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-rw-r--r--include/libopencm3/efm32/memorymap.h37
-rw-r--r--include/libopencm3/efm32/tinygecko/irq.h55
-rw-r--r--include/libopencm3/efm32/tinygecko/memorymap.h76
-rw-r--r--include/libopencm3/efm32/vector.h66
-rw-r--r--include/libopencmsis/core_cm3.h201
5 files changed, 435 insertions, 0 deletions
diff --git a/include/libopencm3/efm32/memorymap.h b/include/libopencm3/efm32/memorymap.h
new file mode 100644
index 0000000..ff0e544
--- /dev/null
+++ b/include/libopencm3/efm32/memorymap.h
@@ -0,0 +1,37 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2012 chrysn <chrysn@fsfe.org>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file
+ *
+ * Dispatcher for the base address definitions, depending on the particular
+ * Gecko family.
+ *
+ * @see tinygecko/memorymap.h
+ */
+
+#ifndef LIBOPENCM3_EFM32_MEMORYMAP_H
+#define LIBOPENCM3_EFM32_MEMORYMAP_H
+
+#ifdef TINYGECKO
+# include <libopencm3/efm32/tinygecko/memorymap.h>
+#else
+# error "efm32 family not defined."
+#endif
+
+#endif
diff --git a/include/libopencm3/efm32/tinygecko/irq.h b/include/libopencm3/efm32/tinygecko/irq.h
new file mode 100644
index 0000000..1b0a484
--- /dev/null
+++ b/include/libopencm3/efm32/tinygecko/irq.h
@@ -0,0 +1,55 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2012 chrysn <chrysn@fsfe.org>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file
+ *
+ * Definitions of interrupt names on EFM32 Tiny Gecko systems
+ *
+ * The names and numbers are taken from d0034_efm32tg_reference_manual.pdf table 4.1.
+ */
+
+#ifndef LIBOPENCM3_EFM32_TINYGECKO_VECTOR_H
+#define LIBOPENCM3_EFM32_TINYGECKO_VECTOR_H
+
+#define IRQ_DMA 0
+#define IRQ_GPIO_EVEN 1
+#define IRQ_TIMER0 2
+#define IRQ_USART0_RX 3
+#define IRQ_USART0_TX 4
+#define IRQ_ACMP01 5
+#define IRQ_ADC0 6
+#define IRQ_DAC0 7
+#define IRQ_I2C0 8
+#define IRQ_GPIO_ODD 9
+#define IRQ_TIMER1 10
+#define IRQ_USART1_RX 11
+#define IRQ_USART1_TX 12
+#define IRQ_LESENSE 13
+#define IRQ_LEUART0 14
+#define IRQ_LETIMER0 15
+#define IRQ_PCNT0 16
+#define IRQ_RTC 17
+#define IRQ_CMU 18
+#define IRQ_VCMP 19
+#define IRQ_LCD 20
+#define IRQ_MSC 21
+#define IRQ_AES 22
+#define IRQ_COUNT 23 /**< See also d0002_efm32_cortex-m3_reference_manual.pdf's table 1.1's "number of interrupts" line, which shows that there are really no more interrupts and it is sufficient to allocate only 23 slots. */
+
+#endif
diff --git a/include/libopencm3/efm32/tinygecko/memorymap.h b/include/libopencm3/efm32/tinygecko/memorymap.h
new file mode 100644
index 0000000..abf37ce
--- /dev/null
+++ b/include/libopencm3/efm32/tinygecko/memorymap.h
@@ -0,0 +1,76 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2012 chrysn <chrysn@fsfe.org>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file
+ *
+ * Layout of the system address space of Tiny Gecko devices.
+ *
+ * This reflects d0034_efm32tg_reference_manual.pdf figure 5.2.
