From 5949cef9e1f15fadca93864ddeb0fcb555b3b443 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Fri, 19 Oct 2018 11:19:40 +0200
Subject: MSP430 I2C: Enable interrupts for RX mode

---
 src/arch/msp430fr5969lp/driver/i2c.cc | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/arch/msp430fr5969lp/driver/i2c.cc b/src/arch/msp430fr5969lp/driver/i2c.cc
index 0e0c376..5a47770 100644
--- a/src/arch/msp430fr5969lp/driver/i2c.cc
+++ b/src/arch/msp430fr5969lp/driver/i2c.cc
@@ -92,7 +92,13 @@ signed char I2C::xmit(unsigned char address,
 		for (i = 0; i < rx_len; i++) {
 			if (i == rx_len - 1)
 				UCB0CTL1 |= UCTXSTP;
-			while (!(UCB0IFG & (UCRXIFG0 | UCNACKIFG | UCCLTOIFG)));
+			UCB0IFG = 0;
+			old_ifg = 0;
+			UCB0IE = UCRXIE | UCNACKIE | UCCLTOIE;
+			while (!(old_ifg & (UCRXIFG0 | UCNACKIFG | UCCLTOIFG))) {
+				arch.idle();
+			}
+			UCB0IE = 0;
 			rx_buf[i] = UCB0RXBUF;
 			UCB0IFG &= ~UCRXIFG0;
 		}
-- 
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