From 4a76fac591d649d1a32c7983885c6126a8881f5f Mon Sep 17 00:00:00 2001
From: Derisis13 <email.felhasznalasra@gmail.com>
Date: Mon, 12 Dec 2022 17:20:24 +0100
Subject: [PATCH] feature: implemented i2c dumping todo: spi, d28, d32 read &
 write, i2c write todo: invalid state handling

---
 Core/Inc/main.h | 10 ++++++++++
 Core/Src/main.c | 28 ++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/Core/Inc/main.h b/Core/Inc/main.h
index 054e629..fdf2aeb 100644
--- a/Core/Inc/main.h
+++ b/Core/Inc/main.h
@@ -60,6 +60,16 @@ void Error_Handler(void);
 
 /* USER CODE BEGIN EFP */
 
+void i2c_dump(uint16_t dev_address, uint16_t capacity);
+void spi_dump(uint16_t capacity);
+void d28_dump(uint16_t capacity);
+void d32_dump(uint16_t capacity);
+
+void i2c_write(uint16_t dev_address, uint16_t capacity);
+void spi_write(uint16_t capacity);
+void d28_write(uint16_t capacity);
+void d32_write(uint16_t capacity);
+
 /* USER CODE END EFP */
 
 /* Private defines -----------------------------------------------------------*/
diff --git a/Core/Src/main.c b/Core/Src/main.c
index e858b9d..4371368 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -65,6 +65,33 @@ extern uint8_t CDC_Transmit_FS(uint8_t *Buf, uint16_t Len);
 /* Private user code ---------------------------------------------------------*/
 /* USER CODE BEGIN 0 */
 
+/* -----------------------------------------------------------------------------
+ * convert a hex to ascii string
+ * input is a byte array (binary), output is a character array (str)
+ * len is the number of bytes to convert, str needs to be at least 2x as big
+ * -------------------------------------------------------------------------- */
+void hex_to_ascii (const uint8_t *binary, char *str, uint16_t len) {
+  for (uint16_t i = 0; i < len; ++i) {
+    uint8_t low = binary [i] & 0x0f;
+    uint8_t high = binary [i] >> 4;
+    str [2 * i] = (low > 0x9) ? low + '0' : low - 0xA + 'A';
+    str [2 * i + 1] = (high > 0x9) ? high + '0' : high - 0xA + 'A';
+  }
+}
+
+void i2c_dump(uint16_t dev_address, uint16_t capacity) {
+  const uint16_t bsize = 512;
+  char tx_buff [bsize * 2];
+  uint8_t read_buff [bsize];
+  for (uint16_t i = 0; i < capacity; i += bsize) {
+    HAL_I2C_Mem_Read(&hi2c1, dev_address, i, capacity, read_buff, bsize, 1000);
+    hex_to_ascii(read_buff, tx_buff, bsize);
+    CDC_Transmit_FS((uint8_t *) tx_buff, bsize * 2);
+  }
+}
+
+// todo spi, d28, d32 read & write, i2c write
+
 /* USER CODE END 0 */
 
 /**
@@ -110,6 +137,7 @@ int main(void)
 
     switch (st) {
       case read_i2c:
+        i2c_dump(i2c_address, limit_address);
         st = run;
         break;
       case read_spi: