // Setup the the UART interface for keyboard data input
SIM_SCGC4 |= SIM_SCGC4_UART0; // Disable clock gating SIM_SCGC4 |= SIM_SCGC4_UART; // Disable clock gating
// MCHCK // MCHCK / Kiibohd-dfu
#if defined(_mk20dx128vlf5_) #if defined(_mk20dx128vlf5_)
// Pin Setup for UART0 // Pin Setup for UART0
PORTA_PCR1 = PORT_PCR_PE | PORT_PCR_PS | PORT_PCR_PFE | PORT_PCR_MUX(2); // RX Pin PORTA_PCR1 = PORT_PCR_PE | PORT_PCR_PS | PORT_PCR_PFE | PORT_PCR_MUX(2); // RX Pin
PORTA_PCR2 = PORT_PCR_DSE | PORT_PCR_SRE | PORT_PCR_MUX(2); // TX Pin PORTA_PCR2 = PORT_PCR_DSE | PORT_PCR_SRE | PORT_PCR_MUX(2); // TX Pin
// Kiibohd-dfu
#elif defined(_mk20dx256vlh7_)
// Pin Setup for UART2
PORTD_PCR2 = PORT_PCR_PE | PORT_PCR_PS | PORT_PCR_PFE | PORT_PCR_MUX(3); // RX Pin
PORTD_PCR3 = PORT_PCR_DSE | PORT_PCR_SRE | PORT_PCR_MUX(3); // TX Pin
// Teensy // Teensy
#else #else
// Pin Setup for UART0 // Pin Setup for UART0
@ -111,44 +177,66 @@ void uart_serial_setup()
PORTB_PCR17 = PORT_PCR_DSE | PORT_PCR_SRE | PORT_PCR_MUX(3); // TX Pin PORTB_PCR17 = PORT_PCR_DSE | PORT_PCR_SRE | PORT_PCR_MUX(3); // TX Pin
#endif #endif
#if defined(_mk20dx128_) || defined(_mk20dx128vlf5_) || defined(_mk20dx256_) // UART0 Debug
// Setup baud rate - 115200 Baud // Setup baud rate - 115200 Baud
// 48 MHz / ( 16 * Baud ) = BDH/L // 48 MHz / ( 16 * Baud ) = BDH/L
// Baud: 115200 -> 48 MHz / ( 16 * 115200 ) = 26.0416667 // Baud: 115200 -> 48 MHz / ( 16 * 115200 ) = 26.0416667
// Thus baud setting = 26 // Thus baud setting = 26
// NOTE: If finer baud adjustment is needed see UARTx_C4 -> BRFA in the datasheet // NOTE: If finer baud adjustment is needed see UARTx_C4 -> BRFA in the datasheet
uint16_t baud = 26; // Max setting of 8191 uint16_t baud = 26; // Max setting of 8191
UART0_BDH = (uint8_t)(baud >> 8); UART_BDH = (uint8_t)(baud >> 8);
UART0_BDL = (uint8_t)baud; UART_BDL = (uint8_t)baud;
UART0_C4 = 0x02; UART_C4 = 0x02;
#elif defined(_mk20dx256vlh7_) // UART2 Debug
// Setup baud rate - 115200 Baud
// Uses Bus Clock
// 24 MHz / ( 16 * Baud ) = BDH/L
// Baud: 115200 -> 24 MHz / ( 16 * 115200 ) = 13.021
// Thus baud setting = 13
// NOTE: If finer baud adjustment is needed see UARTx_C4 -> BRFA in the datasheet
uint16_t baud = 13; // Max setting of 8191
UART_BDH = (uint8_t)(baud >> 8);
UART_BDL = (uint8_t)baud;
UART_C4 = 0x01;
#endif
// 8 bit, No Parity, Idle Character bit after stop // 8 bit, No Parity, Idle Character bit after stop
UART0_C1 = UART_C1_ILT; UART_C1 = UART_C1_ILT;
// Interrupt notification watermarks // Interrupt notification watermarks
UART0_TWFIFO = 2; #if defined(_mk20dx128_) || defined(_mk20dx128vlf5_) || defined(_mk20dx256_) // UART0 Debug
UART0_RWFIFO = 4; UART_TWFIFO = 2;
UART_RWFIFO = 4;
#elif defined(_mk20dx256vlh7_) // UART2 Debug
// UART2 has a single byte FIFO
UART_TWFIFO = 1;
UART_RWFIFO = 1;
#endif
// TX FIFO Disabled, TX FIFO Size 1 (Max 8 datawords), RX FIFO Enabled, RX FIFO Size 1 (Max 8 datawords) // TX FIFO Enabled, TX FIFO Size 1 (Max 8 datawords), RX FIFO Enabled, RX FIFO Size 1 (Max 8 datawords)
// TX/RX FIFO Size: // TX/RX FIFO Size:
// 0x0 - 1 dataword // 0x0 - 1 dataword
// 0x1 - 4 dataword // 0x1 - 4 dataword
// 0x2 - 8 dataword // 0x2 - 8 dataword
UART0_PFIFO = UART_PFIFO_TXFE | UART_PFIFO_RXFE; UART_PFIFO = UART_PFIFO_TXFE | UART_PFIFO_RXFE;
