From 379321033d00f5fc41080eeca9026b092cd328c7 Mon Sep 17 00:00:00 2001
From: Rene Hopf <renehopf@mac.com>
Date: Tue, 26 Sep 2017 00:01:38 +0200
Subject: [PATCH] flashconf

---
 shared/flashconf.c               | 67 ++++++++++++++++++++++++++++++++
 stm32f303/Makefile               |  5 ++-
 stm32f303/STM32F303CBTx_FLASH.ld |  2 +-
 3 files changed, 71 insertions(+), 3 deletions(-)
 create mode 100644 shared/flashconf.c

diff --git a/shared/flashconf.c b/shared/flashconf.c
new file mode 100644
index 00000000..491ceb48
--- /dev/null
+++ b/shared/flashconf.c
@@ -0,0 +1,67 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include "commands.h"
+#include "stm32f3xx_hal.h"
+#include "hal.h"
+
+char config[1 * 1024];
+const char *config_ro = (char *)0x0801fc00;
+
+void flashloadconf(char *ptr) {
+  strncpy(config, config_ro, sizeof(config));
+}
+COMMAND("flashloadconf", flashloadconf, "load config from flash");
+
+void flashsaveconf(char *ptr) {
+  printf("erasing flash page...\n");
+  HAL_FLASH_Unlock();
+  uint32_t PageError = 0;
+  HAL_StatusTypeDef status;
+  FLASH_EraseInitTypeDef eraseinitstruct;
+  eraseinitstruct.TypeErase = FLASH_TYPEERASE_PAGES;
+  eraseinitstruct.PageAddress = (uint32_t)config_ro;
+  eraseinitstruct.NbPages = 1;
+  status = HAL_FLASHEx_Erase(&eraseinitstruct, &PageError);
+
+  if(status != HAL_OK) {
+    printf("error!\n");
+    HAL_FLASH_Lock();
+    return;
+  }
+  printf("saving conf\n");
+  int ret = 0;
+  for(int i = 0;i<sizeof(config);i+=4){
+    uint32_t word = (config[i+0]) + (config[i+1] << 8) + (config[i+2] << 16) + (config[i+3] << 24);
+    ret = HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, (uint32_t)config_ro + i, word) != HAL_OK;
+    if(ret) {
+      printf("error writing %i\n", ret);
+      break;
+    }
+  }
+  printf("OK %i bytes written\n", sizeof(config));
+  HAL_FLASH_Lock();
+}
+COMMAND("flashsaveconf", flashsaveconf, "save config to flash");
+
+void loadconf(char *ptr) {
+  hal_parse(config);
+}
+COMMAND("loadconf", loadconf, "parse config");
+
+void showconf(char *ptr) {
+  printf("%s", config_ro);
+}
+COMMAND("showconf", showconf, "show config");
+
+void appendconf(char *ptr) {
+  printf("adding %s\n", ptr);
+  strncat(config, ptr, sizeof(config) - 1);
+  strncat(config, "\n", sizeof(config) - 1);
+}
+COMMAND("appendconf", appendconf, "append string to config");
+
+void deleteconf(char *ptr) {
+  config[0] = '\0';
+}
+COMMAND("deleteconf", deleteconf, "delete config");
diff --git a/stm32f303/Makefile b/stm32f303/Makefile
index f217849e..13de9dda 100644
--- a/stm32f303/Makefile
+++ b/stm32f303/Makefile
@@ -60,6 +60,7 @@ SOURCES += shared/crc16.c
 SOURCES += shared/angle.c
 SOURCES += shared/hal.c
 SOURCES += shared/commands.c
+SOURCES += shared/flashconf.c
 #SOURCES += shared/hal_term.c
 
 #USB Driver
@@ -94,8 +95,8 @@ SOURCES += $(HAL_DRV_DIR)/Src/stm32f3xx_hal_crc.c
 # SOURCES += $(HAL_DRV_DIR)/Src/stm32f3xx_hal_dac.c
 # SOURCES += $(HAL_DRV_DIR)/Src/stm32f3xx_hal_dac_ex.c
 # SOURCES += $(HAL_DRV_DIR)/Src/stm32f3xx_hal_dma.c
-# SOURCES += $(HAL_DRV_DIR)/Src/stm32f3xx_hal_flash.c
-# SOURCES += $(HAL_DRV_DIR)/Src/stm32f3xx_hal_flash_ex.c
+SOURCES += $(HAL_DRV_DIR)/Src/stm32f3xx_hal_flash.c
+SOURCES += $(HAL_DRV_DIR)/Src/stm32f3xx_hal_flash_ex.c
 SOURCES += $(HAL_DRV_DIR)/Src/stm32f3xx_hal_gpio.c
 SOURCES += $(HAL_DRV_DIR)/Src/stm32f3xx_hal_spi.c
 SOURCES += $(HAL_DRV_DIR)/Src/stm32f3xx_hal_spi_ex.c
diff --git a/stm32f303/STM32F303CBTx_FLASH.ld b/stm32f303/STM32F303CBTx_FLASH.ld
index 12c9a798..9ec74fa5 100644
--- a/stm32f303/STM32F303CBTx_FLASH.ld
+++ b/stm32f303/STM32F303CBTx_FLASH.ld
@@ -62,7 +62,7 @@ MEMORY
 {
 RAM (xrw)      : ORIGIN = 0x20000000, LENGTH = 32K
 CCMRAM (rw)      : ORIGIN = 0x10000000, LENGTH = 8K
-FLASH (rx)      : ORIGIN = 0x8004000, LENGTH = 112K
+FLASH (rx)      : ORIGIN = 0x8004000, LENGTH = 111K
 }
 
 /* Define output sections */