Here we are! MetaWatch support in Oswald!

[oswald.git] / metawatch / mw_uart.c

diff --git a/metawatch/mw_uart.c b/metawatch/mw_uart.c
new file mode 100644 (file)
index 0000000..16a1a29
--- /dev/null
+++ b/metawatch/mw_uart.c
@@ -0,0 +1,110 @@
+#include <msp430.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <ctype.h>
+
+#include "mw_main.h"
+
+#include "mw_uart.h"
+
+static char UART_RX_CHAR = 0;
+
+#if defined MW_DEVBOARD_V2
+
+void debug_uart_tx_char(char c);
+
+#pragma vector=USCI_A3_VECTOR
+__interrupt void UCA_ISR (void)
+{
+       /* clear IRQ flag */
+       UCA3IFG  &= ~UCRXIFG;
+       UART_RX_CHAR = UCA3RXBUF;
+       _event_src |= DBG_UART_RCV_EVENT;
+       /* wake up to handle the received char */
+       LPM3_EXIT;
+}
+
+void init_debug_uart(void)
+{
+       /* assert reset */
+       UCA3CTL1 = UCSWRST;
+
+       /* reset default SMCLK = 1.048MHz */
+       UCA3CTL1 |= UCSSEL__SMCLK;
+       /* CLK        baud   BRx  BRSx  BRFx */
+       /* 1,048,576  115200 9    1     0 */
+       /* 16,000,000 115200 138  7     0 */
+
+       UCA3BR0 = 138;
+       UCA3MCTL = UCBRS_7 + UCBRF_0;
+
+       /* set P10.4 & P10.5 to UCA function */
+       P10SEL |= BIT4;
+       P10SEL |= BIT5;
+
+       UCA3STAT = 0;
+
+       /* deassert reset */
+       UCA3CTL1 &= ~UCSWRST;
+
+       /* enable receive interrupt */
+       UCA3IE = UCRXIE;
+       /* clear interrup flags */
+       UCA3IFG = 0;
+}
+
+void debug_uart_tx_char(const char c)
+{
+       UCA3TXBUF = c;
+       while ((UCA3IFG & UCTXIFG) == 0 )
+               nop();
+}
+
+void debug_uart_tx(const char *buf)
+{
+       unsigned char i = 0;
+
+       while (buf[i] != 0) {
+               debug_uart_tx_char(buf[i]);
+               if (buf[i++] == '\n')
+                       debug_uart_tx_char('\r');
+       }
+       while (UCA3STAT & UCBUSY)
+               nop();
+}
+
+void debug_dump_hex(const uint16_t len, const void *buf)
+{
+       int i;
+       char tstr[8];
+
+       for (i=0; i<len; i++) {
+               snprintf(tstr, 8, "0x%02x ", *(uint8_t *)(buf+i));
+               debug_uart_tx(tstr);
+       }
+       debug_uart_tx("\n");
+}
+
+void debug_dump_ascii(const uint16_t len, const void *buf)
+{
+       int i;
+
+       for (i=0; i<len; i++) {
+               debug_uart_tx_char(isprint(*(uint8_t *)(buf+i)) ? *(uint8_t *)(buf+i) : '.');
+       }
+       debug_uart_tx("\n");
+}
+
+char debug_uart_rx_char(char *c)
+{
+       if (UART_RX_CHAR != 0) {
+               *c = UART_RX_CHAR;
+               UART_RX_CHAR = 0;
+               return 1;
+       } else {
+               *c = 0;
+               return 0;
+       }
+}
+#endif
+