+ */
+
+/* The common cortex-m3 definitions were verified from
+ * d0034_efm32tg_reference_manual.pdf figure 5.2. The CM3 ROM Table seems to be
+ * missing there. The details (everything based on SCS_BASE) was verified from
+ * d0002_efm32_cortex-m3_reference_manual.pdf table 4.1, and seems to fit, but
+ * there are discrepancies. */
+#include <libopencm3/cm3/memorymap.h>
+
+#define CODE_BASE 0x00000000
+
+#define SRAM_BASE 0x20000000
+#define SRAM_BASE_BITBAND 0x22000000
+
+#define PERIPH_BASE 0x40000000
+#define PERIPH_BASE_BITBAND 0x42000000
+
+/* Details of the "Code" section */
+
+#define FLASH_BASE (CODE_BASE + 0x00000000)
+#define USERDATA_BASE (CODE_BASE + 0x0fe00000)
+#define LOCKBITS_BASE (CODE_BASE + 0x0fe04000)
+#define CHIPCONFIG_BASE (CODE_BASE + 0x0fe08000)
+#define CODESPACESRAM_BASE (CODE_BASE + 0x10000000)
+
+/* Tiny Gecko peripherial definitions */
+
+#define VCMP_BASE (PERIPH_BASE + 0x00000000)
+#define ACMP0_BASE (PERIPH_BASE + 0x00001000)
+#define ACMP1_BASE (PERIPH_BASE + 0x00001400)
+#define ADC_BASE (PERIPH_BASE + 0x00002000)
+#define DAC0_BASE (PERIPH_BASE + 0x00004000)
+#define GPIO_BASE (PERIPH_BASE + 0x00006000) /**< @see gpio.h */
+#define I2C0_BASE (PERIPH_BASE + 0x0000a000)
+#define USART0_BASE (PERIPH_BASE + 0x0000c000)
+#define USART1_BASE (PERIPH_BASE + 0x0000c400)
+#define TIMER0_BASE (PERIPH_BASE + 0x00010000)
+#define TIMER1_BASE (PERIPH_BASE + 0x00010400)
+#define RTC_BASE (PERIPH_BASE + 0x00080000)
+#define LETIMER0_BASE (PERIPH_BASE + 0x00082000)
+#define LEUART0_BASE (PERIPH_BASE + 0x00084000)
+#define PCNT0_BASE (PERIPH_BASE + 0x00086000)
+#define WDOG_BASE (PERIPH_BASE + 0x00088000)
+#define LCD_BASE (PERIPH_BASE + 0x0008a000)
+#define LESENSE_BASE (PERIPH_BASE + 0x0008c000)
+#define MSC_BASE (PERIPH_BASE + 0x000c0000)
+#define DMA_BASE (PERIPH_BASE + 0x000c2000)
+#define EMU_BASE (PERIPH_BASE + 0x000c6000)
+#define CMU_BASE (PERIPH_BASE + 0x000c8000) /**< @see cmu.h */
+#define RMU_BASE (PERIPH_BASE + 0x000ca000)
+#define PRS_BASE (PERIPH_BASE + 0x000cc000)
+#define AES_BASE (PERIPH_BASE + 0x000e0000)
diff --git a/include/libopencm3/efm32/vector.h b/include/libopencm3/efm32/vector.h
new file mode 100644
index 0000000..2ae55af
--- /dev/null
+++ b/include/libopencm3/efm32/vector.h
@@ -0,0 +1,66 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2012 chrysn <chrysn@fsfe.org>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file
+ *
+ * Definitions for handling vector tables.
+ *
+ * This implements d0002_efm32_cortex-m3_reference_manual.pdf's figure 2.2.
+ *
+ * The structure of the vector table is implemented independently of the system
+ * vector table starting at memory position 0x0, as it can be relocated to
+ * other memory locations too.
+ *
+ * The exact size of a vector interrupt table depends on the number of
+ * interrupts IRQ_COUNT, which is defined per family.
+ */
+
+#ifndef LIBOPENCM3_EFM32_VECTOR_H
+#define LIBOPENCM3_EFM32_VECTOR_H
+
+#include <libopencm3/cm3/common.h>
+
+#ifdef TINYGECKO
+# include <libopencm3/efm32/tinygecko/irq.h>
+#else
+# error "efm32 family not defined."
+#endif
+
+/** Type of an interrupt function. Only used to avoid hard-to-read function
+ * pointers in the efm32_vector_table_t struct. */
+typedef void (*efm32_vector_table_entry_t)(void);
+
+typedef struct {
+ unsigned int *initial_sp_value; /**< The value the stack pointer is set to initially */
+ efm32_vector_table_entry_t reset;
+ efm32_vector_table_entry_t nmi;
+ efm32_vector_table_entry_t hard_fault;
+ efm32_vector_table_entry_t memory_manage_fault;
+ efm32_vector_table_entry_t bus_fault;
+ efm32_vector_table_entry_t usage_fault;
+ efm32_vector_table_entry_t reserved_x001c[4];
+ efm32_vector_table_entry_t sv_call;
+ efm32_vector_table_entry_t reserved_debug;
+ efm32_vector_table_entry_t reserved_x0034;
+ efm32_vector_table_entry_t pend_sv;
+ efm32_vector_table_entry_t systick;
+ efm32_vector_table_entry_t irq[IRQ_COUNT];
+} efm32_vector_table_t;
+
+#endif
diff --git a/include/libopencmsis/core_cm3.h b/include/libopencmsis/core_cm3.h
new file mode 100644
index 0000000..5ad1327
--- /dev/null
+++ b/include/libopencmsis/core_cm3.h
@@ -0,0 +1,201 @@
+/* big fat FIXME: this should use a consistent structure, and reference
+ * functionality from libopencm3 instead of copypasting.
