diff --git a/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/Makefile b/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/Makefile new file mode 100644 index 00000000..0da7462e --- /dev/null +++ b/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/Makefile @@ -0,0 +1,26 @@ +## +## This file is part of the libopencm3 project. +## +## Copyright (C) 2009 Uwe Hermann +## Copyright (C) 2012 chrysn +## +## 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 . +## + +BINARY = miniblink + +OBJS += efm32_gpio.o efm32_cmu.o +CFLAGS += -I/tmp/EFM32_CMSIS_2.4.1/efm32lib/inc/ -I /tmp/EFM32_CMSIS_2.4.1/CMSIS/CM3/DeviceSupport/EnergyMicro/EFM32/ -DEFM32TG840F32 -I. + +include ../Makefile.include diff --git a/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/README b/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/README new file mode 100644 index 00000000..49c6d114 --- /dev/null +++ b/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/README @@ -0,0 +1,9 @@ +=================================================== +EFM32-TG-STK3300 Examples miniblink-efm32lib README +=================================================== + +This is a port of the miniblink example to the efm32lib library. + +It's intended for the EFM32-TG-STK3300 eval board. It should blink the user LED +on the board, just as the original miniblink example does. + diff --git a/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/core_cm3.h b/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/core_cm3.h new file mode 100644 index 00000000..6a3fdbbd --- /dev/null +++ b/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/core_cm3.h @@ -0,0 +1,41 @@ +/* the original core_cm3.h is nonfree by arm; this provides libopencm3 variant of the symbols efm32lib needs of CMSIS. */ +#include + +/* needed by system_efm32.h:196, guessing */ +#define __INLINE 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. 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; +} 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) diff --git a/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/efm32_cmu.c b/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/efm32_cmu.c new file mode 120000 index 00000000..168574b0 --- /dev/null +++ b/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/efm32_cmu.c @@ -0,0 +1 @@ +/tmp/EFM32_CMSIS_2.4.1/efm32lib/src/efm32_cmu.c \ No newline at end of file diff --git a/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/efm32_gpio.c b/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/efm32_gpio.c new file mode 120000 index 00000000..0b2df219 --- /dev/null +++ b/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/efm32_gpio.c @@ -0,0 +1 @@ +/tmp/EFM32_CMSIS_2.4.1/efm32lib/src/efm32_gpio.c \ No newline at end of file diff --git a/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/miniblink.c b/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/miniblink.c new file mode 100644 index 00000000..9fa0b230 --- /dev/null +++ b/examples/efm32/tinygecko/efm32-tg-stk3300/miniblink-efm32lib/miniblink.c @@ -0,0 +1,69 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann + * Copyright (C) 2012 chrysn + * + * 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 . + */ + +#include +#include + +void led_setup(void); +void led_toggle(void); + +/** @file + * Minimal example for making the User LED of the EFM32-TG-STK330 eval board blink. + */ + +/** + * Toggle the User LED in an infinite loop, with time between the toggling + * determined by a busy loop stupidly counting up. + */ + +int main(void) +{ + int x; + + led_setup(); + + while(1) { + for(x = 0; x < 200000; ++x) asm("mov r0,r0"); /* no-op, prevent compiler from optimizing this away */ + led_toggle(); + }; +} + +/** + * Enable GPIO, and set up port D7 as an output pin. + */ + +void led_setup(void) +{ + // Before GPIO works, according to d0034_efm32tg_reference_manual.pdf + // note in section 28.3.7, we'll have to enable GPIO in CMU_HFPERCLKEN0 + + CMU->HFPERCLKEN0 |= _CMU_HFPERCLKEN0_GPIO_MASK; + + // The User LED is connected to PD7 to the plus side of the LED + // according to t0011_efm32_tiny_gecko_stk_user_manual.pdf figures 16.2 + // and 16.3 (called UIF_LED0) + + GPIO_PinModeSet(gpioPortD, 7, gpioModePushPull, 0); +} + +void led_toggle(void) +{ + GPIO_PinOutToggle(gpioPortD, 7); +}