From 86e6f0db4d8349a7efbd98ac5fe5453fb58bd82c Mon Sep 17 00:00:00 2001
From: Dien-Nhung Nguyen-Phu <kein@kienlab.com>
Date: Sun, 23 Jun 2024 19:44:32 +0700
Subject: feat: save received data from BLE to flash

---
 src/data.c | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 src/data.c

(limited to 'src/data.c')

diff --git a/src/data.c b/src/data.c
new file mode 100644
index 0000000..f1a11af
--- /dev/null
+++ b/src/data.c
@@ -0,0 +1,84 @@
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "ISP583.h"
+
+#include "data.h"
+#include "leddrv.h"
+
+uint32_t bigendian16_sum(uint16_t *s, int len)
+{
+	uint32_t sum = 0;
+	while (len-- > 0) {
+		sum += bswap16(s[len]);
+	}
+	return sum;
+}
+
+uint32_t data_flatSave(uint8_t *data, uint32_t len)
+{
+	uint32_t r = EEPROM_ERASE(0, len);
+	if (r) 
+		return r;
+	return EEPROM_WRITE(0, data, len);
+}
+
+uint16_t data_flash2newmem(uint8_t **chunk, uint32_t n)
+{
+	data_legacy_t header;
+	EEPROM_READ(0, &header, LEGACY_HEADER_SIZE);
+
+	uint16_t size = bswap16(header.sizes[n]) * LED_ROWS;
+	if (size == 0)
+		return 0;
+
+	uint16_t offs = LEGACY_HEADER_SIZE
+		+ bigendian16_sum(header.sizes, n) * LED_ROWS;
+
+	*chunk = malloc(size);
+	EEPROM_READ(offs, *chunk, size);
+	return size;
+}
+
+static void __chunk2buffer(uint16_t *fb, uint8_t *chunk, int col) 
+{
+	uint16_t tmpfb[8] = {0};
+	for (int i=0; i<8; i++) {
+		for (int j=0; j<11; j++) {
+			tmpfb[i] |= ((chunk[j] >> (7-i)) & 0x01) << j;
+		}
+	}
+	for (int i=0; i<8; i++) {
+		fb[col+i] = tmpfb[i];
+	}
+}
+
+void chunk2buffer(uint8_t *chunk, uint16_t size, uint16_t *buf)
+{
+	for (int i=0; i<size/11; i++) {
+		__chunk2buffer(buf, &chunk[i*11], 8 * i);
+	}
+}
+
+void chunk2fb(uint8_t *chunk, uint16_t size, fb_t *fb)
+{
+	chunk2buffer(chunk, size, fb->buf);
+}
+
+fb_t *chunk2newfb(uint8_t *chunk, uint16_t size)
+{
+	fb_t *fb = fb_new((size*8)/11);
+	chunk2fb(chunk, size, fb);
+	return fb;
+}
+
+fb_t *flash2newfb(uint32_t n)
+{
+	uint8_t *buf;
+	uint16_t size = data_flash2newmem(&buf, n);
+	if (size == 0)
+		return NULL;
+	return chunk2newfb(buf, size);
+	free(buf);
+}
-- 
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