Type change

src/mcu/at32f4/fpec.c

@@ -1 +0,0 @@
-../stm32f1/fpec.c

src/mcu/at32f4/fpec.c

@@ -0,0 +1,66 @@
+/*
+ * f1/fpec.c
+ * 
+ * STM32F10x Flash Memory Program/Erase Controller (FPEC).
+ * 
+ * Written & released by Keir Fraser <keir.xen@gmail.com>
+ * 
+ * This is free and unencumbered software released into the public domain.
+ * See the file COPYING for more details, or visit <http://unlicense.org>.
+ */
+
+static void fpec_wait_and_clear(void)
+{
+    while (flash->sr & FLASH_SR_BSY)
+        continue;
+    flash->sr = FLASH_SR_EOP | FLASH_SR_WRPRTERR | FLASH_SR_PGERR;
+    flash->cr = 0;
+}
+
+void fpec_init(void)
+{
+    /* Erases and writes require the HSI oscillator. */
+    rcc->cr |= RCC_CR_HSION;
+    while (!(rcc->cr & RCC_CR_HSIRDY))
+        cpu_relax();
+
+    /* Unlock the FPEC. */
+    if (flash->cr & FLASH_CR_LOCK) {
+        flash->keyr = FLASH_UNLOCK_KEY1;
+        flash->keyr = FLASH_UNLOCK_KEY2;
+    }
+
+    fpec_wait_and_clear();
+}
+
+void fpec_page_erase(uint32_t flash_address)
+{
+    fpec_wait_and_clear();
+    flash->cr |= FLASH_CR_PER;
+    flash->ar = flash_address;
+    flash->cr |= FLASH_CR_STRT;
+    fpec_wait_and_clear();
+}
+
+void fpec_write(const void *data, unsigned int size, uint32_t flash_address)
+{
+    uint16_t *_f = (uint16_t *)flash_address;
+    const uint16_t *_d = data;
+
+    fpec_wait_and_clear();
+    for (; size != 0; size -= 2) {
+        flash->cr |= FLASH_CR_PG;
+        *_f++ = *_d++; 
+        fpec_wait_and_clear();
+   }
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "Linux"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */