Init Support for Family SAML21

Makefile

@@ -5,6 +5,9 @@ CC=arm-none-eabi-gcc
 ifeq ($(CHIP_FAMILY), samd21)
 COMMON_FLAGS = -mthumb -mcpu=cortex-m0plus -Os -g -DSAMD21
 endif
+ifeq ($(CHIP_FAMILY), saml21)
+COMMON_FLAGS = -mthumb -mcpu=cortex-m0plus -Os -g -DSAML21
+endif
 ifeq ($(CHIP_FAMILY), samd51)
 COMMON_FLAGS = -mthumb -mcpu=cortex-m4 -O2 -g -DSAMD51
 endif
@@ -34,6 +37,12 @@ BOOTLOADER_SIZE=8192
 SELF_LINKER_SCRIPT=scripts/samd21j18a_self.ld
 endif
 
+ifeq ($(CHIP_FAMILY), saml21)
+LINKER_SCRIPT=scripts/saml21j18b.ld
+BOOTLOADER_SIZE=8192
+SELF_LINKER_SCRIPT=scripts/saml21j18b_self.ld
+endif
+
 ifeq ($(CHIP_FAMILY), samd51)
 LINKER_SCRIPT=scripts/samd51j19a.ld
 BOOTLOADER_SIZE=16384
@@ -50,6 +59,9 @@ INCLUDES = -I. -I./inc -I./inc/preprocessor
 INCLUDES += -I./boards/$(BOARD) -Ilib/cmsis/CMSIS/Include -Ilib/usb_msc
 INCLUDES += -I$(BUILD_PATH)
 
+ifeq ($(CHIP_FAMILY), saml21)
+INCLUDES += -Ilib/saml21/saml21b/include/
+endif
 
 ifeq ($(CHIP_FAMILY), samd21)
 INCLUDES += -Ilib/samd21/samd21a/include/

boards/bast-wan/board.mk

@@ -0,0 +1,2 @@
+CHIP_FAMILY = saml21
+CHIP_VARIANT = SAML21J18B

boards/bast-wan/board_config.h

@@ -0,0 +1,18 @@
+#ifndef BOARD_CONFIG_H
+#define BOARD_CONFIG_H
+
+#define __SAML21J18B__ 1
+
+#define VENDOR_NAME "Generic Corp."
+#define PRODUCT_NAME "SAML21 Board"
+#define VOLUME_LABEL "SAML21"
+
+#define USB_VID 0x03EB   // Atmel
+#define USB_PID 0x2402   // Generic HID device
+
+#define BOARD_ID "SAML21J18B-Generic"
+
+#define LED_PIN PIN_PA17
+
+
+#endif

inc/uf2.h

@@ -243,14 +243,17 @@ void padded_memcpy(char *dst, const char *src, int len);
 #ifdef SAMD21
 #define DBL_TAP_PTR ((volatile uint32_t *)(HMCRAMC0_ADDR + HMCRAMC0_SIZE - 4))
 #endif
+#ifdef SAML21
+#define DBL_TAP_PTR ((volatile uint32_t *)(HSRAM_ADDR + LPRAM_SIZE - 4))
+#endif
 #ifdef SAMD51
 #define DBL_TAP_PTR ((volatile uint32_t *)(HSRAM_ADDR + HSRAM_SIZE - 4))
 #endif
 #define DBL_TAP_MAGIC 0xf01669ef // Randomly selected, adjusted to have first and last bit set
 #define DBL_TAP_MAGIC_QUICK_BOOT 0xf02669ef
 
 #if USE_SINGLE_RESET
-#ifdef SAMD21
+#if defined(SAMD21) || defined(SAML21)
 #define SINGLE_RESET() (*((uint32_t *)0x20B4) == 0x87eeb07c)
 #endif
 #ifdef SAMD51
@@ -292,7 +295,7 @@ void handoverPrep(void);
 #define CONCAT_0(a, b) CONCAT_1(a, b)
 #define STATIC_ASSERT(e) enum { CONCAT_0(_static_assert_, __LINE__) = 1 / ((e) ? 1 : 0) }
 
-#ifdef SAMD21
+#if defined(SAMD21) || defined(SAML21)
 STATIC_ASSERT(FLASH_ROW_SIZE == FLASH_PAGE_SIZE * 4);
 STATIC_ASSERT(FLASH_ROW_SIZE == NVMCTRL_ROW_SIZE);
 STATIC_ASSERT(FLASH_NUM_ROWS * 4 == FLASH_NB_OF_PAGES);

inc/uf2format.h

@@ -11,6 +11,10 @@
 #define APP_START_ADDRESS 0x00002000
 #define UF2_FAMILY 0x68ed2b88
 #endif
+#ifdef SAML21
+#define APP_START_ADDRESS 0x00002000
+#define UF2_FAMILY 0x68ed2b88
+#endif
 #ifdef SAMD51
 #define APP_START_ADDRESS 0x00004000
 #define UF2_FAMILY 0x55114460