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console: use buffer and interrupts instead of busy loops for UART debug output

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This commit is contained in:
Kévin Redon
2018-06-25 15:55:33 +02:00
parent 2bac56494f
commit 67e181fb15
2 changed files with 52 additions and 13 deletions
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10
firmware/libboard/common/include/board_common.h
View File

@@ -65,10 +65,14 @@
/** UART0 */
/** Console baudrate always using 115200. */
#define CONSOLE_BAUDRATE 115200
/** Usart Hw interface used by the console (UART0). */
#define CONSOLE_USART UART0
/** Usart Hw ID used by the console (UART0). */
/** UART peripheral used by the console (UART0). */
#define CONSOLE_UART UART0
/** UART peripheral ID used by the console (UART0). */
#define CONSOLE_ID ID_UART0
/** UART ISR used by the console (UART0). */
#define CONSOLE_ISR UART0_IrqHandler
/** UART IRQ used by the console (UART0). */
#define CONSOLE_IRQ UART0_IRQn
/** Pins description corresponding to Rxd,Txd, (UART pins) */
#define CONSOLE_PINS {PINS_UART}

55
firmware/libboard/common/source/uart_console.c
View File

@@ -43,6 +43,8 @@
#include <stdio.h>
#include <stdint.h>
#include "ringbuffer.h"
/*----------------------------------------------------------------------------
* Definitions
*----------------------------------------------------------------------------*/
@@ -52,7 +54,9 @@
*----------------------------------------------------------------------------*/
/** Is Console Initialized. */
static uint8_t _ucIsConsoleInitialized=0 ;
static uint8_t _ucIsConsoleInitialized=0;
/** Ring buffer to queue data to be sent */
static ringbuf uart_tx_buffer;
/**
* \brief Configures an USART peripheral with the specified parameters.
@@ -63,7 +67,7 @@ static uint8_t _ucIsConsoleInitialized=0 ;
extern void UART_Configure( uint32_t baudrate, uint32_t masterClock)
{
const Pin pPins[] = CONSOLE_PINS;
Uart *pUart = CONSOLE_USART;
Uart *pUart = CONSOLE_UART;
/* Configure PIO */
PIO_Configure(pPins, PIO_LISTSIZE(pPins));
@@ -85,12 +89,34 @@ extern void UART_Configure( uint32_t baudrate, uint32_t masterClock)
/* Disable PDC channel */
pUart->UART_PTCR = UART_PTCR_RXTDIS | UART_PTCR_TXTDIS;
/* Reset transmit ring buffer */
rbuf_reset(&uart_tx_buffer);
/* Enable TX interrupts */
pUart->UART_IER = UART_IER_TXRDY;
NVIC_EnableIRQ(CONSOLE_IRQ);
/* Enable receiver and transmitter */
pUart->UART_CR = UART_CR_RXEN | UART_CR_TXEN;
/* Remember the configuration is complete */
_ucIsConsoleInitialized=1 ;
}
/** Interrupt Service routine to transmit queued data */
void CONSOLE_ISR(void)
{
Uart *uart = CONSOLE_UART;
if (uart->UART_SR & UART_SR_TXRDY) {
if (!rbuf_is_empty(&uart_tx_buffer)) {
//uart->UART_IER = UART_IER_TXRDY;
uart->UART_THR = rbuf_read(&uart_tx_buffer);
} else {
uart->UART_IDR = UART_IER_TXRDY;
}
}
}
/**
* \brief Outputs a character on the UART line.
*
@@ -99,19 +125,28 @@ extern void UART_Configure( uint32_t baudrate, uint32_t masterClock)
*/
extern void UART_PutChar( uint8_t c )
{
Uart *pUart=CONSOLE_USART ;
Uart *pUart = CONSOLE_UART ;
/* Initialize console is not already done */
if ( !_ucIsConsoleInitialized )
{
UART_Configure(CONSOLE_BAUDRATE, BOARD_MCK);
}
/* Wait for the transmitter to be ready */
while ( (pUart->UART_SR & UART_SR_TXEMPTY) == 0 ) ;
/* Send character */
pUart->UART_THR=c ;
/* Wait until there is space in the buffer */
while (rbuf_is_full(&uart_tx_buffer)) {
if (pUart->UART_SR & UART_SR_TXEMPTY) {
pUart->UART_IER = UART_IER_TXRDY;
CONSOLE_ISR();
}
}
/* Put character into buffer */
rbuf_write(&uart_tx_buffer, c);
if (pUart->UART_SR & UART_SR_TXEMPTY) {
pUart->UART_IER = UART_IER_TXRDY;
CONSOLE_ISR();
}
}
/**
@@ -122,7 +157,7 @@ extern void UART_PutChar( uint8_t c )
*/
extern uint32_t UART_GetChar( void )
{
Uart *pUart=CONSOLE_USART ;
Uart *pUart = CONSOLE_UART ;
if ( !_ucIsConsoleInitialized )
{
@@ -142,7 +177,7 @@ extern uint32_t UART_GetChar( void )
*/
extern uint32_t UART_IsRxReady( void )
{
Uart *pUart=CONSOLE_USART ;
Uart *pUart = CONSOLE_UART;
if ( !_ucIsConsoleInitialized )
{