// Reciever Inversion Disabled, LSBF // Reciever Inversion Disabled, LSBF
// UART_S2_RXINV UART_S2_MSBF // UART_S2_RXINV UART_S2_MSBF
UART0_S2 |= 0x00; UART_S2 |= 0x00;
// Transmit Inversion Disabled // Transmit Inversion Disabled
// UART_C3_TXINV // UART_C3_TXINV
UART0_C3 |= 0x00; UART_C3 |= 0x00;
// TX Enabled, RX Enabled, RX Interrupt Enabled, Generate idles // TX Enabled, RX Enabled, RX Interrupt Enabled, Generate idles
// UART_C2_TE UART_C2_RE UART_C2_RIE UART_C2_ILIE // UART_C2_TE UART_C2_RE UART_C2_RIE UART_C2_ILIE
UART0_C2 = UART_C2_TE | UART_C2_RE | UART_C2_RIE | UART_C2_ILIE; UART_C2 = UART_C2_TE | UART_C2_RE | UART_C2_RIE | UART_C2_ILIE;
// Add interrupt to the vector table // Add interrupt to the vector table
NVIC_ENABLE_IRQ( IRQ_UART0_STATUS ); NVIC_ENABLE_IRQ( IRQ_UART_STATUS );
// UART is now ready to use // UART is now ready to use
uart_configured = 1; uart_configured = 1;
@ -164,15 +252,15 @@ int uart_serial_getchar()
unsigned int value = -1; unsigned int value = -1;
// Check to see if the FIFO has characters // Check to see if the FIFO has characters
if ( uart0_buffer_items > 0 ) if ( uart_buffer_items > 0 )
{ {
value = uart0_buffer[uart0_buffer_head++]; value = uart_buffer[uart_buffer_head++];
uart0_buffer_items--; uart_buffer_items--;
// Wrap-around of head pointer // Wrap-around of head pointer
if ( uart0_buffer_head >= uart0_buffer_size ) if ( uart_buffer_head >= uart_buffer_size )
{ {
uart0_buffer_head = 0; uart_buffer_head = 0;
} }
} }
@ -183,16 +271,16 @@ int uart_serial_getchar()
// Number of bytes available in the receive buffer // Number of bytes available in the receive buffer
int uart_serial_available() int uart_serial_available()
{ {
return uart0_buffer_items; return uart_buffer_items;
} }
// Discard any buffered input // Discard any buffered input
void uart_serial_flush_input() void uart_serial_flush_input()
{ {
uart0_buffer_head = 0; uart_buffer_head = 0;
uart0_buffer_tail = 0; uart_buffer_tail = 0;
uart0_buffer_items = 0; uart_buffer_items = 0;
} }
@ -202,8 +290,8 @@ int uart_serial_putchar( uint8_t c )
if ( !uart_configured ) if ( !uart_configured )
return -1; return -1;
while ( !( UART0_SFIFO & UART_SFIFO_TXEMPT ) ); // Wait till there is room to send while ( !( UART_SFIFO & UART_SFIFO_TXEMPT ) ); // Wait till there is room to send
UART0_D = c; UART_D = c;
return 0; return 0;
} }
@ -220,8 +308,8 @@ int uart_serial_write( const void *buffer, uint32_t size )
// While buffer is not empty and transmit buffer is // While buffer is not empty and transmit buffer is
while ( position < size ) while ( position < size )
{ {
while ( !( UART0_SFIFO & UART_SFIFO_TXEMPT ) ); // Wait till there is room to send while ( !( UART_SFIFO & UART_SFIFO_TXEMPT ) ); // Wait till there is room to send
UART0_D = data[position++]; UART_D = data[position++];
} }
return 0; return 0;
@ -231,7 +319,7 @@ int uart_serial_write( const void *buffer, uint32_t size )
void uart_serial_flush_output() void uart_serial_flush_output()
{ {
// Delay until buffer has been sent // Delay until buffer has been sent
while ( !( UART0_SFIFO & UART_SFIFO_TXEMPT ) ); // Wait till there is room to send while ( !( UART_SFIFO & UART_SFIFO_TXEMPT ) ); // Wait till there is room to send
} }