From d2dc35604da5a58300558abc6f3e9bcc886652f9 Mon Sep 17 00:00:00 2001 From: Matt Mullins Date: Sun, 23 Dec 2012 09:33:52 -0800 Subject: [PATCH] DEN (Digital ENable) is required for digital I/O Even for alternate I/O pin functions. --- main.c | 1 + 1 file changed, 1 insertion(+) diff --git a/main.c b/main.c index 3588743..4cfd891 100644 --- a/main.c +++ b/main.c @@ -42,6 +42,7 @@ void main_isr() { GPIO_PORTA_AFSEL_R = 0x03; GPIO_PORTA_DR2R_R = 0x03; GPIO_PORTA_PCTL_R = 0x11; + GPIO_PORTA_DEN_R = 0x03; // Set 115200bps UART0_IBRD_R = 43; -- 2.11.0