+ *
+ * particularly unimplemented features are FIXME'd extra
+ * */
+
+#ifndef OPENCMSIS_CORECM3_H
+#define OPENCMSIS_CORECM3_H
+
+/* needed in various places where we rather should include libopencm3 functionality */
+#define MMIO32(addr) (*(volatile uint32_t *)(addr))
+
+/* the original core_cm3.h is nonfree by arm; this provides libopencm3 variant of the symbols efm32lib needs of CMSIS. */
+#include <stdint.h>
+
+/* needed by system_efm32.h:196, guessing */
+#define __INLINE inline
+/* new since emlib 3.0 */
+#define __STATIC_INLINE static inline
+
+/* needed around efm32tg840f32.h:229. comparing the efm32lib definitions to the
+ * libopencm3 ones, "volatile" is all that's missing. */
+#define __IO volatile
+#define __O volatile
+#define __I volatile
+
+/* -> style access for what is defined in libopencm3/stm32/f1/scb.h /
+ * cm3/memorymap.h, as it's needed by efm32lib/inc/efm32_emu.h */
+
+/* from stm32/f1/scb.h */
+#define SCB_SCR_SLEEPDEEP_Msk (1 << 2)
+/* structure as in, for example,
+ * DeviceSupport/EnergyMicro/EFM32/efm32tg840f32.h, data from
+ * libopencm3/stm32/f1/scb.h. FIXME incomplete. */
+typedef struct
+{
+ __IO uint32_t CPUID;
+ __IO uint32_t ICSR;
+ __IO uint32_t VTOR;
+ __IO uint32_t AIRCR;
+ __IO uint32_t SCR;
+ __IO uint32_t CCR;
+ __IO uint8_t SHPR[12]; /* FIXME: how is this properly indexed? */
+ __IO uint32_t SHCSR;
+} SCB_TypeDef;
+#define SCB ((SCB_TypeDef *) SCB_BASE)
+/* from libopencm3/cm3/memorymap.h */
+#define PPBI_BASE 0xE0000000
+#define SCS_BASE (PPBI_BASE + 0xE000)
+#define SCB_BASE (SCS_BASE + 0x0D00)
+
+/* needed by efm32_emu.h, guessing and taking the implementation used in
+ * lightswitch-interrupt.c */
+#define __WFI() __asm__("wfi")
+
+/* needed by efm32_cmu.h, probably it's just what gcc provides anyway */
+#define __CLZ(div) __builtin_clz(div)
+
+/* needed by efm32_aes.c. __builtin_bswap32 does the same thing as the rev instruction according to https://bugzilla.mozilla.org/show_bug.cgi?id=600106 */
+#define __REV(x) __builtin_bswap32(x)
+
+/* stubs for efm32_dbg.h */
+typedef struct
+{
+ uint32_t DHCSR;
+ uint32_t DEMCR; /* needed by efm32tg stk trace.c */
+} CoreDebug_TypeDef;
+/* FIXME let's just hope writes to flash are protected */
+#define CoreDebug ((CoreDebug_TypeDef *) 0)
+#define CoreDebug_DHCSR_C_DEBUGEN_Msk 0
+#define CoreDebug_DEMCR_TRCENA_Msk 0
+
+/* stubs for efm32_dma */
+
+/* also used by the clock example. code taken from stm32's nvic.[hc], FIXME until
+ * the generic cm3 functionality is moved out from stm32 and can be used here
+ * easily (nvic_clear_pending_irq, nvic_enable_irq, nvic_disable_irq). */
+#define NVIC_BASE (SCS_BASE + 0x0100)
+#define NVIC_ISER(iser_id) MMIO32(NVIC_BASE + 0x00 + (iser_id * 4))
+#define NVIC_ICER(icer_id) MMIO32(NVIC_BASE + 0x80 + (icer_id * 4))
+#define NVIC_ICPR(icpr_id) MMIO32(NVIC_BASE + 0x180 + (icpr_id * 4))
+static inline void NVIC_ClearPendingIRQ(uint8_t irqn)
+{
+ NVIC_ICPR(irqn / 32) = (1 << (irqn % 32));
+}
+static inline void NVIC_EnableIRQ(uint8_t irqn)
+{
+ NVIC_ISER(irqn / 32) = (1 << (irqn % 32));
+}
+static inline void NVIC_DisableIRQ(uint8_t irqn)
