1 files changed, 59 insertions, 0 deletions
diff --git a/lib/msp430/usci_isr_handler.c b/lib/msp430/usci_isr_handler.c
new file mode 100644
index 0000000..a112ce7
--- /dev/null
+++ b/lib/msp430/usci_isr_handler.c
@@ -0,0 +1,59 @@
+#include "Energia.h"
+#if defined(__MSP430_HAS_USCI__) || defined(__MSP430_HAS_EUSCI_A0__)
+#include "usci_isr_handler.h"
+
+/* This dummy function ensures that, when called from any module that 
+ * is interested in having the USCIAB0TX_VECTOR and USCIAB0TX_VECTOR
+ * installed, the linker won't strip the vectors.*/
+void usci_isr_install(){}
+
+
+
+#if defined(__MSP430_HAS_EUSCI_A0__)
+__attribute__((interrupt(USCI_A0_VECTOR)))
+void USCIA0_ISR(void)
+{
+  switch ( UCA0IV ) 
+  { 
+    case USCI_UART_UCRXIFG: uart_rx_isr(); break;
+    case USCI_UART_UCTXIFG: uart_tx_isr(); break;
+  }  
+}
+
+#else // #if defined(__MSP430_HAS_EUSCI_A0__)
+/* USCI_Ax and USCI_Bx share the same TX interrupt vector.
+ * UART: 
+ *	USCIAB0TX_VECTOR services the UCA0TXIFG set in UC0IFG.
+ *	USCIAB0RX_VECTOR services the UCA0RXIFG set in UC0IFG.
+ * I2C: 
+ *	USCIAB0TX_VECTOR services both UCB0TXIFG and UCB0RXIFG
+ *	set in UC0IFG.
+ *	USCIAB0RX_VECTOR services the state change interrupts
+ *	UCSTTIFG, UCSTPIFG, UCIFG, UCALIFG set in UCB0STAT.*/
+
+__attribute__((interrupt(USCIAB0TX_VECTOR))) 
+void USCIAB0TX_ISR(void)
+{
+	/* USCI_A0 UART interrupt? */
+	if (UC0IFG & UCA0TXIFG)
+		uart_tx_isr();
+
+	/* USCI_B0 I2C TX RX interrupt. */
+	if ((UC0IFG & (UCB0TXIFG | UCB0RXIFG)) != 0)
+		i2c_txrx_isr();
+
+}
+
+__attribute__((interrupt(USCIAB0RX_VECTOR)))
+void USCIAB0RX_ISR(void)
+{
+	/* USCI_A0 UART interrupt? */
+	if (UC0IFG & UCA0RXIFG)
+		uart_rx_isr();
+
+	/* USCI_B0 I2C state change interrupt. */
+	if ((UCB0STAT & (UCALIFG | UCNACKIFG | UCSTTIFG | UCSTPIFG)) != 0)
+		i2c_state_isr(); 
+}
+#endif // #if defined(__MSP430_HAS_EUSCI_A0__)
+#endif // if defined(__MSP430_HAS_USCI__) || defined(__MSP430_HAS_EUSCI_A0__)