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dm36x: uart.c allow easy switch between UART ports.

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This commit is contained in:
Kelvin Lawson
2013-09-17 15:41:45 +01:00
parent 59728345e6
commit d1ac6d8768
1 changed files with 11 additions and 8 deletions
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19
ports/arm/platforms/dm36x/uart.c
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@@ -46,6 +46,9 @@
/* Constants */
/** Select relevant UART for this platform */
#define UART_BASE DM36X_UART1_BASE
/** FR Register bits */
#define UART_FR_RXFE 0x10
#define UART_LSR_TEMT 0x40
@@ -141,23 +144,23 @@ int uart_read (char *ptr, int len)
{
#if 0
/* Wait for not-empty */
while(UART_FR(DM36X_UART0_BASE) & UART_FR_RXFE)
while(UART_FR(UART_BASE) & UART_FR_RXFE)
;
/* Read first byte */
*ptr++ = UART_DR(DM36X_UART0_BASE);
*ptr++ = UART_DR(UART_BASE);
/* Loop over remaining bytes until empty */
for (todo = 1; todo < len; todo++)
{
/* Quit if receive FIFO empty */
if(UART_FR(DM36X_UART0_BASE) & UART_FR_RXFE)
if(UART_FR(UART_BASE) & UART_FR_RXFE)
{
break;
}
/* Read next byte */
*ptr++ = UART_DR(DM36X_UART0_BASE);
*ptr++ = UART_DR(UART_BASE);
}
#endif
@@ -206,11 +209,11 @@ int uart_write (const char *ptr, int len)
for (todo = 0; todo < len; todo++)
{
/* Wait for empty */
while(UART_LSR(DM36X_UART0_BASE) & UART_LSR_TEMT)
while(UART_LSR(UART_BASE) & UART_LSR_TEMT)
;
/* Write byte to UART */
UART_DR(DM36X_UART0_BASE) = *ptr++;
UART_DR(UART_BASE) = *ptr++;
}
/* Return mutex access */
@@ -246,11 +249,11 @@ void uart_write_halt (const char *ptr)
while (*ptr != '\0')
{
/* Wait for empty */
while(UART_LSR(DM36X_UART0_BASE) & UART_LSR_TEMT)
while(UART_LSR(UART_BASE) & UART_LSR_TEMT)
;
/* Write byte to UART */
UART_DR(DM36X_UART0_BASE) = *ptr++;
UART_DR(UART_BASE) = *ptr++;
}
}