+{
+ NVIC_ICER(irqn / 32) = (1 << (irqn % 32));
+}
+
+/* stubs for efm32_int. FIXME: how do they do that? nvic documentation in the
+ * efm32 core manual doesn't tell anything of a global on/off switch */
+
+#define __enable_irq() 1
+#define __disable_irq() 1
+
+/* stubs for efm32_mpu FIXME */
+
+#define SCB_SHCSR_MEMFAULTENA_Msk 0
+
+typedef struct
+{
+ uint32_t CTRL;
+ uint32_t RNR;
+ uint32_t RBAR;
+ uint32_t RASR;
+} MPU_TypeDef;
+/* FIXME struct at NULL */
+#define MPU ((MPU_TypeDef *) 0)
+#define MPU_CTRL_ENABLE_Msk 0
+#define MPU_RASR_XN_Pos 0
+#define MPU_RASR_AP_Pos 0
+#define MPU_RASR_TEX_Pos 0
+#define MPU_RASR_S_Pos 0
+#define MPU_RASR_C_Pos 0
+#define MPU_RASR_B_Pos 0
+#define MPU_RASR_SRD_Pos 0
+#define MPU_RASR_SIZE_Pos 0
+#define MPU_RASR_ENABLE_Pos 0
+
+/* required for the blink example */
+
+/* if if (SysTick_Config(CMU_ClockFreqGet(cmuClock_CORE) / 1000)) while (1) ;
+ * configures the sys ticks to 1ms, then the argument to SysTick_Config
+ * describes how many cycles to wait between two systicks.
+ *
+ * the endless loop part looks like an "if it returns an error condition,
+ * rather loop here than continue"; every other solution would involve things
+ * that are dark magic to my understanding.
+ *
+ * implementation more or less copypasted from lib/stm32/systick.c, FIXME until
+ * the generic cm3 functionality is moved out from stm32 and can be used here
+ * easily (systick_set_reload, systick_interrupt_enable, systick_counter_enable
+ * and systick_set_clocksource).
+ *
+ * modified for CMSIS style array as the powertest example needs it.
+ * */
+#define SYS_TICK_BASE (SCS_BASE + 0x0010)
+
+/* from d0002_efm32_cortex-m3_reference_manual.pdf section 4.4 */
+typedef struct
+{
+ uint32_t CTRL;
+ uint32_t LOAD;
+ uint32_t VAL;
+ uint32_t CALIB;
+} SysTick_TypeDef;
+#define SysTick ((SysTick_TypeDef *) SYS_TICK_BASE)
+
+#define STK_CTRL_TICKINT (1 << 1)
+#define STK_CTRL_ENABLE (1 << 0)
+
+#define STK_CTRL_CLKSOURCE_LSB 2
+#define STK_CTRL_CLKSOURCE_AHB 1
+static inline uint32_t SysTick_Config(uint32_t n_ticks)
+{
+ if (n_ticks & ~0x00FFFFFF) return 1;
+ SysTick->LOAD = n_ticks;
+
+ SysTick->CTRL |= (STK_CTRL_CLKSOURCE_AHB << STK_CTRL_CLKSOURCE_LSB);
+
+ SysTick->CTRL |= STK_CTRL_TICKINT;
+
+ SysTick->CTRL |= STK_CTRL_ENABLE;
+
+ return 0;
+}
+
+/* stubs for efm32tg stk trace.c */
+typedef struct
+{
+ uint32_t LAR;
+ uint32_t TCR;
+} ITM_TypeDef;
+/* FIXME struct at NULL */
+#define ITM ((ITM_TypeDef *) 0)
+
+/* blink.h expects the isr for systicks to be named SysTick_Handler. with this,
+ * its Systick_Handler function gets renamed to the weak symbol exported by
+ * vector.c */
+#define SysTick_Handler sys_tick_handler
+
+/* likewise, clock.c defines GPIO_ODD_IRQHandler and GPIO_EVEN_IRQHandler */
+#define GPIO_ODD_IRQHandler gpio_odd_isr
+#define GPIO_EVEN_IRQHandler gpio_even_isr
+#define RTC_IRQHandler rtc_isr
+
+/* for inttemp (i should really get a list and convert them all) */
+
+#define ADC0_IRQHandler adc0_isr
+
+/* for the lightsense example */
+
+#define LESENSE_IRQHandler lesense_isr
+#define PCNT0_IRQHandler pcnt0_isr
+
+#endif