From: Nathael Pajani <nathael.pajani@ed3l.fr>
Date: Sat, 15 Oct 2022 00:34:58 +0000 (+0200)
Subject: Bug fix, data corruption when SD card not present or not responding
X-Git-Url: http://git.techno-innov.fr/?a=commitdiff_plain;h=0e270dce29285d2de0fdfa57f2d060f4f8ff9dda;p=soft%2Flpc122x%2Fscialys

Bug fix, data corruption when SD card not present or not responding
---

diff --git a/v10/uSD.c b/v10/uSD.c
index 78f2bd2..fe90705 100644
--- a/v10/uSD.c
+++ b/v10/uSD.c
@@ -153,11 +153,14 @@ int scialys_uSD_append_data(struct sd_data_blob* data)
 	memcpy(mmc_data + index, data, sizeof(struct sd_data_blob));
 	index += sizeof(struct sd_data_blob);
 
-	/* Flush buffer to uSD ? */
+	/* Flush buffer to uSD ?
+	 * Do it when there's not enough room in buffer for another chunk of data. */
 	if ((index + sizeof(struct sd_data_blob)) >= MMC_BUF_SIZE) {
 		int ret = scialys_uSD_write(last_block.block_num + 1);
 		if (ret != 0) {
 			uprintf(UART0, "Write to uSD returned %d\n", ret);
+			/* Drop old data ... we do not have that much RAM available !!! */
+			index = 0;
 			return ret;
 		}
 		last_block.block_num++;