From 563f471ae625bed63ebd23b309504d5e896a258c Mon Sep 17 00:00:00 2001
From: Erik Strand <erik.strand@cba.mit.edu>
Date: Sun, 12 May 2019 15:04:49 -0400
Subject: [PATCH] Verify that card detect pin is working
---
sd_tests/neil/read_sd.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/sd_tests/neil/read_sd.c b/sd_tests/neil/read_sd.c
index 0f707a4..65e67f6 100644
--- a/sd_tests/neil/read_sd.c
+++ b/sd_tests/neil/read_sd.c
@@ -54,6 +54,14 @@
#define MISO_pin (1 << PA5)
#define MISO_pins PINA
+#define DETECT_port PORTA
+#define DETECT_direction DDRA
+#define DETECT_pin (1 << PA7)
+
+#define led_port PORTB
+#define led_direction DDRB
+#define led_pin (1 << PB2)
+
//
// put_char
// send character in txchar
@@ -299,6 +307,19 @@ int main(void) {
//
// main
//
+
+ // Debug loop to verify we can detect when the card is inserted
+ // Configure DETECT_pin as an input and led_pin as an output
+ DETECT_direction &= ~DETECT_pin;
+ led_direction |= led_pin;
+ while (1) {
+ if (PINA & DETECT_pin) {
+ led_port &= ~led_pin;
+ } else {
+ led_port |= led_pin;
+ }
+ }
+
static uint8_t count,sectors_per_cluster,FATs,attribute,result[8],buffer[50];
static uint16_t bytes_per_sector,reserved_sectors,offset,
file_cluster_low,file_cluster_hi,buffer_length,sector_count;
--
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