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Added support for CPU speed 2.4576MHz and configuration to enable/disable interrupt driven TX

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This commit is contained in:
nifi 2009-11-18 15:45:32 +00:00
parent c89028a11f
commit 4f2318152e
1 changed files with 32 additions and 2 deletions
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34
cpu/msp430/dev/uart1.c
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@ -26,7 +26,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)$Id: uart1.c,v 1.15 2009/11/18 13:24:12 nifi Exp $
* @(#)$Id: uart1.c,v 1.16 2009/11/18 15:45:32 nifi Exp $
*/
/*
@ -48,7 +48,11 @@ static uint8_t rx_in_progress;
static volatile uint8_t transmitting;
#ifdef UART1_CONF_TX_WITH_INTERRUPT
#define TX_WITH_INTERRUPT UART1_CONF_TX_WITH_INTERRUPT
#else /* UART1_CONF_TX_WITH_INTERRUPT */
#define TX_WITH_INTERRUPT 1
#endif /* UART1_CONF_TX_WITH_INTERRUPT */
#if TX_WITH_INTERRUPT
#define TXBUFSIZE 64
@ -126,18 +130,44 @@ uart1_init(unsigned long ubr)
/*
* UMCTL1 values calculated using
* http://mspgcc.sourceforge.net/baudrate.html
* Table assumes that F_CPU = 3,900,000 Hz.
*/
switch(ubr) {
#if F_CPU == 3900000ul
case UART1_BAUD2UBR(115200ul):
UMCTL1 = 0xF7;
break;
case UART1_BAUD2UBR(57600ul):
UMCTL1 = 0xED;
break;
case UART1_BAUD2UBR(38400ul):
UMCTL1 = 0xD6;
break;
case UART1_BAUD2UBR(19200ul):
UMCTL1 = 0x08;
break;
case UART1_BAUD2UBR(9600ul):
UMCTL1 = 0x22;
break;
#elif F_CPU == 2457600ul
case UART1_BAUD2UBR(115200ul):
UMCTL1 = 0x4A;
break;
case UART1_BAUD2UBR(57600ul):
UMCTL1 = 0x5B;
break;
default:
/* 9600, 19200, 38400 don't require any correction */
UMCTL1 = 0x00;
#else
#error Unsupported CPU speed in uart1.c
#endif
}
ME2 &= ~USPIE1; /* USART1 SPI module disable */